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some improvements

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This commit is contained in:
Dominik Meyer 2013-07-26 12:33:01 +02:00
parent a53abe0ff9
commit c46379c117
30 changed files with 1251 additions and 315 deletions
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2
Makefile.files
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@ -1,4 +1,4 @@
VHDL_PKG += src/cpupkg.vhd VHDL_PKG += src/cpupkg.vhd
VHDL_TB += src/TBRechner.vhd VHDL_TB += src/TBRechner.vhd
VHDL_SRC += src/RegFile.vhd src/CPU.vhd src/MemInterface.vhd src/antibeat_device.vhd src/FetchDecode.vhd src/ALU.vhd src/RAM.vhd VHDL_SRC += src/RegFile.vhd src/CPU.vhd src/MemInterface.vhd src/antibeat_device.vhd src/FetchDecode.vhd src/ALU.vhd src/RAM.vhd
VHDL_SRC += src/SOC.vhd src/Steuerwerk.vhd src/Rechner.vhd VHDL_SRC += src/SOC.vhd src/Steuerwerk.vhd src/MemGuard.vhd src/MMIO_Uart.vhd src/clkDivider.vhd src/ClkEnable.vhd src/MemoryMapper.vhd

14
UCF/xc5vlx110t-3-ff1136.ucf Normal file
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@ -0,0 +1,14 @@
NET idRS232 LOC="AG15"; # Bank 4, Vcco=3.3V, No DCI
NET odRS232 LOC="AG20"; # Bank 4, Vcco=3.3V, No DCI
NET reset LOC="E9";
NET ic200MhzClk LOC = L19 | IOSTANDARD = LVTTL; #200Mhz Clk
NET clk LOC = "AH15"; #100Mhz clk
NET data_print_2(0) LOC="AE24" | IOSTANDARD = SSTL18_II_DCI;
NET data_print_2(1) LOC="AD24" | IOSTANDARD = SSTL18_II_DCI;
NET data_print_2(2) LOC="AD25" | IOSTANDARD = SSTL18_II_DCI;
NET data_print_2(3) LOC="G16" | IOSTANDARD = LVTTL;
NET data_print_2(4) LOC="AD26" | IOSTANDARD = SSTL18_II_DCI;
NET data_print_2(5) LOC="G15" | IOSTANDARD = LVTTL;
NET data_print_2(6) LOC="L18" | IOSTANDARD = LVTTL;
NET data_print_2(7) LOC="H18" | IOSTANDARD = LVTTL;

6
asm/bootloader.s Normal file
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@ -0,0 +1,6 @@
start:

43
asm/test-jmc.s Normal file
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@ -0,0 +1,43 @@
start:
lui $0, 0
lui $1, 35
lui $2, 36
jmc print
sto $1, 65521
jmc print
jmp end
print:
add $30, $31, $0
sto $30, 65521
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
sto $30, 65521
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
sto $30, 65521
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
shr $30, $30, $0
sto $30, 65521
sto $1, 65521
ret
sto $2, 65521
end:
hlt

60
asm/test-read-uart.s Normal file
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@ -0,0 +1,60 @@
start:
loa $1, 65520
jmc print
jmc wait
jmp start
print:
add $20, $1, $0
sto $20, 65521
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
sto $20, 65521
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
sto $20, 65521
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
shr $20, $20, $0
sto $20, 65521
ret
wait:
lui $10, 600
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
shl $10, $10, $0
lui $11, 1
loop:
sub $10, $10, $11
jpz endloop
jmp loop
endloop:
ret

7
asm/uart-test.s Normal file
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@ -0,0 +1,7 @@
start:
lui $1, 71
loop:
sto $1, 65521
jmp loop
hlt

21
scripts/asm.pl
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@ -6,7 +6,7 @@
my $nr_instr_bytes = 4; my $nr_instr_bytes = 4;
my $nr_opcode_bits = 6; my $nr_opcode_bits = 6;
my $nr_reg_bits = 5; my $nr_reg_bits = 5;
my $startaddr = 0; my $startaddr = -1;
# mnemonnic to opcode conversion # mnemonnic to opcode conversion
my %opcodes = ( my %opcodes = (
@ -26,6 +26,8 @@ my %opcodes = (
'jpc' => 0x0D, 'jpc' => 0x0D,
'jmp' => 0x0E, 'jmp' => 0x0E,
'lui' => 0x0F, 'lui' => 0x0F,
'jmc' => 0x10,
'ret' => 0x11,
'hlt' => 0x3F 'hlt' => 0x3F
); );
@ -303,6 +305,14 @@ while ( my $line = <$src> ) {
} }
elsif ( $INSTR eq "jpc" ) { elsif ( $INSTR eq "jpc" ) {
$label = $REST; $label = $REST;
}
elsif ( $INSTR eq "jmc" ) {
$label = $REST;
my $dst = 31;
$dst = $dst << 21;
$opc = $opc | $dst;
} }
elsif ( $INSTR eq "jmp" ) { elsif ( $INSTR eq "jmp" ) {
$label = $REST; $label = $REST;
@ -325,6 +335,12 @@ while ( my $line = <$src> ) {
die("ASM: wrong number of parameters for lui in line $lines\n") die("ASM: wrong number of parameters for lui in line $lines\n")
; ;
} }
}
elsif ( $INSTR eq "ret" ) {
my $op1=31;
$op1 = $op1 << 16;
$opc = $opc | $op1;
} }
elsif ( $INSTR =~ /^(.*):$/ ) { elsif ( $INSTR =~ /^(.*):$/ ) {
$labels{$1} = $addr; $labels{$1} = $addr;
@ -346,6 +362,9 @@ while ( my $line = <$src> ) {
$instruction->{comment} = $line; $instruction->{comment} = $line;
$instruction->{label} = $label; $instruction->{label} = $label;
if ($line =~/jmc/) {
print "-" .$instruction->{label}."-\n";
}
push( @instructions, $instruction ); push( @instructions, $instruction );
} }

4
src/ALU.vhd
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@ -53,7 +53,7 @@ begin
sdOp1 <= '0' & idOperand1; sdOp1 <= '0' & idOperand1;
sdOp2 <= '0' & idOperand2; sdOp2 <= '0' & idOperand2;
process (sdOp1, sdOp2, idCarryIn, icOperation, idImmidiate) process (sdOp1, sdOp2, idCarryIn, icOperation, idImmidiate, idOperand1)
begin begin
if (icOperation = shl) then if (icOperation = shl) then
sdTempResult <= sdOp1(31 downto 0) & "0"; sdTempResult <= sdOp1(31 downto 0) & "0";
@ -65,7 +65,7 @@ begin
sdTempResult <= (others => '-'); sdTempResult <= (others => '-');
elsif (icOperation = loa) then elsif (icOperation = loa) then
sdTempResult <= sdOp2; sdTempResult <= '0' & idImmidiate;
elsif (icOperation = li) then elsif (icOperation = li) then
sdTempResult <= '0' & idImmidiate; sdTempResult <= '0' & idImmidiate;
elsif (icOperation = add) then elsif (icOperation = add) then

