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Rémi Heredero
2021-11-24 10:50:51 +01:00
commit c7ba678fbb
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54
Libs/Memory/hdl/bramDualportWritefirst_bhv.vhd Normal file
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USE std.textio.all;
ARCHITECTURE bhv OF bramDualportWritefirst IS
-- Define ramContent type
type ramContentType is array(0 to (2**addressBitNb)-1) of bit_vector(dataBitNb-1 DOWNTO 0);
-- Define function to create initvalue signal
impure function ReadRamContentFromFile(ramContentFilenAme : in string) return ramContentType is
FILE ramContentFile : text is in ramContentFilenAme;
variable ramContentFileLine : line;
variable ramContent : ramContentType;
begin
for i in ramContentType'range loop
readline(ramContentFile, ramContentFileLine);
read(ramContentFileLine, ramContent(i));
end loop;
return ramContent;
end function;
-- Declare ramContent signal
shared variable ramContent: ramContentType := ReadRamContentFromFile(initFile);
BEGIN
-- Port A
process(clockA)
begin
if clockA'event and clockA='1' then
if enA = '1' then
if writeEnA = '1' then
dataOutA <= dataInA;
ramContent(to_integer(unsigned(addressA))) := to_bitvector(dataInA,'0');
else
dataOutA <= to_stdulogicvector(ramContent(to_integer(unsigned(addressA))));
end if;
end if;
end if;
end process;
-- Port B
process(clockB)
begin
if clockB'event and clockB='1' then
if enB = '1' then
-- if writeEnB = '1' then
-- ramContent(to_integer(unsigned(addressB))) := to_bitvector(dataInB,'0');
-- dataOutB <= dataInB;
-- else
dataOutB <= to_stdulogicvector(ramContent(to_integer(unsigned(addressB))));
-- end if;
end if;
end if;
end process;
END ARCHITECTURE bhv;

39
Libs/Memory/hdl/bram_bhv.vhd Normal file
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USE std.textio.all;
ARCHITECTURE bhv OF bram IS
-- Define ramContent type
type ramContentType is array(0 to (2**addressBitNb)-1) of bit_vector(dataBitNb-1 DOWNTO 0);
-- Define function to create initvalue signal
impure function ReadRamContentFromFile(ramContentFilenAme : in string) return ramContentType is
FILE ramContentFile : text is in ramContentFilenAme;
variable ramContentFileLine : line;
variable ramContent : ramContentType;
begin
for i in ramContentType'range loop
readline(ramContentFile, ramContentFileLine);
read(ramContentFileLine, ramContent(i));
end loop;
return ramContent;
end function;
-- Declare ramContent signal
shared variable ramContent: ramContentType := ReadRamContentFromFile(initFile);
BEGIN
-- Port A
process(clock)
begin
if clock'event and clock='1' then
if en = '1' then
if writeEn = '1' then
dataOut <= dataIn;
ramContent(to_integer(unsigned(addressIn))) := to_bitvector(dataIn,'0');
else
dataOut <= to_stdulogicvector(ramContent(to_integer(unsigned(addressIn))));
end if;
end if;
end if;
end process;
END ARCHITECTURE bhv;

55
Libs/Memory/hdl/bram_dualport_writefirst.vhd Normal file
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USE std.textio.all;
ARCHITECTURE bhv OF bramContentDualportWritefirst IS
-- Define ramContent type
type ramContentType is array(0 to (2**addr_bit_nb)-1) of bit_vector(data_bit_nb-1 DOWNTO 0);
-- Define function to create initvalue signal
impure function ReadRamContentFromFile(ramContentFilenAme : in string) return ramContentType is
FILE ramContentFile : text is in ramContentFilenAme;
variable ramContentFileLine : line;
variable ramContent : ramContentType;
begin
for i in ramContentType'range loop
readline(ramContentFile, ramContentFileLine);
read(ramContentFileLine, ramContent(i));
end loop;
return ramContent;
end function;
-- Declare ramContent signal
shared variable ramContent: ramContentType := ReadRamContentFromFile(init_file);
BEGIN
-- Port A
process(clockA)
begin
if clockA'event and clockA='1' then
if enA = '1' then
if writeEnA = '1' then
dataOutA <= dataInA;
ramContent(to_integer(unsigned(addressA))) := to_bitvector(dataInA,'0');
else
dataOutA <= to_stdulogicvector(ramContent(to_integer(unsigned(addressA))));
end if;
end if;
end if;
end process;
-- Port B
process(clockB)
begin
if clockB'event and clockB='1' then
if enB = '1' then
if writeEnB = '1' then
ramContent(to_integer(unsigned(addressB))) := to_bitvector(dataInB,'0');
dataOutB <= dataInB;
else
dataOutB <= to_stdulogicvector(ramContent(to_integer(unsigned(addressB))));
end if;
end if;
end if;
end process;
END ARCHITECTURE bhv;

