帮我设计一个用于STM32F104C8T6的串口通信的驱动程序

设计一个针对STM32F104C8T6的串口通信驱动程序需要遵循以下几个步骤：

1. **头文件包含**：

   #include "stm32f10x.h" // 包含STM32标准库头文件
   #include <stdio.h>

2. **初始化USART**：

   void USART_Init(void) {
       GPIO_InitTypeDef GPIO_InitStructure;
       USART_InitTypeDef USART_InitStructure;

       RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB1Periph_USART2, ENABLE); // 启动GPIOA和USART2时钟

       GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; // RX pin
       GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
       GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
       GPIO_Init(GPIOA, &GPIO_InitStructure);
       GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART2);

       GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; // TX pin
       GPIO_Init(GPIOA, &GPIO_InitStructure);
       GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART2);

       USART_InitStructure.USART_BaudRate = YOUR_BAUD_RATE; // 设置波特率
       USART_InitStructure.USART_WordLength = USART_WordLength_8b;
       USART_InitStructure.USART_StopBits = USART_StopBits_1;
       USART_InitStructure.USART_Parity = USART_Parity_No;
       USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
       USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
       USART_Init(USART2, &USART_InitStructure);
   }

3. **配置中断**：

   void USART_IT_Config(void) {
       NVIC_InitTypeDef NVIC_InitStructure;

       USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); // 开启RXNE中断
       NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
       NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
       NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
       NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
       NVIC_Init(&NVIC_InitStructure);
   }

   void USART2_IRQHandler(void) {
       if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) {
           uint8_t data = USART_ReceiveData(USART2); // 接收数据
           handle_received_data(data);
       }
   }

4. **数据发送与接收函数**：

   void sendData(uint8_t data) {
       USART_SendData(USART2, data); // 发送数据
   }

   uint8_t receiveData(void) {
       return USART_ReceiveData(USART2); // 接收数据，返回接收到的字节
   }

5. **主函数中调用**：

   int main(void) {
       USART_Init();
       USART_IT_Config();

       while (1) {
           // 主循环，例如从用户输入获取字符并发送到串口
           char input_char = getchar();
           sendData(input_char);
       }

       return 0;
   }