Thermocouple and the official firmware

I am trying to build the Extruder sketch from reprap-mendel-20100806.
I have a thermocouple with a MAX6675 chip rather than a thermistor.
In configuration.h it says:


// Temperature measurement
// Uncomment ONE of the next three
#define USE_THERMISTOR
//#define AD595_THERMOCOUPLE
//#define MAX6675_THERMOCOUPLE

If I change this to the following (which I'm guessing I need for my thermocouple):

// Temperature measurement
// Uncomment ONE of the next three
//#define USE_THERMISTOR
//#define AD595_THERMOCOUPLE
#define MAX6675_THERMOCOUPLE

I get an error when compiling:
error: 'NUMTEMPS' was not declared in this scope In member function 'void PIDcontrol::pidCalculation(int)':

Am I doing something wrong?

Are you in the us? If so shoot me a pm with your # and ill try to walk you through it.

Thanks for the generous offer, but I'm in Australia. Is there any chance for you to give some pointers on the forum?

I will try to get something to you tonight... what pin will you use for the thermocouple?

Try this...

thermocouple pin is pin 6 and the bed thermo is 7 if you have one...
I am unable to test as I have the AD595 ver... I am no expert.......but it should work (mine does)

If it does not lmk the problem and I'll play with it....
I used to code years back but now just direct a group of MUCH smarter people....heheh

Thanks DanielG with your suggestions and a bit of reverse engineering of the code I had based on the January firmware, I was able to get it working.

Should these sorts of changes be contributed back for inclusion in the main-line? It seems wrong to me that following the "instructions" in configuration.h results in a firmware that doesn't compile.

Quote

Should these sorts of changes be contributed back for inclusion in the main-line?

Yes, please.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

how does one go about contributing? do you post diffs somewhere? Upload a tarball somewhere?

Good question.

Probably the best idea is to send a diff to the reprap-dev mailing list, along with the question on how the "official" way goes. There's a Subversion issue tracker on Sourceforge, but that one is pretty much unused AFAIK.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

I´m also having some troubles with the extruder firmware and a Thermocouple.
Greg, can you plz post your changes somewhere.

thx

Chris

I have added my current firmware (based on the 0806 official version) to this page:

[reprap.org]