How to get fixed number of pulses with PWM mode on STM32f205xx

[Skada.3]

Using timer 1 for PWM cycle generationand getting proper PWM pulses using Standarad peripheral library.

My requirement is to get fixed number of PWM pulses on each channel of Timer 1

For this I have used one pulse mode. using HAL library able to get desired output but with standarad peripheral library not able to get pulses.

I have attached source file for code.

Please suggest what step is missing in the code.

[waclawek.jan]

Read out and check/compare content of TIM1 and relevant GPIO registers.

TIM1 is Advanced Timer, so it needs to have TIM1_BDTR.MOE set.

JW

[Skada.3]

Hi jan,

Thank you for your response.

In code TIM1_BDTR.MOE is already set using TIM_CtrlPWMOutputs(TIM1, ENABLE)

without enabling I will not get PWM cycle, I am facing issue to get fixed number of pulses on channel.

[waclawek.jan]

> I am facing issue to get fixed number of pulses on channel.

What does this mean? Do you see less or more pulses than you expect?

You are supposed to set TIMx_BDTR.MOE *before* you enable the counter.

Read out and check/post content of TIM1 registers.

JW

[Skada.3]

After PWM enable then it gives continous output. but for example I required only 100 pulses on channel 1, this fixed output I am not able to get.

This is possible using RCR register and getting output using HAL library but with standarad peripheral it fails.

[waclawek.jan]

Read out and check/post content of TIM1 registers.

JW

[Skada.3]

Hi JW,

Didn't get your suggestion.

[waclawek.jan]

In debugger, stop execution just before enabling the timer, and read out the TIM1 registers.

If you don't use debugger, then transmit/print/output in whatever method the content of TIM1 registers.

JW

[Skada.3]

Hi

got an expected output with the same main.c file.

Thanks