timer 1 question

[morebudwiser]

hi i am using timer 1 to generate a 5kHz square wave but i would like to be able to load the timer with a preset number of pulses for it to generate. for example if i load the timer with 100 it will generate 100 pules at a rate of 5khz then stop until i reset the value in the timer. Can anyone suggest how i might go about doing this or is there a better way of generating a specific number of pulses at a required frequency

many thanks morebudwiser

[a]

How are you generating the PWM? interrupt? polling? hardware?

[morebudwiser]

i am using the ccm interrupt to generate the 5khz dont know if this is the best way or not i am open to suggestions. i did try switching an i/o pin high and low put this did not give me and equal mark space ratio

[anestho]

Define an 8bit integer (assuming 255 is the max pulses you will send). In the interrupt use this as a counter to count from the # of pulses you want to zero. Use an if-then to turn off the interrupt when count reaches 0.