PFS122 support

[spth]

A while ago, Padauk released the PFS 122.

Since this is a flash device, I'd expect it to be popular among hobbyists, and it would be good to have support for it.

[kibix]

I am happy to pay a bounty and support testing if PFS122 support can be added

[bonnom]

JS added PFS122 to the development branch last week! So you can start testing it out.
It seems like the PFS122 is just a PFS173

[kibix]

Yes, thanks for the hint !
I tested today with the previous version, selecting the PFS172 (that is also as what the chip identifies), and it programs well. The include files for SDCC are missing a register for the PFS122 (which has 16bit results from AD, compared to 8bit on other models), but that is, obviously, trivial to fix.

So i can confirm that even without a specific PFS122 setting, the chip can be correctly programmed by selecting PFS172.

Cheers

Johannes

[bonnom]

I think the PFS172 may have already had a 12bit ADC.
For the PFS173 they discovered at least 11bits of the adc https://free-pdk.github.io/undocumented-features#11-bit-adc-pfs173.
If you have an PFS172 you can try to read the lower adc bits from the adress 0x23!