Search found 33 matches

by floppes
Mon Sep 16, 2019 5:15 am
Forum: Arduino
Topic: INA260 Question
Replies: 2
Views: 149

Re: INA260 Question

The INA260 seems to be a very nice and powerful board. But I think it is a little too much for your needs. Do you really want to meaure the current? To get the battery percentage, it is enough to measure the battery's voltage. This can be done with any of the Bluefuit's analog inputs. Just connect t...
by floppes
Tue Sep 03, 2019 9:20 am
Forum: General Chat (Game Boy Zero)
Topic: Testing a new 3.5” 640x480 IPS DPI LCD
Replies: 12
Views: 1164

Re: Testing a new 3.5” 640x480 IPS DPI LCD

The initialization data is usually not stored in the LCD controller. You have to initialize it on every power up.
The parameters are not trivial, especially if you have to write a gamma table. You will need to ask the manufacturer for the correct initialization data or sniff it [;)]
by floppes
Wed Jul 17, 2019 12:20 pm
Forum: General Hardware
Topic: Change 3.5" HDMI display boot logo
Replies: 40
Views: 9825

Re: Change 3.5" HDMI display boot logo

Can you please send me the firmware and a picture of the cable with the display model name to floppes@gmx.de? I will check it and add it on Sunday when I'm back home.
by floppes
Tue Jul 16, 2019 1:26 am
Forum: General Hardware
Topic: Change 3.5" HDMI display boot logo
Replies: 40
Views: 9825

Re: Change 3.5" HDMI display boot logo

There seems to be a different EEPROM on your board. It should be compatible with the known ones. If you are familiar with coding, you can add your JEDEC ID in the code and it should work. Or just replace 0x1C3113 in line 47 of rtd266x.cpp with your ID. Are you sure it says LGH-3905? I've seen LGH-35...
by floppes
Mon Jun 24, 2019 5:05 am
Forum: Hardware Help
Topic: HDMI Display Problems with Pi 3A+ and LS060R1SX01 screen
Replies: 3
Views: 237

Re: HDMI Display Problems with Pi 3A+ and LS060R1SX01 screen

I had a similar problem with a 320x480 DPI display. It's native orientation was portrait mode, but I wanted it to be in landscape mode. Just rotating it resulted very similar to your second picture: big black borders and the aspect ratio didn't change. By forcing the framebuffer size ( not the maxim...
by floppes
Tue Jun 11, 2019 2:43 am
Forum: Support (Game Boy Zero)
Topic: Pwm audio with retropie 4.4 and fresh install
Replies: 4
Views: 299

Re: Pwm audio with retropie 4.4 and fresh install

Did you set the audio output in the RetroPie Audio setup to "Headphones - 3.5 mm jack"?
RetroPie setupShow
audio1.png
audio1.png (80.67 KiB) Viewed 272 times
Audio setupShow
audio2.png
audio2.png (4.93 KiB) Viewed 272 times
by floppes
Thu May 23, 2019 6:26 am
Forum: Support (Game Boy Zero)
Topic: Connecting shoulder buttons to ground - where? [SOLVED]
Replies: 5
Views: 305

Re: Connecting shoulder buttons to ground - where?

Yes, the Pi has several GND pins. They are all connected internally. You can use any of them.

Just make sure your solder connection is good and the wire is thick enough for the current it has to conduct.
by floppes
Thu May 23, 2019 5:23 am
Forum: Support (Game Boy Zero)
Topic: Connecting shoulder buttons to ground - where? [SOLVED]
Replies: 5
Views: 305

Re: Connecting shoulder buttons to ground - where?

Generally speaking, you should have all GNDs connected. The GND of the Raspberry Pi should be connected with the GND of your PCB and the GNDs of your shoulder buttons. That's called a "common ground". How you do this is up to you.
by floppes
Tue May 21, 2019 9:20 am
Forum: General Project Chat
Topic: New RetroStone SBC gaming handheld
Replies: 4
Views: 636

Re: New RetroStone SBC gaming handheld

I was under the impression this chip didn't support DPI/RBG but one of the pictures clearly states "AV->RGB24". I guess I've been mistaken? The Kickstarter campaign of the original RetroStone has the same picture with "AV->RGB24". I think the only difference is the aluminium case and the lack of th...
by floppes
Tue Apr 02, 2019 1:35 pm
Forum: General Hardware
Topic: Change 3.5" HDMI display boot logo
Replies: 40
Views: 9825

Re: Change 3.5" HDMI display boot logo

I have updated the project to v2.0 and added a Python script. This script allows you to read and write the firmware from a Raspberry Pi through a regular HDMI cable. No modified cable needed. You just need to enable the second I2C interface on the Pi, the GitHub page explains how this is done. With ...