j1939_utils.h

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#ifndef INCLUDE_JBUS_J1939_UTILS_H_
#define INCLUDE_JBUS_J1939_UTILS_H_

#include <math.h>
#include <stdio.h>
#include "utils/common.h"   /* BYTE */


/* Parameter group numbers for supported messages (pdu_format, pdu_specific) */

#define PDU     0x00ff  
#define TSC1    0x0000  
#define EXAC    0x000b  
#define RQST    0xea00  
#define ERC1    0xf000  
#define EBC1    0xf001  
#define ETC1    0xf002  
#define EEC2    0xf003  
#define EEC1    0xf004  
#define ETC2    0xf005  
#define GFI2    0xfe81  
#define EI      0xfe92  
#define FD      0xfebd  
#define EBC2    0xfebf  
#define HRVD    0xfec1  
#define TURBO   0xfedd  
#define EEC3    0xfedf  
#define VD      0xfee0  
#define RCFG    0xfee1  
#define TCFG    0xfee2  
#define ECFG    0xfee3  
#define ETEMP   0xfeee  
#define PTO     0xfef0  
#define CCVS    0xfef1  
#define LFE     0xfef2  
#define AMBC    0xfef5  
#define IEC     0xfef6  
#define VEP     0xfef7  
#define TF      0xfef8  
#define RF      0xfefb  
/* Return values when retrieving and processing J1939 messages. */

#define J1939_RECEIVE_FATAL_ERROR   -1  
#define J1939_RECEIVE_MESSAGE_ERROR  0  
#define J1939_RECEIVE_MESSAGE_VALID  1  
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */


/* General purpose macros for extracting fields.
 *
 * Bit number in these macros for bytes follows convention in J1939 docs.
 */

/* Macros for short (two bit) values */
#define BITS87(x)       (((x) & 0xc0) >> 6)     
#define BITS65(x)       (((x) & 0x30) >> 4)     
#define BITS43(x)       (((x) & 0x0c) >> 2)     
#define BITS21(x)       ((x) & 0x03)            
#define HINIBBLE(x)     (((x) & 0xf0) >> 4)     
#define LONIBBLE(x)     ((x) & 0x0f)            
/* Macros for short (two byte) values */
#define HIBYTE(x)       (((x) & 0xff00) >> 8)               
#define LOBYTE(x)       ((x) & 0xff)                        
#define TWOBYTES(x, y)  ((((x) & 0xff) << 8) | (y & 0xff))  
/* Macros for int (four byte) values */
#define BYTE0(x)        (((x) & 0xff))              
#define BYTE1(x)        (((x) & 0xff00) >> 8)       
#define BYTE2(x)        (((x) & 0xff0000) >> 16)    
#define BYTE3(x)        (((x) & 0xff000000) >> 24)  
#define FOURBYTES(a3, a2, a1, a0)   \
            (((a3) & 0xff) << 24) | \
            (((a2) & 0xff) << 16) | \
            (((a1) & 0xff) << 8)  | \
            ((a0) & 0xff)                           
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */


extern float percent_0_to_100(int data);


extern float percent_0_to_250(int data);


extern float percent_m125_to_p125(int data);


int gear_m125_to_p125(int data);


extern float gear_ratio(int data);


extern float pressure_0_to_4000kpa(int data);


extern float pressure_0_to_1000kpa(int data);


extern float pressure_0_to_500kpa(int data);


extern float pressure_0_to_125kpa(int data);


extern float pressure_0_to_12kpa(int data);


extern float pressure_m250_to_p252kpa(int data);


extern float rotor_speed_in_rpm(unsigned short data);


extern float distance_in_km(unsigned int data);


extern float hr_distance_in_km(unsigned int data);


extern float speed_in_rpm_1byte(int data);


extern float speed_in_rpm_2byte(int data);


extern float wheel_based_mps(int data);


extern float wheel_based_mps_relative(int data);


extern float cruise_control_set_meters_per_sec(int data);


extern float fuel_rate_cm3_per_sec(int data);


extern float fuel_economy_meters_per_cm3(int data);


extern float torque_in_nm(unsigned short data);


extern float time_0_to_25sec(BYTE data);


extern float gain_in_kp(int data);


extern float temp_m40_to_p210(int data);


extern float temp_m273_to_p1735(int data);


extern float current_m125_to_p125amp(int data);


extern float current_0_to_250amp(int data);


extern float voltage(int data);


extern float brake_demand(int data);


extern float mass_flow(int data);


extern float power_in_kw(int data);


#endif /* INCLUDE_JBUS_J1939_UTILS_H_ */