i2c fo romap5912 help!

i2c fo romap5912 help!

[李玮]

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Hi,
    I am using an osk5912 and would like to light the led D3 
on the board thru  the i2c driver.Now I have seen the dev file
under the /dev and can open the file /dev/i2c,but when i use ioctl
to set i2c, it says that Device or resoure busy.Please help me!
thanks!
my test program is fellowed.

#define I2C_SLAVE     0x0703

int main(void)
{
 int file;
 int
 int adapter_nr=0;
 int addr = 0x48;
 char filename[20] = {0};
 sprintf(filename,"/dev/i2c-%d",adapter_nr); 
 if ((file = open("/dev/i2c/0",O_RDWR)) < 0);
 {
     perror("err");
     exit(1);
 }
 if(ioctl(file,I2C_SLAVE,addr) < 0 )
 {
      perror("err");
//    exit(1);
  }
  
   int reg = 0x10;
   char buf[10]={0};
   buf[0] = reg;
   buf[1] = 0x43;
   buf[2] = 0x65;
  abc = write(file,buf,3);
  printf("the abc is %d\n",abc);
  close(file);
   return 0;
}







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