智能wifi小车-ADC电源监控 来源 : 未知     2018-09-21

STM32CubeMX-ADC配置

我们提供了电池电量检测电路，利用一路ADC进行检测电池电量。我们使用的是PC4口，对应的是ADC1的14通道。

进入Configuartion，点击ADC1

进行ADC1配置

使用DMA

开启中断

电压值计算

我们使用的控制器的ADC为12位精度，基准电压为3.3V。根据采集到的值转换为电压值的计算公式如下：

V=Value*3300/212；

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)

{

uint16_t battery = 0;

battery = uhADCxConvertedValue * 3300 / 4095;

OLED_Battery(battery);

}

源码

/* Includes ------------------------------------------------------------------*/

#include "adc.h"

#include "gpio.h"

#include "dma.h"

/* USER CODE BEGIN 0 */

extern __IO uint16_t uhADCxConvertedValue;

/* USER CODE END 0 */

ADC_HandleTypeDef hadc1;

DMA_HandleTypeDef hdma_adc1;

/* ADC1 init function */

void MX_ADC1_Init(void)

{

ADC_ChannelConfTypeDef sConfig;

/**Common config

*/

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;

HAL_ADC_Init(&hadc1);

/**Configure Regular Channel

*/

sConfig.Channel = ADC_CHANNEL_14;

sConfig.Rank = 1;

sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;

HAL_ADC_ConfigChannel(&hadc1, &sConfig);

}

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)

{

GPIO_InitTypeDef GPIO_InitStruct;

if(hadc->Instance==ADC1)

{

/* USER CODE BEGIN ADC1_MspInit 0 */

/* USER CODE END ADC1_MspInit 0 */

/* Peripheral clock enable */

__ADC1_CLK_ENABLE();

/**ADC1 GPIO Configuration

PC4 ------> ADC1_IN14

*/

GPIO_InitStruct.Pin = GPIO_PIN_4;

GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/* Peripheral DMA init*/

hdma_adc1.Instance = DMA1_Channel1;

hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;

hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;

hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;

hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;

hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;

hdma_adc1.Init.Mode = DMA_NORMAL;

hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;

HAL_DMA_Init(&hdma_adc1);

__HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);

/* Peripheral interrupt init*/

HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(ADC1_2_IRQn);

/* USER CODE BEGIN ADC1_MspInit 1 */

/* USER CODE END ADC1_MspInit 1 */

}

}

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)

{

if(hadc->Instance==ADC1)

{

/* USER CODE BEGIN ADC1_MspDeInit 0 */

/* USER CODE END ADC1_MspDeInit 0 */

/* Peripheral clock disable */

__ADC1_CLK_DISABLE();

/**ADC1 GPIO Configuration

PC4 ------> ADC1_IN14

*/

HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4);

/* Peripheral DMA DeInit*/

HAL_DMA_DeInit(hadc->DMA_Handle);

/* Peripheral interrupt Deinit*/

HAL_NVIC_DisableIRQ(ADC1_2_IRQn);

}

/* USER CODE BEGIN ADC1_MspDeInit 1 */

/* USER CODE END ADC1_MspDeInit 1 */

}

/* USER CODE BEGIN 1 */

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)

{

uint16_t battery=0;

battery=uhADCxConvertedValue*3300/4095;

OLED_Battery(battery);

}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/