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    // Set up callback for CAN reception, this is optional if only sending is required.
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    // Set up callback for CAN reception, this is optional if only sending is required.
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    BIOS_CanCallback = &can_receive;
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    BIOS_CanCallback = &can_receive;
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    // Send CAN_NMT_APP_START
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    // Send CAN_NMT_APP_START
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    BIOS_CanSend(&txMsg);
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    BIOS_CanSend(&txMsg);
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    Callerid_Init();
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    DTMFin_Init();
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    uint8_t rxbuffer[MAX_TONES];
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    uint8_t rxbuffer[MAX_TONES];
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    uint8_t state=0;
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    uint8_t state=0;
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    uint8_t rxlen=0;
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    uint8_t rxlen=0;
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    while (1) {
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    while (1) {
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        if (state == STATE_IDLE) {
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        if (state == STATE_IDLE) {
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            Callerid_Start(rxbuffer);
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            DTMFin_Start(rxbuffer);
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            state = STATE_START_WAIT;
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            state = STATE_START_WAIT;
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        } else if (state == STATE_START_WAIT) {
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        } else if (state == STATE_START_WAIT) {
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            state = STATE_WAIT;
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            state = STATE_WAIT;
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        } else if (state == STATE_WAIT) {
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        } else if (state == STATE_WAIT) {
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            uint8_t retval = Callerid_Poll(&rxlen);
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            uint8_t retval = DTMFin_Poll(&rxlen);
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            if (retval == RET_FINISHED) {
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            if (retval == RET_FINISHED) {
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                state = STATE_STOP;
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                state = STATE_STOP;
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            } else if (retval == RET_OVERFLOW) {
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            } else if (retval == RET_OVERFLOW) {
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                state = STATE_IDLE;
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                state = STATE_IDLE;
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            }
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            }