Search found 19 matches
- Sat Nov 15, 2014 12:09 pm
- Forum: Bare metal, Assembly language
- Topic: native GBA games
- Replies: 8
- Views: 3546
Re: native GBA games
Thanks for the reply, this at least gives me new search terms to expand my knowledge with :D I think there's a lot of value in studying Nintendo's approach to handhelds. Using older, thoroughly understood hardware that is only just powerful enough to achieve the desired functionality is a lot like w...
- Fri Nov 14, 2014 7:02 pm
- Forum: Bare metal, Assembly language
- Topic: native GBA games
- Replies: 8
- Views: 3546
native GBA games
If this is the wrong place to bring this up, sorry!
The GameBoy Advance had an ARM CPU, an ARM7TDMI running the ARMv4 instruction set. Does that mean that the Pi could be made to run GBA roms without needing emulation?
The GameBoy Advance had an ARM CPU, an ARM7TDMI running the ARMv4 instruction set. Does that mean that the Pi could be made to run GBA roms without needing emulation?
- Tue Jun 25, 2013 8:42 pm
- Forum: Media centres
- Topic: XBMC OpenELEC and LCD HD44780 via GPIO
- Replies: 108
- Views: 86911
Re: XBMC OpenELEC and LCD HD44780 via GPIO
Bit late to the party. I was running RaspBMC, but openelec performs way better for me. I used the tutorial on Techfruit to get my LCD working on RaspBMC. Is there any word on using the methods outlined in this thread to get a 20x4 screen working in OpenElec (patch, compile etc.)? Someone mentioned o...
- Tue Jun 25, 2013 11:39 am
- Forum: Beginners
- Topic: SD card troubles
- Replies: 13
- Views: 1722
Re: SD card troubles
I could maybe try an old ATX supply for reference, but I don't really feel like hooking it up. I don't know if those things can stabilise their output with such a small load anyway.
- Tue Jun 25, 2013 11:26 am
- Forum: Beginners
- Topic: SD card troubles
- Replies: 13
- Views: 1722
Re: SD card troubles
Okay, wow. The lables indeed mean nothing. So I tested at the GPIO pins 2 and 9, I don't have convenient probes to get at the test points but it seemed to give the same result. The multimeter I used I know to be accurate, but the way I've got it hooked up might give lower-than-actual reads, so I'm j...
- Tue Jun 25, 2013 9:58 am
- Forum: Beginners
- Topic: SD card troubles
- Replies: 13
- Views: 1722
Re: SD card troubles
The supply is rated at 5V. It might go a little lower, but not that much I think. Besides, wouldn't the pi just switch off if the voltage dropped too much? I'll check anyway, thanks.
- Tue Jun 25, 2013 9:48 am
- Forum: Beginners
- Topic: SD card troubles
- Replies: 13
- Views: 1722
Re: SD card troubles
Power supply is a 3 amp one, so that shouldn't be the problem. I've been using the same supply for the other pi with no problems. Same goes for the hdmi, keyboard.
- Mon Jun 24, 2013 6:34 pm
- Forum: Beginners
- Topic: SD card troubles
- Replies: 13
- Views: 1722
SD card troubles
My roommate and I recently bought Pis (my second). Mine seems to be busted though; we have tried the following SD cards, installing the 25-5-2013 Raspbian Wheezy image (each several times, these results seem fairly consistent): SanDisk extreme pro cl. 10, 32 GB... image never makes it into the first...
- Sun Apr 14, 2013 4:16 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
I'm confused, ErikH. Did you do this already, or was it a suggestion I might try?
I've moved to using a teensy, a microcontroller that can emulate a USB keyboard. Works quite well, but it is extra hardware.
I've moved to using a teensy, a microcontroller that can emulate a USB keyboard. Works quite well, but it is extra hardware.
- Thu Jan 31, 2013 8:26 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
So that the python app will notify the xbmc script when a button is pressed, basically? Yeah that might be the way to go.
- Thu Jan 31, 2013 2:26 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
Looks like my problem has to do with what permissions xbmc has; it hasn't got root permission, which means it can't access the gpio. On the openelec forum, someone used this as a solution: I have one script called pwroff.py: import subprocess import xbmc xbmc.executebuiltin( "SetVolume(1,True)&...
- Fri Jan 25, 2013 10:53 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
Yeah, their forum hasn't been any help so far. Python version seems to be okay; all 2.x. I think the problem is that XBMC wants you to install additional Python modules in a specific folder (i.e., ~/.xbmc/scripts/python/Lib). If you install the RPi.GPIO module (with apt-get or 'python setup.py insta...
- Fri Jan 25, 2013 11:11 am
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
No, I'm not sure. I don't know about IDLE. There's very little info about what xbmc actually uses to do python, and there isn't anything I can do from within the XBMC gui except see what addons are installed. On their wiki, it says that its python interpreter is based on Python 2.4, which is definit...
- Fri Jan 25, 2013 12:37 am
- Forum: Media centres
- Topic: How to install raspi-config on rasbmc?
- Replies: 1
- Views: 2196
Re: How to install raspi-config on rasbmc?
You can install character sets from within XBMC settings, or in the command line the first time you run a command line or ssh shell in raspbmc. I tried to install raspi-config on raspbmc and it broke the system. It seemed like it created conflicts between different configuration apps.
- Fri Jan 25, 2013 12:29 am
- Forum: Media centres
- Topic: The Ultimate Raspbmc Performance Options?
- Replies: 2
- Views: 5255
Re: The Ultimate Raspbmc Performance Options?
Can't really help you with the NAS stuff, but I've been doing a little overclocking while having raspbmc on there. These are the highest settings I could get without stability issues or corrupting the SD card (16GB samsung class 10 BTW, YMMV) (my pi is a 512MB with samsung RAM, which some say is bet...
- Thu Jan 24, 2013 11:51 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
Thanks, good advice. The GPIO part works fine (from the ssh command line), like this: import RPi.GPIO as GPIO import time GPIO.setmode(BCM) GPIO.setup(22, GPIO.IN) while True: if ( GPIO.input(22) == False ) print("Button pressed") time.sleep(0.2); #so I don't have to keep it pressed for to...
- Wed Jan 23, 2013 10:53 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
Re: turning gpio buttons into keys
Thanks for the replies, the info might be useful. I'm using raspbmc. XBMC has its own python interpreter as it turns out, and the whole system seems to be rather particular about how you add functionality. I'm still not entirely sure what is easier; trying to use the xbmc stuff, or trying to work ar...
- Sat Jan 12, 2013 3:18 pm
- Forum: General discussion
- Topic: What's the simple and safe way to do a "shutdown" button?
- Replies: 60
- Views: 71070
Re: What's the simple and safe way to do a "shutdown" button
I've been looking to do something similar; I want to use gpio buttons to navigate through raspbmc. Any ideas on how to do that?
- Fri Jan 11, 2013 11:24 pm
- Forum: Python
- Topic: turning gpio buttons into keys
- Replies: 31
- Views: 16481
turning gpio buttons into keys
Hello, I'm a complete newb to programming, and I think I've bitten off more than I can chew. I'm using my Pi as a media center, and I wanted to install some basic hardware controls on the casing. Now, from various tutorials I've gotten as far as this: #!/usr/bin/env python from time import sleep imp...