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Libs/Memory/hdl/fifoBridgeRxToTxBuswidthAdaptionRxbigger_behavioral.vhd Normal file
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-- ------------------------------------------------------------------------------
-- Copyright 2013 HES-SO Valais Wallis (www.hevs.ch)
-- ------------------------------------------------------------------------------
-- FIFO bridge with bus width adaption
-- A shift register that connects two FIFOs with different bus width.
-- Many IP blocks nowadays have FIFO or FIFO-like interfaces and often they
-- have to be connected. This block can the be used for this task, even if
-- the bus size of the two FIFO interfaces is different.
-- The Rx side bus width has to be a multiple of the Tx side bus width.
--
-- Created on 2013-10-18
--
-- Author: Oliver A. Gubler (oliver.gubler@hevs.ch)
--
-- 2014-10-06: *modify introduction text
-- +add some comment
-- *change readRx to a pulse
-- *fix bug on shift of shiftreg_s
-- 2013-10-18: +intital release
-- ------------------------------------------------------------------------------
--
library Common;
use Common.CommonLib.all;
ARCHITECTURE behavioral OF fifoBridgeRxToTxBusWidthAdaptionRxBigger IS
signal cnt_s: unsigned(requiredBitNb(dataBitNbRx)-1 downto 0);
signal shiftreg_s: std_ulogic_vector(dataBitNbRx-1 downto 0);
signal emptyRx_s: std_ulogic; -- internal empty signal
signal writeTx_s: std_ulogic; -- internal write signal
constant ratio_rxtx_c: positive range 1 to dataBitNbRx/dataBitNbTx:= dataBitNbRx/dataBitNbTx;
BEGIN
rx0: process(clock, reset)
begin
if reset = '1' then
shiftreg_s <= (others => '0');
emptyRx_s <= '1';
cnt_s <= (others => '0');
writeTx_s <= '0';
dataTx <= (others => '0');
readRx <= '0';
elsif rising_edge(clock) then
writeTx_s <= '0';
readRx <= '0';
-- fetch data
if emptyRx_s = '1' and emptyRx = '0' then
emptyRx_s <= '0';
shiftreg_s <= dataRx;
readRx <= '1';
end if;
-- shift data and put out
-- after each write, wait one cylce to check if full gets high
if emptyRx_s = '0' and fullTx = '0' and writeTx_s = '0' then
shiftreg_s <= shiftreg_s(dataBitNbRx-dataBitNbTx-1 downto 0) & std_ulogic_vector(to_unsigned(0,dataBitNbTx));
dataTx <= shiftreg_s(dataBitNbRx-1 downto dataBitNbRx-dataBitNbTx);
writeTx_s <= '1';
cnt_s <= cnt_s +1;
if cnt_s >= ratio_rxtx_c-1 then
cnt_s <= (others => '0');
emptyRx_s <= '1';
end if;
end if;
end if;
end process;
writeTx <= writeTx_s;
END ARCHITECTURE behavioral;

