STM32F103单片机ADC采用TIM1_CC1事件触发代码实现
时间: 2023-08-02 20:05:25 浏览: 226
以下是基于STM32CubeMX和HAL库的代码实现:
1. 配置TIM1和ADC时钟
```
/* TIM1 clock enable */
__HAL_RCC_TIM1_CLK_ENABLE();
/* ADC1 clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
```
2. 配置GPIO引脚和时钟
```
/* Configure GPIO pin : PA8 */
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
```
3. 配置TIM1为输入捕获模式,配置ADC为单通道转换模式
```
/* TIM1 configuration */
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 65535;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
HAL_TIM_IC_Init(&htim1);
/* Configure the Input Capture channel */
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
HAL_TIM_IC_ConfigChannel(&htim1, &sConfig, TIM_CHANNEL_1);
/* ADC configuration */
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
HAL_ADC_Init(&hadc1);
/* Configure Regular Channel */
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
```
4. 配置TIM1的触发源和开启TIM1和ADC
```
/* Configure the TIM1 trigger */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_OC1;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig);
/* Start TIM1 */
HAL_TIM_IC_Start_IT(&htim1, TIM_CHANNEL_1);
/* Start ADC conversion */
HAL_ADC_Start(&hadc1);
```
5. 在TIM1的输入捕获中断中进行ADC采样
```
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if(htim->Instance == TIM1)
{
/* Start ADC conversion */
HAL_ADC_Start(&hadc1);
}
}
```
6. 在ADC转换完成中断中获取采样值
```
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
/* Get ADC value */
uint16_t adc_value = HAL_ADC_GetValue(hadc);
/* Do something with the ADC value */
...
}
```
以上是基于STM32CubeMX和HAL库的代码实现,需要根据实际情况进行修改。
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