Patent ID: 7650449
Filing Date: 2010-01-19
Classification: G06F

Abstract:
1. A communication system comprising: a plurality of communication devices, each of the communication devices comprising: a universal asynchronous receiver/transmitter (UART) interface, the communication devices connecting with each other via the UART interfaces thereof; a central processing unit (CPU); a selecting apparatus connected to the CPU for defining one of the communication devices as a master communication device and the rest as slave communication devices; and a multiplexer (MUX) connected between the UART interface and the CPU, the master communication device transmitting data carrying an ID to the slave communication devices according to the definition by the selecting apparatus, a slave communication device corresponding to the ID receiving and processing the data, and transmitting return data to the master communication device, and the MUX of the master communication device receiving the return data from the slave communication device and passes it to the CPU of the master communication device for processing.