STM32CubeMX + ADC data acquisition

Design of the battery voltage detecting application

STM32 understand: https://blog.csdn.net/u010893262/article/details/68942710

A, ADC (Analog-to-Digital Converter) analog to digital converter

Analog -----> Digital Signal

                               

 

Second, the operating parameters of the ADC peripheral configuration

 

Second, the operating parameters of the ADC peripheral configuration

 

Third, the configuration of the operating parameters USART peripherals

 

 

 Fourth, generate code

Set the required variable in the main.c file

/ * The USER CODE the BEGIN the PV * / 
// the ADC converted value is stored 
uint16_t = adc_value 0 ;    
 // voltage value of 
a float Voltage = 0.0 ;
 // voltage results show 
char voltString [ 50 ] = { 0 };
 / * the USER CODE the END the PV * /

In the while loop

while (1)
  {
        // 启动ADC转换
        HAL_ADC_Start(&hadc1);
        // 等待转换完成，第二个参数表示超时时间，单位ms
        HAL_ADC_PollForConversion(&hadc1, 100);
        // 为换取ADC状态
        adc_value = HAL_ADC_GetValue(&hadc1);
        // 采取的右对齐除以2的12次方，参考电压为3.3V
        voltage = (float)adc_value / 4096 * 3.3;
        sprintf(voltString, "²É¼¯µ½µÄµçѹֵΪ: %.2f V", voltage);
        printf("%s\r\n", voltString);
        HAL_Delay(1000);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }

 在USART.c添加

#include "usart.h"

int fputc(int ch, FILE *f)
{
    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);
    return ch;
} 

 在USART.h添加

#include "main.h"
#include <stdio.h>