Хочу запустить АЦД непрерывно на оцифровку последовательно 12 каналов, чтобы складывало с массив.
Вот код.
Не могу понять - после инициализации DMA, в его регисторах все нули.
Пробовал заускать программу - в массиве тоже все нули.
Код
//volatile u16 ADCConvertedValue[12]; <- the results are here
void adc_init(void){
ADC_InitTypeDef ADC_InitStruct;
ADC_CommonInitTypeDef ADC_CommonInitStruct;
DMA_InitTypeDef DMA_InitStructure;
// ports are already configured
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE); // enable clocking of ADC1
RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_DMA2,ENABLE); // enable clocking of DMA2
//==Configure DMA2 - Channel0 Stream 4==
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 12;
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_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_Stream4, &DMA_InitStructure);
DMA_Cmd( DMA2_Stream4, ENABLE);
// ADC:
ADC_DeInit(); // turn ADC off
ADC_CommonInitStruct.ADC_Mode =ADC_Mode_Independent;
ADC_CommonInitStruct.ADC_Prescaler =ADC_Prescaler_Div4;
ADC_CommonInitStruct.ADC_DMAAccessMode =ADC_DMAAccessMode_Disabled;
ADC_CommonInitStruct.ADC_TwoSamplingDelay =ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStruct);
ADC_StructInit(&ADC_InitStruct);
ADC_InitStruct.ADC_Resolution =ADC_Resolution_12b;
ADC_InitStruct.ADC_ScanConvMode =ENABLE;
ADC_InitStruct.ADC_ContinuousConvMode =ENABLE;
ADC_InitStruct.ADC_DataAlign =ADC_DataAlign_Right;//Left;
ADC_InitStruct.ADC_NbrOfConversion =12;
ADC_Init(ADC1,&ADC_InitStruct);
//----channels order
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1,ADC_SampleTime_480Cycles);// PC0
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2,ADC_SampleTime_480Cycles);// PC1
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3,ADC_SampleTime_480Cycles);// PC2
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4,ADC_SampleTime_480Cycles);// PC3
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 5,ADC_SampleTime_480Cycles);// PA0
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 6,ADC_SampleTime_480Cycles);// PA1
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 7,ADC_SampleTime_480Cycles);// PA2
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 8,ADC_SampleTime_480Cycles);// PA3
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 9,ADC_SampleTime_480Cycles);// PA6
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 10,ADC_SampleTime_480Cycles);// PA7
ADC_RegularChannelConfig(ADC1, ADC_Channel_14,11,ADC_SampleTime_480Cycles);// PC4
ADC_RegularChannelConfig(ADC1, ADC_Channel_15,12,ADC_SampleTime_480Cycles);// PC5
// enable ADC and DMA:
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE); //Enable ADC1 DMA
ADC_Cmd(ADC1, ENABLE); //Enable ADC1
ADC_SoftwareStartConv(ADC1); // start ADC conversions
}
//-----------------------------
void adc_init(void){
ADC_InitTypeDef ADC_InitStruct;
ADC_CommonInitTypeDef ADC_CommonInitStruct;
DMA_InitTypeDef DMA_InitStructure;
// ports are already configured
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE); // enable clocking of ADC1
RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_DMA2,ENABLE); // enable clocking of DMA2
//==Configure DMA2 - Channel0 Stream 4==
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 12;
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_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_Stream4, &DMA_InitStructure);
DMA_Cmd( DMA2_Stream4, ENABLE);
// ADC:
ADC_DeInit(); // turn ADC off
ADC_CommonInitStruct.ADC_Mode =ADC_Mode_Independent;
ADC_CommonInitStruct.ADC_Prescaler =ADC_Prescaler_Div4;
ADC_CommonInitStruct.ADC_DMAAccessMode =ADC_DMAAccessMode_Disabled;
ADC_CommonInitStruct.ADC_TwoSamplingDelay =ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStruct);
ADC_StructInit(&ADC_InitStruct);
ADC_InitStruct.ADC_Resolution =ADC_Resolution_12b;
ADC_InitStruct.ADC_ScanConvMode =ENABLE;
ADC_InitStruct.ADC_ContinuousConvMode =ENABLE;
ADC_InitStruct.ADC_DataAlign =ADC_DataAlign_Right;//Left;
ADC_InitStruct.ADC_NbrOfConversion =12;
ADC_Init(ADC1,&ADC_InitStruct);
//----channels order
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1,ADC_SampleTime_480Cycles);// PC0
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2,ADC_SampleTime_480Cycles);// PC1
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3,ADC_SampleTime_480Cycles);// PC2
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4,ADC_SampleTime_480Cycles);// PC3
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 5,ADC_SampleTime_480Cycles);// PA0
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 6,ADC_SampleTime_480Cycles);// PA1
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 7,ADC_SampleTime_480Cycles);// PA2
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 8,ADC_SampleTime_480Cycles);// PA3
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 9,ADC_SampleTime_480Cycles);// PA6
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 10,ADC_SampleTime_480Cycles);// PA7
ADC_RegularChannelConfig(ADC1, ADC_Channel_14,11,ADC_SampleTime_480Cycles);// PC4
ADC_RegularChannelConfig(ADC1, ADC_Channel_15,12,ADC_SampleTime_480Cycles);// PC5
// enable ADC and DMA:
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE); //Enable ADC1 DMA
ADC_Cmd(ADC1, ENABLE); //Enable ADC1
ADC_SoftwareStartConv(ADC1); // start ADC conversions
}
//-----------------------------
Проц stm32f407, J-Link, Keil 4.23