Hello, I am trying to use flashrom to program a Winbond W25Q128FV chip, on a Supermicro X10DRT-L mobo, with a Dediprog SF 100.
I am running flashrom from an Ubuntu VM on a Win10 laptop as well as from a Minnowboard Max system running Ubuntu. I am running flashrom v0.9.9-rc1-r1942, installed via apt. I am connecting to the chip via a SOIC clip.
I should note that I have looked at the product support data on the flashrom web site. It lists full support for the W25Q128FV. It does not list the X10DRT-L mobo.
flashrom almost never "sees" the flash chip (output: "No EEPROM/flash device found.").
I say "almost", b/c it did see it a couple of times (out of, I would say, ~100 tries) - which was enough for me to read out the pre-existing content, and write to it an image that has effectively bricked it. :-) So, now I'm trying to flash the pre-existing content back... (There is no documented way to force the X10DRT-L to use the recovery block, and I have yet to find an undocumented way...)
I have tried with the system board plugged in and unplugged, and with and without connecting the VCC pin to the programmer.
I have been using these two command lines, at various times: flashrom -p dediprog flashrom -p dediprog:voltage=3.5
When I add -VVV, the following relevant lines appear in the output:
Probing for Winbond W25Q128.V, 16384 kB: programmer_map_flash_region: mapping W25Q128.V from 0x00000000ff000000 to 0x0000000000000000 dediprog_spi_send_command, writecnt=1, readcnt=3 RDID returned 0xff 0xff 0xff. RDID byte 0 parity violation. probe_spi_rdid_generic: id1 0xff, id2 0xffff programmer_unmap_flash_region: unmapped 0x0000000000000000
...and further down...
Probing for Winbond unknown Winbond (ex Nexcom) SPI chip, 0 kB: dediprog_spi_send_command, writecnt=1, readcnt=3 RDID returned 0xff 0xff 0xff. RDID byte 0 parity violation. probe_spi_rdid_generic: id1 0xff, id2 0xffff
One more datapoint: When I connect my laptop -> Dediprog -> to the flash chip on the Minnowboard Max (Micron 25Q064A), it does recognize the chip.
Any advice would be appreciated!