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Libs/Memory/hdl/fifoBridgeRxToTxBuswidthAdaptionTxbigger_behavioral.vhd Normal file
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-- ------------------------------------------------------------------------------
-- Copyright 2013 HES-SO Valais Wallis (www.hevs.ch)
-- ------------------------------------------------------------------------------
-- FIFO bridge with bus width adaption
-- A shift register that connects two FIFOs with different bus width.
-- Many IP blocks nowadays have FIFO or FIFO-like interface. But the bus width
-- varies often. This block can the be used to adapt the bus width to your own
-- needs.
-- The Tx side bus width has to be a multiple of the Rx side bus width.
--
-- Created on 2013-10-21
--
-- Version: 1.0
-- Author: Oliver A. Gubler (oliver.gubler@hevs.ch)
-- ------------------------------------------------------------------------------
--
library common;
use common.commonlib.all;
ARCHITECTURE behavioral OF fifoBridgeRxToTxBusWidthAdaptionTxbigger IS
constant ratio_txrx_c: positive range 1 to dataBitNbTx/dataBitNbRx:= dataBitNbTx/dataBitNbRx;
signal cnt_s: unsigned(requiredBitNb(ratio_txrx_c-1)-1 downto 0);
signal shiftreg_s: std_ulogic_vector(dataBitNbTx-1 downto 0);
signal fullTx_s: std_ulogic;
signal emptyRx_s: std_ulogic;
BEGIN
rx0: process(clock, reset)
begin
if reset = '1' then
shiftreg_s <= (others => '0');
readRx <= '1';
emptyRx_s <= '1';
cnt_s <= (others => '0');
elsif rising_edge(clock) then
readRx <= NOT fullTx_s;
emptyRx_s <= '1';
if emptyRx = '0' and fullTx_s = '0' then
-- shiftreg_s(((to_integer(cnt_s)+1)*dataBitNbRx)-1 downto to_integer(cnt_s)*dataBitNbRx) <= dataRx;
shiftreg_s <= shiftreg_s(dataBitNbTx-dataBitNbRx-1 downto 0) & dataRx;
readRx <= '1';
cnt_s <= cnt_s +1;
if cnt_s >= ratio_txrx_c-1 then
cnt_s <= (others => '0');
emptyRx_s <= '0';
end if;
end if;
end if;
end process;
tx0: process(clock, reset)
begin
if reset = '1' then
fullTx_s <= '1';
writeTx <= '0';
dataTx <= (others => '0');
elsif rising_edge(clock) then
fullTx_s <= fullTx;
writeTx <= '0';
-- no need to wait to check for full (in contrast to RxBigger)
-- because it will forcibly take several clocks to fill the shiftreg
if emptyRx_s = '0' and fullTx = '0' then
dataTx <= shiftreg_s;
writeTx <= '1';
end if;
end if;
end process;
END ARCHITECTURE behavioral;

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library Common;
use Common.CommonLib.all;
architecture RTL of FIFO_bram is
subtype register_type is std_ulogic_vector(dataIn'high downto 0);
type memory_type is array (0 to depth-1) of register_type;
signal writeCounter: unsigned(requiredBitNb(depth-1)-1 downto 0);
signal readCounter: unsigned(writeCounter'range);
signal memoryArray: memory_type;
type fifoStateType is (
sEmpty, sFull,
sRead, sWrite, sWriteFirst,
sReadWrite, sWait
);
signal fifoState: fifoStateType;
signal emptyCondition, fullCondition, empty_int: std_ulogic;
begin
------------------------------------------------------------------------------
-- read and write counters
updateWriteCounter: process(reset, clock)
begin
if reset = '1' then
writeCounter <= (others => '0');
elsif rising_edge(clock) then
if (write = '1') and (fullCondition = '0') then
writeCounter <= writeCounter + 1;
end if;
end if;
end process updateWriteCounter;
updateReadCounter: process(reset, clock)
begin
if reset = '1' then
readCounter <= (others => '0');
elsif rising_edge(clock) then
if (read = '1') and (empty_int = '0') then
readCounter <= readCounter + 1;
end if;
end if;
end process updateReadCounter;
------------------------------------------------------------------------------
-- memory access
writeMem: process(clock)
begin
if rising_edge(clock) then
if (write = '1') and (fullCondition = '0') then
memoryArray(to_integer(writeCounter)) <= dataIn;
end if;
end if;
end process writeMem;
readMem: process(reset, clock)
begin
if reset = '1' then
dataOut <= (others => '0');
elsif rising_edge(clock) then
if (read = '0') or (empty_int = '1') then
dataOut <= memoryArray(to_integer(readCounter));
else
dataOut <= memoryArray(to_integer(readCounter+1));
end if;
end if;
end process readMem;
------------------------------------------------------------------------------
-- controls
emptyCondition <= '1' when
( (fifoState = sRead) and (writeCounter = readCounter) ) or
(fifoState = sEmpty)
else '0';
fullCondition <= '1' when
( (fifoState = sWrite) and (writeCounter = readCounter) ) or
(fifoState = sFull)
else '0';
fifoControl: process(reset, clock)
begin
if reset = '1' then
fifoState <= sEmpty;
elsif rising_edge(clock) then
case fifoState is
when sEmpty =>
if write = '1' then
fifoState <= sWriteFirst;
end if;
when sFull =>
if (read = '1') then
fifoState <= sRead;
end if;
when sRead =>
if (read = '1') and (write = '1') then
fifoState <= sReadWrite;
elsif write = '1' then
fifoState <= sWrite;
elsif emptyCondition = '1' then
fifoState <= sEmpty;
elsif read = '1' then
fifoState <= sRead;
else
fifoState <= sWait;
end if;
when sWriteFirst =>
if (read = '1') and (write = '1') then
fifoState <= sReadWrite;
elsif write = '1' then
fifoState <= sWrite;
elsif read = '1' then
fifoState <= sRead;
else
fifoState <= sWait;
end if;
when sWrite =>
if (read = '1') and (write = '1') then
fifoState <= sReadWrite;
elsif read = '1' then
fifoState <= sRead;
elsif fullCondition = '1' then
fifoState <= sFull;
elsif write = '1' then
fifoState <= sWrite;
else
fifoState <= sWait;
end if;
when sReadWrite =>
if (read = '0') and (write = '0') then
fifoState <= sWait;
elsif (read = '1') and (write = '0') then
fifoState <= sRead;
elsif (write = '1') and (read = '0') then
fifoState <= sWrite;
end if;
when sWait =>
if (read = '1') and (write = '1') then
fifoState <= sReadWrite;
elsif read = '1' then
fifoState <= sRead;
elsif write = '1' then
fifoState <= sWrite;
end if;
when others => null;
end case;
end if;
end process fifoControl;
full <= '1' when
(fifoState = sFull) or
(fullCondition = '1')
else '0';
empty_int <= '1' when
(fifoState = sEmpty) or
(fifoState = sWriteFirst) or
( (emptyCondition = '1') and (fifoState = sRead) )
else '0';
empty <= empty_int;
end RTL;

