i2c with DM368

if you want to write a kernel drive for your sensor, you can refer to mt9p031 driver on how to access the sensor through i2c.

You can also write user space code to access i2c device. for example, writing to a i2c device:

int i2c_write(unsigned char addr, unsigned char* buffer, int len){

   int result,fd;
   struct i2c_msg msg[1] = {
        { .addr = addr, .flags = 0, .buf = buffer, .len = len },
   };

   struct i2c_rdwr_ioctl_data ioctl_data = {
          .msgs = msg, .nmsgs = 0x01            
   };
 
   if(len<=0) return -1;
   fd=open("/dev/i2c-1",O_RDWR);
   if(fd<0){
      fprintf(stderr,"I2C: Failed to open device.\r\n"); 
      return -1;
   }
   result=ioctl(fd,I2C_RDWR,&ioctl_data);
   if(result<0){
      fprintf(stderr," I2C Write Failed: %s, addr=0x%02x cmd=0x%02x, write_len=%d\r\n",
          strerror( errno ), addr,buffer[0],len);
   }
   close(fd);
   return result;
}