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# 1.cam概率上电异常,无法识别chip id;
# 2. 识别到之后,无法使用cam。
## 启动信息dmesg | grep ov5640
```
[ 3.371044] ov5640 0-003c: supply DOVDD not found, using dummy regulator
[ 3.377956] ov5640 0-003c: supply AVDD not found, using dummy regulator
[ 3.384620] ov5640 0-003c: supply DVDD not found, using dummy regulator
[ 3.439136] ov5640 0-003c: ov5640_read_reg: error: reg=300b
[ 3.444708] ov5640 0-003c: ov5640_check_chip_id: failed to read chip identifier
```
> D:\SDK\04_Sources\myir-renesas-linux\drivers\media\i2c\ov5640.c 驱动源码路径
- #define OV5640_REG_CHIP_ID 0x300a
- ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
- if (ret) {
- dev_err(&client->dev, "%s: failed to read chip identifier\n",
- __func__);
- goto power_off;
- }
复制代码 这里为什么会去读300b ???
## 概率性能启动时,使用 评估
反复重启多次,识别到cam之后按照
./v4l2-init.sh
weston-start
gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=640,height=480 ! waylandsink
抓拍时 错误:
抓拍错误信息
随后多次重启,各种奇怪的参数:
万分之一识别到摄像头之后 v4l2 开启摄像头捕获 还有这种错误:
VIDIOC_STREAMON returned -1 (Broken pipe)
求助各位分析以下。原厂技术支持处理一个多月了,邮件交流太困难了。
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