Using Reset on ILI9341 board

[edringel]

I am working on a library for the ILI9341 and I am making a lot of changes to code and to some information on an SD card. When I push the reset button on the Teensy, I am finding that the display device gets "stuck" unless I power it and the teensy down and then re-program the teensy. I've been experimenting a little bit with the reset pin-- looks like pulling it low and then setting it high again in fact causes a reset. Can anyone offer more concrete parameters? Thanks.

Ed

[Projectitis]

Hi Ed, I've only just got my display so haven't started coding yet - but I've done a bit of reading of the ILI9341 datasheet.
It contains tons of useful info. SOme stuff that may help:
- Using the reset pin, page 218 has a bunch of info, including timing for the pulse
- You can send a command to the display (Software reset). Page 90

[edringel]

Thanks for the link. Hardware reset is easy to implement, and seems to have been at least partially helpful. Hopefully, if this library works, more to come.

[KurtE]

On some boards that I am using these displays, I tie the displays reset line to the CPU reset line, so it gets reset each time the processor resets...

I think the first place I saw that done was with @FrankB's flex board: https://forum.pjrc.com/threads/36869-T3-x-Flexiboard(-)

[Projectitis]

Good tip, KurtE!