Other Parts Discussed in Thread: TIDA-01473, DLPC2607
Hi everyone,
Context:
I am using the EVM in combination with the Beaglebone Black as recommended in the reference Design (TIDA-01473).
At first I was using Debian 11.7 as it was recommended as the latest image of the BBB, however I couldn't find the scripts mentioned in the Quick start Guide/Users Guide and apparently they've been removed.
So I switched to Debian 8.3 as it was listed on the Beagle's Distros page and still contained the files in the /opt/.. directory.
I didn't have much problems setting up the basic functionality, however I'm planning on using the EVM to project high framerate video.
More specifically, I don't need any gradients or color, I just need to project a fast changing pattern as accurately and equally timed as possible.
Where I need help:
I'm slowly getting the hang of I2C but I could need some help figuring out proper settings and a recommended setup.
Factors I'm considering:
- What filetype + resolution + codec to use
(currently .mp4 / 640x360 / H.264) - Are there different ways for the BBB to send video to the EVM and what is best for my purpose?
(There seem to be different Display modes like Static Display Mode, or parallel bus (might be mixing up something here)) - White Point control
(As I don't need any color, this is unnecessary, but I guess it could still cause some problems) - Pixel data format and other settings I don't know nothing of yet
(I read many settings mentioned that I'm not sure of yet whether they are relevant or not) - FPS setting of EVM (if I understand the Programmers Guide correctly the maximum the EVM can handle is 72(?))
- RGB sequence
- I was planning to use Video which uses red, green and blue channels as separate frames to effectively triple the fps (it's a quick hack, which might've worked on a colorwheel, but now it seems the RGB sequence is RGRGB per frame (also not sure where in the sequence a 'frame' starts), This seems to be changeable via I2C, but I haven't figured out yet how
- More on a side note, when I tried to identify the RGB sequence, I tried to display test videos with mplayer that alternated 100% black and white frames with 30 and 60 fps. both resulted in a horizontal white bar slowly moving down the screen. (Is that what is meant with a "PWM Artifact"?)
TL:DR
In the end I want to project high framerate video, either with a fixed RGB sequence that I can exploit to tripple the FPS (preferred), or just have a B/W mode with higher fps.
As you see I have many questions...
I will continue my search through existing forum posts and documents, but if someone got some answers to my problems please share your knowledge.
