I have a PICkit2 with the Low Pincount Board from Microchip. It came with a 16F690 installed. And I
went through a few hello-world-variations with GCB fine. A great tool!
My real project is going to use a 12F675 instead, though. And I am having a hard time getting that
to run. Now the problem may be anything but GCBasic related, I am a real newbie at this, but
maybe someone can still help me.
Hardwarewise I added a connection on the Low Pin Count Board from Pin 5 to JP4. I did that to
have a LED connected to GP2 / PortA.2. Instead of the PortC-Connections that are standard
on the board.
The program is very very simple:
#chip 12F675,4
Do Forever
Set PORTA.2 On
Wait 500 ms
Set PORTA.2 Off
Wait 500 ms
Loop
It compiles fine and gets transferred using the PICkit2. I checked the box "VDD PICkit2" box
to power the PIC on the Board. But nothing happens.
I have tried a lot of combinations of the #config and #chip settings but I could not get
any visible reaction.
Putting back in the 16F690 and "#chip 16F690,4" in my sample program works fine.
I have also tried several chips in case I fried one before.
What else can I try to debug this or even get it working?
Thanks for reading so far,
Marian
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Hi,
I have a PICkit2 with the Low Pincount Board from Microchip. It came with a 16F690 installed. And I
went through a few hello-world-variations with GCB fine. A great tool!
My real project is going to use a 12F675 instead, though. And I am having a hard time getting that
to run. Now the problem may be anything but GCBasic related, I am a real newbie at this, but
maybe someone can still help me.
Hardwarewise I added a connection on the Low Pin Count Board from Pin 5 to JP4. I did that to
have a LED connected to GP2 / PortA.2. Instead of the PortC-Connections that are standard
on the board.
The program is very very simple:
#chip 12F675,4 Do Forever Set PORTA.2 On Wait 500 ms Set PORTA.2 Off Wait 500 ms LoopIt compiles fine and gets transferred using the PICkit2. I checked the box "VDD PICkit2" box
to power the PIC on the Board. But nothing happens.
I have tried a lot of combinations of the #config and #chip settings but I could not get
any visible reaction.
Putting back in the 16F690 and "#chip 16F690,4" in my sample program works fine.
I have also tried several chips in case I fried one before.
What else can I try to debug this or even get it working?
Thanks for reading so far,
Marian
Sorry for showing up as "nobody". Have registered now.
Marian
Hi,
Figured it out after more surfing! I am sorry for being so dumb.
The problem was that there is no PORTA for the 12F675, but it is called GPIO
instead. I got a hint only after adding a
DIR PORTA OUT
to my program and found out that it won't compile :-). When researching that
problem I finally hit the right google lode.
Thank you very much for a great product!
Ciao, MM
On most of the 8 pin PICs, you need to refer to the IO port as GPIO. Try changing "PORTA.2" to "GPIO.2".
I have confused myself several times with this, especially when taking code from a bigger PIC and putting it on a smaller one!
No problem, it was an easy question to answer. I should probably have the compiler give a warning for that.
And just to complicate things, on the newer 12F1s like the 12F1822 the port is called PORTA!