lpp_dma_send_16word.vhd
173 lines
| 5.3 KiB
| text/x-vhdl
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VhdlLexer
pellion@stage-ps1.lab-lpp.local
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r102 | ------------------------------------------------------------------------------ | |
-- This file is a part of the LPP VHDL IP LIBRARY | |||
-- Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS | |||
-- | |||
-- This program is free software; you can redistribute it and/or modify | |||
-- it under the terms of the GNU General Public License as published by | |||
-- the Free Software Foundation; either version 3 of the License, or | |||
-- (at your option) any later version. | |||
-- | |||
-- This program is distributed in the hope that it will be useful, | |||
-- but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |||
-- GNU General Public License for more details. | |||
-- | |||
-- You should have received a copy of the GNU General Public License | |||
-- along with this program; if not, write to the Free Software | |||
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |||
------------------------------------------------------------------------------- | |||
-- Author : Jean-christophe Pellion | |||
-- Mail : jean-christophe.pellion@lpp.polytechnique.fr | |||
-- jean-christophe.pellion@easii-ic.com | |||
---------------------------------------------------------------------------- | |||
pellion@stage-ps1.lab-lpp.local
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r101 | ||
LIBRARY ieee; | |||
USE ieee.std_logic_1164.ALL; | |||
USE ieee.numeric_std.ALL; | |||
LIBRARY grlib; | |||
USE grlib.amba.ALL; | |||
USE grlib.stdlib.ALL; | |||
USE grlib.devices.ALL; | |||
USE GRLIB.DMA2AHB_Package.ALL; | |||
LIBRARY lpp; | |||
USE lpp.lpp_amba.ALL; | |||
USE lpp.apb_devices_list.ALL; | |||
USE lpp.lpp_memory.ALL; | |||
LIBRARY techmap; | |||
USE techmap.gencomp.ALL; | |||
ENTITY lpp_dma_send_16word IS | |||
PORT ( | |||
-- AMBA AHB system signals | |||
HCLK : IN STD_ULOGIC; | |||
HRESETn : IN STD_ULOGIC; | |||
-- DMA | |||
DMAIn : OUT DMA_In_Type; | |||
DMAOut : IN DMA_OUt_Type; | |||
-- | |||
send : IN STD_LOGIC; | |||
address : IN STD_LOGIC_VECTOR(31 DOWNTO 0); | |||
data : IN STD_LOGIC_VECTOR(31 DOWNTO 0); | |||
pellion@stage-ps1.lab-lpp.local
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r102 | ren : OUT STD_LOGIC; | |
pellion@stage-ps1.lab-lpp.local
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r101 | -- | |
send_ok : OUT STD_LOGIC; | |||
send_ko : OUT STD_LOGIC | |||
); | |||
END lpp_dma_send_16word; | |||
ARCHITECTURE beh OF lpp_dma_send_16word IS | |||
pellion@stage-ps1.lab-lpp.local
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r102 | TYPE state_fsm_send_16word IS (IDLE, REQUEST_BUS, SEND_DATA, ERROR0, ERROR1, WAIT_LAST_READY); | |
pellion@stage-ps1.lab-lpp.local
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r101 | SIGNAL state : state_fsm_send_16word; | |
pellion@stage-ps1.lab-lpp.local
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r102 | SIGNAL data_counter : INTEGER; | |
pellion@stage-ps1.lab-lpp.local
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r101 | SIGNAL grant_counter : INTEGER; | |
BEGIN -- beh | |||
pellion@stage-ps1.lab-lpp.local
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r102 | DMAIn.Beat <= HINCR16; | |
DMAIn.Size <= HSIZE32; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | ||
PROCESS (HCLK, HRESETn) | |||
BEGIN -- PROCESS | |||
pellion@stage-ps1.lab-lpp.local
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r102 | IF HRESETn = '0' THEN -- asynchronous reset (active low) | |
state <= IDLE; | |||
send_ok <= '0'; | |||
send_ko <= '0'; | |||
pellion
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r190 | DMAIn.Reset <= '1'; | |
pellion@stage-ps1.lab-lpp.local
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r102 | DMAIn.Address <= (OTHERS => '0'); | |
DMAIn.Request <= '0'; | |||
DMAIn.Store <= '0'; | |||
DMAIn.Burst <= '1'; | |||
DMAIn.Lock <= '0'; | |||
data_counter <= 0; | |||
pellion
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r190 | grant_counter <= 0; | |
pellion@stage-ps1.lab-lpp.local
