stm32 generate PWM signal with multiple channels

Question

HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
TIM3->CCR1 =25000;

I'm trying to set 2 pins to the same PWM signal at the same time. However, it doesn't work. Only 1 pin (channel 1) has PWM output and the 2nd pin (channe 2) has empty output.

Please add the image to the question. Third-party links are discouraged. — amanb, Apr 19 '18 at 20:18

0___________ · Answer 1 · 2018-04-19T22:51:48.960

4

Every channel has its own register CCR

You only set one, the second one has the default value - 0 - and the duty ratio of the generated PWM signal is zero or 100% depending on the other registers settings.

add:

TIM3->CCR2 = /*your value here*/;

and it should work

edited Apr 19 '18 at 22:51

answered Apr 19 '18 at 22:28

0___________

60,014
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1

And I would set both CCR registers *before* starting the timer. – followed Monica to Codidact Apr 20 '18 at 06:35

score 0 · Answer 2 · answered Aug 03 '21 at 10:05

0

try with these commands
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, value); __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, value);

answered Aug 03 '21 at 10:05

akshay kumar

1

stm32 generate PWM signal with multiple channels

2 Answers2