39
src/CPU.vhd
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@ -57,7 +57,10 @@ architecture Behavioral of CPU is
ocLoadInstr : out std_logic; --! load instruction control signal ocLoadInstr : out std_logic; --! load instruction control signal
ocNextPC : out std_logic; --! increment pc ocNextPC : out std_logic; --! increment pc
ocAddrSel : out std_logic; --! pc on addressbus ocAddrSel : out std_logic; --! pc on addressbus
ocJump : out std_logic --! do a ocJump ocJump : out std_logic; --! do a ocJump
ocPCregister : out std_logic; --! put PC to register File
ocUsePC : out std_logic; --! use Register to fill in the PC
ocLoad : out std_logic --! put databus to ALU immediate port
); );
end component; end component;
@ -71,6 +74,8 @@ architecture Behavioral of CPU is
odRegA : out DATA; odRegA : out DATA;
odRegB : out DATA; odRegB : out DATA;
icPC : in std_logic; -- select PC as input to RegisterFile
idPC : in DATA;
icRegINsel : in std_logic_vector(4 downto 0); icRegINsel : in std_logic_vector(4 downto 0);
@ -110,6 +115,9 @@ architecture Behavioral of CPU is
icLoadInstr : in std_logic; icLoadInstr : in std_logic;
icJump : in std_logic; icJump : in std_logic;
icNextPC : in std_logic; icNextPC : in std_logic;
idPC : in ADDRESS;
icUsePC : in std_logic;
odPC : out ADDRESS;
odAddress : out ADDRESS; odAddress : out ADDRESS;
odImmidiate : out DATA; odImmidiate : out DATA;
@ -135,6 +143,15 @@ architecture Behavioral of CPU is
); );
end component; end component;
signal sdPC : DATA;
signal scPCregister : std_logic;
signal scUsePC : std_logic;
signal sdPCfetch : ADDRESS;
signal scLoad : std_logic;
signal scOpCode : optype; signal scOpCode : optype;
signal sdCarryRF : std_logic; signal sdCarryRF : std_logic;
signal sdZeroRF : std_logic; signal sdZeroRF : std_logic;
@ -148,10 +165,10 @@ architecture Behavioral of CPU is
signal sdAkkuRes : DATA; signal sdAkkuRes : DATA;
signal sdCarryAkku : std_logic; signal sdCarryAkku : std_logic;
signal sdZeroAkku : std_logic; signal sdZeroAkku : std_logic;
signal sdDataOut : DATA;
signal sdDataIn : DATA; signal sdDataIn : DATA;
signal sdAddress : ADDRESS; signal sdAddress : ADDRESS;
signal sdImmidiate : DATA; signal sdImmidiate : DATA;
signal sdImmidiateALU: DATA;
signal sdRegAsel : std_logic_vector(4 downto 0); signal sdRegAsel : std_logic_vector(4 downto 0);
signal sdRegBsel : std_logic_vector(4 downto 0); signal sdRegBsel : std_logic_vector(4 downto 0);
signal sdRegINsel : std_logic_vector(4 downto 0); signal sdRegINsel : std_logic_vector(4 downto 0);
@ -172,7 +189,10 @@ begin
ocLoadInstr => scLoadInstr, ocLoadInstr => scLoadInstr,
ocNextPC => scNextPC, ocNextPC => scNextPC,
ocAddrSel => scAddrSel, ocAddrSel => scAddrSel,
ocJump => scJump ocJump => scJump,
ocPCregister => scPCregister,
ocUsePC => scUsePC,
ocLoad => scLoad
); );
RF: RegFile PORT MAP( RF: RegFile PORT MAP(
@ -183,6 +203,9 @@ begin
icRegBsel => sdRegBsel, icRegBsel => sdRegBsel,
icRegINsel => sdRegINsel, icRegINsel => sdRegINsel,
icPC => scPCregister,
idPC => sdPC,
idDataIn => sdAkkuRes, idDataIn => sdAkkuRes,
idCarryIn => sdCarryAkku, idCarryIn => sdCarryAkku,
idZeroIn => sdZeroAkku, idZeroIn => sdZeroAkku,
@ -198,7 +221,7 @@ begin
Calc : ALU Port MAP( Calc : ALU Port MAP(
idOperand1 => sdRegA, idOperand1 => sdRegA,
idOperand2 => sdRegB, idOperand2 => sdRegB,
idImmidiate => sdImmidiate, idImmidiate => sdImmidiateALU,
idCarryIn => sdCarryRF, idCarryIn => sdCarryRF,
odResult => sdAkkuRes, odResult => sdAkkuRes,
@ -208,6 +231,8 @@ begin
icOperation => scOpCode icOperation => scOpCode
); );
sdPC(31 downto 16) <= (others=>'0');
FaD : FetchDecode PORT MAP( FaD : FetchDecode PORT MAP(
iClk => iClk, iClk => iClk,
iReset => iReset, iReset => iReset,
@ -218,6 +243,9 @@ begin
icJump => scJump, icJump => scJump,
icNextPC => scNextPC, icNextPC => scNextPC,
odPC => sdPC(15 downto 0),
idPC => sdRegA(15 downto 0),
icUsePC => scUsePC,
odAddress => sdAddress, odAddress => sdAddress,
odImmidiate => sdImmidiate, odImmidiate => sdImmidiate,
odRegAsel => sdRegAsel, odRegAsel => sdRegAsel,
@ -240,5 +268,8 @@ begin
); );
sdImmidiateALU <= bdData when scLoad='1' else
sdImmidiate;
end Behavioral; end Behavioral;

64
src/ClkEnable.vhd Normal file
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@ -0,0 +1,64 @@
--------------------------------------------------------------------------------
-- Entity: ClkEnable
--------------------------------------------------------------------------------
-- Copyright ... 2011
-- Filename : ClkEnable.vhd
-- Creation date : 2012-04-06
-- Author(s) : marcel eckert (eckert@hsu-hh.de)
--------------------------------------------------------------------------------
--! @file
--! @brief Implements a generic ClkEnable generator
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
--! brief Implements a generic ClkEnable generator
--! detailed Implements a generic ClkEnable generator. Based on an input frequency
--! <GEN_FreqIn_Hz>, an output enable (1 <GEN_FreqIn_Hz> period) is generated every
--! <GEN_FreqOut_Hz> periods
entity clkEnable is
generic(
GEN_FreqIn_Hz : integer := 200000000; --! signal description input clock frequency in Hz for <iClkIn>
GEN_FreqOut_Hz : integer := 100000000 --! signal description output clock frequency in Hz for <oClkEn>
);
port (
iClkin : in STD_LOGIC; --! signal description input clock
iReset : in STD_LOGIC; --! signal description synchronous reset (should be tied to '0')
oeClkEn : out STD_LOGIC --! signal description output clockEnable
);
end clkEnable;
architecture Behavioral of clkEnable is
constant cLimit : integer := GEN_FreqIn_Hz / GEN_FreqOut_Hz;
signal sCounter : integer range 0 to (cLimit-1) := 0;
signal seClkEn : STD_LOGIC := '1';
begin
process (iClkIn)
begin
if (rising_edge(iClkIn)) then
if (iReset = '1') then
sCounter <= 0;
seClkEn <= '1';
elsif (sCounter = (cLimit-1)) then
sCounter <= 0;
seClkEn <= '1';
else
sCounter <= sCounter + 1;
seClkEn <= '0';
end if;
end if;
end process;
oeClkEn <= seClkEn;
end Behavioral;

22
src/FetchDecode.vhd
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@ -43,7 +43,9 @@ entity FetchDecode is
icLoadInstr : in std_logic; icLoadInstr : in std_logic;
icJump : in std_logic; icJump : in std_logic;
icNextPC : in std_logic; icNextPC : in std_logic;
odPC : out ADDRESS;
idPC : in ADDRESS;
icUsePC : in std_logic;
odAddress : out ADDRESS; odAddress : out ADDRESS;
odImmidiate : out DATA; odImmidiate : out DATA;
odRegAsel : out std_logic_vector(4 downto 0); odRegAsel : out std_logic_vector(4 downto 0);
@ -66,7 +68,7 @@ architecture Behavioral of FetchDecode is
signal scOp, scOp_next : OPTYPE; signal scOp, scOp_next : OPTYPE;
begin begin
Transition: process(idData, sdImmidate, icLoadInstr, icJump, icNextPC, sdAdr, sdPC, scOp, sdRegAsel, sdRegBsel, sdRegINsel) Transition: process(idData, sdImmidate, icLoadInstr, icJump, icNextPC, sdAdr, sdPC, scOp, sdRegAsel, sdRegBsel, sdRegINsel, icUsePC, idPC)
begin begin
-- defaults -- defaults
sdAdr_next <= sdAdr; sdAdr_next <= sdAdr;
@ -80,7 +82,7 @@ begin
--! ISA Definition --! ISA Definition
if (icLoadInstr = '1') then if (icLoadInstr = '1') then
sdAdr_next <= "0000" & idData(11 downto 0); sdAdr_next <= idData(15 downto 0);
sdImmidiate_next <= "0000000000000000" & idData(15 downto 0); sdImmidiate_next <= "0000000000000000" & idData(15 downto 0);
sdRegINsel_next <= idData(25 downto 21); sdRegINsel_next <= idData(25 downto 21);
sdRegAsel_next <= idData(20 downto 16); sdRegAsel_next <= idData(20 downto 16);
@ -103,10 +105,16 @@ begin
when "001101" => scOp_next <= jpc; when "001101" => scOp_next <= jpc;
when "001110" => scOp_next <= jmp; when "001110" => scOp_next <= jmp;
when "001111" => scOP_next <= li; when "001111" => scOP_next <= li;
when "010000" => scOp_next <= jmc;
when "010001" => scOp_next <= ret;
when others => scOp_next <= hlt; when others => scOp_next <= hlt;
end case; end case;
end if; end if;
if (icUsePC = '1') then
sdPC_next <= idPC;
end if;
if (icJump = '1') then if (icJump = '1') then
sdPC_next <= sdAdr; sdPC_next <= sdAdr;
@ -114,8 +122,9 @@ begin
if (icNextPC = '1') then if (icNextPC = '1') then
sdPC_next <= sdPC + '1'; sdPC_next <= sdPC + '1';
end if; end if;
end process; end process;
@ -145,10 +154,13 @@ begin
end process; end process;
-- Output -- Output
odAddress <= sdAdr when icAddrSel = '0' and icLoadInstr = '0' else odAddress <= idPC when icUsePC = '1' else
sdAdr when icAddrSel = '0' and icLoadInstr = '0' else
sdAdr_next when icAddrSel = '0' and icLoadInstr = '1' else sdAdr_next when icAddrSel = '0' and icLoadInstr = '1' else
sdPC; -- addr_sel = '1' sdPC; -- addr_sel = '1'
odPC <= sdPC;
ocOperation <= scOp when icLoadInstr = '0' else ocOperation <= scOp when icLoadInstr = '0' else
scOp_next; scOp_next;

