• State Not Answered
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 546 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

how to use loops in TIM_IRQHANDLER?

Pavan B

I want to design a variable width PWM waveform using IRQ, but I am unable to use loops in TIM_IRQHANDLERS. below is the code i am using in TIM_IRQHANDLER

void TIM2_IRQHandler(void)
{ volatile float i; volatile int x;
if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { for(i=0.5;i>0.0;i=i-0.1) { x=8000000*i; switch(x) { case 4000000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =4000000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =2000000; } }

case 3200000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =3200000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =1600000; } } case 1600000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =1600000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =800000; } } default: { for(int n=0;n<11;n++) { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =800000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =400000; } } } } }
} if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==0) { for(i=0.1;i<0.6;i=i+0.1) { x=8000000*i; switch(x) { case 800000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =800000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =400000; } }

case 1600000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =1600000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =800000; } } case 3200000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =3200000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =1600000; } } case 4000000: { if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3)==1) { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,0); htim2.Init.Period =4000000 ; } else { HAL_GPIO_WritePin(GPIOB,GPIO_PIN_3,1); htim2.Init.Period =2000000; } } default:{} } }
}

HAL_TIM_IRQHandler(&htim2);

}

Parents Reply Children
No data