USART初始化:
#include "stm32f10x.h"
//初始化IO 串口1
//bound:波特率
void usart1_ini(u32 bound)
{
//各结构体定义
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//使能USART1,GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);
//复位串口1
USART_DeInit(USART1);
//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  

A.10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //输入上拉 //浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA10
//USART 初始化设置
USART_InitStructure.USART_BaudRate = bound; //一般设置为9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART1, &USART_InitStructure); //初始化串口
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //开启接收中断
USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE); //????1?DMA??
USART_Cmd(USART1, ENABLE); //使能串口
}
LED工作指示灯初始化:
#include "stm32f10x.h"
//LED IO初始化
void LED_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //定义一个结构体变量
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOD, ENABLE); //使能PA,PD端口时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //LED0-->

A.8 端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure); //根据设定参数初始化GPIOA.8
GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.8 输出高
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //LED1-->

D.2 端口配置, 推挽输出
GPIO_Init(GPIOD, &GPIO_InitStructure); //推挽输出 ,IO口速度为50MHz
GPIO_SetBits(GPIOD,GPIO_Pin_2); //PD.2 输出高
}
//INPUT初始化
void INPUT_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC,ENABLE); //使能PORTA,PORTC时钟
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); //关闭jtag,使能SWD,可以用SWD模式调试 为了PA15能做普通IO口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; //PA15
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置成上拉输入
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIOA15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //PC5
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置成上拉输入
GPIO_Init(GPIOC, &GPIO_InitStructure); //初始化GPIOC5
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PA0
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0设置成输入,默认下拉
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIOA.0
}
发送数据:F1 05 A1 66 FD F4 接收到的数据:F1 41 33 F5 F4