此代码为数字气压传感器CM5534及CM5540的驱动代码。供使用者测试产品性能时参考！-The code for the digital air pressure sensor CM5534 and CM5540 driver code. For users to test product performance information!

cc1101发射程序及相关电路图 已经测试成功并生产产品 请放心下载-the CC1101 launch procedures and related circuit diagram

使用STM32(cortex-M3核)模拟GPS模块（摩托罗拉产品GT-UT ONCORE）与基站设备交换机通过双串口进行AT指令交互完成授时(cpu之systick产生1pps信号)，测试成功。-Use STM32 (cortex-M3 core) simulated GPS module (Motorola products GT-UT ONCORE) and base station equipment switches through dual serial AT commands in