Message transceiving method and system for car CAN bus gateway
A CAN bus, message transmission technology, applied in the direction of bus network, transmission system, digital transmission system, etc., can solve problems affecting economic and social benefits, increase system load, bus competition, etc., to improve economic and social benefits. Effectiveness, guaranteed consistency, high flexibility
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[0049] The present invention will be further described below in conjunction with the drawings and embodiments.
[0050] Such as figure 1 As shown,
[0051] 1. Define the software receiving buffer and the software sending buffer for the receiving and sending of CAN messages, establish a buffer management module, and send "received new message" to the buffer management module in the CAN controller interrupt service program. The "hardware sending buffer is not full" signal is used in the buffer management module to process the messages in the software receive buffer and send the messages in the software send buffer.
[0052] 2. The software receiving buffer and the software sending buffer are structure arrays, and the structure members include message ID, message length and message data. The length of the receiving array and the sending array is set according to the CAN network load rate to ensure that there will be no buffer overflow under the condition of normal CAN network communicatio
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