the TVP5158 didn't detect the signal

sheng zhou

Other Parts Discussed in Thread: TVP5158

I'm now in my hardware of DM8168, the tvp5158 didn't detect the signal, the print log is :

CAPTURE ERROR: Could not detect video at tvp instace 0!!!
CAPTURE ERROR: Could not detect video at tvp instace 1!!!
CAPTURE ERROR: Could not detect video at tvp instace 2!!!
CAPTURE ERROR: Could not detect video at tvp instace 3!!!

I read the tvp5158 register ,DEVICE_TVP5158_REG_STATUS_1 = 0x10,DEVICE_TVP5158_REG_STATUS_2 = 0x18, and in the later ,the value alse can be changed, show this:

regValue[0] = 10 , regValue[1] = 18
regValue[0] = 10 , regValue[1] = 18
regValue[0] = 10 , regValue[1] = 18
regValue[0] = 10 , regValue[1] = 8
regValue[0] = 7e , regValue[1] = 80
regValue[0] = 10 , regValue[1] = 38
regValue[0] = 10 , regValue[1] = 38
regValue[0] = 10 , regValue[1] = 38
regValue[0] = 10 , regValue[1] = 38
regValue[0] = 10 , regValue[1] = 18
regValue[0] = 10 , regValue[1] = 18
regValue[0] = 10 , regValue[1] = 18
regValue[0] = 7e , regValue[1] = a0
regValue[0] = 10 , regValue[1] = 38
regValue[0] = 10 , regValue[1] = 38

who can tell me , why the tvp5158 cann't detect the video, thank you!

my software version is 01.09.01.21.

over 13 years ago

0 Yogesh Marathe over 13 years ago

TI__Expert 7765 points

Hi,

Are you on dm8168 evm + VS daugther card or you are on dm8168 DVR? The msb (8th bit) of DEVICE_TVP5158_REG_STATUS_2 indicates whether the signal is present or not. In your case follwoing entries are showing correct status.

regValue[0] = 7e , regValue[1] = 80
regValue[0] = 7e , regValue[1] = a0

are you sure you are using tight DVR_RDK_BOARD_TYPE in Rules.make? tvp addresses are different for DM816X_EVM and DM816X_DVR.

You can also cross verify if the signal is present or not even before running any application using i2c_rdwr utility. Usage is as followed.

./bin/i2c_rdwr.out -r|-w <devAddrInHex> <regAddrInHex> <regValueInHex or numRegsToReadInDec>

TVP address for your platform can be found in dvr_rdk\mcfw\src_linux\devices\src\devices.c

Regards,

Yogesh.

0 sheng zhou over 13 years ago in reply to Yogesh Marathe

Prodigy 195 points

I have solved it ,thank you for your help!

Regards,

zhou sheng

0 Changsheng Li over 11 years ago in reply to sheng zhou

Expert 2445 points

my error is same as sheng zhou.

how to do it? thanks

0 Strachey over 9 years ago in reply to sheng zhou

Intellectual 920 points

Hi zhou sheng,
I meet the same as you now. Could you told me how to fix it?
Thanks!
BR!

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the TVP5158 didn't detect the signal