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Libs/Memory/hdl/fifo_minimal.vhd Normal file
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library Common;
use Common.CommonLib.all;
architecture minimal of FIFO_bram is
subtype register_type is std_ulogic_vector(dataIn'high downto 0);
type memory_type is array (0 to depth-1) of register_type;
signal writeCounter: unsigned(requiredBitNb(depth)-1 downto 0);
signal readCounter: unsigned(writeCounter'range);
signal memoryArray : memory_type;
begin
updateWriteCounter: process(reset, clock)
begin
if reset = '1' then
writeCounter <= (others => '0');
elsif rising_edge(clock) then
if write = '1' then
writeCounter <= writeCounter + 1;
end if;
end if;
end process updateWriteCounter;
updateReadCounter: process(reset, clock)
begin
if reset = '1' then
readCounter <= (others => '0');
elsif rising_edge(clock) then
if read = '1' then
readCounter <= readCounter + 1;
end if;
end if;
end process updateReadCounter;
writeMem: process(clock)
begin
if rising_edge(clock) then
if write = '1' then
memoryArray(to_integer(writeCounter)) <= dataIn;
end if;
end if;
end process writeMem;
dataOut <= memoryArray(to_integer(readCounter));
checkStatus: process(readCounter, writeCounter)
begin
if readCounter = writeCounter then
empty <= '1';
else
empty <= '0';
end if;
if writeCounter+1 = readCounter then
full <= '1';
else
full <= '0';
end if;
end process checkStatus;
end minimal;

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Libs/Memory/hdl/fifo_oneRegister_rtl.vhd Normal file
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architecture oneRegister of FIFO_oneRegister is
signal dataRegister: std_ulogic_vector(dataIn'range);
begin
writeReg: process(reset, clock)
begin
if reset = '1' then
dataRegister <= (others => '0');
elsif rising_edge(clock) then
if write = '1' then
dataRegister <= dataIn;
end if;
end if;
end process writeReg;
dataOut <= dataRegister;
manageFlags: process(reset, clock)
begin
if reset = '1' then
empty <= '1';
full <= '0';
elsif rising_edge(clock) then
if write = '1' then
empty <= '0';
full <= '1';
elsif read = '1' then
empty <= '1';
full <= '0';
end if;
end if;
end process manageFlags;
end oneRegister;

