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说明:1、本博客中使用的开发软件为MDK5(KEIL5)；
2、单片机为stm32f103zet6
3、该博客适用于有一定C和单片机基础的初学者
一、下载安装MDK5
笔者之前学51的时候用的Keil4， 但是在添加芯片的时候出现困难。于是下载安装了MDK5，这个网上搜一下有
很多资源的。
二、建立一个工程
参考博客：STM32F1固件库文件讲解与基于固件库新建MDK工程模板
三、第一个例程
目的：使连接在PB5和PE5口的LED灯一闪一灭
int main(void)
{
//GPIO，General Purpose Input Output ,通用输入输出
GPIO_InitTypeDef GPIO_InitStructure;//定义一个结构体
//结构体中有三个参数，GPIO_Pin，GPIO_Speed和GPIO_Mode
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|
RCC_APB2Periph_GPIOE, ENABLE); //开启时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; // 5号脚定义为输入输出引脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //定义为推挽输出模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //输入输出速度为50MHz
GPIO_Init(GPIOB, &GPIO_InitStructure); //用设置好的参数初始化PB.5
GPIO_SetBits(GPIOB,GPIO_Pin_5); //对PB5引脚施加高电平，GPIO_ResetBits（）为施加低电平
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //
GPIO_Init(GPIOE, &GPIO_InitStructure); //初始化PE5
GPIO_SetBits(GPIOE,GPIO_Pin_5); //PE.5设置为高电平
while(1)
{
GPIO_ResetBits(GPIOB,GPIO_Pin_5);
GPIO_SetBits(GPIOE,GPIO_Pin_5);//同时，PB5亮，PE5灭
Delay(3000000);
GPIO_SetBits(GPIOB,GPIO_Pin_5);
GPIO_ResetBits(GPIOE,GPIO_Pin_5);//
Delay(3000000);
}
}
未完待续
