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//#include "stm32f10x_lib.h"

void Delay(unsigned int x);

void UART_Init(void);

int main(void)

{

while (1)

{

Delay(300000);

UART_Init(); //初始化串口

USART_SendData(USART1,0x1A); //从串口发送数据到计算机

while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);//RESET是0，等待发送完毕

// if(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET)

GPIO_SetBits(GPIOC, GPIO_Pin_6 ); //发送完毕则点亮D1二极管

}

}

void UART_Init(void)

{

SystemInit();//配置系统时钟

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_USART1,ENABLE);//IO口使能设置

GPIO_InitTypeDef GPIO_InitStructure; //定义I/O口结构体

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;

GPIO_Init(GPIOC, &GPIO_InitStructure);

USART_InitTypeDef USART_InitStructure;//定义串口结构体

//RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1，ENABLE);//使能串口1

USART_InitStructure.USART_BaudRate=38400;

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);

USART_Cmd(USART1,ENABLE);

}

void Delay(unsigned int x)

{

unsigned int t;

t=x;

while(t--);

}