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axi_dmac: fix transfer start synchronization 

This change will fix the transfer start synchronization mechanism used
in the AXIS streaming and FIFO source interfaces.
main
Laszlo Nagy 2018-09-11 09:19:25 +01:00 committed by Laszlo Nagy
parent 97409dcb88
commit db25ee1877
3 changed files with 9 additions and 6 deletions
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3
library/axi_dmac/axi_dmac.v
View File

@ -382,7 +382,8 @@ axi_dmac_regmap #(
.DMA_CYCLIC(CYCLIC),
.HAS_DEST_ADDR(HAS_DEST_ADDR),
.HAS_SRC_ADDR(HAS_SRC_ADDR),
.DMA_2D_TRANSFER(DMA_2D_TRANSFER)
.DMA_2D_TRANSFER(DMA_2D_TRANSFER),
.SYNC_TRANSFER_START(SYNC_TRANSFER_START)
) i_regmap (
.s_axi_aclk(s_axi_aclk),
.s_axi_aresetn(s_axi_aresetn),

6
library/axi_dmac/axi_dmac_regmap.v
View File

@ -45,7 +45,8 @@ module axi_dmac_regmap #(
parameter DMA_CYCLIC = 0,
parameter HAS_DEST_ADDR = 1,
parameter HAS_SRC_ADDR = 1,
parameter DMA_2D_TRANSFER = 0
parameter DMA_2D_TRANSFER = 0,
parameter SYNC_TRANSFER_START = 0
) (
// Slave AXI interface
input s_axi_aclk,
@ -221,7 +222,8 @@ axi_dmac_regmap_request #(
.DMA_CYCLIC(DMA_CYCLIC),
.HAS_DEST_ADDR(HAS_DEST_ADDR),
.HAS_SRC_ADDR(HAS_SRC_ADDR),
.DMA_2D_TRANSFER(DMA_2D_TRANSFER)
.DMA_2D_TRANSFER(DMA_2D_TRANSFER),
.SYNC_TRANSFER_START(SYNC_TRANSFER_START)
) i_regmap_request (
.clk(s_axi_aclk),
.reset(~s_axi_aresetn),

6
library/axi_dmac/data_mover.v
View File

@ -185,10 +185,10 @@ end endgenerate
* one has s_axi_sync set. This will be the first beat that is passsed through.
*/
always @(posedge clk) begin
if (m_axi_valid == 1'b1) begin
needs_sync <= 1'b0;
end else if (req_ready == 1'b1) begin
if (req_ready == 1'b1) begin
needs_sync <= req_sync_transfer_start;
end else if (m_axi_valid == 1'b1) begin
needs_sync <= 1'b0;
end
end