Add USART2 support and modify system clock configuration

- Implemented USART2 initialization and interrupt handling.
- Added a function to send data to the server via USART2.
- Updated the main application to utilize USART2 for communication.
- Changed system clock configuration to use HSE and PLL for higher frequency.
- Adjusted SPI1 baud rate prescaler for improved performance.
- Enhanced LED control logic based on RFID card detection.
- Updated project configuration to reflect new USART2 settings.

Core/Inc/main.h

@@ -64,6 +64,16 @@ void Error_Handler(void);
 #define PN532_RST_GPIO_Port GPIOB
 #define PN532_REQ_Pin GPIO_PIN_1
 #define PN532_REQ_GPIO_Port GPIOB
+#define RED_LED_Pin GPIO_PIN_12
+#define RED_LED_GPIO_Port GPIOB
+#define ORANGE_LED_Pin GPIO_PIN_13
+#define ORANGE_LED_GPIO_Port GPIOB
+#define GREEN_LED_Pin GPIO_PIN_14
+#define GREEN_LED_GPIO_Port GPIOB
+#define DEBUG_TXD_Pin GPIO_PIN_9
+#define DEBUG_TXD_GPIO_Port GPIOA
+#define DEBUG_RXD_Pin GPIO_PIN_10
+#define DEBUG_RXD_GPIO_Port GPIOA
 
 /* USER CODE BEGIN Private defines */
 

Core/Inc/stm32f1xx_it.h

@@ -57,6 +57,7 @@ void PendSV_Handler(void);
 void SysTick_Handler(void);
 void I2C1_EV_IRQHandler(void);
 void USART1_IRQHandler(void);
+void USART2_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */

Core/Inc/usart.h

@@ -34,11 +34,14 @@ extern "C" {
 
 extern UART_HandleTypeDef huart1;
 
+extern UART_HandleTypeDef huart2;
+
 /* USER CODE BEGIN Private defines */
 
 /* USER CODE END Private defines */
 
 void MX_USART1_UART_Init(void);
+void MX_USART2_UART_Init(void);
 
 /* USER CODE BEGIN Prototypes */