uint32_t adc_value = HAL_ADC_GetValue(&ADC_InitStruct);获取的值是什么值,二进制的吗?
时间: 2024-05-21 19:11:09 浏览: 9
ADC_HandleTypeDef* hadc );
This function returns the current value of the ADC conversion. It takes as input the handle to the ADC peripheral which is obtained using the HAL_ADC_Init() function. The returned value is a 32-bit unsigned integer representing the current value of the ADC conversion. This value is usually in the range of 0 to 4095, depending on the ADC resolution and voltage range configuration.
相关问题
用HAL库写GET_ADC(uint8_t ch)函数,实现读取PA3 PA4口
好的,下面是用HAL库写GET_ADC(uint8_t ch)函数的代码实现:
```c
#include "stm32f1xx_hal.h"
ADC_HandleTypeDef hadc1;
/**
* @brief Initializes the ADC MSP.
* @param hadc: ADC handle
* @retval None
*/
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hadc->Instance==ADC1)
{
/* Peripheral clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**ADC1 GPIO Configuration
PA3 ------> ADC1_IN3
PA4 ------> ADC1_IN4
*/
GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
}
/**
* @brief DeInitializes the ADC MSP.
* @param hadc: ADC handle
* @retval None
*/
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)
{
if(hadc->Instance==ADC1)
{
/* Peripheral clock disable */
__HAL_RCC_ADC1_CLK_DISABLE();
/**ADC1 GPIO Configuration
PA3 ------> ADC1_IN3
PA4 ------> ADC1_IN4
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_3|GPIO_PIN_4);
}
}
/**
* @brief Get ADC value.
* @param ch: ADC channel.
* @retval ADC value.
*/
uint16_t GET_ADC(uint8_t ch)
{
ADC_ChannelConfTypeDef sConfig = {0};
uint16_t adc_value;
/* Initialize 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;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/* Configure ADC channel */
sConfig.Channel = ch == 0 ? ADC_CHANNEL_3 : ADC_CHANNEL_4;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* Start ADC conversion */
if (HAL_ADC_Start(&hadc1) != HAL_OK)
{
Error_Handler();
}
/* Wait for ADC conversion to complete */
if (HAL_ADC_PollForConversion(&hadc1, 100) != HAL_OK)
{
Error_Handler();
}
/* Get ADC value */
adc_value = HAL_ADC_GetValue(&hadc1);
/* Stop ADC conversion */
if (HAL_ADC_Stop(&hadc1) != HAL_OK)
{
Error_Handler();
}
/* De-initialize ADC */
HAL_ADC_DeInit(&hadc1);
return adc_value;
}
```
调用方式为:
```c
uint16_t adc_value1, adc_value2;
adc_value1 = GET_ADC(0); // 读取PA3口的ADC值
adc_value2 = GET_ADC(1); // 读取PA4口的ADC值
```
这段代码会初始化ADC,并通过GET_ADC函数读取指定的ADC通道上的值。
解析代码extern __IO uint16_t ADC1_Value; extern __IO uint16_t ADC2_Value; ADC_HandleTypeDef hadc1; ADC_HandleTypeDef hadc2; void MX_ADC1_Init(void){ ADC_ChannelConfTypeDef sConfig; hadc1.Instance = ADC1; hadc1.Init.ScanConvMode = ADC_SCAN_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; if (HAL_ADC_Init(&hadc1) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } sConfig.Channel = ADC_CHANNEL_4; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }} void MX_ADC2_Init(void){ ADC_ChannelConfTypeDef sConfig; hadc2.Instance = ADC2; hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc2.Init.ContinuousConvMode = DISABLE; hadc2.Init.DiscontinuousConvMode = DISABLE; hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc2.Init.NbrOfConversion = 1; if (HAL_ADC_Init(&hadc2) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } sConfig.Channel = ADC_CHANNEL_5; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }} void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle){ GPIO_InitTypeDef GPIO_InitStruct; if(adcHandle->Instance==ADC1) { __HAL_RCC_ADC1_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_4; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0); HAL_NVIC_EnableIRQ(ADC1_2_IRQn); } else if(adcHandle->Instance==ADC2) { __HAL_RCC_ADC2_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_5; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0); HAL_NVIC_EnableIRQ(ADC1_2_IRQn); }} void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle){ if(adcHandle->Instance==ADC1) { __HAL_RCC_ADC1_CLK_DISABLE(); HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4); } else if(adcHandle->Instance==ADC2) { __HAL_RCC_ADC2_CLK_DISABLE(); HAL_GPIO_DeInit(GPIOA, GPIO_PIN_5); }} void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadcx){ if(hadcx==&hadc1){ ADC1_Value=HAL_ADC_GetValue(hadcx);} if(hadcx==&hadc2){ ADC2_Value=HAL_ADC_GetValue(hadcx);}}
这段代码是一个使用 STM32 的 ADC(模数转换器)的程序。它初始化了两个 ADC 实例,分别为 ADC1 和 ADC2,并配置了它们的参数。其中,ADC1 的采样通道为 4,ADC2 的采样通道为 5。在初始化过程中,还对 ADC 的外部触发进行了配置。在 ADC 转换完成后,会调用 HAL_ADC_ConvCpltCallback 回调函数,将转换结果存储在 ADC1_Value 和 ADC2_Value 中。同时,该程序还定义了 HAL_ADC_MspInit 和 HAL_ADC_MspDeInit 函数,用于初始化和反初始化 ADC 的 GPIO 和 NVIC。