Project:Sanguinololu Thermocouple: Difference between revisions
From London Hackspace Wiki
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, 27 December 2012
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| As we are replacing an analogue thermistor with a thermocouple-to-digital device we will need to make changes to the code. | | As we are replacing an analogue thermistor with a thermocouple-to-digital device we will need to make changes to the code. |
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| | I am in the progress of adding the required code to a local branch of Sprinter which I shall then merge with the master branch. |
| More information can be found out specifically about the MAX31855KASA+ [http://www.maximintegrated.com/datasheet/index.mvp/id/7273 here]. The most important piece of information from this is the bit map of the 32bit data packet.
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| [[File:MAX31855 memory map.PNG]]
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| MAX31855 is somewhat backwards compatible with the MAX6675 however it is 32 bits instead of 16 bits. I shall test to see if this poses a problem.
| | I also hope to do the same thing to Marlin & TeaCup |
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| Have to take the "MAX6675_SS" lines from the RAMPS section of pins.h and transpose it to Sanguinololu section.
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| under <code>#define SDSS 31</code> write <code>#define MAX6675_SS 31"</code> in "pins.h".
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| Ensure to uncomment the line <code>//#define HEATER_USES_MAX6675</code> and comment out <code>#define HEATER_USES_THERMISTOR</code> in "Configuration.h".
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| That should work. But it will NEED to be double/triple/quadruple checked...
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| /Lines to change in Sprinter/Marlin/etc... /
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| == Licence == | | == Licence == |
