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ADC regular simultanous dual mode with timer external trigger

Question asked by Phataas on Aug 4, 2013
Latest reply on Aug 7, 2013 by Phataas
I am trying to get ADC regular dual mode with external trigger on timer 1 to work. I have read a lot of posts on this forum about ADC dual mode and some on external triggering, but I still can't get it to work. When I instead use software to start ADC conversions it all works as it should. So ADC conversions are not getting triggered by the timer interrupt i suspect.

#define ADC_DATA_BUFFER_SIZE 7200
__IO uint32_t ADCdata[ADC_DATA_BUFFER_SIZE+160];
  
void main(void)
{
    ADC_IQSamplingInitialization();
    TIMER1_Enable();
    while(1)
    {
  
    }
}
  
void ADC_IQSamplingInitialization(void)
{
    NVIC_DmaAdcInitialization();
    DMA_AdcInitialization();
    ADC_Adc1Initialization();
    ADC_Adc2Initialization();
  
    //Enable timer 1 compare as external trigger
    ADC_ExternalTrigConvCmd(ADC1, ENABLE);
    ADC_ExternalTrigConvCmd(ADC2, ENABLE);
  
    //Enable ADC2
    ADC_Cmd(ADC2, ENABLE);
  
    //Enable ADC1
    ADC_Cmd(ADC1, ENABLE);
}
  
void NVIC_DmaAdcInitialization(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;
  
    //Register with Nested Vectored Interrupt Controller (NVIC).
    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0A;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0A;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  
    //Add DMA1_Channel1_IRQn to NVIC
    NVIC_Init(&NVIC_InitStructure);
}
  
void DMA_AdcInitialization(void)
{
    DMA_InitTypeDef DMA_InitStructure;
  
    //Enable DMA1 clock
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  
    //Configure DMA1 CH1
    DMA_Cmd(DMA1_Channel1, DISABLE);
    DMA_DeInit(DMA1_Channel1);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) ADC_DATA_REGISTER_ADDRESS;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &ADCdata[0];
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = ADC_DATA_BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  
    //Initialize DMA1 CH1
    DMA_Init(DMA1_Channel1, &DMA_InitStructure);
  
    //Enable DMA Transfer Complete interrupt
    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
  
    //Enable DMA1 CH1
    DMA_Cmd(DMA1_Channel1, ENABLE);
}
  
void ADC_Adc1Initialization(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;
  
    //ADC clk = APB2 clk / 6 = 72MHz/6 = 12MHz. MAX 14MHz.
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
    RCC_APB2PeriphClockCmd( (RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC) , ENABLE);
  
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
  
    ADC_Cmd(ADC1, DISABLE);
    ADC_DeInit(ADC1);
    ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
  
    ADC_Init(ADC1, &ADC_InitStructure);
  
    ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_7Cycles5);
  
    ADC_DMACmd(ADC1, ENABLE);
}
  
void ADC_Adc2Initialization(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;
  
    //ADC clk = APB2 clk / 6 = 72MHz/6 = 12MHz. MAX 14MHz.
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
    RCC_APB2PeriphClockCmd( (RCC_APB2Periph_ADC2 | RCC_APB2Periph_GPIOA) , ENABLE);
  
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
  
    ADC_Cmd(ADC2, DISABLE);
    ADC_DeInit(ADC2);
    ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
  
    ADC_Init(ADC2, &ADC_InitStructure);
  
    ADC_RegularChannelConfig(ADC2, ADC_Channel_3, 1, ADC_SampleTime_7Cycles5);
}
  
void TIMER1_Init(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
  
    //Enable Timer 1 clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
  
    //Base
    TIM_TimeBaseStructInit(&TIM_TimeBaseInitStructure);
    TIM_TimeBaseInitStructure.TIM_Prescaler = 0;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStructure.TIM_Period = 60167;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStructure);
  
    TIM_ARRPreloadConfig(TIM1, ENABLE);
  
    //Register with Nested Vectored Interrupt Controller (NVIC).
    NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0B;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0B;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
  
    //Clear timer
    TIM_SetCounter(TIM1, 0);
  
    //Interrupt
    TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
}
  
void TIMER1_Enable(void)
{
    //Clear timer
    TIM_SetCounter(TIM1, 0);
  
    //Enable timer
    TIM_Cmd(TIM1, ENABLE);
}
  
void TIMER1_Disable(void)
{
    //Disable timer
    TIM_Cmd(TIM1, DISABLE);
}
  
void TIM1_CC_IRQHandler(void)
{
    //Clear timer 1 compare interrupt flag
    TIM_ClearITPendingBit(TIM1, TIM_IT_CC1);
}
  
void DMA1_Channel1_IRQHandler(void)
{
    //Clear DMA Transfer complete interrupt flag
    DMA_ClearITPendingBit(DMA1_IT_TC1);
  
    //Light LED2
    LED(LED2, ON);
}

I am trying to get ADC regular dual mode with external trigger on timer 1 to work. I have read a lot of posts on this forum about ADC dual mode and some on external triggering, but I still can't get it to work. When I instead use software to start ADC conversions it all works as it should. So ADC conversions are not getting triggered by the timer interrupt i suspect.


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