Abstract
CAN bus was widely used in embedded system development, but most embedded processors without CAN bus controller, need to extend external CAN bus interface through external bus. In order to send and receive the CAN bus data by S3C2440 chip, interface function of S3C2440 was extended by MCP2515 chip in the paper, which was used the SPI interface to extend CAN bus interface. The design of CAN bus hardware interface was described in the paper. The design of CAN device drive program on the embedded Linux operating system was specified in detail.
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