DS90UB960-Q1: UB960 CSI-2 PORT Frame Counter with Errors

user6259994

Part Number: DS90UB960-Q1

Hi Ti :

We use the following scheme : sensor->ub935->ub960

Now I have a problem in the debugging process, I use one camera ,so one ub935 connect to ub960 rx-port0, and select CSI-2 TX Port 1,but I can't get the video from my soc.then I read 0x93-0x94(Frame Counter with Errors) and 0x96-0x97( Line Counter with Errors ), omg, All video frames are wrong !

I dump the i2c reg from ub935 and ub960, I hope I can get help.

Fullscreen ub960-dump.txt Download

~ # i2cdump -f -y 1 0x30
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 60 00 1e 40 d0 01 00 fe 1c 10 7a 7a 11 09 40 fb    `.?@??.???zz??@?
10: 00 00 13 00 00 00 00 00 00 00 00 00 00 00 04 07    ..?...........??
20: e1 08 00 91 00 00 00 00 00 00 00 00 00 00 00 00    ??.?............
30: 00 00 12 03 00 10 00 00 00 00 00 00 00 00 00 00    ..??.?..........
40: 00 a9 71 01 00 00 20 00 00 00 00 12 01 03 14 64    .?q?.. ....????d
50: 00 00 00 03 02 00 00 00 5e 00 00 30 80 20 00 00    ...??...^..0? ..
60: 00 00 00 00 00 90 00 00 00 00 00 00 00 7c 88 88    .....?.......|??
70: 2b 2c e4 00 16 07 80 c5 00 01 00 00 20 00 00 00    +,?.????.?.. ...
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
90: 00 00 00 00 00 00 00 00 00 1e 00 1e 5c 7b 5c 1e    .........?.?\{\?
a0: 00 00 00 00 00 1c 00 00 00 00 00 00 00 00 00 00    .....?..........
b0: 02 49 00 08 25 00 18 00 88 33 83 74 80 00 00 00    ?I.?%.?.?3?t?...
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 43 94 0f 60 f0 00 02 00 69 00 10 00 00 00 00    .C??`?.?.i.?....
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 5f 55 42 39 36 30 00 00 00 00 00 00 00 00 00 00    _UB960..........

Fullscreen ub935-dump.txt Download

~ # i2cdump -f -y 1 0x40
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 30 00 53 48 00 03 9b fa fe 1e 10 7f 7f e1 1e 00    0.SH.??????????.
10: 00 00 00 00 00 20 18 3c 80 62 62 62 00 00 00 00    ..... ?<?bbb....
20: 00 00 00 00 00 02 00 00 67 33 01 00 00 00 00 00    .....?..g3?.....
30: 00 20 09 04 00 10 00 60 00 00 00 00 00 00 00 00    . ??.?.`........
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
50: 20 c0 47 02 00 06 00 00 07 07 07 00 01 00 44 00     ?G?.?..???.?.D.
60: 00 2c 80 07 0d 88 00 00 00 00 00 00 00 00 00 00    .,????..........
70: 00 00 25 00 00 00 00 00 00 00 e4 00 00 00 00 00    ..%.......?.....
80: 00 00 00 00 00 00 90 00 00 00 00 00 07 00 00 00    ......?.....?...
90: 32 e3 64 01 00 00 00 00 00 00 03 05 00 00 20 0f    2?d?......??.. ?
a0: 00 0e 0e 0d 0d 10 42 10 10 10 03 01 00 00 00 00    .?????B?????....
b0: 04 4a 3f 00 00 00 00 00 00 00 00 00 00 00 00 00    ?J?.............
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 5f 55 42 39 35 33 00 00 00 00 00 00 00 00 00 00    _UB953..........

over 5 years ago

0 Jiashow Ho over 5 years ago

TI__Genius 11340 points

Hello,

The vertical resolution (line count) can be read in 960 registers 0x73 and 0x74. The value read in registers 0x73 and 0x74 are in pixels.

The horizontal resolution (line length) can be read in 960 registers 0x75 and 0x76. The value read in registers 0x75 and 0x76 are in byte. It can be converted to pixels using the following equation:
Horizontal Resolution (pixels) = Horizontal resolution (in byte) * 8 (bits/byte) / # bpp

From the register dump you provided, it seems like the 935 is detecting CSI errors on its receiver. This means that the camera isn't initialized properly.

Best,

Jiashow

0 user6259994 over 5 years ago in reply to Jiashow Ho

Prodigy 60 points

Dear Jiashow:

Thank you for answering my question.

My camera is configured to work normally on other UB954 and UB935.

I read 0x73 and 0x74 get vin:# Line Count : 720

I read 0x75 and 0x76 get vin:# Line Length : 1920 1920 * 8 / 12 = 1280

My camera resolution is 1280 x 720 ,That's right。Now I read 0x90 and 0x91 frame counter only 17 ,my camera is 30 fps, So that means loss frame.

