LPC4357 and TVP5150 Video (BT.656 / YCbCr)

[lpcware]

Content originally posted in LPCWare by pcproa on Wed May 21 16:50:25 MST 2014
Hi Everyone,

I’m starting to develop with an LPC4357. I’ve migrated from the LPC1788, mainly because the added performance of the LPC43xx  is stated to be capable of running video.

I’m trying to run video on my LPC4357 using a TVP5150 Composite NTSC to ITU-R BT.656 conversion chip and an 800*480 7” TFT LCD. I’m having a very hard time getting this to work on the SGPIO lines via modifying the camera SPGIO example that’s provided by NXP.

I saw one NXP video where it was explicitly said by the presenter that there is a BT.656 example available for the LPC4357 out there, but I can’t seem to find one any example coding for it. Has anyone come across that?

Also, I’m making very slow progress with this chip, but the last change gave me the ability to see a bit of the potential refresh rate. I’ve read it is possible to do 30fps at 1024*1024 resolution, but this barely does 1fps at 800x480. When I run example programs on it as well showing the refresh rate, it seems that there’s also a lot of flicker with those, particularly with emWin examples.

Are there better examples out there to work with BT.656 and the LPC4357, or has anyone worked with the TVP5150 and the LPC43xx series that has any input on potential issues, problems or changes that I have to make?

Thanks in advance,

Patrick

[lpcware]

Content originally posted in LPCWare by pcproa on Fri May 23 15:39:06 MST 2014
Thanks

The LCD is good, and so is the TVP5150. I am watching the static from the TVP5150 and noticing that the refresh rate on the MCU is extremely slow. I am  also watching it with the debugger in Keil and it is just slow.

The video that it mentions BT.656 is here

https://www.youtube.com/watch?v=2KPZ3TCcKVY

At 8:40 the slide for the BT.656 is shown, but he is still talking about the previous topic and doesn't begin referring to the BT.656 slide until the 9:00 mark.

[lpcware]

Content originally posted in LPCWare by xianghuiwang on Fri May 23 12:57:54 MST 2014
Hi, Patrick,

Think you need to identify whether the issue is the LCD display or the image collection.

You can feed in some static image and put the part in debug mode to see if the image is collected correctly first.

Could you tell us which NXP video said BT.656 example availability?

Good luck!