Posted on September 23, 2012 at 12:34Hello. I colided with the following problem: ADC1 doesn't start conversion in injected channel from TIM1 CC4 event. Below I quote a piece of code of my initialization of ADC1 and TIM1:
RCC->APB2ENR|=RCC_APB2ENR_TIM1EN; //TIM1 clocking enable
TIM1->PSC=83; //Prescaler 84 (83 + 1) (168 MHz/84=2 MHz)
TIM1->ARR=0xFFFF; //ARR value
TIM1->CCER|=TIM_CCER_CC4E; //Capture enable 4
TIM1->CCR4=10000; //CCR4 value
TIM1->CR1|=TIM_CR1_CEN; //Counting enable
//****************************************************************
//*ADC1
//****************************************************************
void ADC_Config(void){
//------------------------------------------------------------------------------
//*GPIOA analog function
//------------------------------------------------------------------------------
RCC->AHB1ENR|=RCC_AHB1ENR_GPIOAEN; //PORTA clocking on
GPIOA->MODER|=GPIO_MODER_MODER1; //PA1 analog function
//------------------------------------------------------------------------------
//*ADC1 initialization
//-----------------------------------------------------------------------------
RCC->APB2ENR|=RCC_APB2ENR_ADC1EN; //ADC1 clocking on
ADC1->SMPR2|=ADC_SMPR2_SMP1_0
|ADC_SMPR2_SMP1_1
|ADC_SMPR2_SMP1_2; //Conversion cycle
ADC1->JSQR|=ADC_JSQR_JSQ4_0; //Conversion in which channel
//-------------------------------------------------------------------------------
ADC1->CR2&=~ADC_CR2_JEXTSEL; //External event - TIM1_CH4
ADC1->CR2|=ADC_CR2_JEXTEN_0; //Trigger detection on the rising edge
//-------------------------------------------------------------------------------
ADC1->CR2|=ADC_CR2_ADON; //ADC1 ON
//ADC1->CR2|=ADC_CR2_JSWSTART; //Starting conversion of injected channel
result=ADC1->JDR1; //Result
}
I can't understand what and where I missed.
