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ram_shim: add and lint

This commit is contained in:
Peter McGoron 2022-11-26 11:53:57 -05:00
parent c8d7572db5
commit a12fbf8af2
1 changed files with 4 additions and 4 deletions
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8
firmware/rtl/raster/ram_shim.v
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@ -28,20 +28,20 @@ localparam WAIT_ON_COMMIT_DEASSERT = 3;
reg [2:0] state = WAIT_ON_COMMIT; reg [2:0] state = WAIT_ON_COMMIT;
reg [MAX_BYTE_WID-1:0] offset = 0; reg [MAX_BYTE_WID-1:0] offset = 0;
assign addr = BASE_ADDR + offset; assign addr = BASE_ADDR + {{(RAM_WID - MAX_BYTE_WID){1'b0}}, offset};
always @ (posedge clk) begin always @ (posedge clk) begin
case (state) case (state)
WAIT_ON_COMMIT: if (commit) begin WAIT_ON_COMMIT: if (commit) begin
word <= data[RAM_WORD-1:0]; word <= data[RAM_WORD-1:0];
write <= 1; write <= 1;
state <= HIGH_WORD; state <= HIGH_WORD_LOAD;
end end
HIGH_WORD_LOAD: if (valid) begin HIGH_WORD_LOAD: if (valid) begin
offset <= offset + (RAM_WORD/2); offset <= offset + (RAM_WORD/2);
write <= 0; write <= 0;
word <= {(RAM_WORD*2 - DAT_WID){word[DAT_WID-1]}, word <= {{(RAM_WORD*2 - DAT_WID){data[DAT_WID-1]}},
word[DAT_WID-1:RAM_WORD]}; data[DAT_WID-1:RAM_WORD]};
state <= WAIT_ON_HIGH_WORD; state <= WAIT_ON_HIGH_WORD;
end end
WAIT_ON_HIGH_WORD: if (!write) begin WAIT_ON_HIGH_WORD: if (!write) begin