283
src/MMIO_Uart.vhd Normal file
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@ -0,0 +1,283 @@
-------------------------------------------------------
--! @file
--! @brief <short description>
--! @author Dominik Meyer
--! @email dmeyer@hsu-hh.de
--! @date 2013-07-18
-------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.numeric_std.all;
library work;
use work.cpupkg.all;
entity MMIO_Uart is
generic (
GEN_start : std_logic_vector(15 downto 0) := x"FFF0";
GEN_SysClockinHz : integer := 100000000;
GEN_Baudrate : integer := 57600;
GEN_HasExternBaudLimit : boolean := true
);
port (
odRS232 : out std_logic;
idRS232 : in std_logic;
ocInterrupt : out std_logic; --! high if data is available
odDebug : out std_logic_vector(7 downto 0);
iClk : in std_logic;
iReset : in std_logic;
bdData : inout DATA; --! connection to databus
idAddress : in ADDRESS; --! connection to addressbus
icEnable : in std_logic; --! enable or disable RAM
icRnotW : in std_logic --! read/write control
);
end MMIO_Uart;
architecture arch of MMIO_Uart is
component UART
generic (
GEN_SysClockinHz : integer;
GEN_Baudrate : integer;
GEN_HasExternBaudLimit : boolean
);
port (
iSysClk : in std_logic;
ieClkEn : in std_logic;
iReset : in std_logic;
icBaudLExt : in integer;
icSend : in std_logic;
idDataSend : in std_logic_vector ( 7 downto 0 );
ocSEmpty : out std_logic;
ocSFull : out std_logic;
ocSAlmostE : out std_logic;
ocSAlmostF : out std_logic;
odTransmit : out std_logic;
odDataRcvd : out std_logic_vector ( 7 downto 0 );
ocREmpty : out std_logic;
ocRFull : out std_logic;
ocRAlmostE : out std_logic;
ocRAlmostF : out std_logic;
icRReadEn : in std_logic;
idReceive : in std_logic
);
end component;
signal srTransmit : std_logic_vector(31 downto 0);
signal srReceive : std_logic_vector(31 downto 0);
signal srStatus : std_logic_vector(31 downto 0);
signal srBaud : std_logic_vector(31 downto 0);
signal scBaud : integer;
signal tData : DATA;
--
-- UART
--
signal scUARTsend, scUartReadEnable : std_logic;
signal scUARTSempty, scUARTSfull : std_logic;
signal scUARTSalmostE, scUARTSalmostF : std_logic;
signal scUARTRempty, scUARTRfull : std_logic;
signal scUARTRalmostE, scUARTRalmostF : std_logic;
--
-- FSM
--
type states is (st_start, st_idle, st_read, st_write);
signal current_state : states;
begin
scBaud <= to_integer(unsigned(srBaud));
odDebug <= srTransmit(7 downto 0);
uart0: UART
generic map(
GEN_SysClockinHz => GEN_SysClockinHz,
GEN_Baudrate => GEN_Baudrate,
GEN_HasExternBaudLimit => GEN_HasExternBaudLimit
)
port map(
iSysClk => iClk,
ieClkEn => '1',
iReset => iReset,
icBaudLExt => scBaud,
icSend => scUARTsend,
idDataSend => srTransmit(7 downto 0),
ocSEmpty => scUARTSempty,
ocSFull => scUARTSfull,
ocSAlmostE => scUARTSalmostE,
ocSAlmostF => scUARTSalmostF,
odTransmit => odRS232,
odDataRcvd => srReceive(7 downto 0),
ocREmpty => scUARTRempty,
ocRFull => scUARTRfull,
ocRAlmostE => scUARTRalmostE,
ocRAlmostF => scUARTRalmostF,
icRReadEn => scUartReadEnable,
idReceive => idRS232
);
srStatus <= scUARTRempty & scUARTRfull & scUARTRalmostE & scUARTRalmostF & scUARTSempty & scUARTSfull & scUARTSalmostE & scUARTSalmostF & x"000000";
ocInterrupt <= not scUARTRempty;
process(iClk, iReset)
begin
if (iReset = '1') then
srBaud <= (others=>'0');
srTransmit <= x"00000000";
srReceive(30 downto 8) <= (others=>'0');
current_state <= st_start;
elsif (rising_edge(iClk)) then
case current_state is
when st_start =>
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_idle;
when st_idle =>
if (icEnable = '1' and idAddress >= GEN_start and idAddress <= GEN_start + 2) then
-- Status Register
if (idAddress = GEN_start) then
if (icRnotW = '0') then
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_write;
else
tData <= srStatus;
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_read;
end if;
-- Transmit Register
elsif(idAddress = GEN_start+1) then
if (icRnotW = '0') then
srTransmit <= bdData;
scUARTsend <= '1';
scUartReadEnable <= '0';
current_state <= st_write;
else
tData <= (others=>'0');
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_read;
end if;
-- receive Register
elsif(idAddress = GEN_start+2) then
if (icRnotW = '0') then
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_write;
else
tData <= srReceive;
scUARTsend <= '0';
scUartReadEnable <= '1';
current_state <= st_read;
end if;
end if;
else
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_idle;
end if;
when st_read =>
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_idle;
when st_write =>
scUARTsend <= '0';
scUartReadEnable <= '0';
current_state <= st_idle;
end case;
end if;
end process;
bdData <= srStatus when icRnotW = '1' and idAddress=GEN_start else
srReceive when icRnotW = '1' and idAddress=GEN_start+2 else
(others => 'Z');
end arch;

46
src/MemGuard.vhd Normal file
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@ -0,0 +1,46 @@
-------------------------------------------------------
--! @file
--! @brief memory guard to only answer for the correct memory space
--! @author Dominik Meyer
--! @email dmeyer@hsu-hh.de
--! @date 2013-07-18
-------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
--! memory guard to only answer for the correct memory space
entity MemGuard is
generic (
GEN_start : std_logic_vector(15 downto 0) := x"0000";
GEN_end : std_logic_vector(15 downto 0) := x"0004"
);
port (
icAddr : in std_logic_vector(15 downto 0);
ocEnable : out std_logic
);
end MemGuard;
architecture arch of MemGuard is
begin
process(icAddr)
begin
if (icAddr >= GEN_start and icAddr <= GEN_end) then
ocEnable <= '1';
else
ocEnable <= '0';
end if;
end process;
end arch;

54
src/MemoryMapper.vhd Normal file
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@ -0,0 +1,54 @@
-------------------------------------------------------
--! @file
--! @brief Maps memory devices to a given memory space
--! @author Dominik Meyer
--! @email dmeyer@hsu-hh.de
--! @date 2010-06-03
-------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
--! Maps memory devices to a given memory space
entity MemoryMapper is
port(
start : in std_logic_vector(15 downto 0); --! start of memory space
stop : in std_logic_vector(15 downto 0); --! end of mempry space
adr_in : in std_logic_vector(15 downto 0);
req_in : in std_logic; --! ram request type
req_out : out std_logic; --! ram request type
enable : out std_logic;
adr_out : out std_logic_vector(15 downto 0)
);
end MemoryMapper;
--! architecture to map memory devices to memory space
architecture arch of MemoryMapper is
begin
process(adr_in, req_in, start, stop)
begin
if (adr_in >= start and adr_in <= stop) then
req_out <= req_in;
adr_out <= adr_in-start;
enable <= '1';
else
req_out <= '0';
enable <= '0';
adr_out <= (others => 'Z');
end if;
end process;
end arch;

72
src/RAM.vhd
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@ -34,17 +34,61 @@ architecture arch of RAM is
type MEMORY is ARRAY(0 to 255) of DATA; --! array of data words type MEMORY is ARRAY(0 to 255) of DATA; --! array of data words
constant Prog1 : MEMORY := ( --! 4k * 32bit of RAM constant Prog1 : MEMORY := ( --! 4k * 32bit of RAM
1 => B"00111100001000000000000000000101", --lui $1, 5 0 => B"00001100001000001111111111110000", --loa $1, 65520
2 => B"00111100010000000000000000000110", --lui $2, 6 1 => B"01000011111000000000000000000100", --jmc print
3 => B"00111100011000000000000000000000", --lui $3, 0 2 => B"01000011111000000000000000100010", --jmc wait
4 => B"00111100100000000000000000000001", --lui $4, 1 3 => B"00111000000000000000000000000000", --jmp start
5 => B"00010000101000000001000000000000", --add $5, $0, $2 4 => B"00010010100000010000000000000000", --add $20, $1, $0
6 => B"00010000011000110000100000000000", --add $3, $3, $1 5 => B"00001000000101001111111111110001", --sto $20, 65521
7 => B"00010100101001010010000000000000", --sub $5, $5, $4 6 => B"00000110100101000000000000000000", --shr $20, $20, $0
8 => B"00110000000000000000000000001010", --jpz end 7 => B"00000110100101000000000000000000", --shr $20, $20, $0
9 => B"00111000000000000000000000000110", --jmp loop 8 => B"00000110100101000000000000000000", --shr $20, $20, $0
10 => B"11111100000000000000000000000000", --hlt 9 => B"00000110100101000000000000000000", --shr $20, $20, $0
10 => B"00000110100101000000000000000000", --shr $20, $20, $0
11 => B"00000110100101000000000000000000", --shr $20, $20, $0
12 => B"00000110100101000000000000000000", --shr $20, $20, $0
13 => B"00000110100101000000000000000000", --shr $20, $20, $0
14 => B"00001000000101001111111111110001", --sto $20, 65521
15 => B"00000110100101000000000000000000", --shr $20, $20, $0
16 => B"00000110100101000000000000000000", --shr $20, $20, $0
17 => B"00000110100101000000000000000000", --shr $20, $20, $0
18 => B"00000110100101000000000000000000", --shr $20, $20, $0
19 => B"00000110100101000000000000000000", --shr $20, $20, $0
20 => B"00000110100101000000000000000000", --shr $20, $20, $0
21 => B"00000110100101000000000000000000", --shr $20, $20, $0
22 => B"00000110100101000000000000000000", --shr $20, $20, $0
23 => B"00001000000101001111111111110001", --sto $20, 65521
24 => B"00000110100101000000000000000000", --shr $20, $20, $0
25 => B"00000110100101000000000000000000", --shr $20, $20, $0
26 => B"00000110100101000000000000000000", --shr $20, $20, $0
27 => B"00000110100101000000000000000000", --shr $20, $20, $0
28 => B"00000110100101000000000000000000", --shr $20, $20, $0
29 => B"00000110100101000000000000000000", --shr $20, $20, $0
30 => B"00000110100101000000000000000000", --shr $20, $20, $0
31 => B"00000110100101000000000000000000", --shr $20, $20, $0
32 => B"00001000000101001111111111110001", --sto $20, 65521
33 => B"01000100000111110000000000000000", --ret
34 => B"00111101010000000000001001011000", --lui $10, 600
35 => B"00000001010010100000000000000000", --shl $10, $10, $0
36 => B"00000001010010100000000000000000", --shl $10, $10, $0
37 => B"00000001010010100000000000000000", --shl $10, $10, $0
38 => B"00000001010010100000000000000000", --shl $10, $10, $0
39 => B"00000001010010100000000000000000", --shl $10, $10, $0
40 => B"00000001010010100000000000000000", --shl $10, $10, $0
41 => B"00000001010010100000000000000000", --shl $10, $10, $0
42 => B"00000001010010100000000000000000", --shl $10, $10, $0
43 => B"00000001010010100000000000000000", --shl $10, $10, $0
44 => B"00000001010010100000000000000000", --shl $10, $10, $0
45 => B"00000001010010100000000000000000", --shl $10, $10, $0
46 => B"00000001010010100000000000000000", --shl $10, $10, $0
47 => B"00000001010010100000000000000000", --shl $10, $10, $0
48 => B"00000001010010100000000000000000", --shl $10, $10, $0
49 => B"00000001010010100000000000000000", --shl $10, $10, $0
50 => B"00111101011000000000000000000001", --lui $11, 1
51 => B"00010101010010100101100000000000", --sub $10, $10, $11
52 => B"00110000000000000000000000110110", --jpz endloop
53 => B"00111000000000000000000000110011", --jmp loop
54 => B"01000100000111110000000000000000", --ret
others => (others => '0') others => (others => '0')
@ -67,17 +111,19 @@ begin
tData <= (others => '0'); tData <= (others => '0');
elsif (rising_edge(iClk)) then elsif (rising_edge(iClk)) then
if (icRnotW = '0' and icEnable = '1') then if (icEnable = '1') then
if (icRnotW = '0') then
sRam(conv_integer(unsigned(idAddress))) <= bdData; sRam(conv_integer(unsigned(idAddress))) <= bdData;
else else
tData <= sRam(conv_integer(unsigned(idAddress))); tData <= sRam(conv_integer(unsigned(idAddress)));
end if; end if;
end if;
end if; end if;
end process; end process;
bdData <= tData when icRnotW = '1' else bdData <= tData when icRnotW = '1' and icEnable='1' else
(others => 'Z'); (others => 'Z');
end arch; end arch;

