tpu_dio_example2.c

mpc564 时钟中断 时钟中断

/**************************************************************************/
/* FILE NAME: tpu_dio_example2.c              COPYRIGHT (c) MOTOROLA 2002 */
/* VERSION: 1.0                                   All Rights Reserved     */
/*                                                                        */
/* DESCRIPTION: This sample program shows a simple example of a program   */
/* that uses the DIO API to record the pin state on every transition.     */
/* The program is targeted for the MPC555 but should work on any MPC500   */
/* device with a TPU. For other devices the setup routines will also need */
/* to be changed.                                                         */
/*========================================================================*/
/* HISTORY           ORIGINAL AUTHOR: Jeff Loeliger                       */
/* REV      AUTHOR      DATE       DESCRIPTION OF CHANGE                  */
/* ---   -----------  ---------    ---------------------                  */
/* 1.0   J. Loeliger  30/Aug/02    Initial version of function.           */
/**************************************************************************/

#include "mpc555.h"     /* Define all of the MPC555 registers, this needs to */
                        /* changed if other MPC500 devices are used.         */
#include "mpc500.c"     /* Configuration routines for MPC555 EVB, will need */
                        /* to be changed if other hardware is used.         */
#include "mpc500_util.h"    /* Utility routines for using MPC500 devices */
#include "tpu_dio.h"    /* TPU DIO functions */

UINT16 pin;     /* current pin state in MSB */

void main ()
{
     struct TPU3_tag *tpua = &TPU_A;   /* pointer for TPU routines */
    
     setup_mpc500(40);       /*Setup device and programm PLL to 40MHz*/	

    /* Initialize channel:                          */
    /*    -Use channel 5                            */
    /*    -Update on both edges                     */
    /*    -Schedule as high priority in the TPU     */
    tpu_dio_init_input_trans(tpua, 5, TPU_PRIORITY_HIGH, TPU_DIO_BOTH_EDGES);
    
    /* get current pin state */
    /* when using both edges the pin value should be $5555 or $AAAA */
    while (1){
        pin = tpu_dio_pin_history(tpua, 5);
    }
}

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