Line data    Source code

       1             : /**
       2             :  * @author Andrey Belomutskiy, (c) 2012-2020
       3             :  *
       4             :  * EGO Exhaust Gas Oxygen, also known as AFR Air/Fuel Ratio :)
       5             :  *
       6             :  * rusEfi has three options for wideband:
       7             :  * 1) integration with external widebands using liner analog signal wire
       8             :  * 2) 8-point interpolation curve to emulate a wide-band with a narrow-band sensor.
       9             :  * 3) CJ125 internal wideband controller is known to work with both 4.2 and 4.9
      10             :  *
      11             :  */
      12             : #include "pch.h"
      13             : 
      14             : #include "cyclic_buffer.h"
      15             : 
      16           0 : bool hasAfrSensor() {
      17           0 :         if (engineConfiguration->enableAemXSeries) {
      18           0 :                 return true;
      19             :         }
      20             : 
      21           0 :         return isAdcChannelValid(engineConfiguration->afr.hwChannel);
      22             : }
      23             : 
      24             : extern float InnovateLC2AFR;
      25             : 
      26           0 : float getAfr(SensorType type) {
      27           0 :         afr_sensor_s * sensor = &engineConfiguration->afr;
      28             : 
      29           0 :         if (!isAdcChannelValid(type == SensorType::Lambda1 ? engineConfiguration->afr.hwChannel : engineConfiguration->afr.hwChannel2)) {
      30           0 :                 return 0;
      31             :         }
      32             : 
      33           0 :         float volts = adcGetScaledVoltage("ego", type == SensorType::Lambda1 ? sensor->hwChannel : sensor->hwChannel2);
      34             : 
      35           0 :         return interpolateMsg("AFR", sensor->v1, sensor->value1, sensor->v2, sensor->value2, volts)
      36           0 :                         + engineConfiguration->egoValueShift;
      37             : }
      38             : 
      39             : // this method is only used for canned tunes now! User-facing selection is defined in tunerstudio.template.ini using settingSelector
      40         509 : static void initEgoSensor(afr_sensor_s *sensor, ego_sensor_e type) {
      41             : 
      42         509 :         switch (type) {
      43           0 :         case ES_BPSX_D1:
      44             :                 /**
      45             :                  * This decodes BPSX D1 Wideband Controller analog signal
      46             :                  */
      47           0 :                 sensor->v1 = 0;
      48           0 :                 sensor->value1 = 9;
      49           0 :                 sensor->v2 = 5;
      50           0 :                 sensor->value2 = 19;
      51           0 :                 break;
      52             : 
      53           6 :         case ES_Innovate_MTX_L:
      54           6 :                 sensor->v1 = 0;
      55           6 :                 sensor->value1 = 7.35;
      56           6 :                 sensor->v2 = 5;
      57           6 :                 sensor->value2 = 22.39;
      58           6 :                 break;
      59         500 :         case ES_14Point7_Free:
      60         500 :                 sensor->v1 = 0;
      61         500 :                 sensor->value1 = 9.996;
      62         500 :                 sensor->v2 = 5;
      63         500 :                 sensor->value2 = 19.992;
      64         500 :                 break;
      65             :                 // technically 14Point7 and PLX use the same scale
      66           3 :         case ES_PLX:
      67           3 :                 sensor->v1 = 0;
      68           3 :                 sensor->value1 = 10;
      69           3 :                 sensor->v2 = 5;
      70           3 :                 sensor->value2 = 20;
      71           3 :                 break;
      72           0 :         case ES_AEM:
      73           0 :                 sensor->v1 = 0.5;
      74           0 :                 sensor->value1 = 8.5;
      75           0 :                 sensor->v2 = 4.5;
      76           0 :                 sensor->value2 = 18;
      77           0 :                 break;
      78           0 :         default:
      79           0 :                 firmwareError(ObdCode::CUSTOM_EGO_TYPE, "Unexpected EGO %d", type);
      80           0 :                 break;
      81             :         }
      82         509 : }
      83             : 
      84         509 : void setEgoSensor(ego_sensor_e type) {
      85         509 :         engineConfiguration->afr_type = type;
      86         509 :         initEgoSensor(&engineConfiguration->afr, type);
      87         509 : }