10393 manual

Defaults

IP addr: 192.168.0.8

user / pwd: root / <empty>

• The address is set in the init_elphel393.sh script on the card's FAT32 partition.

Boot

• on power-on boots from NAND flash: u-boot, device tree and kernel.

devicetree has "chosen = ...root=/dev/mmcblk0p2..." - rootfs is on the micro SD card second partition.

Command line access

ssh root@192.168.0.8

Serial console access

• Use microUSB-USB cable to connect to PC - the cable's end should be thin enough otherwise interferes with the micro SD card.

• Terminal: minicom -c on

(setup the device and speed - default settings might just work)

Get images

channel 1: http://192.168.0.8:2323/noexif/img

channel 2: http://192.168.0.8:2324/noexif/img

channel 3: http://192.168.0.8:2325/noexif/img

channel 4: http://192.168.0.8:2326/noexif/img

Change parameters

• http://192.168.0.8/controls.html - previews and basic parameters:
  • Exposure - the values are in the sensor lines.
  • WB - r,g,b gains
  • Quality - compression quality - individual for compressor but common for the buffer driver - it's better to have the same value for all channels.

• The defaults settings are define on the micro SD card, FAT32 partition - local/verilog/startup:

...
-c write_sensor_i2c  all 1 0 0x9009001e (exposure)
-c write_sensor_i2c  all 1 0 0x9035000a (set all gains to 0xa)
-c write_sensor_i2c  all 1 0 0x902c000e (blue gain to 0xe)
-c write_sensor_i2c  all 1 0 0x9009001d (red gain to 0xd)
...

Known problems

• Vertical artifacts in jpegs. Images are ok at 100% quality. Fixed, testing.
• http://192.168.0.8:232x/noexif/mimg - multipart jpeg displays corrupted frames from time to time. Network bandwidth.
• Sometimes on power-on (NAND flash boot) cannot mount the card's rootfs partition. Kernel Panics. Power off/on. Soft "reboot -f" works ok.
• Changing exposure/quality/gains - can corrupt images - needs testing.