OBD2-car-display/due_obd2/obd2_bt.c

#include <string.h>

#include "obd2_bt.h"

void obd2_bt_init(obd2_bt_t *bt)
{
    bt->state = BT_INITIALISING;
}

void obd2_bt_get_state(obd2_bt_t *bt, 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 (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_bt_process(obd2_bt_t *bt)
{
    __UINT32_TYPE__ bt_state = digitalRead(BT_STATE_PIN);
    if (bt_state)
    {
        bt->state = BT_CONNECTED;
    }
    else
    {
        bt->state = BT_INITIALISING;
    }
    bt->on_state_change();
}