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2022-7-12 17:47
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前言 2021年5月份,北汇基于对IOP测试的理解和经验积累,根据OPEN Alliance1000BASE-T1(Draft)物理层测试规范,采用了基于Vector CANoe、VN5650、VT System和TechnicaGolden Device组合式的方案,实现了1000BASE-T1 IOP测试。如今,北汇基于Technica公司升级版的Golden Device,推出“一站式”100&1000BASE-T1 IOP测试解决方案。 测试方案简介 针对100BASE-T1和1000BASE-T1的IOP测试项,Link-up Time与SignalQuality的测试要求完全相同,其中OABR_CABLE_03:Cable diagnostics for good cable是针对千兆新增测试项。如下将介绍各测试项的实现方案。 Link-up Time ▲Link-up Time - Trigger:Power on Link Partner ▲被测控制器上电且唤醒,使用Vector CANoe CAPL编程触发Golden Device的Link-up Time - Trigger:Power on Link Partner测试程序,Golden Device自动记录每次的Link时间并回传给Vector CANoe软件 图1 Link-up Time - Trigger:Power on Link Partner测试接线图 ▲Link-up Time - Trigger:Power on DUT 使用Vector CANoe CAPL编程触发Golden Device的Link-up Time - Trigger:Power on DUT测试程序,Golden Device自动记录每次的Link时间并回传给Vector CANoe软件 图2 Link-up Time -Trigger:Power on DUT测试接线图 ▲Link-up Time - Trigger:Wake-Up DUT 被测控制器处于休眠状态,使用CANoe CAPL编程触发Golden Device的Link-up Time - Trigger:Wake-Up DUT测试程序,Golden Device自动记录每次的Link时间并回传给CANoe软件 图3Link-up Time - Trigger:Wake-Up DUT测试接线图 Signal Quality ▲OABR_SIGNAL_01:Indicated signal quality for channel with decreasing quality ▲OABR_SIGNAL_01:Indicated signal quality for channel with decreasing quality 将Golden Device的Link Partner与被测控制器PHY端口连接,通过CANoe CAPL编程修改噪声模式(100BASE-T1/1000BASE-T1)和噪声等级,以及发送被测控制器测试指令获取DUT的SQI和Link Status 图4Signal Quality测试接线图 Cable Diagnostic ▲OABR_CABLE_01:Cable diagnostics for near and far end short ▲OABR_CABLE_02:Cable diagnostics for near and far end open ▲OABR_CABLE_03:Cable diagnostics for good cable 将Golden Device的故障注入模块串联在Link Partner端口和被测控制器PHY端口之间,通过CANoe CAPL编程实现短路/开路故障自动注入功能,以及发送被测控制器指令获取DUT的Cable Status 图5 OABR_CABLE测试接线图 测试案例简介 测试工程 基于CANoe CAPL编写的IOP自动化测试脚本。支持CAN/CAN FD应用报文、CAN/CAN FD诊断报文、RS232、ADB 等方式获取PHY SQI以及线缆状态值的读取。 图6 基于CANoe的操作界面 测试报告 CANoe 软件解析、记录Golden Device回传的结果,并对全部数据结果进行汇总整理方便查看以及问题分析。 图7 测试报告样式 总结 测试方案对比 回顾车载以太网IOP的测试方案迭代历程,北汇从推出满足TC8 1.0使用电阻作为干扰噪声的测试方案,到满足TC8 2.0/3.0联合Technica 百兆Golden Device和R&S噪声发生器的测试方案,到如今可同时满足100BASE-T1和1000BASE-T1的“一站式”测试方案,其中的每一次测试方案升级都紧跟测试需求的步伐,在行业同仁、合作伙伴的支持协助下,完成了一次又一次技术升级。 近1年来,汽车人又开始研究10BASE-T1S和MultiGBASE-T1技术的发展前景和应用场景,Open联盟也成立了TC14和TC15小组制定相关的测试标准,在draft版本中体现了对应的测试内容。 TC14(10BASE-T1S) 典型测试条目如下: ▲proper communication of transmission cycles under different stressconditions ▲PLCA robustness for stressing of clock synchronization andPLCA state machine ▲PLCA diagnostic ▲Signal Quality ▲Harness Defect Detection ▲Topology Discovery ▲Wake-up Sleep TC15(MultiGBASE-T1) 典型测试条目如下: ▲Reliability of indicated link status directly after link-up/ PHY reset ▲Reliability of indicated link status when connected to linkpartner with same MASTER/SLAVE configuration ▲Revoke of link status after link-down ▲Link-up after PHY-reset ▲Link-up after reset of link partner ▲Indicated signal quality for channel with decreasing quality ▲Indicated signal quality for channel with increasing quality ▲Cable diagnostics for error-free channel ▲Cable diagnostics for near and far end open ▲Cable diagnostics for near and far end short 北汇会陆续推出10BASE-T1S和MultiGBASE-T1的IOP测试解决方案,敬请期待。北汇愿与大家持续进行技术分享,共同进步! 参考文献 IEEEStandard for Ethernet:Amendment 1: Physical LayerSpecifications and Management Parameters for 100 Mb/s Operation over a SingleBalanced Twisted Pair Cable(100BASE-T1) IEEEStandard for Ethernet:Amendment 4: Physical LayerSpecifications and Management Parameters for 1 Gb/s Operation over a SingleTwisted-Pair Copper Cable OPEN Alliance Automotive Ethernet ECU Test Specification_TC8 V1.0 OPEN Alliance Automotive Ethernet ECU Test Specification_TC8 V2.0 OPEN Alliance Automotive Ethernet ECU Test Specification_TC8 V3.0 OA_100BASE-T1_Interoperability_Test_Suite_V1.0 OA_1000BASE-T1_Interoperability_Test_Suite_V1.1 MultiGBASE-T1 Interoperability Test Suite_V0.2 10BASE-T1S Half-Duplex Multidrop Interoperability Test Suite_V0.2 Golden Device User Manual