You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
I think RS485 adaptors should be fine at 3.3v. I've definitely used them in the past without problems. Sometimes you need terminating resistors on RS485 itself though?
Sending the actual data should take ~12ms at 9600 baud, so there's lots of leeway (for 60fps or so!). About the only thing I can think of is that the display itself looks for TX_ENABLE_PIN to go low or waits for ~350ms. So you could try experimenting with ways to control TX_ENABLE_PIN?
Having said that, have you seen thess displays updating any faster than every ~400ms? I can totally imagine they're just not designed for fast updates.
The video on the internet using a massive display to show video said something about them using custom controllers for faster updates - so presumably that was because the standard controllers just don't do the high speeds?