68
src/Rechner.vhd
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@ -1,68 +0,0 @@
library ieee;
use ieee.std_logic_1164.all;
library work;
use work.cpupkg.all;
entity Rechner is -- Rechner setzt sich aus CPU, RAM und Bus zusammen
port( clk : in std_logic; -- Taktsignal
reset : in std_logic; -- Resetsignal
data_print_1: out DATA;
data_print_2: out DATA
);
end Rechner;
architecture Struktur of Rechner is
signal DATAbus : std_logic_vector(31 downto 0); -- DATAbus
signal address : std_logic_vector(15 downto 0); -- Adressbus
signal rw_ram : std_logic; -- read/write-Signal RAM
signal enable : std_logic;
component CPU is
Port(
iClk : in std_logic;
iReset : in std_logic;
bdData : inout DATA; --! connection to databus
odAddress : out std_logic_vector(15 downto 0); --! connection to addressbus
ocEnable : out std_logic; --! enable or disable RAM
ocRnotW : out std_logic --! read/write control
);
end component;
component RAM is
port (
iClk : in std_logic;
iReset : in std_logic;
bdData : inout DATA; --! connection to databus
idAddress : in std_logic_vector(15 downto 0); --! connection to addressbus
icEnable : in std_logic; --! enable or disable RAM
icRnotW : in std_logic --! read/write control
);
end component;
begin
CPU_1: CPU port map(
iClk => clk,
iReset => reset,
bdData => DATAbus,
odAddress => address,
ocEnable => enable,
ocRnotW => rw_ram);
RAM_1: RAM port map(
iClk => clk,
iReset => reset,
bdData => DATAbus,
idAddress => address,
icEnable => enable,
icRnotW => rw_ram);
data_print_1 <= DATAbus; -- Ausgabe des DATAbus auf dem LCD-Display
data_print_2 <= "0000000000000000" & address;
end Struktur;

6
src/RegFile.vhd
View File

@ -35,6 +35,8 @@ entity RegFile is
odRegA : out DATA; odRegA : out DATA;
odRegB : out DATA; odRegB : out DATA;
icPC : in std_logic; -- select PC as input to RegisterFile
idPC : in DATA;
icRegINsel : in std_logic_vector(4 downto 0); icRegINsel : in std_logic_vector(4 downto 0);
@ -76,7 +78,11 @@ begin
elsif (rising_edge(iClk)) then elsif (rising_edge(iClk)) then
if (icLoadEn = '1') then if (icLoadEn = '1') then
if (icPC = '0') then
registerFile(to_integer(unsigned(icRegINsel))) <= idDataIn; registerFile(to_integer(unsigned(icRegINsel))) <= idDataIn;
else
registerFile(to_integer(unsigned(icRegINsel))) <= idPC;
end if;
sdCarry <= idCarryIn; sdCarry <= idCarryIn;
sdZero <= idZeroIn; sdZero <= idZeroIn;

18
src/SOC.ucf
View File

@ -1,18 +0,0 @@
NET clk LOC = C9; # Taktsignal Taktgenerator
NET clk_man LOC = H18; # Manuelles Taktsignal <20>ber Taster button north
NET reset LOC = N17; # Reset, Schiebeschalter links
NET switch(0) LOC = L13; # SW0
NET switch(1) LOC = L14; # SW1
NET led(0) LOC = F12;
NET led(1) LOC = E12;
NET led(2) LOC = E11;
NET led(3) LOC = F11;
NET led(4) LOC = C11;
NET led(5) LOC = D11;
NET led(6) LOC = E9;
NET led(7) LOC = F9;
NET "clk_man" CLOCK_DEDICATED_ROUTE = FALSE;

223
src/SOC.vhd
View File

@ -1,68 +1,197 @@
library IEEE; library ieee;
use IEEE.STD_LOGIC_1164.ALL; use ieee.std_logic_1164.all;
use IEEE.STD_LOGIC_ARITH.ALL;
library work; library work;
use work.cpupkg.all; use work.cpupkg.all;
entity SOC is -- Testumgebung f<>r Rechner entity SOC is -- Rechner setzt sich aus CPU, RAM und Bus zusammen
port( clk : in std_logic; -- Taktsignal port( clk : in std_logic; -- Taktsignal
clk_man : in std_logic; -- manuelles Taktsignal
reset : in std_logic; -- Resetsignal reset : in std_logic; -- Resetsignal
led : out std_logic_vector(7 downto 0); odRS232 : out std_logic;
switch : in std_logic_vector(1 downto 0)); idRS232 : in std_logic;
data_print_1: out DATA;
data_print_2: out DATA;
ic200MhzClk : in std_logic
);
end SOC; end SOC;
architecture Struktur of SOC is architecture arch of SOC is
component Rechner is -- Rechner setzt sich aus CPU, RAM und Bus zusammen component CPU is
port( clk : in std_logic; -- Taktsignal Port(
reset : in std_logic; -- Resetsignal iClk : in std_logic;
data_print_1: out DATA; iReset : in std_logic;
data_print_2: out DATA); -- Ausgabe bdData : inout DATA; --! connection to databus
end component Rechner; odAddress : out std_logic_vector(15 downto 0); --! connection to addressbus
ocEnable : out std_logic; --! enable or disable RAM
component antibeat_device is ocRnotW : out std_logic --! read/write control
port (
button_in : in std_logic; --! the button input, for example the button from an fpga
button_out : out std_logic; --! the button output, for example going to the reset or clk of a processor
counter : in std_logic_vector(31 downto 0); --! the number of clk ticks to wait
clk : in std_logic; --! input clock
reset : in std_logic
); );
end component antibeat_device; end component;
component RAM is
port (
iClk : in std_logic;
iReset : in std_logic;
bdData : inout DATA; --! connection to databus
idAddress : in std_logic_vector(15 downto 0); --! connection to addressbus
icEnable : in std_logic; --! enable or disable RAM
icRnotW : in std_logic --! read/write control
);
end component;
signal data_print_1 : std_logic_vector(31 downto 0); component MemoryMapper
signal data_print_2 : std_logic_vector(31 downto 0); port (
signal sig_entprellt : std_logic; start : in std_logic_vector ( 15 downto 0 );
stop : in std_logic_vector ( 15 downto 0 );
adr_in : in std_logic_vector ( 15 downto 0 );
req_in : in std_logic;
req_out : out std_logic;
enable : out std_logic;
adr_out : out std_logic_vector ( 15 downto 0 )
);
end component;
component MMIO_Uart
generic (
GEN_start : std_logic_vector ( 15 downto 0 );
GEN_SysClockinHz : integer;
GEN_Baudrate : integer;
GEN_HasExternBaudLimit : boolean
);
port (
odRS232 : out std_logic;
idRS232 : in std_logic;
ocInterrupt : out std_logic; --! high if data is available
odDebug : out std_logic_vector(7 downto 0);
iClk : in std_logic;
iReset : in std_logic;
bdData : inout DATA;
idAddress : in ADDRESS;
icEnable : in std_logic;
icRnotW : in std_logic
);
end component;
component clkDivider
generic (
GEN_FreqIn_Hz : integer;
GEN_FreqOut_Hz : integer
);
port (
iClk_in : in STD_LOGIC;
iReset : in STD_LOGIC;
oClk_out : out STD_LOGIC
);
end component;
signal DATAbus : std_logic_vector(31 downto 0); -- DATAbus
signal address : std_logic_vector(15 downto 0); -- Adressbus
signal rw_ram : std_logic; -- read/write-Signal RAM
signal enable : std_logic;
signal scRAMenable : std_logic;
signal scRAM_RnotW : std_logic;
signal scRAM_address : std_logic_vector(15 downto 0);
signal scUARTenable : std_logic;
signal scUART_RnotW : std_logic;
signal scUART_address : std_logic_vector(15 downto 0);
signal scClk20Mhz : std_logic;
signal sdDebug : std_logic_vector(7 downto 0);
signal scReset : std_logic;
signal output : std_logic_vector(15 downto 0);
signal clk_out : std_logic;
begin begin
-- select what to display on led scReset <= not reset;
led <= --(others => '1') when reset='1' else
output(15 downto 8) when switch(0)='1' else
output(7 downto 0);
output <= data_print_1(15 downto 0) when switch(1) = '0' else divider0:clkDivider
data_print_2(15 downto 0); generic map(
GEN_FreqIn_Hz => 200000000,
antibeat: antibeat_device GEN_FreqOut_Hz => 20000000
)
port map( port map(
button_in => clk_man, iClk_in => ic200MhzClk,
button_out => clk_out, iReset => '0',
counter => x"019BFCC0", oClk_out => scClk20Mhz
clk => clk,
reset => reset
); );
Rechner_0 : Rechner port map(clk => clk_out,
reset => reset,
data_print_1=> data_print_1,
data_print_2=> data_print_2);
end Struktur;
CPU_1: CPU port map(
iClk => scClk20Mhz,
iReset => scReset,
bdData => DATAbus,
odAddress => address,
ocEnable => enable,
ocRnotW => rw_ram);
mapperRAM: MemoryMapper
port map(
start => x"0000",
stop => x"00FF",
adr_in => address,
req_in => rw_ram,
req_out => scRAM_RnotW,
enable => scRAMenable,
adr_out => scRAM_address
);
RAM_1: RAM port map(
iClk => scClk20Mhz,
iReset => scReset,
bdData => DATAbus,
idAddress => scRAM_address,
icEnable => scRAMenable,
icRnotW => scRAM_RnotW);
mapperUart: MemoryMapper
port map(
start => x"FFF0",
stop => x"FFF2",
adr_in => address,
req_in => rw_ram,
req_out => scUART_RnotW,
enable => scUARTenable,
adr_out => scUART_address
);
uart0: MMIO_Uart
generic map(
GEN_start => x"0000",
GEN_SysClockinHz => 20000000,
GEN_Baudrate => 57600,
GEN_HasExternBaudLimit => false
)
port map(
odRS232 => odRS232,
idRS232 => idRS232,
ocInterrupt => open,
odDebug => sdDebug,
iClk => scClk20Mhz,
iReset => scReset,
bdData => DATAbus,
idAddress => scUART_address,
icEnable => scUARTenable,
icRnotW => scUART_RnotW
);
data_print_1 <= DATAbus;
data_print_2 <= x"000000" & sdDebug;
end arch;

