Posted on February 25, 2016 at 17:16
It works perfectly but I have to modify to only sample one channel for each ADC1 and ADC2.
First solution I change 2nd channel in each ADC identical to 1st channel. So ADC1 sample channel 11 twice and ADC2 sample channel 12 twice. It works without any problem but it is stupid way.
Standard peripheral is far better than this new hal library. Anyway, I modify the example file included in projects. The example file is for sampling 2x2 channels in scan mode.
It works perfectly but I have to modify to only sample one channel for each ADC1 and ADC2.
First solution I change 2nd channel in each ADC identical to 1st channel. So ADC1 sample channel 11 twice and ADC2 sample channel 12 twice. It works without any problem but it is stupid way.
/* ADC1 regular channels 10, 11 configuration */
//ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);
//ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_3Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_480Cycles);ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_480Cycles);
/* ADC2 regular channels 11, 12 configuration */
//ADC_RegularChannelConfig(ADC2, ADC_Channel_11, 1, ADC_SampleTime_3Cycles);
//ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 2, ADC_SampleTime_3Cycles);
ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 1, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 2, ADC_SampleTime_480Cycles);
/* Includes ------------------------------------------------------------------*/
#include ''stm32f4xx.h''
#include ''stm32f4_discovery.h''
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC_CCR_ADDRESS ((uint32_t)0x40012308)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint16_t aADCDualConvertedValue[2];
/* Private function prototypes -----------------------------------------------*/
static void DMA_Config(void);
static void GPIO_Config(void);
static void ADC1_CH11_Config(void);
static void ADC2_CH12_Config(void);
/* Private functions ---------------------------------------------------------*/
int main(void)
{
ADC_CommonInitTypeDef ADC_CommonInitStructure;
/* Enable peripheral clocks *************************************************/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE);
/* DMA2 Stream0 channel0 configuration **************************************/
DMA_Config();
/* ADCs configuration ------------------------------------------------------*/
/* Configure ADC 11, 12 pin as analog input */
GPIO_Config();
/* ADC Common Init */
ADC_CommonInitStructure.ADC_Mode = ADC_DualMode_RegSimult;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div8;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
/* ADC1 regular channels 11 configuration */
ADC1_CH11_Config();
/* ADC2 regular channels 12 configuration */
ADC2_CH12_Config();
/* Enable DMA request after last transfer (Multi-ADC mode) */
ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC2 */
ADC_Cmd(ADC2, ENABLE);
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConv(ADC1);
while (1)
{
}
}
/**
* @brief ADC1 regular channels 11 configuration
* @param None
* @retval None
*/
static void ADC1_CH11_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channels 11 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_480Cycles);
}
/**
* @brief ADC2 regular channels 12 configuration
* @param None
* @retval None
*/
static void ADC2_CH12_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC2, &ADC_InitStructure);
/* ADC2 regular channels 12 configuration */
ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 1, ADC_SampleTime_480Cycles);
}
/**
* @brief DMA Configuration
* @param None
* @retval None
*/
static void DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&aADCDualConvertedValue;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC_CCR_ADDRESS;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 2;
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_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
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);
/* DMA2_Stream0 enable */
DMA_Cmd(DMA2_Stream0, ENABLE);
}
/**
* @brief Configure ADC Channels 11, 12 pins as analog inputs
* @param None
* @retval None
*/
static void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* ADC Channel 11 -> PC1
ADC Channel 12 -> PC2
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
#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
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/