该代码是西门子公司sle4442的固件代码，mcu使用的是c8052f340，代码结构清晰，注释明确，是学习该芯片的良好资料-Siemens sle4442 the code is the firmware code, mcu using c8052f340, the code structure is clear, comments clear, is to learn good information on the chip