STM32G030K6T6 with PWM

[Sudhakar.R]

Hi,

I'm trying to configure the PWm with STM32G030K6T6. But pwm is not generate.

below I given my code and i don't know where i made a mistake if any one know help me.

RCC->IOPENR |= (RCC_IOPENR_GPIOAEN);  // I/O port A clock enable
	
GPIOA->MODER &= ~(GPIO_MODER_MODE8);  // clear 8th pin
GPIOA->MODER |= (GPIO_MODER_MODE8_1);  // 10: Alternate function mode
	
/********** TIMER 1 Init **********/
	
RCC->APBENR2 |= RCC_APBENR2_TIM1EN;  // TIM1 CLOCK ENABLE
	
TIM1->CR1 &= ~TIM_CR1_DIR; //Set Counter Direction as Up-Counter
	
TIM1->ARR = 1;     //ARR VALUE IS 0-65535
TIM1->PSC = 2000-1;   //PERSCALER VALUE IS 0-65535
TIM1->CCR1 = 1000; //Duty Cycle
TIM1->CNT = 0;   //COUNT START IN 0
TIM1->RCR = 0;
	
TIM1->CCMR1 |= 0x00000068; //Configure the pins as PWM
TIM1->EGR = TIM_EGR_UG;  // Update generation
TIM1->CCER |= TIM_CCER_CC1E;  //Capture/Compare 1 output enable
TIM1->BDTR |= (TIM_BDTR_OSSR | TIM_BDTR_MOE);  // Off-state selection for Run mode & Main output enable
	
TIM1->CR1 |= (TIM_CR1_CMS_0 | TIM_CR1_CEN);  // COUNTER ENABLE & Center-aligned mode selection (01: Center-aligned mode 1)

[Sarra.S]

Hello @Sudhakar.R​,

it might be helpful to provide more information about your hardware setup and any error messages or behavior you are seeing

[Sudhakar.R]

Hi @Sarra.S 

I'm using ​ST - link v2 for debugging and logic analyzer for checking pulse with stm32g030k6t6. And I'm not getting any error message.

[waclawek.jan]

> TIM1->ARR = 1; //ARR VALUE IS 0-65535

With this setting, TIMx_CNT counts from 0 to 1 and then back to 0. It never reaches TIMx_CCR1 so compare never happens, thus there's no edge on the output signal, exactly as you've observed.

Set TIMx_ARR to a value higher than TIMx_CCR1.

JW

[Michal Dudka]

You've probably swap PSC and ARR values...

[Sudhakar.R]

I changed PSC = 1 and ARR = 2000 still pwm is not generate.

[waclawek.jan · Accepted solution]

TIM1_CH1 is AF1 for PA8, so you need to set GPIOA_AFR[1] accordingly.

Generally, if in doubts, read out and check/post content of TIM and relevant GPIO registers.

JW

[Sudhakar.R]

@Community member​ 

Thank you for reply. i got the output.