hpi_test.c

ARM2410与DSP5416 HPI通信测试程序

/***************************************************************************
                      HPI Drivers
                             ---------------------------------
    begin                : March 10th,2008
    copyright            : wangpingan
    email                : [e-mail]
    QQ                   : 276708824
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
 
 
 
 
 /**********************main******************************/
 int main()
  {  
    int fd,nread;
    char read_buf[2048];
     //open HPI
   if((fd=open("/dev/hpi",O_RDWR))<=0)
            {
     printf("Could not open hpi device!\n");
     return -1;
            }
    else
            { 
      printf("HPI device open ok!\n");
     
            }
     //read HPI
   if ((nread=read(fd,read_buf,2048))<0)
               {
     printf("Could not read hpi device!\n");
     return -1;
            }
    else
            { 
      printf("HPI device read success!\n");
      printf("read is %s\n",read_buf);
            }
     //close HPI
     close(fd);
     return 0;
    }