http://forums.leaflabs.com/topic.php?id=1406 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:06:27 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1406&page=2#post-27111 Fri, 21 Jun 2013 07:48:11 +0000 alton 27111@http://forums.leaflabs.com/ <p>I really like your way of expressing the opinion and sharing the information. </p> http://forums.leaflabs.com/topic.php?id=1406#post-22334 Sat, 09 Feb 2013 18:46:00 +0000 crenn 22334@http://forums.leaflabs.com/ <p>Last I heard it was Europe only for the moment, but I have a Model A on the shopping list, should be 1/3rd of the power consumption compared to the Model B. </p> http://forums.leaflabs.com/topic.php?id=1406#post-22329 Sat, 09 Feb 2013 08:55:49 +0000 gbulmer 22329@http://forums.leaflabs.com/ <p>Presumably folks have noticed that Raspberry-Pi Model A is available, for example:<br /> <a href="http://uk.rs-online.com/web/p/processor-microcontroller-development-kits/7568317/" rel="nofollow">http://uk.rs-online.com/web/p/processor-microcontroller-development-kits/7568317/</a><br /> <a href="http://downloads.element14.com/raspberryPi1.html?isRedirect=true" rel="nofollow">http://downloads.element14.com/raspberryPi1.html?isRedirect=true</a></p> <p>It has no Ethernet, only 1 USB, and only 256MB of RAM (vs R-Pi B), But that is a lot of computer for the price. </p> http://forums.leaflabs.com/topic.php?id=1406#post-22327 Sat, 09 Feb 2013 04:46:22 +0000 crenn 22327@http://forums.leaflabs.com/ <p>It's been a while, but thought I might drop this link of EEVBlog's latest video here as it features my Raspbian Rover and both my Maples.</p> <p><a href="http://www.youtube.com/watch?v=zhVpdQPbji0" rel="nofollow">http://www.youtube.com/watch?v=zhVpdQPbji0</a> </p> http://forums.leaflabs.com/topic.php?id=1406#post-20186 Thu, 04 Oct 2012 09:03:06 +0000 crenn 20186@http://forums.leaflabs.com/ <p>And a light update, this is what it's upto now:<br /> <a href="http://i3.photobucket.com/albums/y81/crenn/Projects/RaspPi/121004/IMG_1812.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/Projects/RaspPi/121004/IMG_1812.jpg</a></p> <p>Tomorrow it gets integrated with a robot base. </p> http://forums.leaflabs.com/topic.php?id=1406#post-12144 Wed, 01 Aug 2012 08:18:53 +0000 crenn 12144@http://forums.leaflabs.com/ <p>Raspberry Pi Code:<br /> <a href="http://www.crennsmind.com/Code/RPi/SPI/spimapleLCD.c" rel="nofollow">http://www.crennsmind.com/Code/RPi/SPI/spimapleLCD.c</a><br /> Maple Mini Code:<br /> <a href="http://www.crennsmind.com/Code/Maple/SPI-Slave/SPI_Slave_LCD.pde" rel="nofollow">http://www.crennsmind.com/Code/Maple/SPI-Slave/SPI_Slave_LCD.pde</a></p> <p>Enjoy!</p> <p>The code will be further commented tomorrow. </p> http://forums.leaflabs.com/topic.php?id=1406#post-12143 Wed, 01 Aug 2012 03:16:48 +0000 crenn 12143@http://forums.leaflabs.com/ <p>Today I've gotten the Raspberry Pi and the Leaflabs Maple Mini talking over SPI, I've had a few issues doing it; involving what I believe is cross talk (not too surprising considering the long wires), also the RPi library I'm using makes the SPI pins into input after the program finishes (worked around the problem by using pull-up and pull-down resistors in the Maple) and also working out which has the problem, the program on the RPi or the program on the Maple.</p> <p>Either way, the initial test was to just get a byte sent to the Maple from the RPi and then for a byte to be returned from the Maple for the RPi to display. Apart from the cross talk and 'input issues' it wasn't too hard.</p> <p>Then I worked on getting the RPi to send a string via SPI to the Maple. I did this with the first byte telling the Maple that this is the 'command' and to expect more data and waits for data to arrive (checking if the CS/NSS pin has gone to the idle position to mark the end of the data transfer) and then outputs the data received via SerialUSB. After I got that working (with some timing issues which are still present), I hooked up an LCD to the Maple Mini and got the text to be output to that as well (and discovered that this LCD module doesn't like running on 3.3V). The program on the Maple will either output a default string, "Hello World", or you can pass a string to the program to get it working.