Portsdown 5 Installation

[G8GKQ]

Hi Stan

That looks to be a problem with the screen that you are using. Please could you try it with the official touchscreen (and, if that works, post a photo of the one that didn't work?)

73

Dave

[NJ6E]

Hello again,

Here is an update to my progress in installing Portsdown 5. In the prior message, Dave concluded that the DSI 7-inch touchscreen that I was using likely is not compatible with Portsdown 5, and that I should try the install with an official Pi 7-inch touchscreen attached.

I decided to exchange screens with a Portsdown 4 system that I have that uses the official Pi 7-inch screen. I found that the DSI display appears to work fine with all functions of the PD4, as others have noted. A photo of the back of that display is attached. In using the Pi screen for the PD5, the install did run this time, with Stage 2 taking less than a minute to complete. I did see the Stage 2 install messages, but the screen image is doubled and distorted, as shown in the attached photo. To confirm that there was no hardware problem, I made a new 64-bit Trixie desktop OS SD card and it runs normally on the Pi 5/Pi screen with keyboard and mouse attached.

I am not sure why my PD5 installation continues to fail, but I hope that my experiences are of help in program development. My interest is in trying out the revised receive and test equipment functions, but I certainly can wait for PD5 to become further developed before trying again.

73,

Stan NJ6E

[G8GKQ]

Hi Stan

Very interesting! I'm sure that you haven't, but please confirm once more that you have nothing connected to the HDMI sockets on the Raspberry Pi?

I'll do some test builds tomorrow to try to reproduce the problem.

73

Dave

[NJ6E]

Hi Dave,

Yes, that is correct. Nothing is attached to the Pi 5 other than the display, power and network cables.

73,

Stan NJ6E

[g0mjw]

There are two connectors for the screen on the PI5. Which one did you use? When I tried this, only one of them worked.

Mike

[G8GKQ]

Hi Stan

I have been experimenting with different screens and settings this afternoon and have some answers, but am still unable to explain the display that you have posted above.

First I did a fresh Portsdown 5 build with the Raspberry Pi 5 and the 7 inch 800x480 Rasperry Pi touchscreen. All worked as expected.

Then I disconnected the "official" touchscreen and connected the cheap screen that you have also tried. Nothing on the display (although it had worked on a Portsdown 4). After some head scratching, I realised that the Pogo Pins that would normally take power from the underside of the 40-way GPIO connector to the screen were not making good contact and on connecting the +5v to the power connector the screen sprung into life and worked perfectly.

As to why your official screen does not work, please try the following:

• Check that the ribbon cble is in the socket labelled CAM/DISP 0 nearest the network port. As Mike says, this is important.
• Check the text in /boot/firmware/cmdline.txt. Please log on by ssh and type

  Code: Select all

  cat /boot/firmware/cmdline.txt

  Then copy and paste the contents here.

Please let me know how you get on

Dave

[NJ6E]

Hi Dave,

Of course, my display cable was inserted into the other connector (the one farthest from the network port). I moved it to the one next to the network port and replaced the SD card with the one containing my last installation attempt. That fixed the issue and all has now booted up successfully. I haven't tried to do much yet, but I did program our local repeater (w6cxatv) into the stream viewer and it looks fine.

I don't think that I was having a powering problem with the DSI display, as I could see that the backlight was illuminated during my unsuccessful installation attempts. But of course its cable was plugged into the other display socket. I guess the real test would be to try a fresh install with the DSI display plugged into the proper port.

See below for the result of the command that you asked me to run. I suspect that it is as expected for a normal installation.

Thanks to you and to Mike for figuring out my issue. Now I look forward toattaching a Lime Mini and MiniTouner/Picotuner to check out the Portsdown 5 features!

73,

Stan NJ6E

pi@raspberrypi:~ $ cat /boot/firmware/cmdline.txt
console=serial0,115200 console=tty1 root=PARTUUID=0ec75621-02 rootfstype=ext4 fsck.repair=yes rootwait video=DSI-1:800x480M-16@60 video=DSI-2:720x1280@60,rotate=270 video=HDMI-A-1:1280x720M@60 vt.global_cursor_default=0
pi@raspberrypi:~ $