Multichannel (#134)

* Multichannel AFR

* heater: fixes for multi channel mode

* f1_dual: fix configuration names

* pump_dac: fixes for multi-channel mode

* pwm: fixes for multichannel mode

* pump_control: reference instead of pointer

* sampling: reference instead of pointer

* heater_control: reference instead of pointer

* sampling: comment about heater/battery voltage

* f0_module: fixes for multi-channel update

* f1_rev2: fix for multichannel AFR

* hello rev 3

Co-authored-by: rusefillc <sdfsdfqsf2334234234>

firmware/lambda_conversion.cpp

@@ -22,9 +22,9 @@ static float GetPhi(float pumpCurrent)
     return gain * pumpCurrent + 0.99559f;
 }
 
-float GetLambda()
+float GetLambda(int ch)
 {
-    float pumpCurrent = GetPumpNominalCurrent();
+    float pumpCurrent = GetPumpNominalCurrent(ch);
 
     // Lambda is reciprocal of phi
     return 1 / GetPhi(pumpCurrent);