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r101 | ELSIF HCLK'EVENT AND HCLK = '1' THEN -- rising clock edge | |
pellion
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r190 | DMAIn.Reset <= '0'; | |
pellion@stage-ps1.lab-lpp.local
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r101 | CASE state IS | |
WHEN IDLE => | |||
DMAIn.Store <= '1'; | |||
DMAIn.Request <= '0'; | |||
pellion@stage-ps1.lab-lpp.local
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r102 | send_ok <= '0'; | |
send_ko <= '0'; | |||
DMAIn.Address <= address; | |||
data_counter <= 0; | |||
DMAIn.Lock <= '0'; -- FIX test | |||
pellion@stage-ps1.lab-lpp.local
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r101 | IF send = '1' THEN | |
pellion@stage-ps1.lab-lpp.local
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r102 | state <= REQUEST_BUS; | |
DMAIn.Request <= '1'; | |||
DMAIn.Lock <= '1'; -- FIX test | |||
DMAIn.Store <= '1'; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | END IF; | |
WHEN REQUEST_BUS => | |||
pellion@stage-ps1.lab-lpp.local
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r102 | IF DMAOut.Grant = '1' THEN | |
data_counter <= 1; | |||
grant_counter <= 1; | |||
state <= SEND_DATA; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | END IF; | |
WHEN SEND_DATA => | |||
IF DMAOut.Fault = '1' THEN | |||
pellion@stage-ps1.lab-lpp.local
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r102 | DMAIn.Reset <= '0'; | |
DMAIn.Address <= (OTHERS => '0'); | |||
DMAIn.Request <= '0'; | |||
DMAIn.Store <= '0'; | |||
DMAIn.Burst <= '0'; | |||
state <= ERROR0; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | ELSE | |
IF DMAOut.Grant = '1' THEN | |||
pellion@stage-ps1.lab-lpp.local
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r102 | IF grant_counter = 15 THEN | |
DMAIn.Reset <= '0'; | |||
DMAIn.Request <= '0'; | |||
DMAIn.Store <= '0'; | |||
DMAIn.Burst <= '0'; | |||
ELSE | |||
grant_counter <= grant_counter+1; | |||
END IF; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | END IF; | |
IF DMAOut.OKAY = '1' THEN | |||
IF data_counter = 15 THEN | |||
pellion@stage-ps1.lab-lpp.local
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r102 | DMAIn.Address <= (OTHERS => '0'); | |
state <= WAIT_LAST_READY; | |||
pellion@stage-ps1.lab-lpp.local
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r101 | ELSE | |
pellion@stage-ps1.lab-lpp.local
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r102 | data_counter <= data_counter + 1; | |
pellion@stage-ps1.lab-lpp.local
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r101 | END IF; | |
END IF; | |||
END IF; | |||
pellion@stage-ps1.lab-lpp.local
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r102 | ||
pellion@stage-ps1.lab-lpp.local
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r101 | WHEN WAIT_LAST_READY => | |
IF DMAOut.Ready = '1' THEN | |||
IF grant_counter = 15 THEN | |||
state <= IDLE; | |||
send_ok <= '1'; | |||
send_ko <= '0'; | |||
ELSE | |||
pellion@stage-ps1.lab-lpp.local
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r102 | state <= ERROR0; | |
pellion@stage-ps1.lab-lpp.local
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r101 | END IF; | |
END IF; | |||
WHEN ERROR0 => | |||
state <= ERROR1; | |||
WHEN ERROR1 => | |||
send_ok <= '0'; | |||
send_ko <= '1'; | |||
pellion@stage-ps1.lab-lpp.local
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r102 | state <= IDLE; | |
pellion@stage-ps1.lab-lpp.local
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r101 | WHEN OTHERS => NULL; | |
END CASE; | |||
END IF; | |||
END PROCESS; | |||
pellion@stage-ps1.lab-lpp.local
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r102 | DMAIn.Data <= data; | |
pellion@stage-ps1.lab-lpp.local
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r101 | ||
pellion@stage-ps1.lab-lpp.local
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r102 | ren <= '0' WHEN DMAOut.OKAY = '1' AND state = SEND_DATA ELSE | |
'0' WHEN state = REQUEST_BUS AND DMAOut.Grant = '1' ELSE | |||
pellion@stage-ps1.lab-lpp.local
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r101 | '1'; | |
pellion
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r190 | END beh; |