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EV_COG_AD4050LZ IAR 'Fatal error: Failed to connect to CPU" when attempting to debug

Thread Summary

The user encountered issues with 'Download and debug' on the ADuCM4050 chip using IAR FS for ARM v8.50.10, with both EV_COG_AD4050LZ development boards failing to connect to the CPU. The solution involves pressing and holding the RST and BOOT buttons, releasing RST first, then BOOT, and erasing the flash at 115200 baud rate.
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Category: Hardware
Hi,
 
I am working on some code using low power modes on the ADuCM4050 chip, currently using the EV_COG_AD4050LZ development board. I have two boards, both of which were working correctly and neither of which work now.
 
I am using IAR FS for ARM v8.50.10. When I attempt 'Download and debug', I get the following message appear:
 
 
Previously I did not have this problem, I could download and debug successfully with IAR. One of the two boards stopped working a while go, the other has stopped working recently.
 
If the board is powered off, I get a different error ("Probe not found").
The webpage https://www.keil.arm.com/packs/aducm4x50_dfp-analogdevices/boards/ successfuly identifies the connected device.
 
The last program that I flashed on the board is still running correctly, as one of the green LEDs near the on/off switch is blinking at the correct rate for my application. There is a red LED on right next to the user LED that is on, I don't recall if that was on before this problem occurred.
 
Using the CrossCore utility, I cannot erase flash. I get this same output regardless of the chosen baud rate:
 
 
How can I unbrick my boards?
 
Best regards,
Adam
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