Info: Could not measure total IR len. TDO is constant hig

[fumeilai1]

Info: Could not measure total IR len. TDO is constant high. Invalid core Id. (0x00000000)  What's wrong ?

我后来换了很多MCU，还是jtag不通，软件也设置了很多遍；MCU运行程序没有问题，ISP下载也没问题，串口收发都没问题；后来我按照LPC2104的产品手册，把RCK引脚拉高了，还是不行，把其它TDI TDO TMS等引脚上拉下来电阻都去掉，还是jtag不通。能是什么原因呢？

[fumeilai1]

到现在没解决，换了MCU还不行呢！有人能远程连线帮我诊断一下吗？NXP能人们？

Even I soldered a new MCU , the jtag chain still does not link the mcu ; The mcu ID is not readable .  Why? Is there someone remote diagnosis it for me? 

[FelipeGarcia]

Hi wang xinwang,

Are you erasing the flash sectors before trying to flash the device?

Regards,

Felipe

[fumeilai1]

Why the ISP reading and downloading does not always work ?  Well , the ISP downloading just work at 9600 baud rate, why ? What should i check ?

ISP 下载总是失败，需要反复上电复位拉低ISP，我的ISP操作应该对，即使偶尔成功，也只能工作在9600波特率 ？为什么？

[1429011742]

请问你是否已经解决这个问题，我这里也碰到这样的问题了。

[fumeilai1]

没有解决，技术支持没有，在论坛里留言吧！继续发帖吧

在 2019-04-28 14:14:41，"1429011742@qq.com" <admin@community.nxp.com> 写道：

|

|

NXP Community

|

|

Re: Info: Could not measure total IR len. TDO is constant high.

reply from rio li in LPC Microcontrollers - View the full discussion

请问你是否已经解决这个问题，我这里也碰到这样的问题了。

Reply to this message by replying to this email, or go to the message on NXP Community

Start a new discussion in LPC Microcontrollers by email or at NXP Community

Following Re: Info: Could not measure total IR len. TDO is constant high. in these streams: Inbox

This email was sent by NXP Community because you are a registered user.

You may unsubscribe instantly from NXP Community, or adjust email frequency in your email preferences

|

|

[r_ynfaxy]

Hey,as many users are following forum who knows only English..So can u pls submit your question in English..So that we can help u...Would love to  help u if i can www.dqfansurvey.com

[fumeilai1]

Is that I had soldered   the MCU chip broken  ?

[fumeilai1]

jtag is failed , why? iSP download is ok. user's programs run ok ; Sometime 485 communication link fails; Jtag link failed always ; How about the DBGSEL , What does it matter? How to set it up ? How should I set them here ? How should I see the CRP through flashmagic ? The flashmagic pop message that " the device (LPC2104) doesn't support the operation " when I read the signatures through ISP with the FlashMagic ; I can download program obj through Flashmagic in 9600 baud rate .

[fumeilai1]

jtag  is failed , why? iSP download is ok. user's programs run ok ; Sometime 485 communication link fails; Jtag link failed always ;

How about the DBGSEL , What does it matter? How to set it up ?

How should  I  set them here ?

How should I see the CRP through flashmagic ?  The flashmagic pop message that " the device (LPC2104) doesn't support the operation " when I read the signatures through ISP with the FlashMagic ; I can download program obj through Flashmagic in 9600 baud rate .

[fumeilai1]

jtag  is failed , why? iSP download is ok. user's programs run ok ; Sometime 485 communication link fails; Jtag link failed always ;

How about the DBGSEL , What does it matter? How to set it up ?

How should  I  set them here ?

How should I see the CRP through flashmagic ?  The flashmagic pop message that " the device (LPC2104) doesn't support the operation " when I read the signatures through ISP with the FlashMagic ; I can download program obj through Flashmagic in 9600 baud rate .

[fumeilai1]

jtag  is failed , why? iSP download is ok. user's programs run ok ; Sometime 485 communication link fails; Jtag link failed always ;

How about the DBGSEL , What does it matter? How to set it up ?

How should  I  set them here ?

How should I see the CRP through flashmagic ?  The flashmagic pop message that " the device (LPC2104) doesn't support the operation " when I read the signatures through ISP with the FlashMagic ; I can download program obj through Flashmagic in 9600 baud rate .

[fumeilai1]

还是这样，比如你给我发个程序，我能从软件上看，哪里有错误吗，串口能用啊 串口打印输出啊

有程序吗？我加载测试一下呢

再比如我怎样打印输出，看系统工作是否ok，时钟是否正常，影响通信的问题是否存在？

这块板子，麻烦您帮我再看看，前面485通信出现过连接不成功，当时考虑可能和画板不规范有关，24V和5V用的一个地；可后来，莫名的485通信又都好了，没问题了。我怎么通过串口打印输出看看mcu内部工作状态呢 或者通过串口命令查询呢

很多程序内部mcu状态信息都能用程序读出来吧

我看看吧 只要打印相应地址内容就好了呗

只是没有调试器直观

我换一个新的肯定就好了，但是还是不知道原因。

这块儿应该怎么设置呢?

这个DBGSEL应该怎么设置？

"进入ISP模式，通过Flash Magic工具查看一下，MCU是否有被使能了CRP。"收到您上面的回复，我在flashnmagic里面具体怎么操作呢？

当我选成波特率9600时是可以isp下载程序目标文件的，可是isp无法进行其它操作，比如读id签名啥的，都不行。

致敬！

[FelipeGarcia]

Hi wang xinwang,

For a better understanding. Could you please submit your question in English?

Regards,

Felipe

[FelipeGarcia]

Hi wang xinwang,

Please try the following:

Regaining debug access to target MCU

Have a great day,
Felipe

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------