OpenECU Developer Platform C-API, including a library and all of the software environment to develop C applications, to be built and run on OpenECU Hardware. Our C-API enables you to access all the functionality of the ECU. It also enables you to integrate your own existing code. Available for all 32-bit OpenECUs.

• Program your application in C
• Integrate your legacy code
• Define your scheduling on our RTOS
• Generate strategy and calibration files with one command.
• Execute and tune

All interactions with the ECU are performed using a simple API in C. Such interactions include:

• Reading inputs:
  • analog
  • digital
  • frequency
  • PWM
  • inertial sensors
• Setting outputs:
  • digital
  • PWM
  • analog
  • complex drivers (peak and hold, saturating, constant current, etc.)
  • Send and recieve messages over CAN
  • store or retrieve data from non-volatile memory

All memory management, and real-time task scheduling is handled by the OpenECU operating system.

Interactions with with the OpenECU developer platform are shown in the following examples.

H-bridge output example:

/* Drive the hbridge. */
 a30_a1_rc = pdx_hbridge_output(PIO_HBOT_A30_A1,
 mbec_hbridge_mode,
 mbec_hbridge_freq_A30_A1,
 mbec_hbridge_dc_A30_A1,
 &hbridge_last_mode,
 FALSE);

Analog input example:

S16 raw_adc;

/* Read the raw state of the analog input channel. Ignore the
 * return code.
 */
 (void) pax_adc_input(PIO_AIN_A19, &raw_adc, FALSE);

/* store the analog input to the control software variable */
 mbe_ai_a19 = raw_adc * ADC_COUNTS_TO_VOLTS;

Much like low-level drivers, controls engineers would be better served by not having to worry about legislated diagnostic services. The OpenECU optional OBD feature provides a turn-key solution for legislated OBD fault management and service tool communication. Using simple APIs, the OpenECU OBD library handles faults, in-use performance ratios, parameter and test reporting, routine control, and many other features of the OBD standards, including standard communication protocols.

OBD example:

/* Set the DTC as active */
 pdtc_update_iso_dtc(&dtc_a_j1939_1234_iso_x1234, PDTC_STATE_ACTIVE);

/* Update the engine RPM PID */
 ppid_update_pid(pid_engine_rpm_hdl, (U8*) &stp_eng_rpm_meas_integer);

/* Update counters */

/* Warm-up TRUE */
 pdtc_plat_obd_update_wup_count(TRUE);
 / Update denominator
 ppr_update_gen_denominator(TRUE);

/* Determine if a $31 diagnostic routine has been requested */
 rc = pdg_get_routine_rqst(pdg_routine1_hdl, &routine_rqst, options);