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PWM for AT89C5115 (need informations)

lar hal

hello, every body

i'm working with the AT89C5115 of ATMEL
and i want to generate a square pulse of 40Khz using the PCA( PWM, the capture or the timer ).
for the moment i coulndn't resolve the problem
PCA counter registers (CL and CH) doesn't increment even activated. ?
if some one have informations
i'll be gratefull
thanks in advance

Parents
  • 0 in reply to Werner Meier

    thanks for informations, but finally i didnt use the pwm to generate a burst of 40khz, it wasn't possible for more than 25khz.
    so i wrote a function in assembly.
    i used directly the port (p1) by putting directly 0's and 1's in such a way to have a frequency of 40khz.

    for the timer2 through which pin we could generate the required signal, and i need two signals of 40khz.

    thanks all

Reply
  • 0 in reply to Werner Meier

    thanks for informations, but finally i didnt use the pwm to generate a burst of 40khz, it wasn't possible for more than 25khz.
    so i wrote a function in assembly.
    i used directly the port (p1) by putting directly 0's and 1's in such a way to have a frequency of 40khz.

    for the timer2 through which pin we could generate the required signal, and i need two signals of 40khz.

    thanks all

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