test.c

来自「基于linux嵌入式系统的flash驱动以及测试程序和Makefile文件」· C语言 代码 · 共 70 行

#include <sys/ioctl.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>

#define DEVICE_AAA "/dev/flash"



int main()
{
  int ret;
 int fd;
 char buf[20];
 char c[4];
 int fileno;     //The No. of the file being accessed,
 /*******************************************
 The file No. assignment:
0~14 Chen Dahong
15~18  Zhoutong
19~29 Li Yangchun
 *********************************************/
   unsigned long para;   //This parament has no use


 c[0]=c[1]=c[2]=c[3]=0xff;

 fd=open("/dev/flash",O_RDWR);

 printf("fd=%d\n",fd);


 ioctl(fd,30,&para);  //before access file in flash, input the number
 
 ret=write(fd,"UPDATEFIRMWARE",14);
 // printf("ret=%d\n",ret);
 write(fd,c,4);
 // printf("ret=%d\n",ret);
 return 0;

 for(;;){
   int r; 
r=read(fd,buf,5);
 for(ret=0;ret<r;ret++)printf( "%x ",buf[ret]);
 printf("  r=  %d\n",r);

 if(r<5)break;

 }
return 0;

}