第九届蓝桥杯嵌入式国赛（STM32G4与HAL库实现）
前言
本程序基于STM32G431RB开发，使用工具为STM32CubeMX + Keil MDK 5 + HAL库。
题目要求
基本要求
完成“电子秤”功能。
硬件框图
功能描述
基本功能
- 通过资源扩展板电位器RP5模拟称重传感器输出信号，STM32采集此电压信号，并计算货物重量。电子秤称重范围0-10kg。
- 通过按键选择不同货物、计费及货物单价参数设置等功能。
- 通过LCD显示所称货物重量和货物价格等信息。
- 设备基本工作流程：选择货物（按键操作）——称重——计费（按键操作）——更新显示及串口输出。
按键功能
显示功能
存储功能
称重功能
LED指示灯功能
- 称重计费状态下，LD1以0.8秒为间隔亮灭
- 单价设置状态下，LD1以0.4秒为间隔亮灭
串口功能
- 使用竞赛板上的USART2（USB转串口）完成串口输出功能。
- 串口通讯波特率：9600bps
资源扩展板跳线配置参考
代码实现
为了方便提交，或者说不容易遗漏，本工程将绝大部分实现代码写在main.c文件中.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention : 此为第九届蓝桥杯嵌入式设计大赛程序设计题
*
* © Copyright (c) 2021 STMicroelectronics.
* All rights reserved.
*
* 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"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "string.h"
#include "i2c - hal.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define BTN_BUFF_LEN 20
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc2;
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
char TextBuff[30];
uint32_t adc_value = 0;
uint32_t key_value = 0;
u16 btn_buff[BTN_BUFF_LEN];
double Weight_Value = 0;
double Goodsprice1 = 0;
double Goodsprice2 = 0;
double Goodsprice3 = 0;
uint8_t SettingTimes = 0;
uint8_t Key_1_Flag = 0;
uint8_t Key_4_Flag = 0;
uint8_t Key_567_Flag = 1;
uint8_t Key_8_Flag = 0;
uint8_t Set_Flag = 0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC2_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
void LCD_cls(void);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/******************获取ADC值**********************/
uint16_t Get_ADC(uint32_t ch)
{
ADC_ChannelConfTypeDef sConfig = {
0};
sConfig.Channel = ch;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_247CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
HAL_ADC_Start(&hadc2);
HAL_ADC_PollForConversion(&hadc2,10);
return (uint16_t)HAL_ADC_GetValue(&hadc2);
}
/*************************************************/
/****************均值滤波**************************/
u16 Get_Adc_Average(u32 ch,u8 times)
{
u32 temp_val=0;
u8 t;
for(t=0;t<times;t++)
{
temp_val+=Get_ADC(ch);
HAL_Delay(5);
}
return temp_val/times;
}
/***************************************************/
/*********************ADC按键***********************/
u8 key_read()
{
u16 ADC_temp = 4500;
ADC_temp = Get_Adc_Average(ADC_CHANNEL_13,1);
if(ADC_temp<100)
{
return 1;
}
else if(ADC_temp<400)
{
return 2;
}
else if(ADC_temp<700)
{
return 3;
}
else if(ADC_temp<1100)
{
return 4;
}
else if(ADC_temp<1500)
{
return 5;
}
else if(ADC_temp<2000)
{
return 6;
}
else if(ADC_temp<2500)
{
return 7;
}
else if(ADC_temp<3500)
{
return 8;
}
else
return 0;
}
/***************************************************/
/*******************按键扫描************************/
void Key_Scan()
{
static u8 key_up=1; //按键松开标志
if(key_up && key_value != 0){
key_up = 0;
if(key_value == 1){
Key_1_Flag++;
if(Key_1_Flag > 2) Key_1_Flag = 0;
}
if(key_value == 2){
if(Key_4_Flag == 1){
Goodsprice1 += 0.01;
}
if(Key_4_Flag == 2){
Goodsprice2 += 0.01;
}
if(Key_4_Flag == 3){
Goodsprice3 += 0.01;
}
if(Goodsprice1 > 10) Goodsprice1 = 10;
if(Goodsprice2 > 10) Goodsprice2 = 10;
if(Goodsprice3 > 10) Goodsprice3 = 10;
Set_Flag = 1;
}
if(key_value == 3){
if(Key_4_Flag == 1){
Goodsprice1 -= 0.01;
}
if(Key_4_Flag == 2){
Goodsprice2 -= 0.01;
}
if(Key_4_Flag == 3){
Goodsprice3 -= 0.01;
}
if(Goodsprice1 < 0) Goodsprice1 = 0;
if(Goodsprice2 < 0) Goodsprice2 = 0;
if(Goodsprice3 < 0) Goodsprice3 = 0;
Set_Flag = 1;
}
if(key_value == 4){
Key_4_Flag++;
if(Key_4_Flag > 3){
Key_4_Flag = 0;
}
}
if(key_value == 5){
Key_567_Flag = 1;
}
if(key_value == 6){
Key_567_Flag = 2;
}
if(key_value == 7){
Key_567_Flag = 3;
}
if(key_value == 8){
Key_8_Flag = 1;
}
}
else if(key_value == 0){
key_up = 1;
Key_8_Flag = 0;
}
}
/*******************************************************/
