ma_tmr.c

avr Rtos 255 Task avr Rtos 255 Task

**      Starts the selected timer channel. Optionally, the timer counter
**      can be cleared before the timer is started.
**
**  Parameters:
**      Channel     The timer channel to start (0-3)
**      Reset       0 = Do not reset timer before start
**                  1 = Reset timer value before start
**
**  Returns:
**      MA_ERROR    If illegal channel number was given
**      MA_OK       Otherwise
**
**---------------------------------------------------------------------------
*/
{
    /*--- Handle user code on function entry ---*/
   // ENTER_MA_START_TMR;

    /*--- Handle correct channel ---*/
    switch( Channel )
    {
    case 0:
        /*--- Reset timer first? ---*/
        if( Reset )
        {
            TCNT0 = 0;
        }

        /*--- Start channel 0 ---*/
        TCCR0 = MA_TCCR0_TMR;
        break;

    case 1:
        /*--- Reset timer first? ---*/
        if( Reset )
        {
            TCNT1 = 0;
        }

        /*--- Start channel 1 ---*/
        TCCR1B = MA_TCCR1B_TMR;
        break;

    case 2:
        /*--- Reset timer first? ---*/
        if( Reset )
        {
            TCNT2 = 0;
        }

        /*--- Start channel 2 ---*/
        TCCR2 = MA_TCCR2_TMR;
        break;

    case 3:
        /*--- Reset timer first? ---*/
        if( Reset )
        {
            TCNT3 = 0;
        }

        /*--- Start channel 3 ---*/
        TCCR3B = MA_TCCR3B_TMR;
        break;

    default:
        /*--- Handle user code on function exit ---*/
        //EXIT_MA_START_TMR;

        /*--- Illegal channel ---*/
        return MA_ERROR;
    }

    /*--- Handle user code on function exit ---*/
    //EXIT_MA_START_TMR;

    return MA_OK;

} /* MA_START_TMR */





S8 MA_Stop_TMR( U8 Channel )
/*
**---------------------------------------------------------------------------
**
**  Abstract:
**      Stops the selected timer channel.
**
**  Parameters:
**      Channel     The timer channel to stop (0-3)
**
**  Returns:
**      MA_ERROR    If illegal channel number was given
**      MA_OK       Otherwise
**
**---------------------------------------------------------------------------
*/
{
    /*--- Handle user code on function entry ---*/
    //ENTER_MA_STOP_TMR;

    /*--- Handle correct channel ---*/
    switch( Channel )
    {
    case 0:
        /*--- Stop channel 0 ---*/
        TCCR0 &= ~0x07;
        break;

    case 1:
        /*--- Stop channel 1 ---*/
        TCCR1B &= ~0x07;
        break;

    case 2:
        /*--- Stop channel 2 ---*/
        TCCR2 &= ~0x07;
        break;

    case 3:
        /*--- Stop channel 3 ---*/
        TCCR3B &= ~0x07;
        break;

    default:
        /*--- Handle user code on function exit ---*/
        //EXIT_MA_STOP_TMR;

        /*--- Illegal channel ---*/
        return MA_ERROR;
    }


    /*--- Handle user code on function exit ---*/
    //EXIT_MA_STOP_TMR;

    return MA_OK;

} /* MA_STOP_TMR */





S8 MA_SetCompareMatch_TMR( U8 Channel, U16 ValueA, U16 ValueB, U16 ValueC )
/*
**---------------------------------------------------------------------------
**
**  Abstract:
**      Sets new compare match values for selected channel. Please note that
**      only some channels have support for B and C values. For channels
**      with support for one compare match value only, use Value A.
*
**  Parameters:
**      Channel     The timer channel to change
**      ValueA      The new compare match value (A) (all channels)
**      ValueB      The new compare match value (B) (channels 1 and 3)
**      ValueC      The new compare match value (C) (channels 1 and 3)
**
**  Returns:
**      MA_ERROR    If illegal channel number was given
**      MA_OK       Otherwise
**
**---------------------------------------------------------------------------
*/

{
    /*--- Handle user code on function entry ---*/
    //ENTER_MA_SETCOMPAREMATCH_TMR;

    /*--- Handle correct channel ---*/
    switch( Channel )
    {
    case 0:
        /*--- Update channel 0 ---*/
        OCR0 = (U8)ValueA;
        break;

    case 1:
        /*--- Update channel 1 ---*/
        OCR1A = ValueA;
        OCR1B = ValueB;
        OCR1C = ValueC;
        break;

    case 2:
        /*--- Update channel 2 ---*/
        OCR2 = (U8)ValueA;
        break;

    case 3:
        /*--- Update channel 3 ---*/
        OCR3A = ValueA;
        OCR3B = ValueB;
        OCR3C = ValueC;
        break;

    default:
        /*--- Handle user code on function exit ---*/
        //EXIT_MA_SETCOMPAREMATCH_TMR;

        /*--- Illegal channel ---*/
        return MA_ERROR;
    }


    /*--- Handle user code on function exit ---*/
    //EXIT_MA_SETCOMPAREMATCH_TMR;

    return MA_OK;

} /* MA_SETCOMPAREMATCH_TMR */



extern int i;

#pragma vector=MA_TIMER0_OVF_vect
__interrupt void MA_IntHandler_OVF0_TMR( void )
 /*
**---------------------------------------------------------------------------
**
**  Abstract:
**      This function is the high level language interrupt handler for the
**      timer 0 overflow interrupt.
**
**  Parameters:
**      None
**
**  Returns:
**      None
**
**---------------------------------------------------------------------------
*/
{
    /*--- Handle user code on function entry ---*/
    //ENTER_MA_INTHANDLER_OVF0_TMR;

    /*--- Handle user code ---*/
    //INSIDE_MA_INTHANDLER_OVF0_TMR;

    /*--- Handle user code on function exit ---*/
    //EXIT_MA_INTHANDLER_OVF0_TMR;

  i++;


} /* MA_IntHandler_OVF0_TMR */





/*
**===========================================================================
**  5.      INTERNAL FUNCTIONS (declared in Section 3.5)
**===========================================================================
*/

/*
**===========================================================================
** END OF FILE
**===========================================================================
*/