stm32hal库 adc采集多通道

以下是使用HAL库在STM32F030上进行ADC多通道采集的方法：

1. 配置ADC时钟和GPIO引脚

RCC->APB2ENR |= RCC_APB2ENR_ADCEN; // 使能ADC时钟
RCC->AHBENR |= RCC_AHBENR_GPIOAEN; // 使能GPIOA时钟

GPIOA->MODER |= GPIO_MODER_MODER0; // 配置PA0为模拟输入
GPIOA->MODER |= GPIO_MODER_MODER1; // 配置PA1为模拟输入

2. 配置ADC

ADC_HandleTypeDef hadc;

hadc.Instance = ADC1;
hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc.Init.Resolution = ADC_RESOLUTION_12B;
hadc.Init.ScanConvMode = ENABLE;
hadc.Init.ContinuousConvMode = ENABLE;
hadc.Init.DiscontinuousConvMode = DISABLE;
hadc.Init.NbrOfDiscConversion = 0;
hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc.Init.NbrOfConversion = 2;
hadc.Init.DMAContinuousRequests = DISABLE;
hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
HAL_ADC_Init(&hadc);

3. 配置ADC通道

ADC_ChannelConfTypeDef sConfig;

sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&hadc, &sConfig);

sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = 2;
HAL_ADC_ConfigChannel(&hadc, &sConfig);

4. 启动ADC转换

HAL_ADC_Start(&hadc);

5. 读取ADC转换值

uint32_t adc_value[2];
HAL_ADC_PollForConversion(&hadc, 100);
adc_value[0] = HAL_ADC_GetValue(&hadc);
HAL_ADC_PollForConversion(&hadc, 100);
adc_value[1] = HAL_ADC_GetValue(&hadc);