how to only output stm32 pwm CH1N and disable CH1, in "pwm generation CH1 CH1N" mode

[Davi]

the below code is not working for me

//HAL_TIM_PWM_Start(&htim15,TIM_CHANNEL_1);

HAL_TIMEx_PWMN_Start(&htim15,TIM_CHANNEL_1);

[Foued_KH]

Hello @Davi​ ,

You can use this code, it works fine:

HAL_TIM_PWM_Start(&htim15, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim15, TIM_CHANNEL_1);

Foued

[Davi]

1. Yes， when enable HAL_TIM_PWM_Start(&htim15, TIM_CHANNEL_1); and HAL_TIMEx_PWMN_Start(&htim15, TIM_CHANNEL_1); then PWMN channel is working,
2. But I just want to enable CH1N  or CH1 at one time, not enable both CH1N and CH1
3. ​

[Foued_KH]

I think you should set PWM on CH1 and CH2N :

HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_2);

Foued

[Davi]

The problem is I have 9 DC motor, all motors are need pwm,

so I want to use CH1 and CH1N seperatly to control 2 motor

can I do this?

[Peter BENSCH · Accepted solution]

CH1N is controlled by the same channel as CH1, except that CH1N is inverted (we will leave out details such as the dead time required for half bridges for this consideration). If you want to control two DC motors separately, you also need two separate PWM channels, consequently 9 PWM channels for 9 DC motors.

Since we don't know yet which STM32 you want to use, we can't give a hint yet.

Regards

/Peter

[Davi]

Thank you, STM32G070RB

[Peter BENSCH]

With the STM32G070RB you are able to control up to 10 PWM channels:

• TIM1, ch1...4
• TIM3, ch1...4
• TIM15, ch 1...2

Think that's enough for your 9 motors?

Regards

/Peter

[Davi]

yes, thank you very much​

[Peter BENSCH]

You're welcome!

When your question is answered, please mark this topic as answered by choosing Select as Best for the preferred answer, as also explained here. This will help other users find that answer faster.

Good luck!

/Peter