t_read.c

dsp6713开发板的许多例程.对入门特别有用

/*********************************************************************
 * FILENAME: $RCSfile: t_read.c,v $
 * VERSION : $Revision: 1.2 $
 * DATE    : $Date: 2000/11/03 19:21:05 $
 * Copyright (c) 1997-2000 Texas Instruments Incorporated
 *
 * Target Read Example:
 *____________________________________________________________________
 * - Reads 100, one at a time via RTDX_read().
 * - Uses ONE input channel
 *
 * - This is the module to be run on the TARGET.
 * - This program is meant to be used with the RTDX Excel project's
 *   VBA module h_write().
 ********************************************************************/
#include <stdio.h>                     /* fprintf(), puts()         */
#include <stdlib.h>                    /* abort()                   */
#include <rtdx.h>                      /* RTDX                      */
#include "target.h"                    /* TARGET_INITIALIZE()       */

#define ITERATIONS      100

struct tagData {
    int  recvd;                 /* Data received                        */
#ifdef HSRTDX
    // Silicon HSRTDX workaround...
    // - User must define extra 32bit word AFTER all Host-to-target receive
    //   buffers & align on 32bit boundaries.
#ifdef _TMS320C6X
    unsigned dummy;
#elif defined(__TMS320C55X__)
    unsigned long dummy;
#else
#error "Unknown how to use Dummy word for this target."
#endif
#endif
} data;

/* Declare and initialize an input channel called "ichan"           */
RTDX_CreateInputChannel(ichan);

void main()
{
        unsigned int i;         /* loop counter                     */

        /* Target initialization for RTDX                           */
        TARGET_INITIALIZE();

        /* Enable the channel, "ichan"                              */
        RTDX_enableInput(&ichan);

        for ( i = 0; i < ITERATIONS; i++ ) {

                /* Request an integer from the host                 */
                if ( (RTDX_read( &ichan, &data.recvd, sizeof(data.recvd) )) !=
                    sizeof(data.recvd) ) {
                        fprintf(stderr,
                                "\nError: RTDX_read() failed\n");
                        abort();
                }
        }

        /* Disable the channel, "ichan"                             */
        RTDX_disableInput(&ichan);

        puts("\nProgram Completed!");
}