I have tried it with a 7" screen and all works well. So I assumed it was the 3.5" Waveshare screen.
So, I ordered another one from Pi Hut (ie no dodgy Fleabay type supplier etc). It came today, and is exactly the same, and the same on 3 different Rpi's, and with two different versions of the Portsdown software.
So, I am a little perplexed as to what the problem can be.
Anyone got any suggestions other than using my 7" screen. I have the old hardware ie modulator board and 4 way switch etc, all this is built into a box that would not easily take a 7" screen. Whats more having bought another 3.5" screen I am loathed to move away from it in that box.
So does anyone have any good ideas? I'm not very computer literate so could someone point me at a downloadable image of something that I could test my screens with, namely just the 3.5" ones.
Answers on a postcard etc etc...
Thanks in advance
I cobbled a 7" screen on it today, and managed to check the amp I wanted to test, and it worked fine on the 7" screen.
Just does not seem to like 3.5 screen (either of them and on several different Rpi's)
There is the possibility that the new screen is faulty too. But i find that a little unlikely.
Can anyone suggest a ready made image of anything that uses the 3.5 screen that I coukd test them with. Obviously the Portsdown, but have tried that on two screens with 4 different Pi's to no avail.
Thanks for suggestions so far.
not wishing to labour the point, but there is an option for a 'Type A' and a 'Type B' 3.5" screen. I have used both types on different Portsdowns and from memory, I don't think having the wrong type selected worked.
Some diagnostics for you to try using the Portsdown.
With your faulty screen fitted, and the RPi connected to your network, boot up your Portsdown. Then log in to the RPi by ssh. You should get the Portsdown console Menu.
- Select Shudown
- Then select "Exit to Linux"
- at the prompt type gui and press enter
Code: Select all
Supported events: Event type 0 (Sync) Event type 1 (Key) Event code 113 (Mute) Event code 114 (VolumeDown) Event code 115 (VolumeUp) Event code 163 (NextSong) Event code 164 (PlayPause) Event code 165 (PreviousSong) Event code 169 (Phone) Event type 4 (Misc) Event code 4 (ScanCode) Input device name: "ADS7846 Touchscreen" Supported events: Event type 0 (Sync) Event type 1 (Key) Event code 330 (Touch) Event type 3 (Absolute) Event code 0 (X) Value 0 Min 0 Max 4095 Event code 1 (Y) Value 0 Min 0 Max 4095 Event code 24 (Pressure) Value 0 Min 0 Max 255
To shutdown safely, just press ctrl-c and "sudo shutdown now"
Final thought: Have you tried any of the programs here: https://www.waveshare.com/wiki/3.5inch_RPi_LCD_(A)