本文以 C8051F120 單片機為背景，在CAN V2.0 技術規范的基礎上提出了一種基于單
片機的CAN 應用層協議。文中首先設計了一種數據傳遞格式，它解決了CAN V2.0 規范
只能傳遞小于8 字節數據的缺點，實現了大于8 字節數據的準確傳輸。并在此基礎上，建
立了可靠的收發機制、管理機制和錯誤處理機制共同維護協議的運轉，實現了CAN 總線
數據方便快捷的傳輸。
關鍵詞: CAN 總線 通信協議 C8051F120
Abstract:This paper proposed a CAN protocol of application layer based on CAN specification 2.0A with the background of C8051F120 microcontroller. At first, has
designed a data format in transfering, which can transfer data more than 8 bytes
based on CAN specification 2.0A and makes up for the shortage of CAN protocol
of application layer based on the data structure, and has established the reliable
receiving and dispatching mechanism, the management mechanism and the error
processing mechanism and so on, which maintains the protocol work smoothly and attains
the convenient and prompt transmission through CAN bus.
Keyword: CAN;BUS; Communication Protocol; 8051F120