Linux/DS90UB960-Q1: Internally Generated frame sync issue

Leo Wu28

Prodigy 210 points

Part Number: DS90UB960-Q1
Other Parts Discussed in Thread: ALP

Tool/software: Linux

Hi Ti Team,

I have a problem about Internally Generated frame sync,

I follow the example from datasheet to set the DS90UB960 and DS90UB953, as below.

but I cannot capture any images from deserializer (DS90UB960).

I found out the MIPI-CSI2 CLK (output from deserializer) is too small around 32MHz, but the correct value should be 200MHz based on DS90UB960 datasheet.

Do you have any suggestions for debug further?

Thanks!

over 6 years ago

0 Leo Wu28 over 6 years ago

Prodigy 210 points

Hi Ti Team,

Sorry for my mistake, the sample code that I used is Pattern Generator Example from DS90UB960-Q1 datasheet 7.5.12.4

CSI Mode is RAW10

Do you have any suggestions?

0 Steven(Shenzhen) Shi over 6 years ago in reply to Leo Wu28

TI__Mastermind 30515 points

can you capture the CSI2_CLK signal? this CSI2 rate and clock is configured by CSI2 registers inside UB960. if CSI2 port is set correctly, the CSI2 clock and data should be right.

For the pattern generation, you can also use ALP tool to generate this pattern and select the example code in UB960 d/s.

best regards,

Steven

0 Leo Wu28 over 6 years ago in reply to Steven(Shenzhen) Shi

Prodigy 210 points

Hi Steven,

Thanks for your reply,

I still have some question,

1. Is a reset command required before pattern generation operation?

# Reset
board.WriteReg(0x01, 0x01)

2. How about the I2C programming time of DS90UB960? Do I need to add a delay after any register's programming ?

3. I can't see any information from ALP tool US90UB964 Device

Thanks!

0 Steven(Shenzhen) Shi over 6 years ago in reply to Leo Wu28

TI__Mastermind 30515 points

1.not must but it is better.
2. not needed. the delay is required after the reset command
3. it means the link is NOT available. please check your ALP tool is installed correctly?

best regards,S
teven

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Linux/DS90UB960-Q1: Internally Generated frame sync issue