Hi all,
I have recently custom made a PCB with TM4C129XNCZAD.
I am trying to flash a firmware image through SWD interface.
As a debugger, I am using XDS110 and CCS version is 12.4 version.
When I tred to load the image i got the following error.
-----[An error has occurred and this utility has aborted]--------------------
This error is generated by TI's USCIF driver or utilities.
The value is '-615' (0xfffffd99).
The title is 'SC_ERR_SWD_PROTOCOL'.
The explanation is:
The target failed to see a correctly formatted SWD header. The
connection to the target may be unreliable. Try lowering the
TCLK setting before trying again.
[End: Texas Instruments XDS110 USB Debug Probe_0]
I did read some reference on the forums
In the forum, they says that the error is due to MCU which is locked. and they provided solution using UART.
In my case, I currently can access the SWD interface. is it possible to unlock the MCU by SWD?
Do I have to unlock the device by using all 4pins of JTAG ?
Any advice will be very helpful.
Kind regards,
Jean
