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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 GQ-4X PIC16F1934 (ICSP)

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T O P I C    R E V I E W
F-bone Posted - 10/16/2015 : 00:20:30
Hi guys,

trying to read this pic my microchip:

h**p://ww1.microchip.com/downloads/en/DeviceDoc/41364E.pdf

This device is not in the latest software list, is there a compatible chip? Or can I add it manually somehow?

I have connected the ICSP header to the PCB were the PIC is soldered using the PCBs ICSP pins.

Any help is greatly appreciated.

BR,
George
11   L A T E S T    R E P L I E S    (Newest First)
F-bone Posted - 10/20/2015 : 23:18:17
quote:
Originally posted by zzattack

If the PIC has memory read protection on you will always read only zeroes. This prevents unauthorized copying.



I think that must be the case! At least we managed to setup GQ-4X to support this chip properly :)

thank you all for your help, it is invaluable as always.
zzattack Posted - 10/20/2015 : 07:35:43
If the PIC has memory read protection on you will always read only zeroes. This prevents unauthorized copying.
F-bone Posted - 10/19/2015 : 23:10:47
quote:
Originally posted by ZLM

You need PIC16LF1934.dev file.

Try to add this line into devices.txt:

Name="PIC16LF1934",ID="294024",Class="PIC16FXXX",Category="MCU",MFG="Microchip",CodeSize="16384",EepromSize="256",Package="DIP28",PRG_MODE="0",BEGPRG_COMMAND="8",ENDPRG_COMMAND="",ERASECHIP_COMMAND="1F",BEGERASECHIP_COMMAND="8",PAGE_WRITE_SIZE="1",CFG_PAGE_WRITE_SIZE="1",CFGByteLabel="- DEBUG FCMEN IESO BOREN1 BOREN0 CPD CP MCLRE PWRTE WDTE FOSC2 FOSC1 FOSC0";

The PIC16LF1934.dev file should be included in the latest software.




Hi ZLM, thank you for the line, I can now see the device in the list but the read procedure is still giving zeros.

here is the photograph of the interface and also the screenshot of the software.

h**ps://drive.google.com/open?id=0B80HF5zjKWc1ZHhSZ1ppa2duMmc

h**ps://drive.google.com/open?id=0B80HF5zjKWc1ei1IMlc5ck55MFk

I really need to copy this chip to try and fix the instrument which cannot boot at the moment.

Any help is greatly appreciated.

BR,
George

EDIT:
Choosing "LF" designation instead of "F" (as is my chip here) the programmer passes the ID check this time. Still the read file is empty.
ZLM Posted - 10/19/2015 : 22:36:25
You need PIC16LF1934.dev file.

Try to add this line into devices.txt:

Name="PIC16LF1934",ID="294024",Class="PIC16FXXX",Category="MCU",MFG="Microchip",CodeSize="16384",EepromSize="256",Package="DIP28",PRG_MODE="0",BEGPRG_COMMAND="8",ENDPRG_COMMAND="",ERASECHIP_COMMAND="1F",BEGERASECHIP_COMMAND="8",PAGE_WRITE_SIZE="1",CFG_PAGE_WRITE_SIZE="1",CFGByteLabel="- DEBUG FCMEN IESO BOREN1 BOREN0 CPD CP MCLRE PWRTE WDTE FOSC2 FOSC1 FOSC0";

The PIC16LF1934.dev file should be included in the latest software.
F-bone Posted - 10/19/2015 : 11:13:57
quote:
Originally posted by zzattack

For simply reading PIC16F747, PIC16F74, PIC16F884 will do.



thank you zz, we ll know by tomorrow :)


EDIT: Unfortunately all I am getting is an empty binary file :(... There seems to be some activity on the device where the PIC is soldered on (LEDs etc) but the read procedure gives zeros.

EDIT2: I am using the ICSP header -=inside=- the GQ-4X programmer.
zzattack Posted - 10/19/2015 : 06:32:01
For simply reading PIC16F747, PIC16F74, PIC16F884 will do.
F-bone Posted - 10/19/2015 : 05:14:24
quote:
Originally posted by zzattack

PIC16F is always 5v part, PIC16LF is always 3.3v part.
I don't see a DIP-20 package for that PIC16.
Yes, ID check will fail if you don't use exactly the same device, but if it's compatible (enough flash) it will program.



my bad its a 40pin device... F designation. So what would you suggest I use from the list... initially to read the device and then program a new one.
zzattack Posted - 10/19/2015 : 05:01:09
PIC16F is always 5v part, PIC16LF is always 3.3v part.
I don't see a DIP-20 package for that PIC16.
Yes, ID check will fail if you don't use exactly the same device, but if it's compatible (enough flash) it will program.
F-bone Posted - 10/19/2015 : 04:10:33
quote:
Originally posted by zzattack

The LF is simply the 3.3v version of that PIC. All 28-pin PIC16F's have the ICSP pins in the same location, so any of them should work.



hi zz,

this is not "LF" but "F" family and both F and LF have the same behaviour, the 1934 version is not shown in the list altough the .dev file exists.

also my version is 20pin at 9v if I am correct. Would any other similar device be ok even if the ID check fails?

BR,
George
zzattack Posted - 10/19/2015 : 03:11:00
The LF is simply the 3.3v version of that PIC. All 28-pin PIC16F's have the ICSP pins in the same location, so any of them should work.
F-bone Posted - 10/16/2015 : 01:04:52
The weird thing is that there is PIC16F1934.dev and PIC16LF1934.dev in the Devices directory????

EDIT, guys I really need your support in this. Please provide your insight on this matter.

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