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Libs/Memory/hdl/fifo_pim.vhd Normal file
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library Common;
use Common.CommonLib.all;
architecture pim of FIFO_bram is
type mem_t is array (depth-1 downto 0) of std_ulogic_vector(dataIn'range);
subtype mem_range_r is natural range requiredBitNb(depth)-1 downto 0;
subtype ptr_range_r is natural range requiredBitNb(depth)+1-1 downto 0;
signal mem : mem_t := (others => (others => '0'));
signal full_int : std_logic;
signal empty_int : std_logic;
signal write_error : std_logic;
signal read_error : std_logic;
signal read_ptr : unsigned(ptr_range_r);
signal read_ptr_next : unsigned(ptr_range_r);
signal write_ptr : unsigned(ptr_range_r);
signal write_ptr_next : unsigned(ptr_range_r);
signal used_int : unsigned(ptr_range_r);
begin
-----------------------------------------------------------------------------
-- Free / used
-----------------------------------------------------------------------------
fifo_count_proc: process(reset, clock)
begin
if reset = '1' then
used_int <= (others => '0');
elsif rising_edge(clock) then
if write = '1' and full_int = '0' then
used_int <= used_int + 1;
end if;
if read = '1' and empty_int = '0' then
used_int <= used_int - 1;
end if;
-- Simultaneous read/write -> no change
-- ignore full_int, since it is valid
if write = '1' and read = '1' and empty_int = '0' then
used_int <= used_int;
end if;
end if;
end process;
-----------------------------------------------------------------------------
-- FIFO status
-----------------------------------------------------------------------------
full_int <= '1' when (write_ptr(write_ptr'left) /= read_ptr(read_ptr'left))
and ((write_ptr(mem_range_r) = read_ptr(mem_range_r)))
else '0';
empty_int <= '1' when (write_ptr = read_ptr) else '0';
full <= full_int;
empty <= empty_int;
write_ptr_next <= write_ptr + 1;
read_ptr_next <= read_ptr + 1;
-----------------------------------------------------------------------------
-- FIFO pointers
-----------------------------------------------------------------------------
fifo_ptr_proc: process(reset, clock)
begin
if reset = '1' then
write_ptr <= (others => '0');
read_ptr <= (others => '0');
write_error <= '0';
read_error <= '0';
elsif rising_edge(clock) then
write_error <= '0';
read_error <= '0';
if write = '1' then
if full_int = '0' or read = '1' then
write_ptr <= write_ptr_next;
else
write_error <= '1';
end if;
end if;
if read = '1' then
if empty_int = '0' then
read_ptr <= read_ptr_next;
else
read_error <= '1';
end if;
end if;
end if;
end process;
-----------------------------------------------------------------------------
-- FIFO RAM
-----------------------------------------------------------------------------
fifo_out_proc : process(clock)
begin
if rising_edge(clock) then
dataOut <= mem(to_integer(read_ptr(mem_range_r)));
end if;
end process;
fifo_in_proc : process(clock)
begin
if rising_edge(clock) then
if write = '1' and full_int = '0' then
mem(to_integer(write_ptr(mem_range_r))) <= dataIn;
end if;
end if;
end process;
end pim;

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Libs/Memory/hdl/fifo_rtl_minimal.vhd Normal file
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--
-- VHDL Architecture Memory.fifo_minimal
--
-- Created:
-- by - uadmin.UNKNOWN (WE3877)
-- at - 13:54:33 11.07.2012
--
-- using Mentor Graphics HDL Designer(TM) 2009.2 (Build 10)
--
library Common;
use Common.CommonLib.all;
architecture RTL_minimal of FIFO is
subtype register_type is std_ulogic_vector(dataIn'high downto 0);
type memory_type is array (0 to depth-1) of register_type;
signal writeCounter: unsigned(requiredBitNb(depth)-1 downto 0);
signal readCounter: unsigned(writeCounter'range);
signal memoryArray : memory_type;
begin
updateWriteCounter: process(reset, clock)
begin
if reset = '1' then
writeCounter <= (others => '0');
elsif rising_edge(clock) then
if write = '1' then
writeCounter <= writeCounter + 1;
end if;
end if;
end process updateWriteCounter;
updateReadCounter: process(reset, clock)
begin
if reset = '1' then
readCounter <= (others => '0');
elsif rising_edge(clock) then
if read = '1' then
readCounter <= readCounter + 1;
end if;
end if;
end process updateReadCounter;
writeMem: process(clock)
begin
if rising_edge(clock) then
if write = '1' then
memoryArray(to_integer(writeCounter)) <= dataIn;
end if;
end if;
end process writeMem;
dataOut <= memoryArray(to_integer(readCounter));
-- checkStatus: process(reset, clock)
-- begin
-- if reset = '1' then
-- empty <= '1';
-- full <= '0';
-- elsif rising_edge(clock) then
-- if readCounter+1 = writeCounter then
-- if read = '1' then
-- empty <= '1';
-- end if;
-- elsif writeCounter = readCounter then
-- if write = '1' then
-- empty <= '0';
-- end if;
-- if read = '1' then
-- full <= '0';
-- end if;
-- elsif writeCounter+1 = readCounter then
-- if write = '1' then
-- full <= '1';
-- end if;
-- end if;
-- end if;
-- end process checkStatus;
checkStatus: process(readCounter, writeCounter)
begin
if readCounter = writeCounter then
empty <= '1';
else
empty <= '0';
end if;
if writeCounter+1 = readCounter then
full <= '1';
else
full <= '0';
end if;
end process checkStatus;
END ARCHITECTURE RTL_minimal;

