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Fixed XOR logic in GPIO

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This commit is contained in:
David Harris 2022-06-13 19:26:03 +00:00
parent b586e3af37
commit 09d72a33c5
1 changed files with 5 additions and 4 deletions
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9
pipelined/src/uncore/gpio.sv
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@ -48,7 +48,7 @@ module gpio (
logic [31:0] input0d, input1d, input2d, input3d; logic [31:0] input0d, input1d, input2d, input3d;
logic [31:0] input_val, input_en, output_en, output_val; logic [31:0] input_val, input_en, output_en, output_val;
logic [31:0] rise_ie, rise_ip, fall_ie, fall_ip, high_ie, high_ip, low_ie, low_ip; logic [31:0] rise_ie, rise_ip, fall_ie, fall_ip, high_ie, high_ip, low_ie, low_ip, out_xor;
logic initTrans, memwrite; logic initTrans, memwrite;
logic [7:0] entry, entryd; logic [7:0] entry, entryd;
@ -91,6 +91,7 @@ module gpio (
high_ip <= #1 0; high_ip <= #1 0;
low_ie <= #1 0; low_ie <= #1 0;
low_ip <= #1 0; low_ip <= #1 0;
out_xor <= 1'b 0;
end else begin end else begin
// writes // writes
if (memwrite) if (memwrite)
@ -104,7 +105,7 @@ module gpio (
8'h20: fall_ie <= #1 Din; 8'h20: fall_ie <= #1 Din;
8'h28: high_ie <= #1 Din; 8'h28: high_ie <= #1 Din;
8'h30: low_ie <= #1 Din; 8'h30: low_ie <= #1 Din;
8'h40: output_val <= #1 output_val ^ Din; // OUT_XOR 8'h40: out_xor <= #1 Din;
endcase endcase
/* verilator lint_on CASEINCOMPLETE */ /* verilator lint_on CASEINCOMPLETE */
// reads // reads
@ -121,7 +122,7 @@ module gpio (
8'h2C: Dout <= #1 high_ip; 8'h2C: Dout <= #1 high_ip;
8'h30: Dout <= #1 low_ie; 8'h30: Dout <= #1 low_ie;
8'h34: Dout <= #1 low_ip; 8'h34: Dout <= #1 low_ip;
8'h40: Dout <= #1 0; // OUT_XOR reads as 0 8'h40: Dout <= #1 out_xor;
default: Dout <= #1 0; default: Dout <= #1 0;
endcase endcase
// interrupts // interrupts
@ -152,7 +153,7 @@ module gpio (
flop #(32) sync2(HCLK,input1d,input2d); flop #(32) sync2(HCLK,input1d,input2d);
flop #(32) sync3(HCLK,input2d,input3d); flop #(32) sync3(HCLK,input2d,input3d);
assign input_val = input3d; assign input_val = input3d;
assign GPIOPinsOut = output_val; assign GPIOPinsOut = output_val ^ out_xor;
assign GPIOPinsEn = output_en; assign GPIOPinsEn = output_en;
assign GPIOIntr = |{(rise_ip & rise_ie),(fall_ip & fall_ie),(high_ip & high_ie),(low_ip & low_ie)}; assign GPIOIntr = |{(rise_ip & rise_ie),(fall_ip & fall_ie),(high_ip & high_ie),(low_ip & low_ie)};