电脑需先安装Keil MDK5。此固件库为Keil官方提供，直接双击安装即可，安装成功后在MDK5工程的Device中验证,或者在PACK安装页面选择File->Import 官网下载比较慢,为方便大家提供分享

ARM.CMSIS.5.0.0.pack，ARM.CMSIS.5.1.0.pack，ARM.CMSIS.5.2.0.pack，ARM.CMSIS.5.3.0.pack，ARM.CMSIS.5.4.0.pack，ARM.CMSIS.5.5.0.pack，ARM.CMSIS.5.6.0.pack，ARM.CMSIS.5.7.0.pack

ARM.CMSIS.5.7.0.zip