STM32F429 Disco Timer ADC Trigger Problem

[ferhatyol-23]

Posted on January 15, 2017 at 15:55

Hi 

I'm trying to do an ADC Timer Trigger. What I want to do is trigger the ADC with 1kHz. To do this, I used Timer 2, ADC3 and DMA. I also activated the DMA Transfer Complete interrupt. The ADC is running in continuous mode but I could not run it with timer trigger.  There must be a problem. Timer is not working.

This is my initial code 

void ADC3_CH12_DMA_Config(void)//ADC Pin Portc.2

{ ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; DMA_InitTypeDef DMA_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

/* Enable ADC3, DMA2, TIM2 and GPIO clocks ****************************************/

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC | RCC_APB1Periph_TIM2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE); /* Enable the DMA Stream IRQ Channel */ NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* Enable the DMA Stream IRQ Channel */

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = 999; //Each 1Khz TIM_TimeBaseStructure.TIM_Prescaler = 90-1; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

TIM_Cmd(TIM2, ENABLE);

/* DMA2 Stream0 channel0 configuration **************************************/ DMA_InitStructure.DMA_Channel = DMA_Channel_2; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStructure.DMA_BufferSize = 1; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA2_Stream0, &DMA_InitStructure); DMA_Cmd(DMA2_Stream0, ENABLE); DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);

/* Configure ADC3 Channel12 pin as analog input ******************************/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; GPIO_Init(GPIOC, &GPIO_InitStructure); /* ADC Common Init **********************************************************/ ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; ADC_CommonInit(&ADC_CommonInitStructure);

/* ADC3 Init ****************************************************************/

ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_TRGO; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfConversion = 1; ADC_Init(ADC3, &ADC_InitStructure);

ADC_EOCOnEachRegularChannelCmd(ADC3, DISABLE);

/* ADC3 regular channel12 configuration *************************************/

ADC_RegularChannelConfig(ADC3, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

/* Enable DMA request after last transfer (Single-ADC mode) */

ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);

/* Enable ADC3 DMA */

ADC_DMACmd(ADC3, ENABLE);

/* Enable ADC3 */

ADC_Cmd(ADC3, ENABLE);}

/***********************************************************************/

void DMA2_Stream0_IRQHandler(void){

DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);

STM_EVAL_LEDToggle(LED3);

}

What could be the problem? Thanks 

#trigger #adc #stm32 #timer #stm32-timer-adc-trigger

[S.Ma]

Posted on January 15, 2017 at 20:03

Use a timer cc gpio and feed the pulse signal to the adc proper trigger gpio pin. ADC should be in waiting for trigger mode instead of continuous mode. With the trigger signal accessible, you can override it manually and see if the adc runs conversion.

[Tesla DeLorean]

Posted on January 15, 2017 at 21:51

TIM2 is on APB1 not AHB1

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

[ferhatyol-23]

Posted on January 16, 2017 at 09:50

Clive One wrote:

TIM2 is on APB1 not AHB1

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

Hi Clive

Yes I missed it.And now I fixed it, but again the ADC does not trigger.I also tried it in Tim OC mode and it did not work.

Finally this is my initial code

void ADC3_CH12_DMA_Config(void)//ADC Pin Portc.2

{ ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; DMA_InitTypeDef DMA_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /* Enable ADC3, DMA2, TIM2 and GPIO clocks ****************************************/ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC , ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3 | RCC_APB1Periph_TIM2, ENABLE); /* Enable the DMA Stream IRQ Channel */ NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = 999; //Each 1Khz TIM_TimeBaseStructure.TIM_Prescaler = 90-1; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_Pulse = 1; TIM_OCInitStructure.TIM_OutputState = ENABLE; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;

TIM_OC3Init(TIM2, &TIM_OCInitStructure);

TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);

TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

TIM_Cmd(TIM2, ENABLE);

/* DMA2 Stream0 channel0 configuration **************************************/ DMA_InitStructure.DMA_Channel = DMA_Channel_2; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStructure.DMA_BufferSize = 1; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA2_Stream0, &DMA_InitStructure); DMA_Cmd(DMA2_Stream0, ENABLE); DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);

/* Configure ADC3 Channel12 pin as analog input ******************************/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; GPIO_Init(GPIOC, &GPIO_InitStructure); /* ADC Common Init **********************************************************/ ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; ADC_CommonInit(&ADC_CommonInitStructure);

/* ADC3 Init ****************************************************************/

ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC3; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfConversion = 1; ADC_Init(ADC3, &ADC_InitStructure);

ADC_EOCOnEachRegularChannelCmd(ADC3, DISABLE);

/* ADC3 regular channel12 configuration *************************************/

ADC_RegularChannelConfig(ADC3, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

/* Enable DMA request after last transfer (Single-ADC mode) */

ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);

/* Enable ADC3 DMA */

ADC_DMACmd(ADC3, ENABLE);

/* Enable ADC3 */

ADC_Cmd(ADC3, ENABLE); }

I do not know where I made a mistake. @

Centauris.Alpha

Can you give me a sample code?

Thanks

[Tesla DeLorean]

Posted on January 16, 2017 at 22:41 The original post was too long to process during our migration. Please click on the provided URL to read the original post. https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I6fQ&d=%2Fa%2F0X0000000bsl%2FhFFyHc8k6SxhdoXdUDblJkPUlCsvlhP5T6DCR1s24rs&asPdf=false