/************************设置界面************************/
void SettingDisplay()
{
LCD_SetBackColor(Blue);
LCD_DisplayStringLine(Line0,(uint8_t *)" parameter settings ");
LCD_DisplayStringLine(Line1,(uint8_t *)" ");
LCD_DisplayStringLine(Line5,(uint8_t *)" ");
LCD_DisplayStringLine(Line6,(uint8_t *)" ");
LCD_DisplayStringLine(Line7,(uint8_t *)" ");
LCD_DisplayStringLine(Line8,(uint8_t *)" ");
sprintf(TextBuff,"PriceGoods1:%.2fY/kg", Goodsprice1);
if(Key_4_Flag == 1){
LCD_SetBackColor(Green);
LCD_DisplayStringLine(Line2,(uint8_t *)TextBuff);
LCD_SetBackColor(Blue);
}
else{
LCD_DisplayStringLine(Line2,(uint8_t *)TextBuff);
}
sprintf(TextBuff,"PriceGoods2:%.2fY/kg", Goodsprice2);
if(Key_4_Flag == 2){
LCD_SetBackColor(Green);
LCD_DisplayStringLine(Line3,(uint8_t *)TextBuff);
LCD_SetBackColor(Blue);
}
else{
LCD_DisplayStringLine(Line3,(uint8_t *)TextBuff);
}
sprintf(TextBuff,"PriceGoods3:%.2fY/kg", Goodsprice3);
if(Key_4_Flag == 3){
LCD_SetBackColor(Green);
LCD_DisplayStringLine(Line4,(uint8_t *)TextBuff);
LCD_SetBackColor(Blue);
}
else{
LCD_DisplayStringLine(Line4,(uint8_t *)TextBuff);
}
sprintf(TextBuff," Setting times:%d", SettingTimes);
LCD_DisplayStringLine(Line9,(uint8_t *)TextBuff);
}
/***************************************************************/
/****************************称重界面***************************/
void GoodsDisplay(uint8_t id, double Goodsprice)
{
Weight_Value =Get_Adc_Average(ADC_CHANNEL_17,20) * 10.0 / 4096;
LCD_DisplayStringLine(Line0,(uint8_t *)" Weighing charges ");
sprintf(TextBuff," Goods ID:%d ", id);
LCD_DisplayStringLine(Line2,(uint8_t *)TextBuff);
sprintf(TextBuff," Goods Price:%.2fY/Kg", Goodsprice);
LCD_DisplayStringLine(Line3,(uint8_t *)TextBuff);
sprintf(TextBuff," Goods Weight:%.2fKg", Weight_Value);
LCD_DisplayStringLine(Line4,(uint8_t *)TextBuff);
double Sum_Price = Goodsprice * Weight_Value;
sprintf(TextBuff," Sum Price:%.2f Y", Sum_Price);
LCD_DisplayStringLine(Line5,(uint8_t *)TextBuff);
LCD_DisplayStringLine(Line1,(uint8_t *)" ");
LCD_DisplayStringLine(Line9,(uint8_t *)" ");
LCD_DisplayStringLine(Line6,(uint8_t *)" ");
LCD_DisplayStringLine(Line7,(uint8_t *)" ");
LCD_DisplayStringLine(Line8,(uint8_t *)" ");
if(Key_8_Flag == 1){
printf("U.W.%d:%.2f\n",id,Goodsprice);
printf("G.W:%.2f\n", Weight_Value);
printf("Total:%.2f\n",Sum_Price);
printf("\n");
}
}
/****************************************************************/
//IIC读函数
uint8_t M24C02_Read(unsigned char address)
{
unsigned char val;
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(address);
I2CWaitAck();
I2CStart();
I2CSendByte(0xa1);
I2CWaitAck();
val = I2CReceiveByte();
I2CWaitAck();
I2CStop();
return val;
}
//IIC写函数
void M2402_write(unsigned char address, uint16_t info)
{
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(address);
I2CWaitAck();
I2CSendByte(info);
I2CWaitAck();
I2CStop();
}
void Seting_Save()
{
if(Set_Flag == 1){
SettingTimes++;
Set_Flag = 0;
}
sprintf(TextBuff," Setting times:%d", SettingTimes);
LCD_DisplayStringLine(Line9,(uint8_t *)TextBuff);
uint16_t temp_z = Goodsprice1;
uint16_t temp_x = (Goodsprice1-temp_z)*100;
M2402_write(0x00,temp_z);
HAL_Delay(5);
M2402_write(0x01,temp_x);
HAL_Delay(5);
temp_z = Goodsprice2;
temp_x = (Goodsprice2-temp_z)*100;
M2402_write(0x02,temp_z);
HAL_Delay(5);
M2402_write(0x03,temp_x);
HAL_Delay(5);
temp_z = Goodsprice3;
temp_x = (Goodsprice3-temp_z)*100;
M2402_write(0x04,temp_z);
HAL_Delay(5);
M2402_write(0x05,temp_x);
HAL_Delay(5);
M2402_write(0x06,SettingTimes);
HAL_Delay(5);
}
void Printf_Save()
{
static u8 Printf_Flag=1; //按键松开标志
if(Printf_Flag && Key_1_Flag == 2)
{
Printf_Flag=0;
if(Key_1_Flag == 2){
printf("U.W.1:%.2f\n",Goodsprice1);
printf("U.W.2:%.2f\n",Goodsprice2);
printf("U.W.3:%.2f\n",Goodsprice3);
