lpp_waveform_dma_send_Nword.vhd
173 lines
| 5.4 KiB
| text/x-vhdl
|
VhdlLexer
pellion
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r165 | ------------------------------------------------------------------------------ | ||
-- 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 | ||||
---------------------------------------------------------------------------- | ||||
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_waveform_dma_send_Nword 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; | ||||
-- | ||||
Nb_word_less1 : IN STD_LOGIC_VECTOR(3 DOWNTO 0); | ||||
-- | ||||
send : IN STD_LOGIC; | ||||
address : IN STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
data : IN STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
ren : OUT STD_LOGIC; | ||||
-- | ||||
send_ok : OUT STD_LOGIC; | ||||
send_ko : OUT STD_LOGIC | ||||
); | ||||
END lpp_waveform_dma_send_Nword; | ||||
ARCHITECTURE beh OF lpp_waveform_dma_send_Nword IS | ||||
TYPE state_fsm_send_Nword IS (IDLE, REQUEST_BUS, SEND_DATA, ERROR0, ERROR1, WAIT_LAST_READY); | ||||
SIGNAL state : state_fsm_send_Nword; | ||||
SIGNAL data_counter : INTEGER; | ||||
SIGNAL grant_counter : INTEGER; | ||||
BEGIN -- beh | ||||
DMAIn.Beat <= HINCR16; | ||||
DMAIn.Size <= HSIZE32; | ||||
PROCESS (HCLK, HRESETn) | ||||
BEGIN -- PROCESS | ||||
IF HRESETn = '0' THEN -- asynchronous reset (active low) | ||||
state <= IDLE; | ||||
send_ok <= '0'; | ||||
send_ko <= '0'; | ||||
DMAIn.Reset <= '0'; | ||||
DMAIn.Address <= (OTHERS => '0'); | ||||
DMAIn.Request <= '0'; | ||||
DMAIn.Store <= '0'; | ||||
DMAIn.Burst <= '1'; | ||||
DMAIn.Lock <= '0'; | ||||
data_counter <= 0; | ||||
ELSIF HCLK'EVENT AND HCLK = '1' THEN -- rising clock edge | ||||
CASE state IS | ||||
WHEN IDLE => | ||||
DMAIn.Store <= '1'; | ||||
DMAIn.Request <= '0'; | ||||
send_ok <= '0'; | ||||
send_ko <= '0'; | ||||
DMAIn.Address <= address; | ||||
data_counter <= 0; | ||||
DMAIn.Lock <= '0'; -- FIX test | ||||
IF send = '1' THEN | ||||
state <= REQUEST_BUS; | ||||
DMAIn.Request <= '1'; | ||||
DMAIn.Lock <= '1'; -- FIX test | ||||
DMAIn.Store <= '1'; | ||||
END IF; | ||||
WHEN REQUEST_BUS => | ||||
IF DMAOut.Grant = '1' THEN | ||||
data_counter <= 1; | ||||
grant_counter <= 1; | ||||
state <= SEND_DATA; | ||||
END IF; | ||||
WHEN SEND_DATA => | ||||
IF DMAOut.Fault = '1' THEN | ||||
DMAIn.Reset <= '0'; | ||||
DMAIn.Address <= (OTHERS => '0'); | ||||
DMAIn.Request <= '0'; | ||||
DMAIn.Store <= '0'; | ||||
DMAIn.Burst <= '0'; | ||||
state <= ERROR0; | ||||
ELSE | ||||
IF DMAOut.Grant = '1' THEN | ||||
IF grant_counter = UNSIGNED(Nb_word_less1) THEN -- | ||||
DMAIn.Reset <= '0'; | ||||
DMAIn.Request <= '0'; | ||||
DMAIn.Store <= '0'; | ||||
DMAIn.Burst <= '0'; | ||||
ELSE | ||||
grant_counter <= grant_counter+1; | ||||
END IF; | ||||
END IF; | ||||
IF DMAOut.OKAY = '1' THEN | ||||
IF data_counter = UNSIGNED(Nb_word_less1) THEN | ||||
DMAIn.Address <= (OTHERS => '0'); | ||||
state <= WAIT_LAST_READY; | ||||
ELSE | ||||
data_counter <= data_counter + 1; | ||||
END IF; | ||||
END IF; | ||||
END IF; | ||||
WHEN WAIT_LAST_READY => | ||||
IF DMAOut.Ready = '1' THEN | ||||
IF grant_counter = UNSIGNED(Nb_word_less1) THEN | ||||
state <= IDLE; | ||||
send_ok <= '1'; | ||||
send_ko <= '0'; | ||||
ELSE | ||||
state <= ERROR0; | ||||
END IF; | ||||
END IF; | ||||
WHEN ERROR0 => | ||||
state <= ERROR1; | ||||
WHEN ERROR1 => | ||||
send_ok <= '0'; | ||||
send_ko <= '1'; | ||||
state <= IDLE; | ||||
WHEN OTHERS => NULL; | ||||
END CASE; | ||||
END IF; | ||||
END PROCESS; | ||||
DMAIn.Data <= data; | ||||
ren <= '0' WHEN DMAOut.OKAY = '1' AND state = SEND_DATA ELSE | ||||
'0' WHEN state = REQUEST_BUS AND DMAOut.Grant = '1' ELSE | ||||
'1'; | ||||
END beh; | ||||