Untitled

#include "main.h"
#include <string.h> // For using strcpy and strlen
 
// UART handle
UART_HandleTypeDef huart2;
 
// Function prototypes
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
 
int main(void) {
    // Initialize HAL library
    HAL_Init();
    SystemClock_Config();
 
    // Initialize GPIOs and UART
    MX_GPIO_Init();
    MX_USART2_UART_Init();
 
    char uart_message[50]; // Buffer for UART messages
 
    // Infinite loop
    while (1) {
        // Check if button is pressed (active-low)
        if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13) == GPIO_PIN_RESET) {
            // Turn on LED
            HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
 
            // Send debugging message over UART
            strcpy(uart_message, "LED ON\r\n");
            HAL_UART_Transmit(&huart2, (uint8_t *)uart_message, strlen(uart_message), HAL_MAX_DELAY);
 
            HAL_Delay(500); // 500 ms delay
 
            // Turn off LED
            HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
 
            // Send debugging message over UART
            strcpy(uart_message, "LED OFF\r\n");
            HAL_UART_Transmit(&huart2, (uint8_t *)uart_message, strlen(uart_message), HAL_MAX_DELAY);
 
            HAL_Delay(500); // 500 ms delay
        }
    }
}
 
/**
 * @brief GPIO Initialization Function
 */
static void MX_GPIO_Init(void) {
    GPIO_InitTypeDef GPIO_InitStruct = {0};
 
    // Enable GPIO Ports Clock
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOC_CLK_ENABLE();
 
    // Configure GPIOA Pin 5 as Output (LED)
    GPIO_InitStruct.Pin = GPIO_PIN_5;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull mode
    GPIO_InitStruct.Pull = GPIO_NOPULL;         // No pull-up or pull-down
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
    // Configure GPIOC Pin 13 as Input (Button)
    GPIO_InitStruct.Pin = GPIO_PIN_13;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_NOPULL;         // No pull-up or pull-down
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
 
/**
 * @brief UART2 Initialization Function
 */
static void MX_USART2_UART_Init(void) {
    huart2.Instance = USART2;
    huart2.Init.BaudRate = 115200;              // Set baud rate
    huart2.Init.WordLength = UART_WORDLENGTH_8B; // 8-bit word length
    huart2.Init.StopBits = UART_STOPBITS_1;      // 1 stop bit
    huart2.Init.Parity = UART_PARITY_NONE;       // No parity
    huart2.Init.Mode = UART_MODE_TX_RX;          // Enable TX and RX
    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE; // No hardware flow control
    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart2) != HAL_OK) {
        Error_Handler();
    }
}
 
/**
 * @brief System Clock Configuration
 */
void SystemClock_Config(void) {
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
    /** Configure the main internal regulator output voltage */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
 
    /** Initializes the RCC Oscillators */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLM = 16;
    RCC_OscInitStruct.PLL.PLLN = 336;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
    RCC_OscInitStruct.PLL.PLLQ = 7;
    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();
    }
}
 
/**
 * @brief Error Handler Function
 */
void Error_Handler(void) {
    while (1) {
        // Stay here for debugging
    }
}