[Elphel-support] Script for changing the SADDR bit for the MT9P031 sensor

[Oleg]

Hi,

1.
I made change so it could be set int device tree (0x48) - just noticed a
bug and had to fix it:

>  ...

    elphel393_sensor_i2c: elphel393-sensor-i2c at 0 {
>                 compatible = "elphel,elphel393-sensor-i2c-1.00";
>                 /* Add known devices: name, slave address (7-bit), number
> of address bytes, number of data bytes, SCL frequency (kHz) */
>                 elphel393-sensor-i2c,i2c_devices = "mt9f002        0x10 2
> 2 500",
>                                                    "mt9p006        *0x48*
> 1 2 500",
>                                                    "el10359        0x08 1
> 2 500",
>                                                    "el10359_32     0x08 1
> 4 500",
>                                                    "pca9500_eeprom 0x50 1
> 1 100",
>                                                    "sensor_eeprom  0x50 1
> 1 100",
>                                                    "sensor_temp    0x18 1
> 2 100",
>                                                    "cy22393        0x69 1
> 1 100";
>     } ;

...


Commands to recompile devicetree:
decompile:

> $ dtc -I dtb -O dts devicetree.dtb -o devicetree.dts

compile:

> $ dtc -I dts -O dtb devicetree.dts -o devicetree.dtb



2. Are you able to build the firmware or should I upload it to somewhere?


3. Before any updating - can you read sensor's registers?

> ~$ ssh root at 192.168.0.9
> root at elphel393:~# cd /usr/local/verilog/
> root at elphel393:~# test_mcntrl.py @hargs-after
> x393 --> r
> x393 --> print_sensor_i2c (without args it will print usage)
>
> *...*
> *print_sensor_i2c <num_sensor> <reg_addr> <indx> <sa7> <verbose>*
> *...*x393 --> print_sensor_i2c 0 0x3000 0xff *0x10* 0
> *   Result: 0x2e01*


<num_sensor> - 10393's port the sensor is connected to. Can be: 0..3
<reg_addr> - I tried on a sensor that has 16-bit addresses (0x3000), for
MT9P006 it can be 0x0 (ID register addr)
*<indx> *- set 0xff
*<sa7> -* SADDR


4. Side note (sensor power and clock):
At boot autocampars.php calls: test_mcntrl.py @hargs

test_mcntrl.py (located at /usr/local/bin/)
hargs (located at /usr/local/verilog/)

Inside hargs file there are commands for:
- which bitstream to load
- setting sensor power: for MT9P006 it's PAR12 which translates to
{"mv":2800, "freq":24.0,"iface":"2V5_LVDS"}
- setting sensor clock frequency: for MT9P006 it's 24.0 "2V5_LVDS"

Best regards,
Oleg Dzhimiev
Electronics Engineer
phone: +1 801 783 5555 x124
Elphel, Inc.
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