</p> <p>I'll have code posted in a couple of hours for both the Maple and the Raspberry Pi. </p> http://forums.leaflabs.com/topic.php?id=1406#post-11027 Fri, 01 Jun 2012 09:49:01 +0000 crenn 11027@http://forums.leaflabs.com/ <p>I'll just post a quick update here. It's almost 1AM. After finally getting the Pi working with the SD card I had purchased last week for it (was forced to get a monitor for it, and the only monitor with HDMI isn't close, so a 5m HDMI cable was used xD) I'm now ready to start playing around with the Pi and attempting to access the Maple via SPI. Sadly, I'm tired and have things to do in the morning, but updates will occur tomorrow!</p> <p>Also, if you get a Pi and the image hasn't been updated yet, look into this thread:<br /> <a href="http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&amp;t=6093" rel="nofollow">http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&amp;t=6093</a></p> <p>There is 2 files that need to be replaced to get it working with certain SD cards. </p> http://forums.leaflabs.com/topic.php?id=1406#post-11009 Thu, 31 May 2012 16:55:58 +0000 crenn 11009@http://forums.leaflabs.com/ <p>Well, I can confirm that SPI can successfully communicate with a ATMega168 since it was acting as a port expander essentially. I'll have to look into the Arduino IDE running on the RPi.</p> <p>It will definately be interesting if someone can do that! But it would require knowledge of the STK500 proticol. </p> http://forums.leaflabs.com/topic.php?id=1406#post-11004 Thu, 31 May 2012 13:20:06 +0000 gbulmer 11004@http://forums.leaflabs.com/ <p>I got mine last week, but I'm doing some work which will keep me busy until next week. </p> <p>I proposed SPI and an ATmega on some of the 'physical computing' threads at the R-Pi forum last year, so I'd be interested in how well it works. </p> <p>The reason to use SPI to an ATmega is more than a fast comms. mechanism.<br /> ATmega's are <strong>programmed</strong> over SPI, so no need for a pre-programmed bootloader. just a raw ATmega, straight from the shop.</p> <p>Someone seems to have the Arduino IDE running on the Raspberry Pi<br /> <a href="http://raspberrypi.homelabs.org.uk/raspberrypi-the-arduino-development-tool/" rel="nofollow">http://raspberrypi.homelabs.org.uk/raspberrypi-the-arduino-development-tool/</a></p> <p>Instead of uploading over USB, it'd need to modify the upload on the R-Pi, to upload programs straight into the ATmega.<br /> Once loaded the Arduino program could use SPI to communicate with the R-Pi.<br /> No need for an Arduino USB to serial. Just a 'naked' ATmega. So the board and components would be about £6. </p> http://forums.leaflabs.com/topic.php?id=1406#post-11000 Thu, 31 May 2012 10:08:12 +0000 juzza_s 11000@http://forums.leaflabs.com/ <p>SPI. Interesting . . . . I like it! </p> <p>Now you've given me food for thought! :) </p> http://forums.leaflabs.com/topic.php?id=1406#post-10998 Thu, 31 May 2012 07:40:10 +0000 crenn 10998@http://forums.leaflabs.com/ <p>I've been planning on using the SPI interface for a while and assisted someone test a SPI module with a ATMega168 :D </p> http://forums.leaflabs.com/topic.php?id=1406#post-10994 Thu, 31 May 2012 05:47:53 +0000 juzza_s 10994@http://forums.leaflabs.com/ <p>Well, the Raspberry PI has 8x GPIO, I2C, SPI and a UART, so it shouldn't be a problem for the two boards to chat to each other.</p> <p><a href="http://elinux.org/RPi_Low-level_peripherals" rel="nofollow">http://elinux.org/RPi_Low-level_peripherals</a></p> <p>Now to decide what interface to use. :-)</p> <p>I'll be interested to know how you get on, because my project will have a similar setup when I get my RPi. </p> http://forums.leaflabs.com/topic.php?id=1406#post-10991 Thu, 31 May 2012 03:18:19 +0000 crenn 10991@http://forums.leaflabs.com/ <p>And to dig up a really old topic, I got mine today! Can't play with it until tomorrow night, but I'll be seeing if I can't pair it up with a nice Maple ;D</p> <p>As for why I can't play with it.... 2 exams within hours of each other. Fun. </p> http://forums.leaflabs.com/topic.php?id=1406#post-8476 Sat, 03 Mar 2012 05:43:39 +0000 crenn 8476@http://forums.leaflabs.com/ <p>I ordered my Raspberry Pi a couple of days ago, as well as some other SMD components for a different project. Looking forward to having a play with it, and would love it if I can get it working with a Maple (not via the USB port) so that I can use the peripherals of the Maple with the 'grunt' of the RPi.</p> <p>At a later stage, I might be getting a couple of the Pis (Model A) ;D </p>