建立一个STM32工程
前期准备： 版本说明：MDK5.15，如果有更高的版本可使用高版本。 版本号可从 MDK软件的“Help–>About uVision”选项中查询到。 串口助手，下载助手 固件库
- 新建本地工程文件夹
为了工程目录更加清晰，我们在本地电脑上新建 1 个文件夹用于存放整个工程，如命名为“工程模板”，然后在该目录下需要包含 六个文件夹。
为了让大家更直观，下面给出工程文件夹的详解图
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工程模板
Doc
Libraries
Listing
Output
Project
User
以下是每个文件夹的作用
名称作用Doc用来存放程序说明的文件，由写程序的人添加Libraries存放的是库文件Listing存放编译器编译时候产生的 C/汇编/链接的列表清单Output存放编译产生的调试信息、hex 文件、预览信息、封装库等Project用来存放工程User用户编写的驱动文件- 在KEIL5里建工程 打开 KEIL5，新建一个工程，工程名根据喜好命名，保存在 Project\文件夹下。
- 选择 CPU型号 这个根据你开发板使用的CPU具体的型号来选择，如果这里没有出现你想要的 CPU型号，或者一个型号都没有，那么肯定是你的KEIL5没有添加 device 库，KEIL5 不像 KEIL4 那样自带了很多 MCU 的型号，KEIL5 需要自己添加。
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在线添加库文件 等下我们手动添加库文件，这里我们点击关掉.
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添加组文件夹 在新建的工程中添加 5 个组文件夹，用来存放各种不同的文件，文件从本地建好的工程文件夹下获取，双击组文件夹就会出现添加文件的路径，然后选择文件即可。
工程组文件夹详解
- 配置魔术棒选项卡
这一步的配置工作很重要，很多人串口用不了printf函数，编译有问题，下载有问题，都是这个步骤的配置出了错。 (1) Target 中选中微库“ Use MicroLib”，为的是在日后编写串口驱动的时候可以使用printf 函数。
(2) 在 Output 选项卡中把输出文件夹定位到我们工程目录下的“output”文件夹，如果想在编译的过程中生成 hex文件，那么那 Create HEX File 选项勾上。 (3) 在 Listing 选项卡中把输出文件夹定位到我们工程目录下的“Listing”文件夹。 (4) 在 C/C++选项卡中添加处理宏及编译器编译的时候查找的头文件路径。如果头文件路径添加有误，则编译的时候会报错找不到头文件。 
在这个选项中添加宏，就相当于我们在文件中使用“#define”语句定义宏一样。在编译器中添加宏的好处就是，只要用了这个模版，就不用源文件中修改代码。 STM32F10X_HD宏：为了告诉 STM32标准库，我们使用的芯片类型是 STM32型号是大容量的，使 STM32标准库根据我们选定的芯片型号来配置。 USE_STDPERIPH_DRIVER 宏：为了让 stm32f10x.h 包含 stm32f10x_conf.h 这个头文件. “Include Paths ”这里添加的是头文件的路径，如果编译的时候提示说找不到头文件，一般就是这里配置出了问题。你把头文件放到了哪个文件夹，就把该文件夹添加到这里即可。(请使用图中的方法用文件浏览器去添加路径，不要直接手打路径，容易出错)
- 仿真器配置
8. 选择 CPU型号
这一步的配置也不是配置一次之后完事，常常会因为各种原因需要重新选择，当你下载的时候，提示说找不到 Device 的时候，请确保该配置是否正确。有时候下载程序之后，不会自动运行，要手动复位的时候，也回来看看这里的“Reset and Run”配置是否失效。这里用的 STM32 的 FLASH 大小是 1M，所以这里选择 1M 的容量，如果使用的是其 他型号的，要根据实际情况选择。 
工程已经成功的建立，后面会陆续更新STM32工程。欢迎关注。
