Marlin Reading MAX6675 Thermocouple Amplifier

Hello,
I am attempting to connect the MAX6675 thermocouple amplifier to my Ultimaker v1.5.7 3D printer PCB board. I believe that I have it connected properly but I am having issues getting the software to talk to it. From my understanding, all I should have to do is set TEMP_SENSOR_0 to -2 in the Marlin firmware. Unfortunately, no matter what version of Marlin I use, I get compiling errors. They read stuff like:

temperature.cpp:1011: error: 'DIOMAX6675_SS_WPORT' was not declared in this scope
temperature.cpp:1011: error: 'DIOMAX6675_SS_PIN' was not declared in this scope

Also the page that it opens and highlights when it gives this error looks like:

#ifdef HEATER_0_USES_MAX6675
#ifndef SDSUPPORT
SET_OUTPUT(MAX_SCK_PIN);
WRITE(MAX_SCK_PIN,0);

SET_OUTPUT(MAX_MOSI_PIN);
WRITE(MAX_MOSI_PIN,1);

SET_INPUT(MAX_MISO_PIN);
WRITE(MAX_MISO_PIN,1);
#endif

SET_OUTPUT(MAX6675_SS);
WRITE(MAX6675_SS,1);
#endif

The only other setting that I have changed in the file is #define MOTHERBOARD to 7. Based on the error, I believed that the pins for SPI interfacing weren't defined so I went to the pins.h file and the section that talks about the MAX6675 board looks fine:

#endif // MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 77

SPI for Max6675 Thermocouple

#ifndef SDSUPPORT
// these pins are defined in the SD library if building with SD support
#define MAX_SCK_PIN 52
#define MAX_MISO_PIN 50
#define MAX_MOSI_PIN 51
#define MAX6675_SS 53
#else
#define MAX6675_SS 49
#endif

#endif //MOTHERBOARD == 3 || MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 77

Any help is greatly appreciated! Thanks.

Isn't that section only compiled for motherboads 3,33,34,35 and 77? You'd need to define MAX6675_SS in the motherboard 7 pins.

Thanks for the help. I tried putting

#if MOTHERBOARD == 7
#define KNOWN_BOARD
#define MAX_SCK_PIN 52
#define MAX_MISO_PIN 50
#define MAX_MOSI_PIN 51
#define MAX6675_SS 53
#endif

this in the motherboard 7 place but I am still getting the same error. I think I have to edit the file in another way besides notepad because it is saving weird but arduino wont let me open pins.h. Any suggestions?

I use Notepad++. Or you can use CTRL+ALT+Right to get to the next tab in the arduino IDE, which will let you get to pins.h.

I have defined the pins in the right section and then I uploaded the sketch. My lcd is out and I think it is because I am use the SPI bus for the MAX chip so it shuts off. However, I cant read or give commands via my computer. Repeteir-Host just says 1 command waiting, 2 commands waiting... Does anyone know what is going on and how to at least run the printer from my computer?

did this issue get resolved and how did you fix it?