成都盘沣科技汽车电子开发之二：

继续第一讲的内容，根据汽车电子整车网络开发流程第一步网络规定与协议制定，我们应该如果建立的一套完整CAN网络通信规则和协议呢？

首先，我们应该要学习如下汽车行业规范。

1、CAN总线通信标准：

ISO 11898-1 Road Vehicle - Controller Area Network (CAN) - Part 1: Data link layerand physical signalling；
ISO 11898-2 Road Vehicle - Controller Area Network (CAN) - Part 2: High-speed medium access unit；
SAE J2284-1 High-Speed CAN (HSC) for Vehicle Applications at 125 KBPS；
SAE J2284-3 High-Speed CAN (HSC) for Vehicle Applications at 500 KBPS。

2、CAN总线诊断标准：

ISO 15765-1 Road vehicles - Diagnostics on Controller Area Networks (CAN) - Part 1:General information；
ISO 15765-2 Road vehicles - Diagnostics on Controller Area Networks (CAN) - Part 2:Network layer services；

ISO 15765-3 Road vehicles - Diagnostics on Controller Area Networks (CAN) - Part 3:Implementation of unified diagnostic services (UDS on CAN)；
ISO 14229-1 Road vehicles - Unified diagnostic services (UDS) - Part 1: Specification and requirements；
ISO 15031-6 Road vehicles - Communication between vehicle and external equipment for emission-related diagnostics - Part 6: Diagnostic trouble code definitions。

3、CAN总线应用层：

具体的请参考就J1939相关协议，根据具体的车型，是由主机厂采用相关修改具体协议来设计。

明天我们将会，根据具体的协议内容作参考案例讲解。