STM32F373RB ADC+DMA+Interrupt

Sorry, nobody has provided me with an F373 board,

// STM32 ADC 1UP DMA TIM STM32F3-Discovery - sourcer32@gmail.com
/**************************************************************************************/
// ADC1 ADC2 ADC3 ADC4
// IN1 PA0* PA4 PB1 PE14*
// IN2 PA1 PA5* PE9* PE15*
// IN3 PA2 PA6* PE13* PB12
// IN4 PA3 PA7* --- PB14
// IN5 PF4 PC4 PB13 PB15
//
// *Used on STM32F3-Discovery
// Free pins located in STM32F3-Discovery manual, UM1570
// ADC1 Trigger EXT3 TIM2_CC2
// Pins for this example PA1, PA4, PB1, PB12
/**************************************************************************************/
#include ''stm32f3_discovery.h''
#include ''stm32f30x.h''
/**************************************************************************************/
#define BUFSIZE 10
volatile uint16_t ADCConvertedValues[BUFSIZE];
uint16_t CalibrationValue;
/**************************************************************************************/
void ADC_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOA Periph clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* ADC Channels configuration */
/* Configure PA1 as analog input */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/**************************************************************************************/
void ADC12_DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* Enable DMA1 clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* DMA configuration */
/* DMA1 Channel1 Init Test */
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR; // The register of a singular ADC
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCConvertedValues[0];
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = BUFSIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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_Medium;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure); // ADC1
}
/**************************************************************************************/
void ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
volatile int i;
/* Configure the ADC clocks */
RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div1);
/* Enable ADC1/2 clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);
/* ADC GPIO configuration */
ADC_GPIO_Configuration();
/* ADC DMA Channel configuration */
ADC12_DMA_Configuration();
/* ADC Calibration procedure */
ADC_VoltageRegulatorCmd(ADC1, ENABLE);
/* Insert delay equal to 10 µs */
for(i=0; i<10000; i++);
ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) != RESET );
CalibrationValue = ADC_GetCalibrationValue(ADC1);
/* ADC configuration */
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; // Not Multi Mode
ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = 10;
ADC_CommonInit(ADC1, &ADC_CommonInitStructure);
/* */
ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable; // Triggered
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_3; // ADC1/2 EXT3 TIM2_CC2
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_RisingEdge;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 1, ADC_SampleTime_61Cycles5); // PA1
/* Configures the ADC DMA */
ADC_DMAConfig(ADC1, ADC_DMAMode_Circular);
/* Enable the ADC DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* wait for ADC1 ADRDY */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY));
/* Enable the DMA channel */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* Start ADC1 Software Conversion */
ADC_StartConversion(ADC1);
}
/**************************************************************************************/
void TIM2_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* Enable TIM2 Peripheral clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_Period = (SystemCoreClock / 50) - 1; // 50 Hz Sample Rate
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* PWM1 Mode configuration: Channel 2 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 10; // Some arbitary width
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_Cmd(TIM2, ENABLE);
}
/**************************************************************************************/
void DMA1_Channel1_IRQHandler(void) // 5 Hz
{
/* Test on DMA1 Channel1 Transfer Complete interrupt */
if(DMA_GetITStatus(DMA1_IT_TC1))
{
/* Clear DMA1 Channel1 Half Transfer, Transfer Complete and Global interrupt pending bits */
DMA_ClearITPendingBit(DMA1_IT_GL1); // DMA1_IT_TC1 would suffice
STM_EVAL_LEDToggle(LED3); // 2.5 Hz
}
}
/**************************************************************************************/
void TIM2_IRQHandler(void) // 50 Hz
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
STM_EVAL_LEDToggle(LED4); // 25 Hz
}
}
/**************************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the DMA1 CH1 and TIM2 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_Init(&NVIC_InitStructure);
}
/**************************************************************************************/
int main(void)
{
/* Initialize LEDs available on STM32F-Discovery board */
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Turn on LD3 */
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
NVIC_Configuration();
TIM2_Configuration();
ADC_Configuration();
/* Enable DMA1 Channel1 Transfer Complete interrupt */
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
/* TIM Interrupts enable */
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
while(1); // Don't want to exit
}
/**************************************************************************************/
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d

'', file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**************************************************************************************/

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Dear community,

to use the ADC and the DMA together the STM32F373 requires

ADC_SoftwareStartConv(ADC1); // found by trial and error

Here is a working initialization for those who are searching for C&P Code (like me):

void ADC_1_Init() {
GPIO_InitTypeDef GPIO_InitStructure; 
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure; //DMA Interupt
//*******CLOCK enable
// Enable DMA1 clock 
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
// Enable ADC1 clock 
RCC_ADCCLKConfig(RCC_PCLK2_Div2); 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); 
//Enable GPIO Clock
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
// Configure PB.12 (ADC Channel8) in analog mode 
//GPIO init
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PC0 --> ADC_IN10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure); 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //PC1 --> ADC_IN11
GPIO_Init(GPIOC, &GPIO_InitStructure);
//DMA1 Channel1 configuration 
DMA_DeInit(DMA1_Channel1); 
DMA_InitStructure.DMA_BufferSize = sizeof(ADC1_Buffer); 
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC1_Buffer; //(uint32_t)&ADC1->DR
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; 
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //DMA_Mode_Normal; //
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
//DMA_IT_TC: Transfer complete interrupt mask 
//DMA_IT_HT: Half transfer interrupt mask 
//DMA_IT_TE: Transfer error interrupt mask
// Enable DMA1 channel6 IRQ Channel
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ADC_Prio;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = ADC_subPrio;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
// ADC1 configuration 
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //Enable for multichannel mode
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //Enable for conti mode
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO;// ADC_ExternalTrigConv_T2_CC2; //Trigger 
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_1Cycles5); 
// Enable ADC1 DMA 
ADC_DMACmd(ADC1, ENABLE); 
// Enable ADC1 
ADC_Cmd(ADC1, ENABLE); 
// ADC1 reset calibration register 
ADC_ResetCalibration(ADC1); 
while(ADC_GetResetCalibrationStatus(ADC1)); 
//ADC1 calibration start 
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1)); 
ADC_Cmd(ADC1, ENABLE);
ADC_SoftwareStartConv(ADC1); //this needs to be called 
}
void DMA1_Channel1_IRQHandler() {
if(DMA_GetFlagStatus(DMA1_IT_TC1) != RESET) {
ADC_Cmd(ADC1, DISABLE); 
}
DMA_ClearITPendingBit(DMA1_IT_GL1); 
}