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Libs/Memory/hdl/fifobridgerxtotx_rtl.vhd Normal file
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-- ------------------------------------------------------------------------------
-- Copyright 2012 HES-SO Valais Wallis (www.hevs.ch)
-- ------------------------------------------------------------------------------
-- FIFO bridge with bus width adaptation
-- A register that connects two FIFOs.
-- Many IP blocks nowadays have FIFO or FIFO-like interfaces and often they
-- have to be connected. This block can the be used for this task.
--
-- Created on 2012
--
-- Author: Oliver A. Gubler (oliver.gubler@hevs.ch)
--
-- 2016-04-01: fix bug in FWFT read when full
-- 2016-03-22: +add FirstWordFallThrough (FWFT) generic
-- 2012: +intital release
-- ------------------------------------------------------------------------------
--
ARCHITECTURE RTL OF fifoBridgeRxToTx IS
signal read1: std_ulogic;
signal read2: std_ulogic;
signal read: std_ulogic;
signal storedData: std_ulogic_vector(data1'range);
signal write: std_ulogic;
BEGIN
readControl: process(reset, clock)
begin
if reset = '1' then
read1 <= '0';
read2 <= '0';
elsif rising_edge(clock) then
if (empty1 = '0') and (full2 = '0') then
read1 <= '1';
else
read1 <= '0';
end if;
read2 <= read1;
end if;
end process readControl;
read <= not empty1 and not full2 when firstWordFallThrough
else not empty1 and read1;
rd1 <= read;
readData: process(reset, clock)
begin
if reset = '1' then
storedData <= (others => '0');
elsif rising_edge(clock) then
if firstWordFallThrough then
storedData <= data1;
else
if read = '1' then
storedData <= data1;
end if;
end if;
end if;
end process readData;
data2 <= storedData;
writeControl: process(reset, clock)
begin
if reset = '1' then
write <= '0';
elsif rising_edge(clock) then
if firstWordFallThrough then
write <= not empty1 and not full2;
else
if read = '1' then
write <= '1';
else
write <= '0';
end if;
end if;
end if;
end process writeControl;
wr2 <= write;
end RTL;

