用于下位机与单片机之间通过串口来收发字节。-To lower place machine with single chip microcomputer via a serial port to send and receive bytes.

usb转无线进行数据传输的程序。无线发送数据需要配套相应的就收器，才能接受，协议在程序里可以看出来。-hello，my english is poor，sorry

用51单片机和magtek实现磁卡三个磁道的解码，并读取磁卡的数据，输出到串口。-With 51 single-chip microcomputer and magtek swipe CARDS three track of decoding, and reads the file data, output to the serial port.