How can I synchronize three timers of STM32F446RE board in StmCubeMX timer setting so that the pulses are in phase?

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Pooja Chaurasiya
Pooja Chaurasiya 2024-2-23
回答： Pratyush 2024-7-8
I am using STM32F446RE board, and upon lauching the project in CubeMX from MATLAB, The settings are : I have kept the clock frequency as 90MHz and 10% duty cycle for TIM1, TIM2, TIM3. So it gives same output freuency of the pulses (PWM_Output.png) from each PWM. Model screenshot is also attached (model.PNG). All 3 timer settings have been kept same as shown in (Timer_setting.PNG). I want all the 3 pulses shall be in phase. How can I achieve that ?
Hoping to hear soon!
Thanks in advance!

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回答（1 个）

Pratyush
Pratyush 2024-7-8
Hi Pooja,
To ensure that all three PWM signals are in phase on your STM32F446RE board, you need to synchronize the timers. You can follow these steps:
  • Ensure TIM1, TIM2, and TIM3 have the same prescaler, period, and duty cycle in STM32CubeMX.
  • Designate TIM1 as the master and TIM2, TIM3 as slaves.
  • Set the clock source to "Internal Clock".
  • Enable "Master/Slave Mode".
  • Set "Trigger Output (TRGO)" to "Update Event".
  • Set the clock source to "Internal Clock".
  • Set "Slave Mode" to "Trigger Mode".
  • Set "Trigger Input" to "ITR0" (corresponding to TIM1).
  • Generate Code in STM32CubeMX.
  • Initialize TIM1 first, followed by TIM2 and TIM3 in your main.c.
Hope this helps.

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