摄像头ov2685中关于sensor id 设置的相关的寄存器地址【转】
本文转载自:http://blog.csdn.net/morixinguan/article/details/51220992
OV2685 :
CHIP_ID
address : 0x300A default : 0x26
address : 0x300B default : 0x85
address : 0x300C defailt : 0x00
回到早上的话题,如果我想查看摄像头的ID,我的代码可以这么写,在GPL329A-sensor-ID设置那里有完整的代码,这里我只给出小部分:
- 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)
- {
- <span style="white-space:pre"> </span>perror("ioctl set i2c arg\n");
- continue;
- }
- readdevice = (sensor_info.read_data[0] << 8) + sensor_info.read_data[1];
- // if( readdevice == 0x2656)
- if(readdevice == 0x2685)
- {
- DEBUG("I2C_BUS_WRITE_READ data = 0x%02x\n", readdevice);
- i = MAX_DEVICE + 1;
- <span style="white-space:pre"> </span>deviceno = 2;
- }
- else
- {
- printf("Error I2C_BUS_WRITE_READ data = 0x%02x\n", readdevice);
- }
从代码上看:
- sensor_info.write_data[0] = 0x30;
- sensor_info.write_data[1] = 0x0a;
这个结构体数组的含义就是为了存储这两个寄存器的值,然后后面通过I2C总线去读取地址所对应的值,如果读出来的值为0x2685,这就说明设备已经被驱动了,同时也读出了相应的ID号。