115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
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* @file CJ125.h
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*
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* @date: Jul 17, 2016
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* @author Andrey Belomutskiy, (c) 2012-2018
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*/
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#ifndef HW_LAYER_SENSORS_CJ125_H_
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#define HW_LAYER_SENSORS_CJ125_H_
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// CJ125 SPI Registers
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#define IDENT_REG_RD 0x48 // Read Identity Register
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#define INIT_REG1_WR 0x56 // Write To Initialization Register 1
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#define INIT_REG2_WR 0x5A // Write To Initialization Register 2
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#define INIT_REG1_RD 0x6C // Read Initialization Register 1
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#define DIAG_REG_RD 0x78 // Read Diagnostics Register
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#define INIT_REG2_RD 0x7E // Read Initialization Register 2
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#define CJ125_INIT1_NORMAL_8 0x88 // 0b10001000 (Normal mode, Amplification 8)
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#define CJ125_INIT1_NORMAL_17 0x89 // 0b10001001 (Normal mode, Amplification 17)
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#define CJ125_INIT1_CALBRT 0x9D // 0b10011101 (Calibration mode, LA=1, RA=1)
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#define CJ125_INIT2_NORMAL 0x00 // 0b00000000, (Normal mode)
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#define CJ125_INIT2_DIAG 0x10 // 0b00010000, (Extended diagnostics mode, SET_DIA_Q=1)
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#define CJ125_INIT2_RESET 0x40 // 0b01000000, SRESET=1
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#define CJ125_DIAG_NORM 0xFF // no errors
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#define CJ125_IDENT 0x60
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#define CJ125_IDENT_MASK 0xF8
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#define CJ125_CALIBRATION_DELAY 1000 // 1 sec
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#define CJ125_TICK_DELAY 20 // 20 ms
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#define CJ125_IDLE_TICK_DELAY 1000 // 1 sec
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// Heater params for Idle(cold), Preheating and Control stages
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// See http://www.waltech.com/wideband-files/boschsensordatasheet.htm
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#define CJ125_HEATER_IDLE_RATE 0.15f // for a very cold sensor (presumably), we allow 15% duty max.
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#define CJ125_HEATER_PREHEAT_PERIOD 300 // 300 ms
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#define CJ125_HEATER_CONTROL_PERIOD 180 // 180 ms
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#define CJ125_HEATER_OVERHEAT_PERIOD 500 // 500 ms
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#define CJ125_HEATER_PWM_FREQ 100 // 100 Hz
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#define CJ125_HEATER_PREHEAT_RATE (0.4f/14.0f) // Assuming that dutycycle=1.0 equals to 14V, and max.allowed heater rate is 0.4V/sec
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#define CJ125_HEATER_LIMITING_VOLTAGE 12.0f // Do not allow more than 90% heating for high battery voltage (>12V).
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#define CJ125_HEATER_LIMITING_RATE 0.92f // This prevents sensor overheating.
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#define CJ125_CALIBRATE_NUM_SAMPLES 10
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#define CJ125_UR_PREHEAT_THR 2.0f // Ur > 2.0 Volts is too cold to control with PID
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#define CJ125_UR_OVERHEAT_THR 0.5f // Ur < 0.5 Volts is overheat
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#define CJ125_UR_GOOD_THR 1.4f
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#define CJ125_UACAL_MIN 1.0f // Calibration UA values range
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#define CJ125_UACAL_MAX 2.0f
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#define CJ125_HEATER_MIN_DUTY 0.1f
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#define CJ125_PREHEAT_MIN_DUTY 0.9f
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//#define CJ125_PREHEAT_TIMEOUT 90 // 90 secs
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#define CJ125_PREHEAT_TIMEOUT 300
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#define CJ125_VOLTAGE_TO_16BIT_FACTOR 4096.0f
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#define CJ125_PUMP_SHUNT_RESISTOR 61.9f
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#define CJ125_STOICH_RATIO 14.7f
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#define CJ125_PUMP_CURRENT_FACTOR 1000.0f
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// Some experimental magic values for heater PID regulator
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#define CJ125_PID_LSU42_P (80.0f / 16.0f * 5.0f / 1024.0f)
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#define CJ125_PID_LSU42_I (25.0f / 16.0f * 5.0f / 1024.0f)
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// Returned if there's no valid measurement
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#define CJ125_AFR_NAN 0.0f
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typedef enum {
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CJ125_IDLE,
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CJ125_INIT,
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CJ125_CALIBRATION,
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CJ125_PREHEAT,
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CJ125_HEAT_UP,
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CJ125_READY,
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CJ125_OVERHEAT,
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CJ125_ERROR,
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} cj125_state_e;
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typedef enum {
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CJ125_ERROR_NONE,
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CJ125_ERROR_HEATER_MALFUNCTION,
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CJ125_ERROR_OVERHEAT,
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} cj125_error_e;
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typedef enum {
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CJ125_MODE_NONE,
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CJ125_MODE_NORMAL_8,
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CJ125_MODE_NORMAL_17,
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CJ125_MODE_CALIBRATION,
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} cj125_mode_e;
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typedef enum {
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CJ125_LSU_42 = 0,
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CJ125_LSU_49 = 1,
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} cj125_sensor_type_e;
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void initCJ125(Logging *shared);
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void cjPostState(TunerStudioOutputChannels *tsOutputChannels);
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float cjGetAfr(DECLARE_ENGINE_PARAMETER_SIGNATURE);
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bool cjHasAfrSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE);
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#endif /* HW_LAYER_SENSORS_CJ125_H_ */
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