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Libs/Memory/hdl/flashController_RTL.vhd Normal file
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ARCHITECTURE RTL OF flashController IS
signal addressReg: unsigned(flashAddr'range);
signal dataOutReg: std_ulogic_vector(flashDataOut'range);
signal dataInReg: std_ulogic_vector(flashDataIn'range);
type sequenceStateType is (
idle,
waitForBus1, waitForBus0,
startAccess, waitAcccessEnd
);
signal sequenceState: sequenceStateType;
signal read: std_ulogic;
signal startCounter: std_ulogic;
signal sequenceCounter: unsigned(3 downto 0);
signal endOfCount: std_ulogic;
signal readDataValid: std_ulogic;
signal flashCE: std_ulogic;
BEGIN
------------------------------------------------------------------------------
-- memory reset
memRst_n <= not '0';
------------------------------------------------------------------------------
-- address
storeAddress: process(reset, clock)
begin
if reset = '1' then
addressReg <= (others => '0');
elsif rising_edge(clock) then
if (flashRd = '1') or (flashWr = '1') then
addressReg <= shift_left(flashAddr, 1);
end if;
end if;
end process storeAddress;
memAddress <= std_ulogic_vector(addressReg);
------------------------------------------------------------------------------
-- data out
storeDataOut: process(reset, clock)
begin
if reset = '1' then
dataOutReg <= (others => '0');
elsif rising_edge(clock) then
if flashWr = '1' then
dataOutReg <= flashDataOut;
end if;
end if;
end process storeDataOut;
memDataOut <= flashDataOut;
------------------------------------------------------------------------------
-- data in
readDataValid <= '1' when (read = '1') and (endOfCount = '1') else '0';
storeDataIn: process(reset, clock)
begin
if reset = '1' then
dataInReg <= (others => '0');
elsif rising_edge(clock) then
if readDataValid = '1' then
dataInReg <= memDataIn;
end if;
end if;
end process storeDataIn;
flashDataIn <= dataInReg when readDataValid = '0' else memDataIn;
------------------------------------------------------------------------------
-- read/write sequence
busAccessFsm: process(reset, clock)
begin
if reset = '1' then
read <= '0';
sequenceState <= idle;
elsif rising_edge(clock) then
case sequenceState is
when idle =>
if flashRd = '1' then
read <= '1';
sequenceState <= waitForBus1;
elsif flashWr = '1' then
read <= '0';
sequenceState <= waitForBus1;
end if;
when waitForBus1 =>
if memBusEn_n = '1' then
sequenceState <= waitForBus0;
end if;
when waitForBus0 =>
if memBusEn_n = '0' then
sequenceState <= startAccess;
end if;
when startAccess =>
sequenceState <= waitAcccessEnd;
when waitAcccessEnd =>
if endOfCount = '1' then
sequenceState <= idle;
end if;
end case;
end if;
end process busAccessFsm;
startCounter <= '1' when sequenceState = startAccess else '0';
endOfCount <= '1'
when ( (sequenceCounter = rdWaitState) and (read = '1') ) or
( (sequenceCounter = wrWaitState) and (read = '0') )
else '0';
countSequence: process(reset, clock)
begin
if reset = '1' then
sequenceCounter <= (others => '0');
elsif rising_edge(clock) then
if sequenceCounter = 0 then
if startCounter = '1' then
sequenceCounter <= sequenceCounter + 1;
end if;
else
if endOfCount = '1' then
sequenceCounter <= (others => '0');
else
sequenceCounter <= sequenceCounter + 1;
end if;
end if;
end if;
end process countSequence;
flashCE <= '0' when sequenceCounter = 0 else '1';
flashCE_n <= not flashCE;
memWR_n <= not '1' when (read = '0') and (flashCE = '1') and (endOfCount = '0')
else not '0';
memOE_n <= not '1' when (read = '1') and (flashCE = '1') else not '0';
flashDataValid <= endOfCount;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerBuildAddress_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerBuildAddress IS
constant addressPrecharge: std_ulogic_vector(memAddress'range)
:= (10=> '1', others => '-');
constant addressModeRegU : unsigned(memAddress'range)
:= resize("0" & "00" & "010" & "0" & "000", memAddress'length);
-- ll,10 = reserved,
-- 9 = '0' programmed burst length => burst length applicable for both rd and wr
-- 8,7 = Op mode = 00 => standard operation (all other states are reserved)
-- 6,5,4 = CAS latency = 010 => cas latency of 2
-- 3 = Burst Type = '0' => Sequential (not interleaved)
-- 2,1,0 = Brust Length = 000 => brust length is 1
constant addressModeReg : std_ulogic_vector(memAddress'range)
:= std_ulogic_vector(addressModeRegU);
BEGIN
buildAddresses: process(ramAddr, addrSelPrecharge, addrSelModeReg, addrSelRow, addrSelCol)
begin
memBankAddress <= std_ulogic_vector(ramAddr(ramAddr'high downto ramAddr'high-memBankAddress'length+1));
if addrSelPrecharge = '1' then
memAddress <= addressPrecharge;
elsif addrSelModeReg = '1' then
memAddress <= addressModeReg;
elsif addrSelRow = '1' then
memAddress <= std_ulogic_vector(ramAddr(rowAddressBitNb+colAddressBitNb-1 downto colAddressBitNb));
elsif addrSelCol = '1' then
memAddress(memAddress'high downto colAddressBitNb) <= (others => '0');
memAddress(10) <= '1';
memAddress(colAddressBitNb-1 downto 0) <= std_ulogic_vector(ramAddr(colAddressBitNb-1 downto 0));
else
memAddress <= (others => '-');
end if;
end process buildAddresses;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerRefreshCounter_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerRefreshCounter IS
signal delayCounter: unsigned(delayCounterBitNb-1 downto 0);
signal endOfDelay: std_ulogic;
BEGIN
countDelay : process(reset, clock)
begin
if reset = '1' then
delayCounter <= (others => '0');
elsif rising_edge(clock) then
if endOfDelay = '1' then
delayCounter <= to_unsigned(1, delayCounter'length);
else
delayCounter <= delayCounter + 1;
end if;
end if;
end process countDelay;
findEndOfDelay: process(powerUpDone, delayCounter)
begin
endOfDelay <= '0';
if powerUpDone = '0' then
if delayCounter+1 = 0 then
endOfDelay <= '1';
end if;
else
if delayCounter+1 >= refreshPeriodNb then
endOfDelay <= '1';
end if;
end if;
end process findEndOfDelay;
endOfRefreshCount <= endOfDelay;
signalRefresh: process(powerUpDone, delayCounter)
begin
selectRefresh <= '0';
if (powerUpDone = '1') and (delayCounter < 1024) then
if (delayCounter <= 16) or (delayCounter(3 downto 0) = 0) then
selectRefresh <= '1';
end if;
end if;
end process signalRefresh;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerSR_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerSR IS
BEGIN
setReset: process(reset, clock)
begin
if reset = '1' then
flag <= '0';
elsif rising_edge(clock) then
if setFlag = '1' then
flag <= '1';
elsif resetFlag = '1' then
flag <= '0';
end if;
end if;
end process setReset;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerSampleDataIn_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerSampleDataIn IS
BEGIN
sampleRamData: process(reset, clock)
begin
if reset = '1' then
ramDataIn <= (others => '0');
elsif falling_edge(clock) then
if sampleData = '1' then
ramDataIn <= memDataIn;
end if;
end if;
end process sampleRamData;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerStoreData_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerStoreData IS
BEGIN
storeData : process(reset, clock)
begin
if reset = '1' then
memDataOut <= (others => '0');
elsif rising_edge(clock) then
memDataOut <= ramDataOut;
end if;
end process storeData;
END ARCHITECTURE RTL;

