AVF (06.12.2013 21:19, просмотров: 116) ответил pav256 на Не работает ADC->DMA в STM32F4пример инициализации для F2, только количество выборок по одной, на каждый канал, чтобы было несколько надо CircularMode. у меня запуск по шиму таймера, каждые 10 мс
void adc_cfg(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_ClocksTypeDef RCC_Clocks;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// RCC - Enable peripheral clocks
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
// // //NVIC
// NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQn;
// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;
// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
//
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//GPIO
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// Timer TIM2
RCC_GetClocksFreq(&RCC_Clocks);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = RCC_Clocks.SYSCLK_Frequency/10000;
TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// TIM2 channel1 configuration in PWM mode
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = RCC_Clocks.SYSCLK_Frequency/20000;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
// DMA
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&resultADC[0];
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Base;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = NUMADCCH;
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_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
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);
DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);
// ADC
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_10Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = NUMADCCH;
ADC_Init(ADC1, &ADC_InitStructure);
// Scan Channels
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_84Cycles); // PA6 - ADC_IN6 - ADC_T
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 2, ADC_SampleTime_84Cycles); // PB0 - ADC_IN14 - CUR_MON
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 3, ADC_SampleTime_84Cycles); // PB1 - ADC_IN15 - VIN
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 4, ADC_SampleTime_84Cycles); // PC5 - ADC_IN9 - HV_MON
ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 5, ADC_SampleTime_480Cycles); // ADC_IN16 - Temperature
ADC_RegularChannelConfig(ADC1, ADC_Channel_17, 6, ADC_SampleTime_480Cycles); // ADC_IN17 - IntVref
// ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 2, ADC_SampleTime_15Cycles); // PA7 - ADC_IN7 - VMAG
// ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 5, ADC_SampleTime_15Cycles); // PC4 - ADC_IN8 - VPW3
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
ADC_TempSensorVrefintCmd(ENABLE);
// TIM2 counter enable
TIM_Cmd(TIM2, ENABLE);
}