Hello, I'm new with FPGA programming. I created a simple program to generate PWM, but when I assigned the clock it shows as an error on compilation. Here is my code:
module PWMTest (clock, switches, pwm_o);
parameter sd = 3125; //t = 1ms, p = t/(20*10^-9), p = 50000, sd = 3125
input clock;
input [3:0] switches;
output pwm_o;
reg pwm;
reg [16:0] counter = 0;
always @ (posedge clock)
begin
counter = counter + 1;
if (counter <= switches*sd)
pwm_o = 1;
else pwm_o = 0;
if (counter == 50000)
counter = 0;
end
endmodule
the clock is assigned to H1 or DCLK pin (according to De0 Nano board), but when I turned on the Live I/O check, it said error on line 5 (input clock;) can somebody help me?
