A multi-processor distributed control scheme for measuring instruments is proposed, and the SPI communication design between DSP and ARM transplanted with Linux operating system is emphasized. For such a specific system, the SPI driver development under Linux must be completed first, and then the application development under ARM and DSP can be carried out. These aspects are introduced in detail, a communication protocol for ARM and DSP communication is given, and SPI communication between ARM and DSP is implemented based on this protocol.
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