96
src/Steuerwerk.vhd
View File

@ -27,14 +27,17 @@ entity Steuerwerk is
ocLoadInstr : out std_logic; --! load instruction control signal ocLoadInstr : out std_logic; --! load instruction control signal
ocNextPC : out std_logic; --! increment pc ocNextPC : out std_logic; --! increment pc
ocAddrSel : out std_logic; --! pc on addressbus ocAddrSel : out std_logic; --! pc on addressbus
ocJump : out std_logic --! do a ocJump ocJump : out std_logic; --! do a ocJump
ocPCregister : out std_logic; --! put PC to register File
ocUsePC : out std_logic; --! use Register to fill in the PC
ocLoad : out std_logic --! put databus to ALU immediate port
); );
end Steuerwerk; end Steuerwerk;
architecture arch of Steuerwerk is architecture arch of Steuerwerk is
type STATES is (load, decode, exshl, exshr, exsto, exloa, exli, exadd, exsub, exaddc, exsubc, type STATES is (load, decode, exshl, exshr, exsto, exloa, exli, exadd, exsub, exaddc, exsubc,
exopor, exopand, exopxor, exopnot, exjpz, exjpc, exjmp, exhlt); exopor, exopand, exopxor, exopnot, exjpz, exjpc, exjmp, exhlt, exjmc, exret);
signal sState, sState_next : STATES; signal sState, sState_next : STATES;
@ -84,7 +87,8 @@ begin
sState_next <= load; sState_next <= load;
end if; end if;
when jmp => sState_next <= exjmp; when jmp => sState_next <= exjmp;
when jmc => sState_next <= exjmc;
when ret => sState_next <= exret;
when hlt => sState_next <= exhlt; when hlt => sState_next <= exhlt;
end case; end case;
when exhlt => sState_next <= exhlt; when exhlt => sState_next <= exhlt;
@ -109,6 +113,9 @@ begin
ocNextPC <= '0'; -- do not increment pc ocNextPC <= '0'; -- do not increment pc
ocAddrSel <= '1'; -- pc on addressbus ocAddrSel <= '1'; -- pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when decode => when decode =>
ocRnotWRam <= '1'; -- read from RAM ocRnotWRam <= '1'; -- read from RAM
@ -118,6 +125,9 @@ begin
ocNextPC <= '1'; -- do not increment pc ocNextPC <= '1'; -- do not increment pc
ocAddrSel <= '0'; -- pc on addressbus ocAddrSel <= '0'; -- pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exshl => when exshl =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -127,6 +137,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exshr => when exshr =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -136,6 +149,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exsto => when exsto =>
ocRnotWRam <= '0'; -- write to RAM ocRnotWRam <= '0'; -- write to RAM
@ -145,6 +161,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exloa => when exloa =>
ocRnotWRam <= '1'; -- read from RAM ocRnotWRam <= '1'; -- read from RAM
@ -154,6 +173,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '1';
when exli => when exli =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -163,6 +185,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exadd => when exadd =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -172,6 +197,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exsub => when exsub =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -181,6 +209,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exaddc => when exaddc =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -190,6 +221,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exsubc => when exsubc =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -199,6 +233,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exopor => when exopor =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -208,6 +245,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exopand => when exopand =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -217,6 +257,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exopxor => when exopxor =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -226,6 +269,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exopnot => when exopnot =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -235,6 +281,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exjpz => when exjpz =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -244,6 +293,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '1'; -- ocJump ocJump <= '1'; -- ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exjpc => when exjpc =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -253,6 +305,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '1'; -- ocJump ocJump <= '1'; -- ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exjmp => when exjmp =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
@ -262,6 +317,34 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '1'; -- ocJump ocJump <= '1'; -- ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exjmc =>
ocRnotWRam <= '0'; -- read from RAM
ocLoadEn <= '1'; -- save result
ocEnableRAM <= '0'; -- do not put akku on databus
ocLoadInstr <= '0'; -- do not load instruction
ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '1'; -- ocJump
ocPCregister<= '1'; -- put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when exret =>
ocRnotWRam <= '0'; -- read from RAM
ocLoadEn <= '0'; -- save result
ocEnableRAM <= '0'; -- do not put akku on databus
ocLoadInstr <= '0'; -- do not load instruction
ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- ocJump
ocPCregister<= '0'; -- put PC to register File
ocUsePC <= '1';
ocLoad <= '0';
when exhlt => when exhlt =>
ocRnotWRam <= '0'; -- read from RAM ocRnotWRam <= '0'; -- read from RAM
ocLoadEn <= '0'; -- save result ocLoadEn <= '0'; -- save result
@ -270,6 +353,9 @@ begin
ocNextPC <= '0'; -- increment pc ocNextPC <= '0'; -- increment pc
ocAddrSel <= '0'; -- no pc on addressbus ocAddrSel <= '0'; -- no pc on addressbus
ocJump <= '0'; -- no ocJump ocJump <= '0'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
when others => when others =>
ocRnotWRam <= '-'; -- read from RAM ocRnotWRam <= '-'; -- read from RAM
@ -279,6 +365,10 @@ begin
ocNextPC <= '-'; -- increment pc ocNextPC <= '-'; -- increment pc
ocAddrSel <= '-'; -- no pc on addressbus ocAddrSel <= '-'; -- no pc on addressbus
ocJump <= '-'; -- no ocJump ocJump <= '-'; -- no ocJump
ocPCregister <= '0'; -- do not put PC to register File
ocUsePC <= '0';
ocLoad <= '0';
end case; end case;
end process; end process;