But read 0x92 and 0x93 no error.

Above is my use of 400M (write 0x07 to 0x1f) configuration, I measured the UB935 CLK_OUT with an oscilloscope ,Only half the normal clock,Is that

why the frame rate is wrong?

When I use 400Mbps(write 0x03 to 0x1f), 800Mbps, 1.2Gbps, 1.6Gbps (0x1f), I read the frame rate( 0x90 and 0x91 ) correctly, but it was all error ( 0x92 and 0x93 ), My soc support 2.5Gbps/Lane, So I'm wondering why is that. Could this be a hardware interference problem?

This is my first time to use Ub960, so I don't know much about this configuration. Could you please provide me with a register configuration of Ub960 and UB935.

Thank you very much at last

0 user6259994 over 5 years ago in reply to user6259994

Prodigy 60 points

Let me just add:

When I use 400Mbps(write 0x03 to 0x1f), 800Mbps, 1.2Gbps, 1.6Gbps (0x1f), I read 0x73 and 0x74 , This value is going to fluctuate, not a fixed value.

0 user6259994 over 5 years ago in reply to user6259994

Prodigy 60 points

I read registers 0xDB

vin:0xDB data :
vin:# IS_LINE_LEN_CHG INTERRUPT DETECTED
vin:# IS_LINE_CNT_CHG DETECTED
vin:# IS_CSI_RX_ERR DETECTED
vin:# IS_PORT_PASS DETECTED
vin:# IS_LOCK_STS DETECTED
vin:0xDA PORT_ISR_HI :
vin:# IS_FPD3_ENC_ERR DETECTED
vin:# IS_BCC_SEQ_ERR DETECTED
vin:# IS_BCC_CRC_ERR DETECTED

The LOCK and PASS state is changing all the time. Does that mean my hardware is having interference problems with high-speed transmission

0 Jiashow Ho over 5 years ago in reply to user6259994

TI__Genius 11340 points

Hello,

Registers 0x90 and 0x91 just counts the number of frame_end signals (and gets reset after read). It does not indicate the frame rate.

If you are configuring for 400Mbps CSI output, you need to configure additional registers. Refer to section 7.4.19 in the datasheet. The CSI rate is in Mbps, so if you convert it to MHz, you'll need to divide it by 2.

Register 0x73 and 0x74 shouldn't fluctuate. If it does, it means the line count isn't stable and mostly likely caused by the camera not initialized properly. Based on your reported CSI errors, I would double check the camera initialization script.

Here's an example init script for the 960:

#reset
board.WriteI2C(devAddr,0x01,0x01)

#Selects Port
board.WriteI2C(devAddr,0x4c,d_ch)
time.sleep(0.1)

# setup Ser ID and Alias
board.WriteI2C(devAddr, 0x5B, serAddr)
board.WriteI2C(devAddr, 0x5C, ser_alias)

# setup Cam ID and Alias
board.WriteI2C(devAddr,0x5D,camAddr)
board.WriteI2C(devAddr,0x65,cam_alias)

#Set BC rate
board.WriteI2C(devAddr,0x58,0x5E)
time.sleep(0.1)

#Reset serializer
board.WriteI2C(serAlias, 0x01, 0x01)

####insert camera initialization code here####

#CSI output

board.WriteI2C(devAddr, 0x32, 0x01) #Read CSI port 0,write CSI port 0
board.WriteI2C(devAddr, 0x1F, 0x00) #Set timing register to 1600Mbps
board.WriteI2C(devAddr, 0x20, 0xF0) #Disable RX Port Forwarding
board.WriteI2C(devAddr, 0x33, 0x03) #enable CSI and continuous clock
board.WriteI2C(devAddr, 0x20, 0x00) #Forward all RX Ports to CSI Ports 0

Best,

Jiashow

0 user6259994 over 5 years ago in reply to Jiashow Ho

Prodigy 60 points

Hi Jiashow:

I have configured all the places you mentioned, but they still cannot work properly.

I measured the camera signal with an oscilloscope. The height and frame rate of the video were correct, but the signal was wrong after making it ub960

I'll do some research on my own. Of course, if you have any other Suggestions, I hope you can help me.

Thank you very much at last!

0 Jiashow Ho over 5 years ago in reply to user6259994

TI__Genius 11340 points

Hello,

Is register 0x35[0] = b'0? If so, it means there's no valid CSI data coming out of the CSI port. I would recommend checking the camera initialization, since it seems like there's CSI errors detected.

Best,

Jiashow

0 user6259994 over 5 years ago in reply to Jiashow Ho

Prodigy 60 points

Hi Jiashow:

I used the UB935 test mode to verify this, excluding the camera first,

Thanks!

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DS90UB960-Q1: UB960 CSI-2 PORT Frame Counter with Errors