STM32F4多通道ADC转换.docx

#include stm32f4_discovery.h#include #define ADC1_DR_Address (uint32_t)0X4001204C) _IO uint16_t AD_Value4 = 0,0,0,0; / 0-3 store Voltage value, 4 store temperature value._IO uint32_t ADC1ConvertedVolt_0 = 0;_IO uint32_t ADC1ConvertedVolt_1 = 0;_IO uint32_t ADC1ConvertedVolt_2 = 0;_IO uint32_t ADC1ConvertedVolt_3 = 0;void ADC1_DMA_Config(void);int main(void)ADC1_DMA_Config();/* Start ADC1 Software Conversion */ ADC_SoftwareStartConv(ADC1);while(1)ADC1ConvertedVolt_0 = AD_Value0 *3300/0xFFF;ADC1ConvertedVolt_1 = AD_Value1 *3300/0xFFF;ADC1ConvertedVolt_2 = AD_Value2 *3300/0xFFF;ADC1ConvertedVolt_3 = AD_Value3 *3300/0xFFF;void ADC1_DMA_Config(void)ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; DMA_InitTypeDef DMA_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; /* Enable ADC1, DMA2 and GPIO clocks */ADC1 in DMA2 channel_0 , Stream0 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC, ENABLE); /DMA2,GPIO use AHB1 BUS RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); /ADC use APB2 BUS DMA_InitStructure.DMA_Channel = DMA_Channel_0; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address; /ADC1 DATA ADDRESS DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&AD_Value; /DMA memory base address DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStructure.DMA_BufferSize = 4; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; /periphera inc mode: when have multi peripheras need to use DMA 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; /need continue visit 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_Stream0, &DMA_InitStructure); DMA_Cmd(DMA2_Stream0, ENABLE);/ config GPIO GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; GPIO_Init(GPIOC, &GPIO_InitStructure); /* ADC Common Init */ ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; /if doubul ADC channels need to synchronous, set dependent. ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; /ADC_delay_between_2_sampling_phases ADC_CommonInit(&ADC_CommonInitStructure); /* ADC1 Init */ ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ScanConvMode = ENABLE; /if used multi channels set enable ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; /software trig,need function to start:ADC_SoftwareStartConv(ADC3); others: extern trig or timer trig ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; /right align ADC_InitStructure.ADC_NbrOfConversion = 4; /when have 7 channels analoy need to conv,set =7 ADC_Init(ADC1, &ADC_InitStructure);ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_15Cycles);ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_15Cycles);ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_15Cycles);ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4, ADC_SampleTime_15Cycles); ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE); /if not have this function , cant get new value /* Enable ADC1 DMA */ ADC_DMACmd(ADC1, ENABLE); /make enable ADC1 WITH DMA2 /* Enable ADC1 */ ADC_Cmd(ADC1, ENABLE);#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(