基于CAN总线的语音节点设计

Some analogue broadcasting systems often have the problems of weak anti-interference ability and short-distance transmission, the study researches a voice communication system based on CAN bus to solve the above problems. The composition of voice communication system is given in the paper, the voice node uses microcontroller PIC18F458 which built-in CAN controller as the core controller. PIC18F458 constitute a CAN transceiver module with transceiver CTM8251 data transceiver. And choose AMBE-1000 which has the advantage of low transmission rate and high voice quality as speech coder. The testing result shows that voice node can real-time and reliable communicate with each other,and the quality of voice is stable.