How to debug JTAG issues / libgpiod

[tuctboh]

Hi,

RPi 4, self compiled openFPGALoader from a git clone.

tuc@CPLID7:~/openFPGALoader/build $ ./openFPGALoader -c libgpiod  --pins 22:27:17:4 ~/SDC72XL.jed  -v
found 1 devices
index 0:
	idcode 0x9604093
	manufacturer xilinx
	family xc9500xl
	model  xc9572xl
	irlength 8
File type : jed
Open file end
theorical checksum 5e1a -> 5e1a
array size 1
DONE
Erase flash DONE
Write Flash: [==================================================] 100.00%
Fail

Any way to get more debug information? Anything I can do to understand why it failed? And when I do see -

tuc@CPLID7:~/openFPGALoader/build $ ./openFPGALoader -c libgpiod  --pins 22:27:17:4 ~/SDC72XL.jed 
Open file DONE
Erase flash DONE
Write Flash: [==================================================] 100.00%
Done

Is there any way to tell that it's on the chip properly? I see there is --verify but it says its for SPI only, and when I do try I get -

Erase flash DONE
Write Flash: [==================================================] 100.00%
Done
Read Flash: [==================================================] 100.00%
Done
Verify Flash: [==================================================] 100.00%
Fail
Error: wrong value: read 80 instead of 00

100% of the time

Thanks, Tuc