OBD2-car-display/due_obd2/obd2_elm327.cpp

#include <string.h>
#include "ELMduino.h"

#include "obd2_elm327.h"

ELM327 myELM327;

void obd2_elm327_init(obd2_elm327_t *elm327)
{
    elm327->bt_state = BT_INITIALISING;
}

void obd2_elm327_get_state(obd2_elm327_t *elm327, char *state)
{
    // char bt_states[3][13] = {"Initializing", "Connecting  ", "Connected   "};
    // char bt_states;
    // (void) bt_states;

    if (sizeof(state) != BT_STATE_LENGTH)
    {
        /* result string must be of size 13 */
        return;
    }
    switch (elm327->bt_state)
    {
    case BT_INITIALISING:
        strcpy(state, "Initializing");
        break;
    case BT_CONNECTING:
        strcpy(state, "Connecting  ");
        break;
    case BT_CONNECTED:
        strcpy(state, "Connected   ");
        break;
    default:
        strcpy(state, "Unknown     ");
        break;
    }
}

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 */
}