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quartiq / thermostat-eem

Embedded software for the Thermostat-EEM multichannel temperature controller.
Apache License 2.0
7 stars 4 forks source link

More flexible ADC setups (mix of single-ended and differential ratiometric control, sequencing of those flexible setups) #52

Closed nkrackow closed 9 months ago

jordens commented 2 years ago

It would be really interesting to see the raw data for the single ended setup. For that with the current afe just change the ADC setup to 4 single ended channels everywhere (plus the impact on sequencing, data arrays, and timing), short the NTC and measure 5k ref vs the other 5k ref ratiometric.

jordens commented 2 years ago

Ah I see we have the data more or less in https://github.com/quartiq/thermostat-eem/issues/38#issuecomment-1127683289 with slightly different conditions. But that should not matter. Summary is that there is negligible benefit of the balanced measurement in this case. The next step would be A firmware version that only supports 16 single ended sensors (i.e. 5 wire measurement with 2 excitation, and 2 reference per adc plus one signal sense wire per sensor).

jordens commented 1 year ago

@nkrackow done now?

jordens commented 9 months ago

done