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library/spi_engine: fix cs sleep duration for clk_div=0 #1665

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Merged
LBFFilho merged 1 commit into from
May 7, 2025
Merged

library/spi_engine: fix cs sleep duration for clk_div=0 #1665

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2 changes: 1 addition & 1 deletion docs/regmap/adi_regmap_spi_engine.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ RO
ENDFIELD

FIELD
[7:0] 0x00000000
[7:0] 0x00000001
VERSION_PATCH
RO
ENDFIELD
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2 changes: 1 addition & 1 deletion library/spi_engine/axi_spi_engine/axi_spi_engine.v
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Expand Up @@ -133,7 +133,7 @@ module axi_spi_engine #(
input [7:0] offload_sync_data
);

localparam PCORE_VERSION = 'h010500;
localparam PCORE_VERSION = 'h010501;
localparam S_AXI = 0;
localparam UP_FIFO = 1;

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29 changes: 17 additions & 12 deletions library/spi_engine/spi_engine_execution/spi_engine_execution.v
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Expand Up @@ -309,26 +309,31 @@ module spi_engine_execution #(
end

always @(posedge clk) begin
if (idle == 1'b1 || (cs_sleep_counter_compare && !cs_sleep_repeat && inst_d1 == CMD_CHIPSELECT)) begin
if (idle == 1'b1) begin
bit_counter <= 'h0;
transfer_counter <= 'h0;
sleep_counter <= 'h0;
ntx_rx <= 1'b0;
sleep_counter_increment <= 1'b0;
end else if (clk_div_last == 1'b1 && wait_for_io == 1'b0) begin
if (last_bit && transfer_active && ntx_rx) begin
bit_counter <= 'h0;
transfer_counter <= transfer_counter + 1;
ntx_rx <= ~ntx_rx;
end else begin
if (transfer_active) begin
bit_counter <= bit_counter + ntx_rx;
sleep_counter <= 'h0;
end else begin
if (clk_div_last == 1'b1 && wait_for_io == 1'b0) begin
if (last_bit && transfer_active && ntx_rx) begin
bit_counter <= 'h0;
transfer_counter <= transfer_counter + 1;
ntx_rx <= ~ntx_rx;
end else begin
sleep_counter_increment <= ~sleep_counter_increment;
sleep_counter <= sleep_counter + sleep_counter_increment;
if (transfer_active) begin
bit_counter <= bit_counter + ntx_rx;
ntx_rx <= ~ntx_rx;
end else begin
sleep_counter_increment <= ~sleep_counter_increment;
sleep_counter <= sleep_counter + sleep_counter_increment;
end
end
end
if (cs_sleep_counter_compare && !cs_sleep_repeat && inst_d1 == CMD_CHIPSELECT) begin
sleep_counter <= 'h0;
end
end
end

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