Stm32接外置adc相关程序是什么

A：下面是Stm32接外置ADC的程序示例：

1.配置ADC工作模式和采样时间

ADC_HandleTypeDef hadc;

hadc.Instance = ADC1;

hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;

hadc.Init.Resolution = ADC_RESOLUTION_12B;

hadc.Init.ScanConvMode = DISABLE;

hadc.Init.ContinuousConvMode = DISABLE;

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 = 1;

hadc.Init.DMAContinuousRequests = DISABLE;

hadc.Init.EOCSelection = ADC_EOC_SEQ_CONV;

hadc.Init.LowPowerAutoWait = DISABLE;

hadc.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;

hadc.Init.OversamplingMode = DISABLE;

if (HAL_ADC_Init(&hadc) != HAL_OK)

{

Error_Handler();

}

ADC_ChannelConfTypeDef sConfig;

sConfig.Channel = ADC_CHANNEL_0;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;

if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

{

Error_Handler();

}

2.启动ADC转换

uint32_t adc_raw_val = 0;

if (HAL_ADC_Start(&hadc) != HAL_OK)

{

Error_Handler();

}

if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) != HAL_OK)

{

Error_Handler();

}

adc_raw_val = HAL_ADC_GetValue(&hadc);

3.停止ADC转换

if (HAL_ADC_Stop(&hadc) != HAL_OK)

{

Error_Handler();

}