#include <stdio.h>
#include "stm32f10x.h"
#include "SerialPort.h"

#ifdef __GNUC__
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
     set to 'Yes') calls __io_putchar() */
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */

PUTCHAR_PROTOTYPE
{
  USART_SendData(USART1, (uint8_t) ch);

  /* 循环等待直到发送结束*/
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

  return ch;
}

static void NVIC_Configuration(void)
{
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
}

void SerialPortInit(int BaudRate)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);	//使能USART1，GPIOA时钟
	USART_DeInit(USART1);  //复位串口1
	//USART1_TX   PA.9
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
	GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA9

	//USART1_RX	  PA.10
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
	GPIO_Init(GPIOA, &GPIO_InitStructure);  //初始化PA10     
	/* USARTx configured as follow:
		- BaudRate = 9600 baud  波特率
		- Word Length = 8 Bits  数据长度
		- One Stop Bit          停止位
		- No parity             校验方式
		- Hardware flow control disabled (RTS and CTS signals) 硬件控制流
		- Receive and transmit enabled                         使能发送和接收
	*/
	USART_InitStructure.USART_BaudRate = BaudRate;
	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(USART1, &USART_InitStructure);
	
	NVIC_Configuration();
	
	// 打开串口接收中断
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
	
	USART_Cmd(USART1, ENABLE);                    //使能串口 
}