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Libs/Memory/hdl/sdramControllerTimingsShiftRegister_RTL.vhd Normal file
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ARCHITECTURE RTL OF sdramControllerTimingsShiftRegister IS
--constant leadingZeroesNb: positive := 2;
--constant leadingZeroes: std_ulogic_vector(1 to leadingZeroesNb) := (others => '0');
--signal shiftReg: std_ulogic_vector(1 to timerDone'high-leadingZeroesNb);
signal shiftReg: std_ulogic_vector(1 to timerDone'high);
BEGIN
shiftToken : process(reset, clock)
begin
if reset = '1' then
shiftReg <= (others => '0');
elsif rising_edge(clock) then
shiftReg(1) <= timerStart;
shiftReg(2 to shiftReg'right) <= shiftReg(1 to shiftReg'right-1);
end if;
end process shiftToken;
--timerDone <= leadingZeroes & shiftReg;
timerDone <= shiftReg;
END ARCHITECTURE RTL;

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INCLUDE list {
DEFAULT atom 1
}
DIALECT atom VHDL_2008

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INCLUDE list {
DEFAULT atom 1
}
DIALECT atom VHDL_2008

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}
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DEFAULT atom 1
}

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INCLUDE list {
DEFAULT atom 1
}
DIALECT atom VHDL_2008

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INCLUDE list {
DEFAULT atom 1
}
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INCLUDE list {
DEFAULT atom 1
}
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DEFAULT atom 1
}
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INCLUDE list {
DEFAULT atom 1
}
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INCLUDE list {
DEFAULT atom 1
}
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INCLUDE list {
DEFAULT atom 1
}
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TOP_MARKER atom 0

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DEFAULT_ARCHITECTURE atom RTL
DEFAULT_FILE atom flashController_RTL.vhd

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DEFAULT_ARCHITECTURE atom struct
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DEFAULT_FILE atom sdramControllerBuildAddress_RTL.vhd

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