setting ISS driver sensor registers from A8 - IPNC_RDK 3.8 DM8127

I will notify the IPNC RDK team for help.

BR
Pavel

Hi,

You can perform i2c communication from the U-boot command line using the following commands on the UART console:

>i2c dev 2  => to select the i2c bus 2

>i2c write <slave_addr> <value>

 

regards,

Anand

Thanks Anand - I hope this works.
When you write "slave address" and "slave value" are you talking about the actual register addresses that we changed in the issdrv_mt9j003_config.h file?
Because in the DCC window application, there are also other types of fields called "registers".
Thanks,
Mechi

And how do I read a register?

> i2c read <addr> <num_registers> ????

as in the i2c_rdwr file? Where will the returned value be stored?

Anand -
When you say " from the U-boot command line" - what do you mean?
The i2c command is not recognized by the shell. Also there's no "i2c" script/program in /opt/ipnc.
Do you mean before the usecase is active?
I need to set register values as the usecase is working and the video is streaming.
Thanks again,
Mechi

Mechi,

Mechi Fendel said:

When you say " from the U-boot command line" - what do you mean?
The i2c command is not recognized by the shell.

See if the below e2e thread will be in help:

BR
Pavel

The real answer to all of these questions is the i2c_rdwr utility in /opt/ipnc/bin.

./i2c_rdwr.out

gives:

I2C Test Utility,
Usage: ./i2c_rdwr.out -r|-w <devAddrInHex> <regAddrInHex> <regValueInHex or numRegsToReadInDec>

This i2c_rdwr utility only accepts register addresses and values of 1 byte in size. The registers of the MT9J003 contain 16-bit data, and the register addresses of registers that can be programmed are greater than 256.
How can this utility be used for setting/reading the MT9J003 registers?

I tried to read register address 0 - which should give 0x2C01 - the model ID:

root@DM8127_IPNC:/opt/ipnc/bin# ./i2c_rdwr.out -r 0x36 0x0 1
OSA_i2cTestMain: devAddr=54 regAddr=0 numRegs=1 regValue8=0
ERROR (osa_i2c.c|OSA_i2cTestMain|265): OSA_i2cOpen( instId = 3 )
root@DM8127_IPNC:/opt/ipnc/bin#

The device address is from the issdrv_mt9j003_config.h file - 

#define MT9J_003_ADDR (0x36) // CCI write address

Since 0x36 is the write address, I tried 0x37 (usually LSB differentiates between i2c read/write instructions) also - but received same error as above.

The OSA_i2cTestMain printout is from debugging code that i added to the function.

What did I do wrong?

How can I access the MT9J003 registers this way?

Thanks,
Mechi