A Design Of SPI Dirver Referenced By AUTOSAR Structure

With the evolution of auto industry, automotive electronics industry has entered anew period of development, the software architecture system which take AUTOSAR asrepresentative sweeps all major automobile manufacturers around the world and it alsobegan to lead the trend of automotive electronics. The software under AUTOSARarchitecture makes detailed division for software modules, engages in details provisionsfor functions, type of variables and relationship of calling and other factors. Its purposeis to enable developers to maximize the reduction of development costs, so thatapplication developers can focus on the application software layer, ignoring thelimitations of low-level driver software and hardware platform. When system needsupdate, just settle it in replacing the low-level driver module, that means the originalapplication strategy update to a new platform without having to care about the differencebetween the MCU.This architecture has been welcomed by the great majority of the automobilemanufacturers, so that more software company join in the development teams of theAUTOSAR standard for the sake of more orders. These days AUTOSAR organizationhas developed specification for16/32bits machine from Freescale, Infineon, Renesasand ST company and It’s mature commercial software had already enter the market. Dueto the limited resources in the Flash or RAM of8bits machine, They are not establish astandard for it. But the compact version of AUTOSAR standard has already entered theresearch stage with government support in India where the8bits machine is the maintrend. Take into account the standardization of software can be configured to themainstream direction of future development of automotive electronics,8machine is hardto replace in the short term in the modern automotive electronics hardware. Therefore,AUTOSAR standard software on the platform of eight machine has a larger value inrecent times.This article based on the AUTOSAR ideas and focus on the important and complexSPI modules, researching for SPI module under AUTOSAR standard and its codefeasibility from the view of interface and function call, writing a SPI drive which cancompatible current AUROSAR standard.