Design of Meter Information Module for City Buses

The information from bus sensors is not able to perform on the in-vehicle meter directly because original information is not compatible with transmitting. To overcome this challenge, the authors designed a meter information module (MIM), whose fundamentals were collecting, processing and sending signals. The MIM chose Freescale´s HCS12 Microcontroller Unit (MCU) as its core component and Controller Area Network (CAN) as its communications. Both software and hardware of the MIM were described by corresponding algorithms, diagrams and circuits. Finally, the simulation experiment demonstrated that results achieved expectations. This MIM can be applied to engineering practice and meet the future development of automotive electronics.