The Design and Debugging of CAN232 Converter with Acceptance Filter Based on ARM Microcontroller

This paper introduces intelligent converter of CAN with acceptance filtering and RS232. It describes system design and original debug method in detail. The hardware uses the ARM microcontroller whose inside include CAN controller. The software includes the communication protocol,the data format conversion between CAN and RS232,the setting of CAN acceptance filtering, etc. Those can help to design other converters, CAN and RS485,CAN and RS422, serial port and Ethernet, CAN and Ethernet, etc. Because of modularization design of software, the modules of CAN transmission, reception and CAN acceptance filtering have been directly used for the design of automotive electronics.