Go to advanced search

by JinShil
Thu May 18, 2017 11:09 am
Forum: Windows 10 for IoT
Topic: Horrendous Boot Times for Windows 10 IoT
Replies: 5
Views: 4714

Re: Horrendous Boot Times for Windows 10 IoT

I have several of these now and only had boot issues with a handful of patriot sd cards so I don't use them much any more. Just as a test I started up and was on the app load screen in ~30 seconds and my app was fully loaded in 35 seconds. So it may be that booting for win iot is more io bound than...
by JinShil
Tue May 16, 2017 4:58 am
Forum: Graphics programming
Topic: libbrcmXXX.so vs libXXX.so
Replies: 2
Views: 1800

libbrcmXXX.so vs libXXX.so

In /opt/vc/lib one can see libraries with the name libbrcmXXX.so and others named libXXX.so. For example:

libbrcmEGL.so and libEGL.so
libbrcmOpenVG.so and libOpenVG.so
libbrcmGLESv2.so and libGLESv2.so

How are these different? When would one want to use one over the other?

Thanks,
Mike
by JinShil
Fri May 12, 2017 11:36 am
Forum: Windows 10 for IoT
Topic: Horrendous Boot Times for Windows 10 IoT
Replies: 5
Views: 4714

Horrendous Boot Times for Windows 10 IoT

Hello, I'm seeing about a 1 minute boot time on the Raspberry Pi 2 and 3 when using Windows 10 IoT core. By comparison, the Linux Raspian default distribution boots in less than 30 seconds on the same hardware. If I boot to a console in Raspian Linux, it's even less. I asked a similar question a whi...
by JinShil
Thu Apr 20, 2017 1:07 pm
Forum: Graphics programming
Topic: Drawing images
Replies: 1
Views: 1182

Re: Drawing images

I've personally found the OpenVG implementation to be great for 2D drawing (including images). Specifically, take a look at http://mindchunk.blogspot.kr/2012/09/openvg-on-raspberry-pi.html , and the accompanying github repository at https://github.com/ajstarks/openvg . That library also has code for...
by JinShil
Sat Mar 25, 2017 6:35 am
Forum: Graphics programming
Topic: Hardware Accelerated 2D in X
Replies: 0
Views: 1252

Hardware Accelerated 2D in X

I'm in need of a method to do hardware accelerated 2D in an X Window. Without Using the GL Driver I've done some testing with Dispmanx+EGL+ nanovg and Dispmanx+EGL+OpenVG using the /opt/vc implementations without running the Raspberry Pi GL driver. Dispmanx+EGL+OpenVG is really fast, but my requirem...
by JinShil
Fri Mar 24, 2017 6:33 am
Forum: Compute Module
Topic: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release
Replies: 9
Views: 1724

Re: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release

The problem turned out to be a cross-talk problem on our PCB. We had the activity LED pin connected to a FET that ran underneath our USB lines on a different PCB layer. The commit specified in my first post on this issue caused the LED pin to blink on and off creating cross-talk on our USB lines. Af...
by JinShil
Fri Mar 24, 2017 1:24 am
Forum: OpenGLES
Topic: Is it not possible to run my OpenGLES2 game in a window?
Replies: 3
Views: 3259

Re: Is it not possible to run my OpenGLES2 game in a window?

Does anyone know how to access the OPENGLES driver from C++ routines ?
That post is not related to this thread, and it would not be appropriate for me to take this thread on such a tangent. If you would like to post your question in a separate thread I'll gladly share what I know.
by JinShil
Thu Mar 23, 2017 1:44 am
Forum: Compute Module
Topic: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release
Replies: 9
Views: 1724

Re: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release

Just an FYI: We are still investigating this. It can be used for configuring the MAC address and other setting of the LAN9514 Are you implying that there may be some setting on the EEPROM on the RPi3 that may be required? It doesn't seem to matter as illustrated in our test described below. We found...
by JinShil
Thu Mar 23, 2017 12:56 am
Forum: Graphics programming
Topic: Dispman or DispmanX
Replies: 1
Views: 1614

Dispman or DispmanX

I see many referring to the low level VC API as Dispman. However, in the code I see that most functions and types are prefixed with "DISPMANX" or "dismpanx".

What is the appropriate terminology? Is it "Dispman" or "DispmanX"? If the former, what is the significance of the "X"?

Thanks,
Mike
by JinShil
Tue Mar 21, 2017 11:35 pm
Forum: Graphics programming
Topic: Virtual analog instruments
Replies: 2
Views: 1348

Re: Virtual analog instruments

Apart from commercial products like Labview, can anyone suggest a simple way to show analog style gauges using a Pi, or Linux in general There are so many different ways, let's try to narrow it down. What programming language would be your preference? What graphics frameworks are you already famili...
by JinShil
Tue Mar 21, 2017 10:24 pm
Forum: Graphics programming
Topic: Getting Dispmanx window/layer/element from a X Window
Replies: 3
Views: 1877

Getting Dispmanx window/layer/element from a X Window

I'm a little new to programming the Raspberry Pi, but from what I've read, I'm under the impression that everything on the screen is eventually just a Dispmanx entity (window/element/layer/resource whatever the terminology is). Is this also true for X Windows? If so, is there any way to get the Disp...
by JinShil
Mon Mar 20, 2017 4:34 am
Forum: Compute Module
Topic: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release
Replies: 9
Views: 1724

Re: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release

oliverks wrote: Mike this is a little off topic, but are you using an EEPROM connected to the LAN9514 with the CM3L because it is not clear that the RPi3 uses one.
No, we don't have an EEPROM connected to the LAN9514. I don't know what purpose doing so would serve.
by JinShil
Wed Mar 15, 2017 12:11 pm
Forum: Compute Module
Topic: CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release
Replies: 9
Views: 1724

CM3L + LAN9514 Problems after Feb. 2017 Raspbian Release

Hello, We are using the CM3L with a LAN9514 connected in what we think is identical to the RPi3 B. All was working well until the February 2017 Raspbian release. If we use any Raspbian release after January 2017, the USB and Ethernet become flaky (Missing key-presses from USB keyboard. USB mouse tha...

Go to advanced search