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大家好,我正在使用MS09254A上的数字逻辑分析仪探头来调试带有JTAG的ARMv7 CPU。
我做了设置并将探针放在接地引脚,TDI,TDO,TMS和TCK上。 输出的第一部分看起来很好。 然后输出显示在JTAG状态期间它不应该存在输入和输出(I / O)的累积。 以下是我得到的:time TAP状态操作码/ Reg Len数据45e-9 Select-DR 141e-9 Capture-DR 245e-9 Shift-DR TDI 4 11110000 245e-9 Shift-DR TDO 4 10000000 645e-9 Exit1- DR 741e-9 Update-DR TDI 4 11110000 741e-9 Update-DR TDO 4 00010000 845e-9 Select-DR 19.645e-6 Select-IR 19.741e-6 Capture-IR 19.845e-6 Shift-IR TDI 4 01010000 19.845 e-6 Shift-IR TDO 4 10000000 20.341e-6 Exit1-IR 22.645e-6 Update-IR TDI 4 10100000 22.645e-6 Update-IR TDO 4 00010000 22.741e-6 Select-DR 25.541e-6 Capture-DR 25.645e-6 Shift-DR TDI 35 01000000 10000000 00000000 00000001 01000000 25.645e-6 Shift-DR TDO 35 01000000 00000000 00000000 00000001 11100000 31.645e-6 Exit1-DR 31.741e-6 Update-DR TDI 35 01010000 00000000 00000000 00100000 01000000 31.741 e-6 Update-DR TDO 35 11110000 00000000 00000000 00000000 01000000 31.845e-6空闲31.941e-6选择-DR 34.845e-6 Capture-DR 34.941e-6 Shift-DR TDI 35 11000000 00000000 00000000 00000000 00000000 34.941e-6 Shift-DR TDO 35 01000000 00000000 00000000 00000001 11100000 40.74 1e-6 Exit1-DR 40.845e-6 Update-DR TDI 35 00000000 00000000 00000000 00000000 01100000 40.845e-6 Update-DR TDO 35 11110000 00000000 00000000 00000000 01000000有关我为什么会这样做的任何想法? 以上来自于谷歌翻译 以下为原文 Hi all, I'm using the digital Logic Analyzer probes on the MS09254A to debug an ARMv7 CPU with JTAG. I did the setup and put the probes on the ground pin, TDI, TDO, TMS, and TCK. The first part of the output looks fine. Then the output shows that there's an accumulation of input and output (I/O) during JTAG states that it shouldn't. Here's what I'm getting: Time TAP State Opcode/Reg Len Data 45e-9 Select-DR 141e-9 Capture-DR 245e-9 Shift-DR TDI 4 11110000 245e-9 Shift-DR TDO 4 10000000 645e-9 Exit1-DR 741e-9 Update-DR TDI 4 11110000 741e-9 Update-DR TDO 4 00010000 845e-9 Select-DR 19.645e-6 Select-IR 19.741e-6 Capture-IR 19.845e-6 Shift-IR TDI 4 01010000 19.845e-6 Shift-IR TDO 4 10000000 20.341e-6 Exit1-IR 22.645e-6 Update-IR TDI 4 10100000 22.645e-6 Update-IR TDO 4 00010000 22.741e-6 Select-DR 25.541e-6 Capture-DR 25.645e-6 Shift-DR TDI 35 01000000 10000000 00000000 00000001 01000000 25.645e-6 Shift-DR TDO 35 01000000 00000000 00000000 00000001 11100000 31.645e-6 Exit1-DR 31.741e-6 Update-DR TDI 35 01010000 00000000 00000000 00100000 01000000 31.741e-6 Update-DR TDO 35 11110000 00000000 00000000 00000000 01000000 31.845e-6 Idle 31.941e-6 Select-DR 34.845e-6 Capture-DR 34.941e-6 Shift-DR TDI 35 11000000 00000000 00000000 00000000 00000000 34.941e-6 Shift-DR TDO 35 01000000 00000000 00000000 00000001 11100000 40.741e-6 Exit1-DR 40.845e-6 Update-DR TDI 35 00000000 00000000 00000000 00000000 01100000 40.845e-6 Update-DR TDO 35 11110000 00000000 00000000 00000000 01000000 Any ideas on why I'm getting this? |
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这可能是联系您当地技术联络中心的一个很好的问题。
首先应该检查一些事项: - 运行范围是什么操作系统? - Scope SW版本是最新的吗? 正确的取决于Scope OS。 它将是4.20,4.60或5.50。 - 您是否拥有所有其他与范围相关的应用程序的最新版本? 如果他们问,你能保存并发送范围跟踪,以便他们可以复制问题吗? 你期望在解码中看到什么? 你确定你所看到的是错的吗? 免责声明:为了获得更可靠的响应,您应该考虑致电当地的Keysight技术呼叫中心。 Keysight论坛在“可用”的基础上进行监控,并不一定是解决技术问题的最快方式。 以上来自于谷歌翻译 以下为原文 This might be a good problem to contact your local Technical Contact Center about. There are a few things that should be checked first: - What OS is the scope running? - Is the Version of Scope SW the latest? The correct one depends on the Scope OS. It would be either 4.20, 4.60 or 5.50. - Do you have the latest version of all of the other scope-related apps? If they ask, can you save and send a scope trace so that theyy can replicate the problem? What do you expect to see in the decode? Are you sure that what you are seeing is wrong? Al Disclaimer: For more reliable response, you should consider calling your local Keysight Technical Call Center. The Keysight Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered. |
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