}
}else if(Key_1_Flag != 2)Printf_Flag = 1;
}
/* 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_ADC2_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
LCD_Init();
LCD_Clear(Blue);
LCD_SetBackColor(Blue);
LCD_SetTextColor(White);
LCD_DisplayStringLine(Line0,(uint8_t *)" ");
LCD_DisplayStringLine(Line1,(uint8_t *)" ");
LCD_DisplayStringLine(Line2,(uint8_t *)" ");
LCD_DisplayStringLine(Line3,(uint8_t *)" ");
LCD_DisplayStringLine(Line4,(uint8_t *)" ");
LCD_DisplayStringLine(Line5,(uint8_t *)" ");
LCD_DisplayStringLine(Line6,(uint8_t *)" ");
LCD_DisplayStringLine(Line7,(uint8_t *)" ");
LCD_DisplayStringLine(Line8,(uint8_t *)" ");
LCD_DisplayStringLine(Line9,(uint8_t *)" ");
LCD_cls();
uint16_t temp_val_z = M24C02_Read(0x00);
uint16_t temp_val_x = M24C02_Read(0x01);
Goodsprice1 = temp_val_z + temp_val_x/100.;
temp_val_z = M24C02_Read(0x02);
temp_val_x = M24C02_Read(0x03);
Goodsprice2 = temp_val_z + temp_val_x/100.;
temp_val_z = M24C02_Read(0x04);
temp_val_x = M24C02_Read(0x05);
Goodsprice3 = temp_val_z + temp_val_x/100.;
SettingTimes = M24C02_Read(0x06);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/************************按键部分******************************/
key_value=key_read();
Key_Scan();
/**************************************************************/
/************************设置界面*******************************/
if(Key_1_Flag == 1){
SettingDisplay();
}
if(Key_1_Flag == 2){
Seting_Save();
}
Printf_Save();
/**************************************************************/
/*************************计费界面********************************/
if(Key_1_Flag == 0){
if(Key_567_Flag == 1){
GoodsDisplay(1,Goodsprice1);
}
if(Key_567_Flag == 2){
GoodsDisplay(2,Goodsprice2);
}
if(Key_567_Flag == 3){
GoodsDisplay(3,Goodsprice3);
}
}
/*************************************************************/
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* 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_USART1|RCC_PERIPHCLK_ADC12;
PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief ADC2 Initialization Function
* @param None
* @retval None
*/
static void MX_ADC2_Init(void)
{
/* USER CODE BEGIN ADC2_Init 0 */
/* USER CODE END ADC2_Init 0 */
/* USER CODE BEGIN ADC2_Init 1 */
/* USER CODE END ADC2_Init 1 */
/** Common config
*/
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc2.Init.Resolution = ADC_RESOLUTION_12B;
hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc2.Init.GainCompensation = 0;
hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.NbrOfConversion = 1;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc2.Init.DMAContinuousRequests = DISABLE;
hadc2.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc2.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
/* USER CODE BEGIN ADC2_Init 2 */
/* USER CODE END ADC2_Init 2 */
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {
0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_8
|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_RESET);
/*Configure GPIO pins : PC13 PC14 PC15 PC8
PC9 PC10 PC11 PC12 */
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_8
|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pin : PD2 */
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/*Configure GPIO pins : PB6 PB7 */
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
//清除LCD
void LCD_cls(void)
{
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_8
| GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET);
}
int fputc(int ch, FILE *f)
{
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 1000);
return(ch);
}
/* 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****/
现象
最后
按键长按短按没有显示，led也没做，主要是因为做到一半才看见需要用到定时器，但刚开始有没有去配置，所以就懒得再去整了。大家可以试着去添加上去。
笔者能力有限，现时间紧迫，文中尚有不足还请多多指点。