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by jackokring
Fri Apr 22, 2016 4:54 pm
Forum: Weather station
Topic: school proxy
Replies: 7
Views: 1261

Re: school proxy

Have you tried an ipchains solution?
by jackokring
Fri Apr 22, 2016 4:47 pm
Forum: Off topic discussion
Topic: 2038 bug(s)
Replies: 13
Views: 2182

Re: 2038 bug(s)

Maybe a new system call epoch()? Well at least people could start using it now if it returns 0, and 32/64 bit would not matter.
by jackokring
Sun Jan 31, 2016 7:55 pm
Forum: General discussion
Topic: wifi dongle
Replies: 4
Views: 667

Re: wifi dongle

The official one is out of stock in many places.
by jackokring
Thu Jan 28, 2016 2:37 am
Forum: General discussion
Topic: How large a number can a RP2 handle?
Replies: 5
Views: 814

Re: How large a number can a RP2 handle?

Mathematica accepts 2^1000 for the same result. With virtual memory the number can be very, very big, but calculation will slow substantially, just as accounting carry between digits can consume more ink. This number maximum though is far short of infinity.
by jackokring
Fri Jan 22, 2016 7:09 pm
Forum: General discussion
Topic: Block size & lots of small files
Replies: 20
Views: 4165

Re: Block size & lots of small files

You could also tar.xz your files in groups of about 100, to make 100kB files (or less), and only have 10,000 of them, and flush the 'cache' of decompressed files to keep it as small as need be.
by jackokring
Tue Jan 19, 2016 11:30 am
Forum: Troubleshooting
Topic: /dev/fb1 Non-Existent!
Replies: 12
Views: 2956

Re: /dev/fb1 Non-Existent!

is the overlay in the /boot/overlay folder?
have you added the dtoverlay= line in config.txt?
by jackokring
Fri Jan 15, 2016 2:03 am
Forum: Gaming
Topic: Other Linux based games
Replies: 12
Views: 1669

Re: Other Linux based games

Source code is critical for 'easy' building. The me4se project might be useful for many Java phone games. Almost anything C/SDL will compile, but may not run if too complex. For simple games, a rewrite may be necessary if they are for example written in something strange or rare.
by jackokring
Wed Jan 13, 2016 9:51 pm
Forum: General discussion
Topic: Naming Convention - rather basic question
Replies: 7
Views: 1049

Re: Naming Convention - rather basic question

+, compute or 2 means more GPIO.
compute means needs a lot of skill to use, but cheap on mass.
2 means quad core, NEON, more memory and hence faster.
B means network cable and more USB ports.
zero means small in need of connectors.
B has more memory than A (usually).
by jackokring
Wed Jan 13, 2016 8:55 pm
Forum: Troubleshooting
Topic: Jessie lite apt-get issues
Replies: 17
Views: 4333

Re: Jessie lite apt-get issues

So assuming an update without an upgrade will leave you able, (very likely, although depends if distribution servers change), then the upgrade must be upgrading apt-get, perl or a dependency. is it possible to say n to the upgrade, but print the list of packages it wants to upgrade? Either that or s...
by jackokring
Wed Jan 13, 2016 8:39 pm
Forum: Troubleshooting
Topic: Jessie lite apt-get issues
Replies: 17
Views: 4333

Re: Jessie lite apt-get issues

The beginning of the file Carp.pm of the initial error is as follows, and a search shows 'of' is not used outside comments on my local debian linux box. package Carp; { use 5.006; } use strict; use warnings; BEGIN { # Very old versions of warnings.pm load Carp. This can go wrong due # to the circula...
by jackokring
Wed Jan 13, 2016 8:24 pm
Forum: Compute Module
Topic: Boot up time in compute module
Replies: 4
Views: 1001

Re: Boot up time in compute module

You need to 'cron' a 'sync' (with a still in 'cron' check for long 'sync' > 'cron' interval) to achieve a stable-ish shutdown. Another option is a brown out capacitor circuit to keep the pi running a few seconds while it detects and saves. Or maybe start up using a micro controller init sequence, an...
by jackokring
Wed Jan 13, 2016 8:12 pm
Forum: Troubleshooting
Topic: Jessie lite apt-get issues
Replies: 17
Views: 4333

Re: Jessie lite apt-get issues

looks like the output is due to the 'vim' package, having a bad script in. (This is an educated guess). Did you update and upgrade first?
by jackokring
Mon Jan 11, 2016 6:46 pm
Forum: General discussion
Topic: We're recruiting!
Replies: 52
Views: 5129

Re: We're recruiting!

