前言：

最近在调试STM32L152芯片ADC单通道采集数据程序，总结下STM32L152芯片ADC单通道采集模拟量的使用方法。

硬件平台：STM32L152

软件平台：keil v5+cubeMX

函数库：HAL库

ADC配置过程：

1.先初始化ADC的管脚，本例中ADC对应PA1管脚。

ADC_HandleTypeDef hadc; void ADC_GPIO_Init(void) {   GPIO_InitTypeDef GPIO_InitStructure;  /*Configure GPIO pin : PA1 */   GPIO_InitStructure.Pin  = GPIO_PIN_1;                                     GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;   GPIO_InitStructure.Pull = GPIO_NOPULL;   HAL_GPIO_Init(ADC1_GPIO, &GPIO_InitStructure); }

2.初始化ADC的各参数

void MX_ADC_Init(void) {   ADC_ChannelConfTypeDef sConfig; /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */   hadc.Instance = ADC1;   hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;//时钟分频   hadc.Init.Resolution = ADC_RESOLUTION_12B;//ADC的分辨率   hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;//右对齐，低12有效   hadc.Init.ScanConvMode = ADC_SCAN_DISABLE;//关闭浏览模式，即单通道有效   hadc.Init.EOCSelection = ADC_EOC_SEQ_CONV;   hadc.Init.LowPowerAutoWait = ADC_AUTOWAIT_DISABLE;   hadc.Init.LowPowerAutoPowerOff = ADC_AUTOPOWEROFF_DISABLE;   hadc.Init.ChannelsBank = ADC_CHANNELS_BANK_A;   hadc.Init.ContinuousConvMode = DISABLE;   //单次转化模式   hadc.Init.NbrOfConversion = 1;//通道数量   hadc.Init.DiscontinuousConvMode = DISABLE;   hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;// 软件触发   hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;   hadc.Init.DMAContinuousRequests = DISABLE;   if (HAL_ADC_Init(&hadc) != HAL_OK)   {     _Error_Handler(__FILE__, __LINE__);   } /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */   sConfig.Channel = ADC1_Channel;   sConfig.Rank = 1;   sConfig.SamplingTime = ADC_SAMPLETIME_4CYCLES;   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)   {     _Error_Handler(__FILE__, __LINE__);   } }

3.获取ADC采集数据

u16 ADC_ReadData(void) { static u16 AD_Data; HAL_ADC_Start(&hadc); HAL_ADC_PollForConversion(&hadc,100); AD_Data=(u16)HAL_ADC_GetValue(&hadc); HAL_ADC_Stop(&hadc); delay_ms(5); return AD_Data; }

4.获取采集数据进行平均

u16 ADC_average(u8 times) { u32 sum=0,i,adc_average; for(i=0;i<times;i++) { sum+=ADC_ReadData(); } adc_average=sum/times; return adc_average; }

需要获取ADC数据时直接调用ADC_average函数即可。