MIMXRT1170EVKB not responsive (D39 blinking fast)

[alex0]

I left my EVKB board connected to the docking station overnight. Debug USB was connected to a docking station that was connected to a Windows laptop that went to sleep.

When I came back to it the next day, I couldn't find the COM port in device manager and the D39 was blinking fast. In normal operation, that LED blinks slowly. I tried to short JP3 and run program_CMSIS.cmd, but I get the same "Configure board for ISP mode and connect via USB then press Space."

With JP3 shorted, D39 is solid. I tried running blhost:
Error: UsbHidPeripheral() cannot open USB HID device (vid=0x15a2, pid=0x0073, sn=).

The board is essentially unusable at the moment. I do not have a JTAG to test the other connection. Thing is - this happened before, but I don't remember how I fixed it.

[alex0 · Accepted solution]

SOLVED: After leaving both USB and power disconnected for a few days - the issue was resolved. Leaving it disconnected for a few hours didn't solve it.

[Littell]

That's even weirder than requiring a powered hub!

[alex0]

Indeed! What I find odd is that a fast blinking LED was clearly added to indicate something. There IS some software running somewhere that is controlling this. But I couldn't find any documentation on it.

[Littell]

I always use a powered hub to connect to the EVKB's on-board MCU-Link.  Until I did that the behavior varied from not-at-all to unpredictably unreliable.  The RT's USB ports don't appear to have the same requirement.

[EdwinHz]

Hi @alex0,

Please follow the instructions shown on the following knowledge base article to recover debug access to your i.MX RT1170: RT board recovery for debugger connect issues - NXP Community

[alex0]

This doesn't work. 

The guide is asking for a working probe - which is not the case in my situation.

Neither the IDE, the LinkServer, nor the SPT recognize the board. As I said - the USB is not recognized.

[EdwinHz]

Hi @alex0,

In this case, try reinstalling the firmware for your debugger by following the steps of the following article: Using J-Link with MIMXRT1170-EVKB - NXP Community to set the debugger to J-Link firmware.

BR,
Edwin.

[alex0]

Hi @EdwinHz

I did exactly what the guide said, but couldn't get past the "Configure board for ISP mode and connect via USB then press Space." message.

I ran program_JLINK.cmd as administrator. JP3 is connected. I tried once with JP5 and once without. It doesn't work. D39 is ON. SW1 is OFF OFF OFF ON.

[EdwinHz]

Hi @alex0,

If the script continues sending the message "Configure board for ISP mode and connect via USB then press Space." it means that the debugger is not in ISP mode. Make sure there is a proper connection between the pins in JP3. Perhaps try using another mini jumper cap?

[alex0]

Hi @EdwinHz ,

As I've explained, once the jumper is placed the LED stops blinking fast and goes fully red. Therefore it is unlikely a connectivity issue. I also hear the Windows connect/disconnect sound (which I don't hear when the JP3 is open). But the script doesn't detect it.

Please advise. Due to slow response times, have now burnt through a week of R&D time on simple troubleshooting steps that are publicly viewable on the knowledge base. The core issue of the post has not been addressed. D39 blinking fast is a unique issue that I had not observed in other community posts, the knowledge base, nor in any documentation. What does it mean?

Is there a more direct communication channel that we can escalate this to, or speak with someone else?

Thank you.