hi704 sensor

[Apache02]

I'm sure that 2 of my cameras use uses sensor HYNIX hi704 (i've test 2 sensors on one camera - both works). Current source code don't have hi704 support. As I see the only thing required is i2c initialization. So i tried to monitor i2c pins connected to camera using https://github.com/jjsch-dev/pico_i2c_sniffer . I tried this couple times and result always the same:

https://gist.github.com/Apache02/089760cbc51f2c4add65b92265d07e27#file-hi704_i2c_dump-txt

i2c address multiplied by 2 in this log.

hi704 i2c address is 0x30

init_table: https://gist.github.com/Apache02/089760cbc51f2c4add65b92265d07e27#file-camera_intf-h

I tried to use it, but according to sniffer somthing broken with i2c1 driver.

[Apache02]

The table is very similar to https://github.com/namko/UTV210-Kernel-2.6.35.7/blob/17c592360fdf72a18cf875fc4d62a8c02c392983/drivers/media/video/hi704.h#L37

[Apache02]

I have 2 boards:

• A9_B / V1.3_220516 (apk V720)
• HB6_V1.0DD211125 (apk 365cam) ( https://community-assets.home-assistant.io/original/4X/6/5/e/65e10e2fbace42e1b80d4e58664fc2b82c8de64d.jpeg )

I draw a pinout of HI704 connector from V720, it uses i2c1 from bk7252.
I made a dump of app section from 365cam, according to logs it connected to i2c2. So i found a place in firmware where camera inited, found calling to i2c2 device, change it to i2c1, applied encrypt_crc to modified dump and flash it to V720. Logs to uart2 is not working, but dump i have dump from i2c1.

Dump: https://gist.github.com/Apache02/089760cbc51f2c4add65b92265d07e27#file-hi704_i2c_dump_experiment-txt

[Alvid81]

https://wiki.bekencorp.com/pages/viewpage.action?pageId=23692262 Maybe this can help you. Also, if you havent logs at uart2 - i2c2 is working...

[Alvid81]

https://github.com/bekencorp/armino/blob/main/include/driver/dvp_camera.h
look here..

[Apache02]

@Alvid81 thx for bekencorp/armino. Implementation of cameras looks useful.
list of supported cameras:

const dvp_sensor_config_t *dvp_sensor_configs[] =
{
	&dvp_sensor_gc0328c,
	&dvp_sensor_hm1055,
	&dvp_sensor_gc2145,
	&dvp_sensor_ov2640,
	&dvp_sensor_gc0308,
	&dvp_sensor_SC101,
};

I can't open https://wiki.bekencorp.com/pages/viewpage.action?pageId=23692262 . Chinese server blocks my ip and vpn's ip.

[Alvid81]

Me too, maybe some tech issues.

[Alvid81]

BK7256 looks seems to BK7252, but bk7252 is ARM and BK7256 is RISC-V.. although the principles are general to both.

[Alvid81]

https://docs.bekencorp.com/arminodoc/bk_avdk/bk7256/en/v2.0.1/api-reference/multi_media/bk_dvp_camera.html

[Alvid81]

https://github.com/bekencorp/armino/blob/6fd9f73a06b098e5a562b95875aac1b96b879c70/tools/env_tools/video_tool/readme.txt