I2CSet Error: Write failed

Haoran Li1

Other Parts Discussed in Thread: TVP7002

Hi,

I am now using EVM8168 + xIO Catalog Daughter Card. I could successfully capture video signal from TVP7002_1(U22) to VIN0 port. Now I am trying to take advantage of the TPV7002_2 chip (U21).

Noticing the I2CAs are not the same (TVP7002_1 address = 0x5D, TVP7002_2 address = 0x1D), I used the command "i2cset -y 2 0x1D 0x01 0x89". However, the command line posts some error info immediately and indicates that I failed to write to such an address.

Fig. 1 Failed to write 0x1D.

Yet I could successfully write 0x5D (TVP7002_1).

Fig. 2 Success in writing 0x5D

How could I configure the TVP7002_2 by using i2cset? Is there any mistake in my command?

Could you give me a hand?

Naroah

Mar/14/2014

over 11 years ago

0 Badri Narayanan over 11 years ago

TI__Guru 59700 points

EIO schematics at :http://support.spectrumdigital.com/boards/evm816xiodc/revc/

The TVP7002 address connected to VIN1 is not 0x1D. It is 0x5C .You have to configure PCF 8575 correctly as well.

0 Haoran Li1 over 11 years ago in reply to Badri Narayanan

Expert 1850 points

Hi Badri,

Thank you for your reply.

You are right. By replacing the 0x1D with 0x5C, I would never see this Error again.

Finally, I could take advantage of the VIN1 PortA for capturing. However, an VIP1 Overflow error exists, which never appears in my VIP0 capture usecase. Anyway, I would close this thread and post another to talk about such an issue.

Naroah

Mar/14/2014

Processors

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I2CSet Error: Write failed