9 years, 2 months ago.

Why does not work the pwm_2 exmaple with Timer 2?

Hi,

I am using the Nucleo_ pwm2 example to try all the PWM outs in the Nucleo-F302R8 board. I have been able to make all the PWM outs work except the PWMs related to Timer 2. I mean, I have tried with this code:

<<#include "mbed.h"

DigitalOut my_led(LED1); InterruptIn my_button(USER_BUTTON); PwmOut my_pwm(PA_0);

void pressed() { if (my_pwm.read() == 0.25) { my_pwm.write(0.75); } else { my_pwm.write(0.25); } }

int main() { Set PWM my_pwm.period_ms(10); my_pwm.write(0.5);

Set button my_button.fall(&pressed);

while (1) { my_led = !my_led; wait(0.5); 500 ms } }>>

But when I use a pin which the PWM works using the Timer 2 I can not make it work. I have made it successfully with Timer 1 (PC_0, PC_1, PC_2...), Timer 15 (PB_14,PB_15...), Timer 16 (PB_4, PB_8...), Timer 17 (PA_7, PB_9...) but if I try with Timer 2, does not matter the pin I use because it does not work (PA_0, PA_2, PA_3,PA_5...)

Anyone knows why this does not work? How can I use these PWM outs? Is this happening because the Timer 2 is the only timer which uses 32 bits and it needs a special configuration?

Regards.