zcy
/
pluto_hdl_adi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

avl_dacfifo: Fix alv_mem_readen generation

main
Istvan Csomortani 2017-05-15 11:51:05 +03:00
parent f456ebc6f0
commit 0f1e51ac98
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
library/altera/avl_dacfifo/avl_dacfifo_wr.v
View File

@ -76,6 +76,7 @@ module avl_dacfifo_wr #(
wire [AVL_DATA_WIDTH-1:0] avl_mem_rdata_s;
wire avl_mem_fetch_wr_address_s;
wire avl_mem_readen_s;
wire [AVL_MEM_ADDRESS_WIDTH :0] avl_mem_address_diff_s;
wire avl_write_transfer_s;
wire avl_last_transfer_req_s;
wire avl_xfer_req_init_s;
@ -96,7 +97,6 @@ module avl_dacfifo_wr #(
reg [AVL_MEM_ADDRESS_WIDTH-1:0] avl_mem_rd_address;
reg [AVL_MEM_ADDRESS_WIDTH-1:0] avl_mem_rd_address_g;
reg [AVL_MEM_ADDRESS_WIDTH-1:0] avl_mem_wr_address;
reg [AVL_MEM_ADDRESS_WIDTH-1:0] avl_mem_wr_address_next;
reg avl_mem_fetch_wr_address;
reg avl_mem_fetch_wr_address_m1;
reg avl_mem_fetch_wr_address_m2;
@ -250,21 +250,20 @@ module avl_dacfifo_wr #(
avl_mem_fetch_wr_address_m2 <= 0;
avl_mem_fetch_wr_address <= 0;
avl_mem_wr_address <= 0;
avl_mem_wr_address_next <= 0;
end else begin
avl_mem_fetch_wr_address_m1 <= dma_mem_read_control;
avl_mem_fetch_wr_address_m2 <= avl_mem_fetch_wr_address_m1;
avl_mem_fetch_wr_address <= avl_mem_fetch_wr_address_m2;
if (avl_mem_fetch_wr_address_s == 1'b1) begin
avl_mem_wr_address <= dma_mem_wr_address_d;
avl_mem_wr_address_next <= avl_mem_wr_address + 1;
end
end
end
// Avalon write address and fifo read address generation
assign avl_mem_readen_s = (avl_mem_rd_address == avl_mem_wr_address_next) ? 0 : avl_write_xfer_req;
assign avl_mem_address_diff_s = {1'b1, avl_mem_wr_address} - avl_mem_rd_address;
assign avl_mem_readen_s = (avl_mem_address_diff_s[AVL_MEM_ADDRESS_WIDTH-1:0] == 0) ? 0 : (avl_write_xfer_req & avl_ready);
assign avl_write_transfer_s = avl_write & avl_ready;
assign avl_write_transfer_done_s = avl_write_transfer & ~avl_write_transfer_s;