基于stm32f103c8t6的ADC接口配置示例
时间: 2023-09-04 16:06:42 浏览: 440
以下是基于stm32f103c8t6的ADC接口配置示例:
1. 首先需要在STM32CubeMX中配置ADC接口,选择ADC1,并设置采样时间和分辨率等参数。
2. 在主函数中初始化ADC接口:
```c
/* ADC1 init function */
static void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
/* Enable peripheral clocks */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/* Configure GPIO pins */
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure ADC */
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
HAL_ADC_Init(&hadc1);
/* Configure ADC channel */
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}
```
3. 在需要采样的时候,调用以下代码进行单次采样:
```c
ADC_HandleTypeDef hadc1;
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(adcHandle->Instance==ADC1)
{
/* ADC1 clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN0
*/
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
}
int main(void)
{
/* Init ADC */
MX_ADC1_Init();
/* Start ADC conversion */
HAL_ADC_Start(&hadc1);
/* Wait for ADC conversion to complete */
HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
/* Read ADC value */
uint16_t adc_value = HAL_ADC_GetValue(&hadc1);
/* Do something with ADC value */
while (1)
{
/* Infinite loop */
}
}
```
以上就是基于stm32f103c8t6的ADC接口配置示例。需要注意的是,ADC采样时需要配置GPIO为模拟输入模式。同时,ADC采样时间和分辨率等参数也需要根据具体应用进行配置。
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