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Posted: **Mon Mar 25, 2019 9:54 pm**

Hi, have done a simple flowcode program just to flash a led on 1 pin

It converts to C and HEX fine. When I come to download the program into the 12F683 MCU,Mikroprog programmer says it sees a 12F508 MCU instead of 12F683 as selected?

I've attached the flow chart and the error message.Any help will be appreciated. Thanks guys...........John

Posted: **Mon Mar 25, 2019 10:32 pm**

Hi John,
12F508 is the default device if communications fail.
I have a 12F683 connected and will deliberately set target deceive for the wrong device e.f 12F1840.
Select Read will all connections correct:

Device connected correctly.png: (7.83 KiB) Downloaded 2520 times

Now will remove wire from programmer PGC to target device and click on Read:

Device not connected correctly.png: (8.5 KiB) Downloaded 2520 times

.
So best to double check connections.
From the blue end of ribbon cable which is pin1:

Code: Select all

Programmer   Chip
1     -   VCC(pin1)
2     -   PGC(pin6) 
3     -   PGD(Pin7)
4     -  MCLR(Pin4)
5     -  GND(pin8)

Re Flowchart:
C code with

Code: Select all

osccon=0x70;

should be before the main loop and not inside.
osc needs to be internal and not external.
Watchdog timer needs to be off not on.
If you have got an external pull-up resistor between MCLR and VCC then master clear enable is ok on external.
If no pull-up resistor then master clear enable needs to be changed to internal.

Posted: **Mon Mar 25, 2019 10:35 pm**

Thanks very much.I'll try your suggestions out and let you know Tuesday.Thanks again.............John

Posted: **Mon Mar 25, 2019 11:19 pm**

You're welcome John.
I guess it would have been less misleading if error pops up with 'Error - Unable to establish communication's'
Rather than 'Device Detected - 12F508'
But it is what it is.

Posted: **Wed Mar 27, 2019 9:13 am**

Thanks Martin, all is good.Thanks for your patience and time.

Posted: **Wed Mar 27, 2019 9:16 am**

Hi John,
Glad it's all working.
What was the issue?
It helps anyone else who has the same problem.

Posted: **Thu Mar 28, 2019 10:09 am**

I was using a bread board with jumper leads.

Turns out one of the jumper leads was faulty. Could have kicked myself!!!Anyway, thanks for your time.

Take care.....John

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