关于GPL329A中获取摄像头sensor id的问题

首先我拿到了sensor_id应用程序的源码，我要在上面添加获取ov2685 的 sensor id的代码.

利用find . -name  get_sensor_id找到该代码编译之后生成的a.out文件，这个a.out文件也就是get_sensor_id，它的代码如下:

./project/gplus/sampleCode/rootfs/sbin/get_sensor_id(这个是find命令找到这个a.out的路径)

从这段代码看，我们需要有ov2685的驱动作为参考，知道这个sensor的I2C的地址，然后其余的步骤配置就和其它的sensor是一样的啦!

//yangyx -------> 2016.4.20
				case 6 : //ov2685 sensor
				{
					DEBUG("ov2685\n");

 					attr.slaveAddr = 0x78;  //ov2685 sensor ID
  					attr.clkRate = 0x64;    //不用改

					system("devmem 0x93007084 32 0");//scuaCsiClkCfg 不用改
					usleep(1000);

					if(IO_Write_Value(0, reset_pin, 0) != STATUS_OK) //set_sensor_reset
							perror("error set_sensor_reset\n");
					usleep(1000);

					if(IO_Write_Value(0, 12, 0) != STATUS_OK) //set_sensor_power
						perror("error set_sensor_power\n");
					usleep(10000);

					//power on
					if(IO_Write_Value(0, 12, 1) != STATUS_OK) //set_sensor_power
						perror("error set_sensor_power\n");
					usleep(10000);

					if(IO_Write_Value(0, 30, 0) != STATUS_OK) //set_sensor_standby
						perror("error set_sensor_standby\n");

					system("devmem 0x9300703c 32 0x04003004");//scuaUsbPhyCfg
					system("devmem 0x93007084 32 0");//scuaCsiClkCfg
					system("devmem 0x93007084 32 0x00010103");//scuaCsiClkCfg
					usleep(2000);
					//-------------------------------------------------

					if(IO_Write_Value(0, reset_pin, 1) != STATUS_OK) //set_sensor_reset
							perror("error set_sensor_reset\n");
					usleep(20000);

					//不用改
  					ret = ioctl(fd, I2C_BUS_ATTR_SET, &attr);
  					if(ret < 0)
					{
							perror("ioctl set i2c arg\n");
						continue;
  					}
					//-------------------------------------------

					sensor_info.write_data[0] = 0x30;
					sensor_info.write_data[1] = 0x0a;
					sensor_info.write_size = 2;
					sensor_info.read_size = 2;
					ret = ioctl(fd, I2C_BUS_WRITE_READ, &sensor_info);
  					if(ret < 0)
					{
						perror("ioctl set i2c arg\n");
						continue;
  					}
					readdevice = (sensor_info.read_data[0] << 8) + sensor_info.read_data[1];

					if( readdevice == 0x2656)
					{
						DEBUG("I2C_BUS_WRITE_READ data = 0x%02x\n", readdevice);
						i = MAX_DEVICE + 1;
						deviceno = 2;
					}
					else
					{
						printf("Error I2C_BUS_WRITE_READ data = 0x%02x\n", readdevice);
					}

					break;

				}