OBD2-car-display/due_obd2/obd2_elm327.cpp

#include <string.h>


#include "obd2_elm327.h"

ELM327 elm327_obj;

char bt_states[3][BT_STATE_LENGTH] = {"Initializing", "Connecting  ", "Connected   "};

char obd2_elm327_init(obd2_elm327_t *elm327)
{

    ELM327_SERIAL.begin(ELM327_BAUD);
    
    elm327->bt_state = BT_INITIALISING;
    elm327->elm327 = &elm327_obj;

    if (!elm327_obj.begin(ELM327_SERIAL, false, 5000))
    {
      return 0;
    }
    return 1;
}

void obd2_elm327_get_state(obd2_elm327_t *elm327, char *state)
{
    strcpy(state, bt_states[elm327->bt_state]);
}

void obd2_elm327_process(obd2_elm327_t *elm327)
{
    if (elm327->bt_state != BT_CONNECTED)
    {
        __UINT32_TYPE__ bt_state = digitalRead(BT_STATE_PIN);

        if (bt_state != elm327->bt_state)
        {
            if (bt_state)
            {
                elm327->bt_state = BT_CONNECTED;
            }
            else
            {
                elm327->bt_state = BT_INITIALISING;
            }
            elm327->on_state_change();
        }
    }

    /* TODO read from Serial2 to read OBD2 data */
}