STM32F0定时器触发ADC，多通道采样、DMA传输数据的配置.docx

STM32F0定时器触发ADC，多通道采样、DMA传输数据的配置 本块代码实现了定时器定时触发ADC，多通道采样，并通过DMA进行数据传输到内存的操作。 #include????"adc.h"?? [cpp]?view plain?copy #define?DMA_BUFFER_SIZE?????6?? uint8?sample_finish?=?0;?? int16?adc_dma_tab[6]?=?{?0?};?? uint8?sample_index?=?0;?? //采样点数据?? int16?sample_1[128]?=?{?0?};?? int16?sample_2[128]?=?{?0?};?? int16?sample_3[128]?=?{?0?};?? int16?sample_4[128]?=?{?0?};?? int16?sample_5[128]?=?{?0?};?? int16?sample_6[128]?=?{?0?};?? void?user_adc_init()?? {?? adc_gpio_init();?? adc_config();???????????????//?注意此处的初始化顺序，否则采样传输的数据容易出现数据错位的结果?? adc_dma_init();?????????????//?? adc_timer_init();???????????//?? }?? void?adc_config()?? {?? ADC_InitTypeDef?adc_init_structure;?? RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,?ENABLE);????????????//使能ADC时钟?? ADC_DeInit(ADC1);???????????????????????????????????????????????//复位ADC?? ADC_StructInit(&adc_init_structure);????????????????????????????//初始化ADC结构体?? adc_init_structure.ADC_ContinuousConvMode?=?DISABLE;????????????//禁用连续转换模式?? adc_init_structure.ADC_DataAlign?=?ADC_DataAlign_Right;?????????//采样数据右对齐?? adc_init_structure.ADC_ExternalTrigConv?=?ADC_ExternalTrigConv_T2_TRGO;?//外部触发设置为TIM2?? adc_init_structure.ADC_ExternalTrigConvEdge?=?ADC_ExternalTrigConvEdge_Rising;//上升沿触发?? adc_init_structure.ADC_Resolution?=?ADC_Resolution_12b;?????????//12位分辨率?? adc_init_structure.ADC_ScanDirection?=?ADC_ScanDirection_Upward;//向上扫描0-18通道?? ADC_Init(ADC1,?&adc_init_structure);?? ADC_OverrunModeCmd(ADC1,?ENABLE);???????????????????????????????//使能数据覆盖模式?? ADC_ChannelConfig(ADC1,?ADC_Channel_0?|?ADC_Channel_1?|?ADC_Channel_2?? |?ADC_Channel_8?|?ADC_Channel_14?|?ADC_Channel_15,?? ADC_SampleTime_13_5Cycles);???????????????//配置采样通道，采样时间125nS?? ADC_GetCalibrationFactor(ADC1);?????????????????????????????????//使能前校准ADC?? ADC_Cmd(ADC1,?ENABLE);??????????????????????????????????????????//使能ADC1?? while(ADC_GetFlagStatus(ADC1,?ADC_FLAG_ADEN)?==?RESET);?????????//等待ADC1使能完成?? ADC_DMACmd(ADC1,?ENABLE);???????????????????????????????????????//使能ADC_DMA??