STM32G431RBTx 基本模块 ADC

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STMCU小助手发布时间：2023-3-1 22:33

文章
文章封面:
文章简介:	STM32G431RBTx】备战蓝桥杯嵌入式→基本模块→ADC

前言
G4板载了四个电位器，其中左边两个是电压采集用的，本篇文章将讲述如何单片机的adc功能采集左边两个滑变的电压值。

ADC
1.原理图以及配置元素

分析:由图知，PB15作为左边第一个旋钮的采集引脚，PB12作为左边第二个旋钮的采集引脚。

2.CubeMx的配置步骤

将PB12设置为ADC1的通道11，PB15设置为ADC2的通道15。进入Analog中的ADC1和ADC2。

只需激活ADC1通道11的Single-ended采集功能，不需要其他配置。

只需激活ADC2通道15的Single-ended采集功能，不需要其他配置。

3.生成工程

点击完生成代码之后进入工程文件夹中的bsp文件夹

在bsp文件中新建badc.c和badc.h文件(不用adc.c和adc.h命名是为了防止与CubeMx生成的文件起冲突)
打开工程将两个文件添加到工程中去

至此工程就建立完毕了

4.测试代码
badc.h:

#ifndef __BADC_H__
#define __BADC_H__
#include "main.h"
double getADC(ADC_HandleTypeDef *hadc);
#endif

复制代码

badc.c:

#include "badc.h"
double getADC(ADC_HandleTypeDef *hadc)
{
unsigned int adc;
HAL_ADC_Start(hadc);
adc = HAL_ADC_GetValue(hadc);
return adc * 3.3 / 4096;
}

复制代码

main.c:

/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "tim.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"
#include "badc.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
extern struct keys key[];
unsigned char pa6_duty = 10; //设置PA6初始PWM波占空比为10%
unsigned char pa7_duty = 10; //设置PA7初始PWM波占空比为10%
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void Dispose_Key(void);
void LCD_Display(void);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM3_Init();
MX_TIM16_Init();
MX_TIM17_Init();
MX_ADC1_Init();
MX_ADC2_Init();
/* USER CODE BEGIN 2 */
LCD_Init();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
LCD_Clear(Black); //清屏并将背景设为黑色
LCD_SetBackColor(Black); //设置字体背景颜色为黑色
LCD_SetTextColor(White); //设置字体文本颜色为白色
HAL_TIM_Base_Start_IT(&htim3);
HAL_TIM_PWM_Start(&htim16, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim17, TIM_CHANNEL_1);
LED_Disp(0x00);
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
Dispose_Key();
LCD_Display();
char text[30];
sprintf(text, " V1:%.2f", getADC(&hadc1));
LCD_DisplayStringLine(Line6, (unsigned char *)text);
sprintf(text, " V2:%.2f", getADC(&hadc2));
LCD_DisplayStringLine(Line7, (unsigned char *)text);
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
/** Configure the main internal regulator output voltage
*/
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV3;
RCC_OscInitStruct.PLL.PLLN = 20;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
/** Initializes the peripherals clocks
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
void Dispose_Key(void)
{
if(key[1].single_flag == 1)
{
pa6_duty += 10; //每次B2按键按下PA6占空比加10%
if(pa6_duty > 90) //加到90%重新返回10%
pa6_duty = 10;
__HAL_TIM_SetCompare(&htim16, TIM_CHANNEL_1, pa6_duty);//将pa6_duty的值设置到比较寄存器中
key[1].single_flag = 0;
}
if(key[2].single_flag == 1)
{
pa7_duty += 10; //每次B2按键按下PA6占空比加10%
if(pa7_duty > 90) //加到90%重新返回10%
pa7_duty = 10;
__HAL_TIM_SetCompare(&htim17, TIM_CHANNEL_1, pa7_duty);//将pa6_duty的值设置到比较寄存器中
key[2].single_flag = 0;
}
}
void LCD_Display(void)
{
char text[30];
sprintf(text, " Para");
LCD_DisplayStringLine(Line0, (unsigned char *)text);
sprintf(text, " PA6:%d%%", pa6_duty);
LCD_DisplayStringLine(Line2, (unsigned char *)text);
sprintf(text, " PA7:%d%%", pa7_duty);
LCD_DisplayStringLine(Line4, (unsigned char *)text);
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/