16
src/TBRechner.vhd
View File

@ -39,10 +39,13 @@ ARCHITECTURE behavior OF TBRechner IS
-- Component Declaration for the Unit Under Test (UUT) -- Component Declaration for the Unit Under Test (UUT)
COMPONENT Rechner COMPONENT SOC
PORT( PORT(
clk : IN std_logic; clk : IN std_logic;
reset : IN std_logic; reset : IN std_logic;
odRS232 : out std_logic;
idRS232 : in std_logic;
ic200MhzClk : in std_logic;
data_print_1 : OUT std_logic_vector(31 downto 0); data_print_1 : OUT std_logic_vector(31 downto 0);
data_print_2 : OUT std_logic_vector(31 downto 0) data_print_2 : OUT std_logic_vector(31 downto 0)
); );
@ -51,19 +54,24 @@ ARCHITECTURE behavior OF TBRechner IS
--Inputs --Inputs
signal clk : std_logic := '0'; signal clk : std_logic := '0';
signal reset : std_logic := '1'; signal reset : std_logic := '0';
signal data_print_1 : std_logic_vector(31 downto 0); signal data_print_1 : std_logic_vector(31 downto 0);
signal data_print_2 : std_logic_vector(31 downto 0); signal data_print_2 : std_logic_vector(31 downto 0);
signal idRS232, odRS232 : std_logic;
-- Clock period definitions -- Clock period definitions
constant clk_period : time := 10 ns; constant clk_period : time := 10 ns;
BEGIN BEGIN
-- Instantiate the Unit Under Test (UUT) -- Instantiate the Unit Under Test (UUT)
uut: Rechner PORT MAP ( uut: SOC PORT MAP (
clk => clk, clk => clk,
ic200MhzClk => clk,
reset => reset, reset => reset,
idRS232 => idRS232,
odRS232 => odRS232,
data_print_1 => data_print_1, data_print_1 => data_print_1,
data_print_2 => data_print_2 data_print_2 => data_print_2
); );
@ -84,7 +92,7 @@ BEGIN
-- hold reset state for 100 ns. -- hold reset state for 100 ns.
wait for 100 ns; wait for 100 ns;
reset <= '0'; reset <= '1';
wait for clk_period*10; wait for clk_period*10;

88
src/Test.vhd Normal file
View File

@ -0,0 +1,88 @@
--------------------------------------------------------------------------------
-- Entity: Test
-- Date:2013-07-18
-- Author: byterazor
--
-- Description ${cursor}
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity Test is
port (
idRS232 : in std_logic;
odRS232 : out std_logic;
icReset : in std_logic;
icClk : in std_logic -- input clock, xx MHz.
);
end Test;
architecture arch of Test is
component UART
generic (
GEN_SysClockinHz : integer;
GEN_Baudrate : integer;
GEN_HasExternBaudLimit : boolean
);
port (
iSysClk : in std_logic;
ieClkEn : in std_logic;
iReset : in std_logic;
icBaudLExt : in integer;
icSend : in std_logic;
idDataSend : in std_logic_vector ( 7 downto 0 );
ocSEmpty : out std_logic;
ocSFull : out std_logic;
ocSAlmostE : out std_logic;
ocSAlmostF : out std_logic;
odTransmit : out std_logic;
odDataRcvd : out std_logic_vector ( 7 downto 0 );
ocREmpty : out std_logic;
ocRFull : out std_logic;
ocRAlmostE : out std_logic;
ocRAlmostF : out std_logic;
icRReadEn : in std_logic;
idReceive : in std_logic
);
end component;
begin
uart0: UART
generic map(
GEN_SysClockinHz => 100000000,
GEN_Baudrate => GEN_Baudrate,
GEN_HasExternBaudLimit => GEN_HasExternBaudLimit
)
port map(
iSysClk => iSysClk,
ieClkEn => ieClkEn,
iReset => iReset,
icBaudLExt => icBaudLExt,
icSend => icSend,
idDataSend => idDataSend,
ocSEmpty => ocSEmpty,
ocSFull => ocSFull,
ocSAlmostE => ocSAlmostE,
ocSAlmostF => ocSAlmostF,
odTransmit => odTransmit,
odDataRcvd => odDataRcvd,
ocREmpty => ocREmpty,
ocRFull => ocRFull,
ocRAlmostE => ocRAlmostE,
ocRAlmostF => ocRAlmostF,
icRReadEn => icRReadEn,
idReceive => idReceive
);
end arch;

16
src/UART/Fifo.vhd
View File

@ -30,8 +30,8 @@ entity Fifo is
iClkRead : in std_logic; iClkRead : in std_logic;
icReadEn : in std_logic; icReadEn : in std_logic;
idDataIn : in std_logic_vector(8 downto 0); idDataIn : in std_logic_vector(7 downto 0);
odDataOut : out std_logic_vector(8 downto 0); odDataOut : out std_logic_vector(7 downto 0);
ocEmpty : out std_logic; ocEmpty : out std_logic;
ocFull : out std_logic; ocFull : out std_logic;
@ -44,8 +44,6 @@ end Fifo;
architecture arch of Fifo is architecture arch of Fifo is
signal sdDataOut : std_logic_vector(31 downto 0); signal sdDataOut : std_logic_vector(31 downto 0);
signal sdDataIn : std_logic_vector(31 downto 0); signal sdDataIn : std_logic_vector(31 downto 0);
signal sdParityIN: std_logic_vector(3 downto 0);
signal sdParityOut:std_logic_vector(3 downto 0);
begin begin
FIFO36_inst : FIFO36 FIFO36_inst : FIFO36
@ -64,7 +62,7 @@ begin
ALMOSTEMPTY => ocAlmostE, -- 1-bit almost empty output flag ALMOSTEMPTY => ocAlmostE, -- 1-bit almost empty output flag
ALMOSTFULL => ocAlmostF, -- 1-bit almost full output flag ALMOSTFULL => ocAlmostF, -- 1-bit almost full output flag
DO => sdDataOut, -- 32-bit data output DO => sdDataOut, -- 32-bit data output
DOP => sdParityOut, -- 4-bit parity data output DOP => open, -- 4-bit parity data output
EMPTY => ocEmpty, -- 1-bit empty output flag EMPTY => ocEmpty, -- 1-bit empty output flag
FULL => ocFull, -- 1-bit full output flag FULL => ocFull, -- 1-bit full output flag
RDCOUNT => open, -- 13-bit read count output RDCOUNT => open, -- 13-bit read count output
@ -72,7 +70,7 @@ begin
WRCOUNT => open, -- 13-bit write count output WRCOUNT => open, -- 13-bit write count output
WRERR => open, -- 1-bit write error WRERR => open, -- 1-bit write error
DI => sdDataIn, -- 32-bit data input DI => sdDataIn, -- 32-bit data input
DIP => sdParityIn, -- 4-bit parity input DIP => "1111", -- 4-bit parity input
RDCLK => iClkRead, -- 1-bit read clock input RDCLK => iClkRead, -- 1-bit read clock input
RDEN => icReadEn, -- 1-bit read enable input RDEN => icReadEn, -- 1-bit read enable input
RST => iReset, -- 1-bit reset input RST => iReset, -- 1-bit reset input
@ -80,9 +78,7 @@ begin
WREN => icWriteEn -- 1-bit write enable input WREN => icWriteEn -- 1-bit write enable input
); );
odDataOut(8 downto 1) <= sdDataOut(7 downto 0); odDataOut <= sdDataOut(7 downto 0);
odDataOut(0) <= sdParityOut(0); sdDataIn <= X"000000" & idDataIn;
sdDataIn <= X"000000" & idDataIn(8 downto 1);
sdParityIN <= "000" & idDataIn(0);
end arch; end arch;

20
src/UART/Receiver.vhd
View File

@ -27,17 +27,15 @@ entity Receiver is
ie4BaudClkEn : in std_logic;reset : in std_logic; --! signal description asynchronous reset ie4BaudClkEn : in std_logic;reset : in std_logic; --! signal description asynchronous reset
Rx : in STD_LOGIC; --! signal description signal for the RS232 Rx line Rx : in STD_LOGIC; --! signal description signal for the RS232 Rx line
data : out STD_LOGIC_VECTOR (7 downto 0); --! signal description last data received data : out STD_LOGIC_VECTOR (7 downto 0); --! signal description last data received
parity : out std_logic; --! signal description
icEnableParity: in std_logic; --! signal description Enable reception of the parity bit
ready : out STD_LOGIC); --! '0' signals receving in progress, if '1' after a previous '0' signals data available at <data> ready : out STD_LOGIC); --! '0' signals receving in progress, if '1' after a previous '0' signals data available at <data>
end Receiver; end Receiver;
architecture Behavioral of Receiver is architecture Behavioral of Receiver is
signal z, tz : integer range 0 to 63; signal z, tz : integer range 0 to 63;
signal result, tresult : STD_LOGIC_VECTOR(7 downto 0); signal result, tresult : STD_LOGIC_VECTOR(7 downto 0);
signal sdParity : std_logic;
begin begin
process (z, Rx, icEnableParity) process (z, Rx)
begin begin
if z = 0 then if z = 0 then
if (Rx ='0') then if (Rx ='0') then
@ -48,8 +46,7 @@ begin
elsif z <= 36 then elsif z <= 36 then
tz <= z + 1; tz <= z + 1;
elsif (z <= 40 and icEnableParity='1') then
tz <= z+1;
else else
tz <= 0; tz <= 0;
@ -58,12 +55,11 @@ begin
tresult <= Rx & result(7 downto 1); tresult <= Rx & result(7 downto 1);
process (iSysClk) process (reset, iSysClk)
begin begin
if (iSysClk'event and iSysClk = '1') then if (iSysClk'event and iSysClk = '1') then
if reset = '1' then if reset = '1' then
z <= 0; z <= 0;
sdParity <= '0';
elsif ie4BaudClkEn = '1' then elsif ie4BaudClkEn = '1' then
z <= tz; z <= tz;
case z is case z is
@ -92,13 +88,6 @@ begin
when 33 => when 33 =>
result <= tresult; -- D(7) result <= tresult; -- D(7)
when 37 =>
result <= result;
if (icEnableParity='1') then
sdParity <= Rx;
else
sdParity <= '0';
end if;
-- optional TODO: add check for STOP-Bit(s) -- optional TODO: add check for STOP-Bit(s)
when others => result <= result; when others => result <= result;
@ -107,7 +96,6 @@ begin
end if; end if;
end process; end process;
parity <= sdParity;
data <= result; data <= result;
ready <= '1' when z = 0 else '0'; ready <= '1' when z = 0 else '0';

