STM32F1 Timer ADC Trigger Don't working

[ferhatyol-23]

Posted on June 16, 2017 at 11:12

Hello there

I am trying to trigger the ADC with Tim3. But I could not work it. My goal is to get a certain number of samples through ADC Timer and DMA

This is My ADC configuration code.

&sharpinclude 'stm32f10x.h'

&sharpinclude 'Adc.h'

uint16_t ADC_ConvertedValue[128];

/*ADC baslanagic ayarlari yuklenme islemini yapar */

void ADC1_Configuration(){ ADC_InitTypeDef ADC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);

/* ADC pin analog input yapiliyor */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOB, &GPIO_InitStructure);

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_CC1; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfChannel = 1; ADC_Init(ADC1, &ADC_InitStructure);

/* Ch8 PB0 */

ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_55Cycles5);

ADC_Cmd(ADC1, ENABLE);

ADC_DMACmd(ADC1,ENABLE); ADC_ExternalTrigConvCmd(ADC1,ENABLE);

/* ADC1 Reset Kalibrasyonu yapilacak */

ADC_ResetCalibration(ADC1); /* Kalibrasyon bekleniyor */ while(ADC_GetResetCalibrationStatus(ADC1));

/* ADC1 calibrasyonu yapilacak */

ADC_StartCalibration(ADC1); /* Kalibrasyon bekleniyor */ while(ADC_GetCalibrationStatus(ADC1)); }

void DMA1_Configuration(void)

{ DMA_InitTypeDef DMA_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /*DMA Clock Aktif Ediliyor*/ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

/* DMA Ayarlar1 Yapiliyor */

DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue[0]; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; 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_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1, &DMA_InitStructure); /* Enable the DMA1 TC Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* DMA Transfer Complete interrupt Enable*/ DMA_ITConfig(DMA1_Channel1,DMA1_IT_TC1,ENABLE);

/* Enable DMA1 channel1 */

DMA_Cmd(DMA1_Channel1, ENABLE);}

void TIM3_Configuration(void)

{ TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /*Enable TIM3 Clock*/ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); TIM_DeInit(TIM3); TIM_TimeBaseStructure.TIM_Period = 999; TIM_TimeBaseStructure.TIM_Prescaler = 35; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 1; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC1Init(TIM3, &TIM_OCInitStructure); TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_OC1); TIM_ARRPreloadConfig(TIM3, ENABLE); TIM_Cmd(TIM3, ENABLE);}

void ADC_init(void)

{ DMA1_Configuration(); ADC1_Configuration(); TIM3_Configuration();}

DMA needs to create continuous interrupt.  But there is only one interrupt occurs

What can be the problem?

Thank you

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

[ferhatyol-23]

Posted on June 16, 2017 at 13:16

There's just a problem with interrupt, 

Because Timer ADC and DMA is working. But the DMA TC interrupt occurs only once. I did not understand the problem.