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Code Issues Releases Wiki Activity

[QL] reduced QIMI IRQ load

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This commit is contained in:
Till Harbaum
2015-08-19 16:13:29 +02:00
parent e8adc3e78b
commit 73cb3e04fb
1 changed files with 5 additions and 5 deletions
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10
cores/ql/qimi.v
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@@ -67,7 +67,7 @@ reg sign_x, sign_y;
reg [7:0] x_reg;
// counter to limit irq rate to 2khz
reg [9:0] irq_holdoff;
reg [11:0] irq_holdoff;
always @(posedge clk) begin
if(reset) begin
@@ -75,11 +75,11 @@ always @(posedge clk) begin
y_pos <= 10'd0;
cnt <= 2'd0;
irq <= 1'b0;
irq_holdoff <= 10'd0;
irq_holdoff <= 12'd0;
end else begin
// check if we have to fire another irq
if(irq_holdoff != 0) begin
irq_holdoff <= irq_holdoff - 10'd1;
irq_holdoff <= irq_holdoff - 12'd1;
if((irq_holdoff == 1) && (x_mov || y_mov))
irq <= 1'b1;
end
@@ -105,7 +105,7 @@ always @(posedge clk) begin
cnt <= 2'd0;
if(irq_holdoff == 0)
irq_holdoff <= 10'd1;
irq_holdoff <= 12'd1;
end
end else begin
// one bit has been reported to host
@@ -124,7 +124,7 @@ always @(posedge clk) begin
irq <= 1'b0;
// next irq after some time ...
irq_holdoff <= 10'd1000;
irq_holdoff <= 12'd4000;
end
end
end