DSP based Ethernet communication method in fault recording system
A technology of fault recording and communication method, which is applied in the field of Ethernet communication, can solve the problem of large data volume and achieve the effect of small memory capacity
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[0052] The present invention will be further described below in conjunction with the accompanying drawings.
[0053] figure 1 It is a flow chart of network data input in the DSP system in the present invention. The input process of network data among the present invention is:
[0054]The input of network data is usually initiated by the receiving message interrupt of the Ethernet controller, and the DSP will read all new message data from the Ethernet controller after receiving the interrupt. The received message must go through the TCP / IP protocol stack demultiplexing (Demultiplexing), and gradually parsed before being transmitted to the user application layer.
[0055] In the DSP main control system, the input of network data is divided into two stages: the stage of receiving and receiving messages by the Ethernet driver and the stage of dividing the received messages by the protocol stack.
[0056] In the receiving message interrupt service program, the Ethernet driver s...
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