It is just location.
by jackokring
Mon Jan 11, 2016 5:00 pm
Forum: Troubleshooting
Topic: Connecting Arduino clone to Raspberry Pi CH340G chipset
Replies: 16
Views: 9163

Re: Connecting Arduino clone to Raspberry Pi CH340G chipset

Removing some /boot/cmdline.txt references, and a bit of raspi-config fiddling should free the serial. And you might need to disconnect the signals from the "atmel" TX and RX pins from the serial to USB chip. And pay attention to not connecting 5v to 3.3v maximum voltage pins.
by jackokring
Mon Jan 11, 2016 2:19 pm
Forum: Official Foundation Display
Topic: are there any smaller official displays planned?
Replies: 12
Views: 1407

Re: are there any smaller official displays planned?

the 3.5" waveshare works fine with the "waveshare35a-overlay.dtb" file from github. The DVD supplied is not needed. I haven't tested the touch screen yet, but con2fbmap works, and I'm waiting on wifi dongle to apt-get fbcp.
by jackokring
Sun Jan 10, 2016 4:52 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Bootloader control GPIO output
Replies: 5
Views: 1055

Re: Bootloader control GPIO output

From what I understand, the best you can do is make a dtb overlay to 'fix' the pin before loading the driver. but this still takes some time to enable, and if wait for network is selected, all bets are off, or maybe not, ...
by jackokring
Mon Jan 04, 2016 12:19 pm
Forum: Raspbian
Topic: Wifi-config app/icon missing under Jessie
Replies: 4
Views: 1265

Re: Wifi-config app/icon missing under Jessie

https://en.wikipedia.org/wiki/Mouse_keys for a mouse simulation using the keyboard.
by jackokring
Mon Jan 04, 2016 12:15 pm
Forum: General discussion
Topic: Keep time: leap second?
Replies: 11
Views: 1706

Re: Keep time: leap second?

I'm for losing leap seconds and moving the meridian ... :D

Long live UTC
by jackokring
Sun Jan 03, 2016 5:13 pm
Forum: Android
Topic: Android Board Hat
Replies: 16
Views: 2379

Re: Android Board Hat

HDMI Android dongle with builtin WiFi?
by jackokring
Sun Jan 03, 2016 5:05 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: Optional interfaces (I2C, I2S, SPI) and Device Tree
Replies: 127
Views: 83717

Re: Optional interfaces (I2C, I2S, SPI) and Device Tree

Excellent, a GPIO27 select muxed UART should be easy, as the protocols can be ACK/NAK based, and switching is easy without adapting the driver. :D
by jackokring
Sun Jan 03, 2016 4:40 pm
Forum: Other projects
Topic: No HAT screen please! (Help)
Replies: 10
Views: 1469

Re: No HAT screen please! (Help)

26 way connectors female to male should work with many cheap tiny screens. The connector and header dimensions may be an issue, solved with delicate soldering perhaps, and some wobbly warranty waiving. So will your 'void' jacket do be doing cat5?
by jackokring
Sun Jan 03, 2016 3:02 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: Optional interfaces (I2C, I2S, SPI) and Device Tree
Replies: 127
Views: 83717

Re: Optional interfaces (I2C, I2S, SPI) and Device Tree

I have a bugblat fpga, and want to put a waveshare lcd on the extra header. I can route gpio cs to cs pin positions on the expansion connector. /dts-v1/; /plugin/; / { compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709"; [email protected] { target = <&spi0>; frag0: __overlay__ { #ad...
by jackokring
Sun Jan 03, 2016 2:12 pm
Forum: General discussion
Topic: Pi Zero Availability
Replies: 83
Views: 12228

Re: Pi Zero Availability

As a pound shop USB hub will handle a WiFi dongle, a keyboard, a mouse and a thumb drive, it is as pointed out the monitor which is the problem. Some of the LCD 3.5" GPIO based ones are cheap, but the environment is not sufficiently 'shrunk' to fit on this superlative 480*320 compared to the '80s TV...
by jackokring
Sun Jan 03, 2016 1:32 pm
Forum: Add-ons
Topic: 3.5" Touch Screen TFT LCD RPi B+
Replies: 10
Views: 41094

Re: 3.5" Touch Screen TFT LCD RPi B+

https://github.com/swkim01/waveshare-dt ... verlay.dts is the overlay for waveshare 3.5", but I'm not sure if it's in the overlays provided as default. Check in the overlays folder of the boot partition. It also needs to be setup in a config file.

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