Pwm

Can someone tell me how to program a pic16f628a in PBP with a frequence of 0.3 Hz??

.3 Hz is impossible with the hardware PWM module. My best bet will be to create one using the Timer interrupts.... but ...ahem... 0.3 HZ is really slow... what is the purpose of a so slow frequency? Maybe a old 555 could do the job.

.3 KHZ it's possible @4MHZ
hpwm 1,255,300

my purpose was to fade in and out 3 leds in 1 sec. but maybe is it possible to do it with 3 ports of a pic16f628a chip and a cyclus of 1 sec.

so the frequency don't really matter... anyway @.3Hz you'll see them flash so. over hundreds HZ will do the job.

You should look at Multi_SSPWM from Darrel Taylor. it should be enough to start.. and probably finish the whole thing.
http://www.pbpgroup.com/modules/wfse...p?articleid=12

OK thanks for the link.

Greets Jan