22
src/UART/ReceiverAndFifo.vhd
View File

@ -22,20 +22,19 @@ use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all; use ieee.std_logic_unsigned.all;
entity ReceiverAndFifo is entity ReceiverAndFifo is
port ( port (
iSysClk : in std_logic; --! signal description System side clock iSysClk : in std_logic; --! signal description System side clock
ieClkEn : in std_logic; ieClkEn : in std_logic;
ie4xBaudClkEn : in std_logic; --! signal description UART clock (4xBAUD Rate frequency!) ie4xBaudClkEn : in std_logic; --! signal description UART clock (4xBAUD Rate frequency!)
iReset : in std_logic; --! signal description asynchronous reset iReset : in std_logic; --! signal description asynchronous reset
icEnableParity: in std_logic; --! signal description allow reception of parity bit
odDataRcvd : out std_logic_vector(7 downto 0); --! signal description data from Fifo odDataRcvd : out std_logic_vector(7 downto 0); --! signal description data from Fifo
odParity : out std_logic; --! possible parity bit
ocREmpty : out std_logic; --! signal description indicates that Fifo is empty ocREmpty : out std_logic; --! signal description indicates that Fifo is empty
ocRFull : out std_logic; --! signal description indicates that Fifo is full ocRFull : out std_logic; --! signal description indicates that Fifo is full
ocRAlmostE : out std_logic; --! signal description indicates that Fifo is empty to half full ocRAlmostE : out std_logic; --! signal description indicates that Fifo is empty to half full
ocRAlmostF : out std_logic; --! signal description indicates that Fifo is half full to full ocRAlmostF : out std_logic; --! signal description indicates that Fifo is half full to full
icRReadEn : in std_logic; --! signal description get next value from Fifo (Fifo is in First Word Fall Through Mode!) icRReadEn : in std_logic; --! signal description get next value from Fifo (Fifo is in First Word Fall Through Mode!)
idReceive : in std_logic --! signal description signal for the RS232 Tx line idReceive : in std_logic --! signal description signal for the RS232 Tx line
); );
end ReceiverAndFifo; end ReceiverAndFifo;
@ -49,8 +48,6 @@ architecture arch of ReceiverAndFifo is
reset : in STD_LOGIC; reset : in STD_LOGIC;
Rx : in STD_LOGIC; Rx : in STD_LOGIC;
data : out STD_LOGIC_VECTOR (7 downto 0); data : out STD_LOGIC_VECTOR (7 downto 0);
parity : out std_logic;
icEnableParity: in std_logic;
ready : out STD_LOGIC); ready : out STD_LOGIC);
end component; end component;
@ -64,8 +61,8 @@ architecture arch of ReceiverAndFifo is
iClkRead : in std_logic; iClkRead : in std_logic;
icReadEn : in std_logic; icReadEn : in std_logic;
idDataIn : in std_logic_vector(8 downto 0); idDataIn : in std_logic_vector(7 downto 0);
odDataOut : out std_logic_vector(8 downto 0); odDataOut : out std_logic_vector(7 downto 0);
ocEmpty : out std_logic; ocEmpty : out std_logic;
ocFull : out std_logic; ocFull : out std_logic;
@ -78,8 +75,7 @@ architecture arch of ReceiverAndFifo is
signal scRWrite : std_logic; signal scRWrite : std_logic;
signal scRWriteEn : std_logic; signal scRWriteEn : std_logic;
signal seRReadEn : std_logic; signal seRReadEn : std_logic;
signal sdDataRcvd : STD_LOGIC_VECTOR (8 downto 0); signal sdDataRcvd : STD_LOGIC_VECTOR (7 downto 0);
signal sdParity : std_logic;
signal scRcvrEmpty : std_logic; signal scRcvrEmpty : std_logic;
signal scRcvrFull : std_logic; signal scRcvrFull : std_logic;
@ -105,8 +101,7 @@ begin
icReadEn => seRReadEn, icReadEn => seRReadEn,
idDataIn => sdDataRcvd, idDataIn => sdDataRcvd,
odDataOut(8 downto 1) => odDataRcvd, odDataOut => odDataRcvd,
odDataOut(0) => odParity,
ocEmpty => scRcvrEmpty, ocEmpty => scRcvrEmpty,
ocFull => scRcvrFull, ocFull => scRcvrFull,
@ -126,13 +121,10 @@ begin
ie4BaudClkEn => ie4xBaudClkEn, ie4BaudClkEn => ie4xBaudClkEn,
reset => iReset, reset => iReset,
Rx => idReceive, Rx => idReceive,
data => sdDataRcvd(8 downto 1), data => sdDataRcvd,
parity => sdDataRcvd(0),
icEnableParity => icEnableParity,
ready => scReaderReady ready => scReaderReady
); );
ReceiverCtrl : process (iSysClk) ReceiverCtrl : process (iSysClk)
begin begin
if (rising_edge(iSysClk)) then if (rising_edge(iSysClk)) then

21
src/UART/Sender.vhd
View File

@ -27,17 +27,15 @@ entity Sender is
iReset : in STD_LOGIC; --! signal description synchronous reset iReset : in STD_LOGIC; --! signal description synchronous reset
icSend : in STD_LOGIC; --! signal description force a send of <idData> icSend : in STD_LOGIC; --! signal description force a send of <idData>
idData : in STD_LOGIC_VECTOR (7 downto 0); --! signal description the data to be sent idData : in STD_LOGIC_VECTOR (7 downto 0); --! signal description the data to be sent
idParity : in std_logic; --! signal description the parity bit of the data
icEnableParity:in std_logic; --! signal description enable sending of the parity bit
odTransmit : out STD_LOGIC; --! signal description signal for the RS232 Tx line odTransmit : out STD_LOGIC; --! signal description signal for the RS232 Tx line
ocReady : out STD_LOGIC; --! signal description signals availability of the Sender (no Sending in Progress) ocReady : out STD_LOGIC; --! signal description signals availability of the Sender (no Sending in Progress)
ocSyn : out STD_LOGIC); --! signal description signals sending of first Stop Bit ocSyn : out STD_LOGIC); --! signal description signals sending of first Stop Bit
end Sender; end Sender;
architecture Behavioral of Sender is architecture Behavioral of Sender is
signal temp, tnext :STD_LOGIC_VECTOR(12 downto 0); signal temp, tnext :STD_LOGIC_VECTOR(11 downto 0);
type StateType is (WAITING, INIT, HIGH, START, DATA0, DATA1, DATA2, DATA3, DATA4, DATA5, DATA6, DATA7, PARITY, STOP1, STOP2); type StateType is (WAITING, INIT, HIGH, START, DATA0, DATA1, DATA2, DATA3, DATA4, DATA5, DATA6, DATA7, STOP1, STOP2);
signal state : StateType; signal state : StateType;
begin begin
process(iSysClk) process(iSysClk)
@ -55,11 +53,7 @@ begin
case state is case state is
when WAITING => when WAITING =>
if (icSend = '1') then if (icSend = '1') then
if (icEnableParity = '1') then temp <= "11" & idData & "01";
temp <= "11" & idParity & idData & "01";
else
temp <= "111" & idData & "01";
end if;
state <= INIT; state <= INIT;
else else
state <= WAITING; state <= WAITING;
@ -96,13 +90,6 @@ begin
state <= DATA7; state <= DATA7;
when DATA7 => when DATA7 =>
if (icEnableParity = '1') then
state <= PARITY;
else
state <= STOP1;
end if;
when PARITY =>
state <= STOP1; state <= STOP1;
when STOP1 => when STOP1 =>
@ -117,7 +104,7 @@ begin
end if; end if;
end process; end process;
tnext <= '1' & temp(12 downto 1); tnext <= '1' & temp(11 downto 1);
ocReady <= '1' when state = WAITING else ocReady <= '1' when state = WAITING else
'0'; '0';

