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本帖最后由 16622723012 于 2021-4-20 14:24 编辑
[size=13.3333px]关于那个连续转换模式,ADC的转换回调函数是可以正常执行的。 [size=13.3333px]
问题:在ADC的连续转换模式下开启模拟看门狗,不能正常进入模拟看门狗的中断回调函数
[size=13.3333px]
[size=13.3333px]
[size=13.3333px]模拟看门狗的中断是这样的情况,如果ADC的电压值一开始并一直就超过模拟看门狗的阈值,单片机一启动,就会一直进入这个回调函数,但是如果ADC采集的电压一开始没有超过模拟看门狗的阈值,当adc之后超过该阈值,就不能进入这个模拟看门狗回调函数
ADC的相关设置
#include "adc.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
ADC_HandleTypeDef hadc1;
/* ADC1 init function */
void MX_ADC1_Init(void)
{
ADC_AnalogWDGConfTypeDef AnalogWDGConfig = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = DISABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the analog watchdog
*/
AnalogWDGConfig.WatchdogMode = ADC_ANALOGWATCHDOG_SINGLE_REG;
AnalogWDGConfig.HighThreshold = 3000;
AnalogWDGConfig.LowThreshold = 0;
AnalogWDGConfig.Channel = ADC_CHANNEL_5;
AnalogWDGConfig.ITMode = ENABLE;
if (HAL_ADC_AnalogWDGConfig(&hadc1, &AnalogWDGConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
*/
sConfig.Channel = ADC_CHANNEL_5;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* ADC1 clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**ADC1 GPIO Configuration
PA5 ------> ADC1_IN5
*/
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* ADC1 interrupt Init */
HAL_NVIC_SetPriority(ADC_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(ADC_IRQn);
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
}
主函数
[size=13.3333px]int main(void)
[size=13.3333px]{
[size=13.3333px] /* USER CODE BEGIN 1 */
[size=13.3333px] /* USER CODE END 1 */
[size=13.3333px] /* MCU Configuration--------------------------------------------------------*/
[size=13.3333px] /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
[size=13.3333px] HAL_Init();
[size=13.3333px] /* Configure the system clock */
[size=13.3333px] SystemClock_Config();
[size=13.3333px] MX_GPIO_Init();
[size=13.3333px] MX_ADC1_Init();
[size=13.3333px] MX_USART1_UART_Init();
[size=13.3333px] HAL_ADC_Start_IT(&hadc1);//开启ADC中断
[size=13.3333px] while (1)
[size=13.3333px] {
[size=13.3333px] HAL_GPIO_TogglePin (GPIOF,GPIO_PIN_10);
[size=13.3333px] HAL_Delay(500);
[size=13.3333px] }
第一个回调用来检验连续转换的,可以一直进入该回调函数,
第二个是模拟看门狗的回调,如果一开始并一直ADC的采集值就超过模拟看门狗的阈值,就会一直进入这个回调函数,但是如果一开始没有超过模拟看门狗的阈值,当adc之后超过该阈值,就不能进入这个模拟看门狗回调函数
/*
uint32_t adcx=0;
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if(hadc->Instance==ADC1)
{
adcx = HAL_ADC_GetValue(&hadc1);
printf("ADC转换值为: %d %d \r\n",adcx,n++);
//HAL_Delay(50);
}
HAL_ADC_Start_IT(&hadc1);//开启ADC中断
}
*/
uint32_t adcx=0;
void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc)
{
if(hadc->Instance==ADC1)
{
adcx = HAL_ADC_GetValue(&hadc1);
printf("ADC转换值为: %d %d \r\n",adcx,n++);
}
HAL_ADC_Start_IT(&hadc1);//开启ADC中断
}
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