STM32F051C8T6 PWM not generating on custom TIG control board

[Niva]

I am using the STM32F051C8T6 MCU for TIG welding project, but PWM is not being generated on my custom TIG control board. Can anyone help me so

 

 

[mfgkw]

Are you sure, you call HAL_TIM_Base_Start_IT() for the timer you need?

In your main.c I see only HAL_TIM_Base_Start_IT(&htim3) inside an if()… but HAL_TIM_PWM_Start(&htim14, TIM_CHANNEL_1) for another timer.

[Siddhi]

yes i do this thing also but PWM is not working

 

[Andrew Neil]

Welcome to the forum

Please see How to write your question to maximize your chances to find a solution for best results.

Please show the schematic of the board.

 

Before starting on this custom board, have you got the PWM working on an ST board; eg, 

NUCLEO-F031K6	Active	STM32 Nucleo-32 development board with STM32F031K6 MCU, supports Arduino nano connectivity	STM32 Nucleo boards	ST
NUCLEO-F042K6	Active	STM32 Nucleo-32 development board with STM32F042K6 MCU, supports Arduino nano connectivity	STM32 Nucleo boards	ST
NUCLEO-F072RB	Active	STM32 Nucleo-64 development board with STM32F072RB MCU, supports Arduino and ST morpho connectivity	STM32 Nucleo boards	ST
STM32F0DISCOVERY	Active	Discovery kit with STM32F051R8 MCU	STM32 discovery kits	ST

 

via: https://www.st.com/en/microcontrollers-microprocessors/stm32f051c8.html#tools-software

 

Are you working on the same project as ​@Siddhi here:

 

[Richard Li]

I did replay for @Siddni, this code at least with three mistakes,

• 1. Set TIM3 to PB10 was wrong, PB10 only support TIM2 ch3.​​​​​​​
• ​​​​​​​2. Didn’t set AFRH moder.
• 3. TIM3 didn’t set to PWM mode in CCMR1

[Siddhi]

but i use a TIM14 for pwm

[Richard Li]

After read new code, my early comment need update, new code change to TIM14, the CCMR1 setting done. AFRL setting done.

My comment three point fixed.

[Siddhi]

please tell me in detail how to set 

 

[Richard Li]

In your project, there are two main.c, which one you want use?

This project structure need change, should only one main.c inside.

[Richard Li]

I did change your project structure, and add code inside TIM14_init, PA5 output come out.

[Siddhi]

not working 

[Richard Li]

Typo, PA4

[Richard Li]

I didn’t change every code in your project, after TIM14 init, the “__HAL_TIM_SET_COMPARE(&htim14, TIM_CHANNEL_1, 5000);”   the 5000 too big, force TIM14 stop, if you reduce 5000 to 100, it will continual output pulse.

I used debug step by step, before this set 5000, pulse come out.

Please find some one in local help you, your STM32 code knowledge not enough handle this project. 

[Andrew Neil]

your STM32 code knowledge not enough handle this project. 

+1

 

​@Siddhi  ​@Niva Go back to basics: start with a Nucleo board (or similar); work through basic examples; start simple; add step-by-step

Also:

(those are two different posts in the same thread)

[Richard Li]

In main.c

I add these code:

Your new project delete these code, of cause it doesn’t work.

If you use Scope measure PA4, you can find pulse come out.

    //RL
    // 1. Enable ARR preload
//    TIM14->CR1 |= TIM_CR1_ARPE;

    // 2. Put channel 1 into output mode
    TIM14->CCMR1 &= ~TIM_CCMR1_CC1S;

    // 3. Enable output compare preload
//    TIM14->CCMR1 |= TIM_CCMR1_OC1PE;

    // 4. Set PWM mode 1 (110b)
    TIM14->CCMR1 &= ~TIM_CCMR1_OC1M;
    TIM14->CCMR1 |= (6 << TIM_CCMR1_OC1M_Pos);

    // 5. Enable channel output
    TIM14->CCER |= TIM_CCER_CC1E;

    // 6. Set ARR and CCR1
    TIM14->ARR = 1000;
    TIM14->CCR1 = 50;

    // 7. Start counter
    TIM14->CR1 |= TIM_CR1_CEN;
//RL

[Andrew Neil]

​@Richard Li Please see:

 

[Richard Li]

Attached new code change CCR1 to 5000 fit your original code, it verify by STM32 f0 discovery board , PA4 output pulse frequency 4.8K duty 50%, you can download to F0 discovery test first, maybe your new board with another problem.