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八个按键一一对应八个输出

news 2025/8/29 17:26:26

八个按键一一对应八个输出

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** Copyright (c) 2025 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/*** @brief  重定向c库函数printf到USARTx* @param  None* @retval None*/
int __io_putchar(int ch)
{HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, HAL_MAX_DELAY);// HAL_UART_Transmit(&huart3, (uint8_t *)&ch, 1, HAL_MAX_DELAY);return ch;
}/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
static uint8_t  out_state   = 0;     // PC0-PC7 当前状态
static uint8_t  last_keys   = 0xFF;  // 上一次按键状态
static uint32_t last_tick   = 0;     // 消抖计时
static uint32_t led_on_tick = 0;     // PA15 亮灯计时
const uint32_t  DEBOUNCE_MS = 50;    // 消抖延时
const uint32_t  LED_ON_MS   = 1000;  // PA15 亮灯时长static uint8_t Read_Keys(void)
{uint8_t value = 0;if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_8) == GPIO_PIN_RESET){value |= (1U << 0);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_9) == GPIO_PIN_RESET){value |= (1U << 1);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_10) == GPIO_PIN_RESET){value |= (1U << 2);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_11) == GPIO_PIN_RESET){value |= (1U << 3);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_12) == GPIO_PIN_RESET){value |= (1U << 4);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_13) == GPIO_PIN_RESET){value |= (1U << 5);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET){value |= (1U << 6);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_15) == GPIO_PIN_RESET){value |= (1U << 7);}return value;
}static void Write_All(uint8_t val)
{for(int i = 0; i < 8; ++i){uint16_t      pin_mask = (GPIO_PIN_0 << i);GPIO_PinState state    = (((val >> i) & 1U) != 0U) ? GPIO_PIN_SET : GPIO_PIN_RESET;HAL_GPIO_WritePin(GPIOC, pin_mask, state);}
}/* 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_USART2_UART_Init();/* USER CODE BEGIN 2 */printf("\r\n[BOOT] System started. HCLK=%lu ms tick ready.\r\n", (unsigned long)HAL_GetTick());out_state = 0;last_keys = Read_Keys();last_tick = HAL_GetTick();Write_All(out_state);printf("[INIT] OUT state=0x%02X, keys=0x%02X\r\n", out_state, last_keys);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while(1){uint8_t  keys = Read_Keys();uint32_t now  = HAL_GetTick();/* 消抖检测下降沿：按键按下为 1，松开为 0（上拉输入，低有效）本实现：检测从未按下(0)到按下(1)的边沿，逐位翻转对应 PCx */uint8_t edge = (~last_keys) & keys;  // 新增为 1 的位if(edge && (now - last_tick >= DEBOUNCE_MS)){last_keys = keys;last_tick = now;/* 仅翻转触发的位，PC0-PC7 与 PB8-PB15 一一对应 */out_state ^= edge;Write_All(out_state);printf("[KEY] edge=0x%02X, keys=0x%02X -> OUT=0x%02X\r\n", edge, keys, out_state);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_SET);  // 指示灯亮led_on_tick = now;} else if(!edge){last_keys = keys;  // 无抖动更新}/* 1 秒后自动熄灭 PA15 */if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15) == GPIO_PIN_SET && (now - led_on_tick >= LED_ON_MS)){HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_RESET);printf("[LED] OFF after %lu ms\r\n", (unsigned long)(now - led_on_tick));}HAL_Delay(10);/* 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};/** 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.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;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_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* 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 */

任何一个控制八个输出

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** Copyright (c) 2025 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/*** @brief  重定向c库函数printf到USARTx* @param  None* @retval None*/
int __io_putchar(int ch)
{HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, HAL_MAX_DELAY);// HAL_UART_Transmit(&huart3, (uint8_t *)&ch, 1, HAL_MAX_DELAY);return ch;
}/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
static uint8_t  out_state   = 0;     // PC0-PC7 当前状态
static uint8_t  last_keys   = 0xFF;  // 上一次按键状态
static uint32_t last_tick   = 0;     // 消抖计时
static uint32_t led_on_tick = 0;     // PA15 亮灯计时
const uint32_t  DEBOUNCE_MS = 50;    // 消抖延时
const uint32_t  LED_ON_MS   = 1000;  // PA15 亮灯时长static uint8_t Read_Keys(void)
{uint8_t value = 0;if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_8) == GPIO_PIN_RESET){value |= (1U << 0);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_9) == GPIO_PIN_RESET){value |= (1U << 1);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_10) == GPIO_PIN_RESET){value |= (1U << 2);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_11) == GPIO_PIN_RESET){value |= (1U << 3);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_12) == GPIO_PIN_RESET){value |= (1U << 4);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_13) == GPIO_PIN_RESET){value |= (1U << 5);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET){value |= (1U << 6);}if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_15) == GPIO_PIN_RESET){value |= (1U << 7);}return value;
}static void Write_All(uint8_t val)
{for(int i = 0; i < 8; ++i){uint16_t      pin_mask = (GPIO_PIN_0 << i);GPIO_PinState state    = (((val >> i) & 1U) != 0U) ? GPIO_PIN_SET : GPIO_PIN_RESET;HAL_GPIO_WritePin(GPIOC, pin_mask, state);}
}/* 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_USART2_UART_Init();/* USER CODE BEGIN 2 */printf("\r\n[BOOT] System started. HCLK=%lu ms tick ready.\r\n", (unsigned long)HAL_GetTick());out_state = 0;last_keys = Read_Keys();last_tick = HAL_GetTick();Write_All(out_state);printf("[INIT] OUT state=0x%02X, keys=0x%02X\r\n", out_state, last_keys);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while(1){uint8_t  keys = Read_Keys();uint32_t now  = HAL_GetTick();/* 消抖检测下降沿：按键按下为 1，松开为 0（上拉输入，低有效）本实现：检测从未按下(0)到按下(1)的边沿，逐位翻转对应 PCx */uint8_t edge = (~last_keys) & keys;  // 新增为 1 的位if(edge && (now - last_tick >= DEBOUNCE_MS)){last_keys = keys;last_tick = now;/* 任意按键按下：翻转所有 8 路输出 */out_state ^= 0xFF;Write_All(out_state);printf("[KEY] edge=0x%02X, keys=0x%02X -> OUT=0x%02X\r\n", edge, keys, out_state);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_SET);  // 指示灯亮led_on_tick = now;} else if(!edge){last_keys = keys;  // 无抖动更新}/* 1 秒后自动熄灭 PA15 */if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15) == GPIO_PIN_SET && (now - led_on_tick >= LED_ON_MS)){HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_RESET);printf("[LED] OFF after %lu ms\r\n", (unsigned long)(now - led_on_tick));}HAL_Delay(10);/* 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};/** 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.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;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_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* 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 */
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