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spi_engine_execution: Optimize SDI latch delay logic

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Istvan Csomortani 2020-06-07 17:10:37 +01:00 committed by István Csomortáni
parent 137c31db1d
commit e0d47645de
1 changed files with 3 additions and 6 deletions
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9
library/spi_engine/spi_engine_execution/spi_engine_execution.v
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@ -141,7 +141,7 @@ wire sdi_enabled = cmd_d1[9];
reg [(DATA_WIDTH-1):0] data_sdo_shift = 'h0; reg [(DATA_WIDTH-1):0] data_sdo_shift = 'h0;
reg [4:0] trigger_rx_d = 5'b0; reg [SDI_DELAY+1:0] trigger_rx_d = {(SDI_DELAY+1){1'b0}};
wire [1:0] inst = cmd[13:12]; wire [1:0] inst = cmd[13:12];
wire [1:0] inst_d1 = cmd_d1[13:12]; wire [1:0] inst_d1 = cmd_d1[13:12];
@ -391,13 +391,10 @@ assign sdo_int_s = data_sdo_shift[DATA_WIDTH-1];
always @(posedge clk) begin always @(posedge clk) begin
trigger_rx_d[0] <= trigger_rx; trigger_rx_d[0] <= trigger_rx;
trigger_rx_d[4:1] <= trigger_rx_d[3:0]; trigger_rx_d[SDI_DELAY+1:1] <= trigger_rx_d[SDI_DELAY:0];
end end
assign trigger_rx_s = (SDI_DELAY == 2'b00) ? trigger_rx_d[1] : assign trigger_rx_s = trigger_rx_d[SDI_DELAY+1];
(SDI_DELAY == 2'b01) ? trigger_rx_d[2] :
(SDI_DELAY == 2'b10) ? trigger_rx_d[3] :
(SDI_DELAY == 2'b11) ? trigger_rx_d[4] : trigger_rx_d[1];
// Load the serial data into SDI shift register(s), then link it to the output // Load the serial data into SDI shift register(s), then link it to the output
// register of the module // register of the module