?? pwm.v
字號:
module pwm (clk4,inpwm,clk_odd,pwm_out,wr_pwm);
input clk4;
input[15:0] inpwm;
input wr_pwm;
output clk_odd;
output pwm_out;
reg clk_odd;
reg[11:0] count_p;
reg [15:0] pulse_width;
reg p;
reg [9:0] counter;
parameter N=400;
always @ (posedge clk4)
if(count_p<N/2-1)
count_p <=count_p+ 1;
else
begin
count_p<=0;
clk_odd<=~clk_odd;
end
always@( posedge wr_pwm) pulse_width=inpwm;//+10'b100000000;
always @ (posedge clk4)
if(counter<N-1)
counter<=counter+1;
else
counter<=0;
always @ (posedge clk4)
if(counter<pulse_width)
p<=1;
else
//if(counter==pulse_width)
p<=0;
assign pwm_out=p;
endmodule
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