Because the chip does not have hardware PWM, it can only be simulated by software, but it is found to be flickering after testing, and there is no breathing effect.
If you use the delay method, it can be done, but it is too slow for operating efficiency.
My goal is to use the timer interrupt to realize the breathing light. What should I do?
Esmeralda 发表于 December 17, 2020
The software opens a 40US interrupt and adds 40US to each grid.
Alejandra 发表于 December 17, 2020
The timer simulates PWM, only the initial segment is a little bit close.
Frederick 发表于 December 17, 2020
Software simulation, just put it in the interrupt.
Savanna 发表于 December 17, 2020
In that case, take a variable and set the range to 0-10, then put interrupt, less than 2 the light is on, otherwise the light is off, and the overflow is cleared. Then reverse the state of the light to see if the brightness has changed. This judgment condition is similar to the duty cycle.
