Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 17:22 20 Nov 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : PicoMite - using ILI9341 panel as a console

Author Message
marvbloke
Newbie

Joined: 16/03/2022
Location: United Kingdom
Posts: 3
Posted: 08:58pm 17 Mar 2022
Copy link to clipboard 
Print this post

Hi all,

Firstly a big thanks to everyone involved in bringing MMBasic to the Pico. I'm loving this project!

And now for my first problem. I've got PicoMite/MMBasic running well on a breadboard using a Waveshare 2.4 inch LCD (ILI9341 SPI display). It looks great, and runs the circles demo really well. However, I'm hoping to use it as a console (using OPTION LCDPANEL CONSOLE), which works fine until you get to the bottom of the screen. Instead of scrolling, most of the screen turns white apart from the bottom row of text. Here's a video which shows the problem better than I'm describing it.

The manual does mention issues with scrolling, but wondered if there was a solution to the issue?
Edited 2022-03-18 06:59 by marvbloke
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10619
Posted: 10:48pm 17 Mar 2022
Copy link to clipboard 
Print this post

You haven't got MISO connected
 
marvbloke
Newbie

Joined: 16/03/2022
Location: United Kingdom
Posts: 3
Posted: 09:34am 18 Mar 2022
Copy link to clipboard 
Print this post

Ah - that's it. This particular panel doesn't have a MISO connection, so I've ordered a couple that do. Thanks!
 
al18
Senior Member

Joined: 06/07/2019
Location: United States
Posts: 231
Posted: 08:32pm 18 Mar 2022
Copy link to clipboard 
Print this post

I believe the PicoMite firmware supports both the Waveshare PicoTouch 3.5 inch LCD and the Waveshare Pico Evaluation board with the same 3.5 inch LCD and a lot more sensors
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10619
Posted: 10:32pm 18 Mar 2022
Copy link to clipboard 
Print this post

  Quote  I believe the PicoMite firmware supports both the Waveshare PicoTouch 3.5 inch LCD and the Waveshare Pico Evaluation board with the same 3.5 inch LCD and a lot more sensors

and neither of those have MISO available so cannot be used as console devices
 
hitsware2

Guru

Joined: 03/08/2019
Location: United States
Posts: 735
Posted: 11:20pm 18 Mar 2022
Copy link to clipboard 
Print this post

This one works ..
my site
 
al18
Senior Member

Joined: 06/07/2019
Location: United States
Posts: 231
Posted: 01:50am 19 Mar 2022
Copy link to clipboard 
Print this post

Please report back to confirm if the 2.8 inch display works. Both of the 3.5 inch displays I mentioned have pin GP12 labeled as SPI MISO pin.
 
phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2832
Posted: 07:11am 19 Mar 2022
Copy link to clipboard 
Print this post

GP12 is the SPI MISO pin for the Pico, the issue I think Peter is referring to is that the display does not have it's MISO (also called SDO) output available to connect to the Pico on those units.
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10619
Posted: 07:51am 19 Mar 2022
Copy link to clipboard 
Print this post

There are only three SPI displays that can be used as (very slow scroll) console devices.
ILI9341 (but only if MISO is available), ILI9488/86 (connect MISO with a 680ohm resistor as the controller doesn't tri-state properly) and the 2.8" Waveshare ST7789
 
marvbloke
Newbie

Joined: 16/03/2022
Location: United Kingdom
Posts: 3
Posted: 08:30am 19 Mar 2022
Copy link to clipboard 
Print this post

Thanks everyone. The project I'm working on needs a 2.4 inch screen - no bigger. So the ones I've ordered (which are 2.4 inch ILI9341 with a MISO connection) should do the trick. I'll report back after they arrive next week.
 
hitsware2

Guru

Joined: 03/08/2019
Location: United States
Posts: 735
Posted: 04:13pm 19 Mar 2022
Copy link to clipboard 
Print this post

Definitely works
  al18 said  Please report back to confirm if the 2.8 inch display works. Both of the 3.5 inch displays I mentioned have pin GP12 labeled as SPI MISO pin.

( Do not know about specific needs )
my site
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025