PIC12F1822 support - again

[Oleg Antonyan]

Since you close feature request, I try to continue here.
PIC12F1822 - this chip, NOT 12LF. It doesn't need 3.3V

[Alberto Maccioni]

The forum is more appropriated to hold a discussion.
So, it's true that only the LF version requires 3.3V, but since the device
selection list only has a generic 12F1822 the programmer requests 3.3V to be
sure it doesn't do any harm.
If you want you can fool it by shorting pins 7-8 on the left expansion
connector (RB1-RB0), so that it thinks the adapter is there.

BR
Alberto

[Oleg Antonyan]

Hi, Alberto
Thanks for your help.
So, I've tried this and get this when reading the empty new chip:

[flysnake@home test]$ op -p /dev/usb/hiddev2 -d 16F1822
Programmer detected
Firmware version 0.7.6
Hardware ID: 0.0.1 (18F2550)

Regulator up and running after T=71 ms VPP=8.1V

Reading code ... completed
Reading CONFIG area ... completed
ID0: 0x3FFF     ID1: 0x3FFF
ID2: 0x3FFF     ID3: 0x3FFF
DevID: 0x3FFF
Unknown device
Configuration word 1: 0x3FFF
Configuration word 2: 0x3FFF
Calibration word 1: 0x3FFF
Calibration word 2: 0x3FFF

Code memory:
(empty)

End (1.23 s)

Unknown device - hmmm, strange.
OK, write a simplest program, compile and flash it:

[flysnake@home test]$ make burn
op -p /dev/usb/hiddev2 -d 16F1822 -w ./temp.hex
Programmer detected
Firmware version 0.7.6
Hardware ID: 0.0.1 (18F2550)

./temp.hex :


Code memory:

0000: 2801 0188 2FF1 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
07F0: FFFF 0020 2FF6 0021 018C 0008 3187 27F3 3187 0020 018C 2FFC 098C 2FFC 2FFC 2801

Can't find CONFIG location (0x2008)
End

End (0.00 s)

And read again:

[flysnake@home test]$ op -p /dev/usb/hiddev2 -d 16F1822
Programmer detected
Firmware version 0.7.6
Hardware ID: 0.0.1 (18F2550)

Regulator up and running after T=71 ms VPP=8.1V

Reading code ... completed
Reading CONFIG area ... completed
ID0: 0x3FFF     ID1: 0x3FFF
ID2: 0x3FFF     ID3: 0x3FFF
DevID: 0x3FFF
Unknown device
Configuration word 1: 0x3FFF
Configuration word 2: 0x3FFF
Calibration word 1: 0x3FFF
Calibration word 2: 0x3FFF

Code memory:
(empty)

End (1.23 s)

Nothing changed :(
It's possible my mistake because I use chip in DFN package and it could be bad
soldering on hand-made pcb.
I can make up new pcb, but it's unlikely because of when you have disconnected
chip you get another output than here.
And also message "Can't find CONFIG location (0x2008)" is strange because if
you look in programming specification (41390C) than you see config word
located at 8007h.

[Alberto Maccioni]

If the device is unknown it means it did not enter program mode, so nothing
will ever be written; I suggest you check the connections to your DFN board;
if it's an application circuit make sure the ICSP pins are not loaded during
programming.
Regarding the config warning you can see by yourself that your file contains
data at addresses 0 and 7F0, so nothing at 8007; it's true that the config
location is wrong on the message (I just used the same string as smaller
devices) but the error is there.
Compile a simple asm source and you'll see the difference.

BR
Alberto

[Oleg Antonyan]

Hi!
2 weeks later I returned to this problem :)
Re-soldering the chip with new expensive soldering paste, new op version, make
the expansion board with 3.3Vreg - nothing changed.
Stupid DFN package - tiny and it's impossible to check how pins are soldered
with tester, because they are under the chip. To be sure this is my mistake I
will buy another few chips in DIP with next big order on digikey.