pic12F683 , gpio.5 not accessible...

[Darrel Taylor]

Hmmm, It must be a limitation of your programmer.

I just tested it here with a 12F683 and an meLabs U2 programmer.
It works fine with the internal oscillator and MCLR either ON or OFF.
<br>

[flipper_md]

humm, it means ICD2 (clone) is less powerfull/featured than yours...
would never expected that!

or maybe I can try to let it program the chip anyways, and see what happen.

i'll try it tonight.


Thanks for testing

[mister_e]

Maybe be not less powerful... but has it's own way to work. ICD2 is more a debugger than a programmer. Melabs's one is a Programmer, period.

Cheap alternative.. the endless Microchip's PICKIT 2 suggestion.... which can also be used as a debugger on some PIC.

[sayzer]

Flipper,

How did you set your OSC to work internally at 8Mhz?

OSCCON = %01110000 ' Internal 8MHz osc set speed

I think, it should be OSCCON = %01110001

Did you notice that?

========================

[mister_e]

My 2 cents. From the datasheet

bit 0 SCS: System Clock Select bit
1 = Internal oscillator is used for system clock
0 = Clock source defined by FOSC<2:0> of the Configuration Word register

I don't feel this is the problem here, unless the config fuses aren't properly set. Default ones use the internal osc so far.

[flipper_md]

Ohh, umm, I took the speed value from another source code but I didnt double checked it...
good point that I should verify those kind of things!

All seems to run fine tough. It ran datatransfert at 19200baud using serout2, no prob.

And since I was sad about loosing a pin for a totally useless MCLR, my brain got spinning and I decided to try using one pin as A/D to read integer values of voltage(1to5). Then I will hook a 4-way switch with matching resistors and I'll get 4-5 *inputs* from that pin. uhuhuh.
I hope nothing come in my way this time...im so proud of this Einstein spark!!



Thanks Mister_E for enlightening my little knowledge of programmers.
I taught they were pretty much all equal, but now I see why mine was sold for cheap

but for now, my skills surely wouldn't make use of a 300$ programmer.

and I still have to try to overide the warning and see what happen!! 8)

[Jumper]

http://forum.microchip.com/tm.aspx?m...%2cMCLRᾬ
http://forum.microchip.com/tm.aspx?m...2cMCLR&#204739


this might explain why.... but as they say. If you power your PIC from the ICD2 and don't load it too much it might work anyway. And to get rid of this warning just use an older version on MPLAB.

/me