Design of the common framework of LIN low-level driver

摘要

The LIN low-level driver provided by the chip manufacturers cannot cover all the chips, in some cases users have to modify or design the LIN low-level driver by themselves. To address this problem, a common framework of the driver was proposed and based on it research was carried out to realize the unconditional frame communication. The background knowledge of the LIN bus was introduced; it was pointed out that a common LIN driver framework should be based on UART (Universal Asynchronous Receiver/Transmitter)/SCI (Serial Communication Interface), timer module and interrupt. The design of the LIN driver was divided into configurable part and the fixed part; detailed discussion on the latter one was carried out, especially on the basic types, the interrupt functions and the core API. The feasibility of the framework was verified through the communication between the test circuit board and the Emulin. The analysis shows that this method is applicable to many chips and can accelerate the development progress.