One screen works and another doesn't, comms problem

[avacta]

Hi,
I have two uLCD-43PTs. I did my initial code development with one using 9600 baud for all the comms. Then I found I needed to go faster, but when I changed the baud rate I got lots of timeout errors when trying to communicate with the display. So I tried the other display and found it worked fine at various baud rates up to 56000 (might work faster but haven't tried). But the first display still won't play except at 9600 baud.

Waveforms on the scope all look nice and square.

Any idea what is going on?

Cheers,

Mark

[ESPsupport]

No idea.

However, PmmC loading occurs at 115200 baud, so it seems mighty odd that you are seeing issues at any rate lower than this.

Are you on the latest PmmC? There was an issue with Touch causing issues like this on an earlier PmmC.

[avacta]

Hi, I've checked the firmware versions (why don't you put them on the default splash screen?) and the one that works is v34 whereas the one that doesn't is v33. So I guess that's our answer.

Cheers,

Mark