20
src/UART/SenderAndFifo.vhd
View File

@ -32,8 +32,6 @@ entity SenderAndFifo is
icSend : in std_logic; --! signal description add data <idDataSend> to Fifo (Enable Signal) icSend : in std_logic; --! signal description add data <idDataSend> to Fifo (Enable Signal)
idDataSend : in std_logic_vector(7 downto 0); --! signal description data to be added to the Fifo idDataSend : in std_logic_vector(7 downto 0); --! signal description data to be added to the Fifo
idParity : in std_logic; --! signal description the parity bit for the data
icEnableParity: in std_logic; --! signal description enable the sending of the parity bit
ocSEmpty : out std_logic; --! signal description indicates that Fifo is empty ocSEmpty : out std_logic; --! signal description indicates that Fifo is empty
ocSFull : out std_logic; --! signal description indicates that Fifo is full ocSFull : out std_logic; --! signal description indicates that Fifo is full
ocSAlmostE : out std_logic; --! signal description indicates that Fifo is empty to half full ocSAlmostE : out std_logic; --! signal description indicates that Fifo is empty to half full
@ -51,8 +49,6 @@ architecture arch of SenderAndFifo is
iReset : in STD_LOGIC; iReset : in STD_LOGIC;
icSend : in STD_LOGIC; icSend : in STD_LOGIC;
idData : in STD_LOGIC_VECTOR (7 downto 0); idData : in STD_LOGIC_VECTOR (7 downto 0);
idParity : in std_logic;
icEnableParity:in std_logic;
odTransmit : out STD_LOGIC; odTransmit : out STD_LOGIC;
ocReady : out STD_LOGIC; ocReady : out STD_LOGIC;
ocSyn : out STD_LOGIC); ocSyn : out STD_LOGIC);
@ -68,8 +64,8 @@ architecture arch of SenderAndFifo is
iClkRead : in std_logic; iClkRead : in std_logic;
icReadEn : in std_logic; icReadEn : in std_logic;
idDataIn : in std_logic_vector(8 downto 0); idDataIn : in std_logic_vector(7 downto 0);
odDataOut : out std_logic_vector(8 downto 0); odDataOut : out std_logic_vector(7 downto 0);
ocEmpty : out std_logic; ocEmpty : out std_logic;
ocFull : out std_logic; ocFull : out std_logic;
@ -82,7 +78,7 @@ architecture arch of SenderAndFifo is
signal scSenderRead : std_logic; signal scSenderRead : std_logic;
signal scSenderReadEn : std_logic; signal scSenderReadEn : std_logic;
signal sdDataToSend : STD_LOGIC_VECTOR (8 downto 0); signal sdDataToSend : STD_LOGIC_VECTOR (7 downto 0);
signal scSenderEmpty : std_logic; signal scSenderEmpty : std_logic;
signal scSenderFull : std_logic; signal scSenderFull : std_logic;
signal scSenderAEmpty : std_logic; signal scSenderAEmpty : std_logic;
@ -97,8 +93,6 @@ architecture arch of SenderAndFifo is
signal seSend : std_logic; signal seSend : std_logic;
signal sdFifoDataIn : std_logic_vector(8 downto 0);
begin begin
scSenderReadEn <= scSenderRead and ieBaudClkEn; scSenderReadEn <= scSenderRead and ieBaudClkEn;
@ -114,7 +108,7 @@ begin
iClkRead => iSysClk, iClkRead => iSysClk,
icReadEn => scSenderReadEn, icReadEn => scSenderReadEn,
idDataIn => sdFifoDataIn, idDataIn => idDataSend,
odDataOut => sdDataToSend, odDataOut => sdDataToSend,
ocEmpty => scSenderEmpty, ocEmpty => scSenderEmpty,
@ -124,8 +118,6 @@ begin
ocAlmostF => scSenderAFull ocAlmostF => scSenderAFull
); );
sdFifoDataIn <= idDataSend & idParity;
ocSEmpty <= scSenderEmpty; ocSEmpty <= scSenderEmpty;
ocSFull <= scSenderFull; ocSFull <= scSenderFull;
ocSAlmostE <= scSenderAEmpty; ocSAlmostE <= scSenderAEmpty;
@ -137,9 +129,7 @@ begin
ieBaudClkEn => ieBaudClkEn, ieBaudClkEn => ieBaudClkEn,
iReset => iReset, iReset => iReset,
icSend => scSenderSendReq, icSend => scSenderSendReq,
idData => sdDataToSend(8 downto 1), idData => sdDataToSend,
idParity => sdDataToSend(0),
icEnableParity=>icEnableParity,
odTransmit => odTransmit, odTransmit => odTransmit,
ocReady => scSenderReady, ocReady => scSenderReady,
ocSyn => scSyn ocSyn => scSyn

13
src/UART/UART.vhd
View File

@ -29,10 +29,9 @@ entity UART is
iReset : in std_logic; iReset : in std_logic;
icBaudLExt : in integer := 0; icBaudLExt : in integer := 0;
icEnableParity : in std_logic := '0';
icSend : in std_logic; icSend : in std_logic;
idDataSend : in std_logic_vector(7 downto 0); idDataSend : in std_logic_vector(7 downto 0);
idParity : in std_logic := '0';
ocSEmpty : out std_logic; ocSEmpty : out std_logic;
ocSFull : out std_logic; ocSFull : out std_logic;
ocSAlmostE : out std_logic; ocSAlmostE : out std_logic;
@ -41,7 +40,6 @@ entity UART is
odTransmit : out std_logic; odTransmit : out std_logic;
odDataRcvd : out std_logic_vector(7 downto 0); odDataRcvd : out std_logic_vector(7 downto 0);
odParity : out std_logic;
ocREmpty : out std_logic; ocREmpty : out std_logic;
ocRFull : out std_logic; ocRFull : out std_logic;
ocRAlmostE : out std_logic; ocRAlmostE : out std_logic;
@ -92,10 +90,9 @@ architecture arch of UART is
ieClkEn : in std_logic; ieClkEn : in std_logic;
ieBaudClkEn : in std_logic; ieBaudClkEn : in std_logic;
iReset : in std_logic; iReset : in std_logic;
icSend : in std_logic; icSend : in std_logic;
idDataSend : in std_logic_vector(7 downto 0); idDataSend : in std_logic_vector(7 downto 0);
idParity : in std_logic;
icEnableParity : in std_logic;
ocSEmpty : out std_logic; ocSEmpty : out std_logic;
ocSFull : out std_logic; ocSFull : out std_logic;
ocSAlmostE : out std_logic; ocSAlmostE : out std_logic;
@ -113,8 +110,6 @@ architecture arch of UART is
iReset : in std_logic; iReset : in std_logic;
odDataRcvd : out std_logic_vector(7 downto 0); odDataRcvd : out std_logic_vector(7 downto 0);
odParity : out std_logic;
icEnableParity:in std_logic;
ocREmpty : out std_logic; ocREmpty : out std_logic;
ocRFull : out std_logic; ocRFull : out std_logic;
ocRAlmostE : out std_logic; ocRAlmostE : out std_logic;
@ -194,9 +189,7 @@ end generate;
iReset => iReset, iReset => iReset,
icSend => icSend, icSend => icSend,
icEnableParity=> icEnableParity,
idDataSend => idDataSend, idDataSend => idDataSend,
idParity => idParity,
ocSEmpty => ocSEmpty, ocSEmpty => ocSEmpty,
ocSFull => ocSFull, ocSFull => ocSFull,
ocSAlmostE => ocSAlmostE, ocSAlmostE => ocSAlmostE,
@ -212,9 +205,7 @@ end generate;
ie4xBaudClkEn => se4BaudReceiver, ie4xBaudClkEn => se4BaudReceiver,
iReset => iReset, iReset => iReset,
icEnableParity=>icEnableParity,
odDataRcvd => odDataRcvd, odDataRcvd => odDataRcvd,
odParity => odParity,
ocREmpty => ocREmpty, ocREmpty => ocREmpty,
ocRFull => ocRFull, ocRFull => ocRFull,
ocRAlmostE => ocRAlmostE, ocRAlmostE => ocRAlmostE,

72
src/clkDivider.vhd Normal file
View File

@ -0,0 +1,72 @@
--------------------------------------------------------------------------------
-- Entity: clkDivider
--------------------------------------------------------------------------------
-- Copyright ... 2011
-- Filename : clkDivider.vhd
-- Creation date : 2011-05-25
-- Author(s) : marcel
-- Version : 1.00
-- Description : generates a clock frequency <GEN_FreqOut_Hz> based on
-- input freuency <GEN_FreqOut_Hz>
-- Attention: avoid "strange" samples as 3:2
--------------------------------------------------------------------------------
-- File History:
-- Date Version Author Comment
-- unknown 0.10 marcel Creation of File
-- 2011-05-25 1.00 marcel GENERICs added
--------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
--! brief
--! generates a clock frequency <GEN_FreqOut_Hz> based on
--! input freuency <GEN_FreqOut_Hz>
--! Generics can also be used to define ratio (like 4 (IN) : 1(Out))
--! Attention: avoid "strange" ratios (like 3:2)
--! detailed
--! see brief
entity clkDivider is
generic(
GEN_FreqIn_Hz : integer := 200000000; --! signal description input clock frequency in Hz for <iClk_in>
GEN_FreqOut_Hz : integer := 100000000 --! signal description output clock frequency in Hz for <oClk_out>
);
port (
iClk_in : in STD_LOGIC; --! signal description input clock
iReset : in STD_LOGIC; --! signal description asynchronous reset (can be tied to '0')
oClk_out : out STD_LOGIC --! signal description output clock
);
end clkDivider;
architecture Behavioral of clkDivider is
constant cLimit : integer := GEN_FreqIn_Hz / (2 * GEN_FreqOut_Hz);
signal sCounter : integer := 0;
signal sClk_out : STD_LOGIC := '0';
begin
process (iClk_in, iReset)
begin
if (iReset = '1') then
sCounter <= 0;
sClk_out <= '0';
elsif (rising_edge(iClk_in)) then
if (sCounter = (cLimit-1)) then
sCounter <= 0;
sClk_out <= not sClk_out;
else
sCounter <= sCounter + 1;
end if;
end if;
end process;
oClk_out <= sClk_out;
end Behavioral;

2
src/cpupkg.vhd
View File

@ -8,7 +8,7 @@ library IEEE;
use IEEE.STD_LOGIC_1164.all; use IEEE.STD_LOGIC_1164.all;
package cpupkg is package cpupkg is
type OPTYPE is (shl, shr, sto, loa, li, add, sub, addc, subc, opor, opand, opxor, opnot, jpz, jpc, jmp, hlt); type OPTYPE is (jmc, shl, shr, sto, loa, li, add, sub, addc, subc, opor, opand, opxor, opnot, jpz, jpc, jmp, hlt, ret);
subtype DATA is std_logic_vector(31 downto 0); subtype DATA is std_logic_vector(31 downto 0);
subtype ADDRESS is std_logic_vector(15 downto 0); subtype ADDRESS is std_logic_vector(15 downto 0);