Go to advanced search

by archee
Thu Nov 21, 2019 11:01 pm
Forum: Beginners
Topic: PI4 killed by Power Delivery charger
Replies: 25
Views: 1389

Re: PI4 killed by Power Delivery charger

Clearly the information we have is either incomplete or inaccurate. The guilty PSU looks like this: https://www.xiaomitoday.com/wp-content/uploads/2017/04/Chuwi-Hi13-Unboxing-With-Detailed-First-Look.0007.jpg On other devices it does the following: Samsung S8 phone - charges at approx. 10W Powerban...
by archee
Thu Nov 21, 2019 8:48 pm
Forum: Beginners
Topic: PI4 killed by Power Delivery charger
Replies: 25
Views: 1389

Re: PI4 killed by Power Delivery charger

It used to work fine with USB-A 2.4A chargers, but now it doesn't.
by archee
Thu Nov 21, 2019 8:28 pm
Forum: Beginners
Topic: PI4 killed by Power Delivery charger
Replies: 25
Views: 1389

Re: PI4 killed by Power Delivery charger

I see, probably the tablet charger breaks the standard, as it can't lower it's voltage. So good PD chargers should work or at least won't kill it.
It's dead, because it doesn't work with other chargers either.
by archee
Thu Nov 21, 2019 5:56 pm
Forum: Beginners
Topic: PI4 killed by Power Delivery charger
Replies: 25
Views: 1389

PI4 killed by Power Delivery charger

My Chinese tablet came with a Keyu 12V 2A Power Delivery compatible USB-C charger. I regularly use it to charge random devices like phones, power banks, and it works fine. I thought it can possible lower the voltage for incompatible devices since it's USB-C standard. When I connected it to my PI4 I ...
by archee
Sun Sep 01, 2019 12:25 pm
Forum: OpenGLES
Topic: Wrong textures rendered
Replies: 3
Views: 3119

Re: Wrong textures rendered

That's right. Putting the latest MESA in Raspbian will solve the problem.
by archee
Mon Aug 19, 2019 4:16 am
Forum: OpenGLES
Topic: Wrong textures rendered
Replies: 3
Views: 3119

Re: Wrong textures rendered

The textures are fixed, if I call glVertexAttribPointer within the loop after each texture change. Is there a way to let the opengl driver makers know about this bug?
by archee
Mon Aug 19, 2019 12:25 am
Forum: OpenGLES
Topic: Wrong textures rendered
Replies: 3
Views: 3119

Wrong textures rendered

Hello, In my render loop I cycle through the textures used in the scene: for(int texi=0;texi<textureCount;texi++) { glBindTexture(GL_TEXTURE_2D, textures[texi]); glDrawElements(GL_TRIANGLES, ... ); } I'm getting wrong textures rendered in may batches unless I put a glFlush() in the loop, which makes...
by archee
Fri Nov 23, 2018 11:58 am
Forum: Graphics programming
Topic: SDL2: SDL not configured with OpenGL/GLX
Replies: 1
Views: 2947

Re: SDL2: SDL not configured with OpenGL/GLX

After some research, I realized, the hardware can't do ES 3.0, or modern desktop OpenGL, so I'll just make an ES 2.0 version of the graphics for low-end HW.

Good news, the Tinker Board might support ES 3.0 (which is good for ray-traced spheres, texture stored transformation matrices and more)
by archee
Thu Nov 22, 2018 4:07 pm
Forum: Graphics programming
Topic: SDL2: SDL not configured with OpenGL/GLX
Replies: 1
Views: 2947

SDL2: SDL not configured with OpenGL/GLX

Hi, I'm getting the following message from SDL_GetError() when CreateWindow fails: "SDL not configured with OpenGL/GLX" I ran configure --disable-video-opengles, but didn't help. What's the simplest practice for porting a game to the PI 3, that already works on Windows with SDL2 openGL and on mobile...
by archee
Sat Jan 14, 2012 12:51 am
Forum: General discussion
Topic: ARMv7 (Cortex-A8)
Replies: 16
Views: 14389

Re: ARMv7 (Cortex-A8)

Thanks, I didn't know, the A8 was so expensive.
by archee
Fri Jan 13, 2012 11:10 pm
Forum: General discussion
Topic: ARMv7 (Cortex-A8)
Replies: 16
Views: 14389

Re: ARMv7 (Cortex-A8)

<t>The ARMv7  (Cortex-A8) with 1GHz appears in a lot of Android phones together with a good GPU.<br/> <br/> I don't know how much is the difference in cost to the ARMv6 (ARM11) which you are using, but probably marginal.You might even make a deal for co-production with a phone maker to save cost (I'...

Go to advanced search