IO port analog PWM

xcx7240763

IO port analog PWM [Copy link]

I am new to microcontrollers. I want to use a PIC microcontroller with 8 pins and a 4MHZ crystal oscillator to make the breathing light go from dark to bright, with an interrupt every 20MS and a total time of 1s. How can I use IO port simulation (Timer0 and timer) to achieve this?

huo_hu

There is no counter. Just compare the count value with the duty cycle variable and output it.

dingzy_2002

It is possible to use IO to simulate PWM as a breathing light display, but pay attention to 1. Its PWM cycle (20MS is too large, the effect is poor) 2. Consider the brightness level (generally ≥60 levels, the effect is better) so the interrupt cycle must be at least less than 1MS to complete.

huo_hu

Disappeared