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Merge pull request #3 from elvisfox/master

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Do not generate usb_rst upon power-on reset
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Martin Vejnár 2019-12-10 11:20:19 +01:00 committed by GitHub
commit 8f799bb9f1
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1 changed files with 4 additions and 2 deletions
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6
usb_utils.v
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@ -144,18 +144,20 @@ module usb_reset_detect(
input se0,
output usb_rst);
localparam cntr_rst_val = 19'd480000;
reg[18:0] cntr;
assign usb_rst = cntr == 1'b0;
always @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
cntr <= 1'b0;
cntr <= cntr_rst_val;
end else begin
if (se0) begin
if (!usb_rst)
cntr <= cntr - 1'b1;
end else begin
cntr <= 19'd480000;
cntr <= cntr_rst_val;
end
end
end