t_rdsa.c

dsp6713开发板的许多例程.对入门特别有用

/*************************************************************************
* FILENAME: $RCSfile: t_rdsa.c,v $
* VERSION : $Revision: 1.2 $
* DATE    : $Date: 2000/11/03 19:17:13 $
* Copyright (c) 1997-2000 Texas Instruments Incorporated
*
* Target Read (for SAFEARRAYS) Example:
*____________________________________________________________________
* - Read an array of 5 integers, 100 times, 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_wrtsa().
*************************************************************************/
#include <stdio.h>              /* fprintf(), puts()                    */
#include <stdlib.h>             /* abort()                              */
#include <rtdx.h>               /* RTDX                                 */
#include "target.h"             /* TARGET_INITIALIZE()                  */

#define MAX_MESSAGES 100
#define MAX_ELEMENTS 5

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

#ifdef HSRTDX
    // Silicon HSRTDX workaround...
    // - User must define extra 32bit word AFTER all Host-to-target receive
    //   buffers.
#ifdef _TMS320C6X
#pragma DATA_ALIGN(recvd,4)
int recvd[MAX_ELEMENTS+1];
#define RCVD_SIZE   (sizeof(recvd)-sizeof(recvd[0]))
#elif defined(__TMS320C55X__)
int recvd[MAX_ELEMENTS+3];
#pragma DATA_ALIGN(recvd,2)
#define RCVD_SIZE   (sizeof(recvd)-(2*sizeof(recvd[0])))
#else
#error "Unknown how to use Dummy word for this target."
#endif
#else
int recvd[MAX_ELEMENTS];
#define RCVD_SIZE   (sizeof(recvd))
#endif


void main()
{
    unsigned int i;
    
    /* Target Specific Initialization                                   */
    TARGET_INITIALIZE();
    
    /* Enable the channel, "ichan"                                      */
    RTDX_enableInput(&ichan);
    
    puts("Recieving data from the Host...");
    for ( i = 0; i < MAX_MESSAGES; i++ ) {
        if ( (RTDX_read( &ichan, recvd, RCVD_SIZE )) !=
            RCVD_SIZE ) {
            fprintf(stderr,
                "\nError: RTDX_read() failed\n");
            abort();
        }
    }
    
    /* Disable the channel, "ichan"                                     */
    RTDX_disableInput(&ichan);
    
    puts("\nProgram Completed!");
}