http://forums.leaflabs.com/topic.php?id=899 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:09:19 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=899#post-9816 Sun, 18 Mar 2012 14:50:18 +0000 feurig 9816@http://forums.leaflabs.com/ <p>Sort of. </p> <p>In addition to the difference between the way wiring prints chars versus uint8s.</p> <p><a href="http://code.google.com/p/maple-sdfat/issues/detail?id=1" rel="nofollow">http://code.google.com/p/maple-sdfat/issues/detail?id=1</a></p> <p>I am having issues with the hard-coded chip select remnant from the lazy coders on the arduino side. It does work as long as you are using the stock maple or ret6 and spi1, this needs to be generalized so that you can use the other variants or spi2. </p> <p><a href="http://code.google.com/p/maple-sdfat/issues/detail?id=2" rel="nofollow">http://code.google.com/p/maple-sdfat/issues/detail?id=2</a> </p> http://forums.leaflabs.com/topic.php?id=899#post-5976 Fri, 12 Aug 2011 15:04:54 +0000 betovar 5976@http://forums.leaflabs.com/ <p>Hi guys,</p> <p>i have got the SdFAT library running on maple with the sparkfun breakout board for microSD. i'd like to know two things:</p> <p>1) does anyone have any ideas for changing spi clocks while the volume is mounted? i'm able to run the FileSys code example but not change the speed that the spi reads or writes. i'm wondering if the library needs to close the volume or root file in order to end the spi and start a new one. i can't seem to find any functions for unmounting the SD card in the library so i'm assuming this isn't required.</p> <p>2) what is the progress for Riegel's SD reader, robodude? i haven't had a chance to mess around with that yet and i'd like to see what you've done before getting started.</p> <p>thanks </p> http://forums.leaflabs.com/topic.php?id=899#post-5536 Tue, 05 Jul 2011 16:29:40 +0000 poslathian 5536@http://forums.leaflabs.com/ <p>from zero to two working options...great </p> http://forums.leaflabs.com/topic.php?id=899#post-5530 Tue, 05 Jul 2011 10:18:37 +0000 robodude666 5530@http://forums.leaflabs.com/ <p>There's just something about the SdFat library that I dislike.</p> <p>I've been using Roland Riegel's <a href="http://www.roland-riegel.de/sd-reader/index.html">SD Reader</a> library with modifications for Maple with great success. I has a smaller codebase and a smaller memory footprint, not that the Maple lacks room for either.</p> <p>Haven't done any benchmarks yet, but I plan to eventually do a performance benchmark on several of the popular SD libraries.</p> <p>-robodude666 </p> http://forums.leaflabs.com/topic.php?id=899#post-5528 Tue, 05 Jul 2011 08:47:32 +0000 poslathian 5528@http://forums.leaflabs.com/ <p>this is awesome, and in perfect time that I needed this for another project. </p> <p>YES! </p> http://forums.leaflabs.com/topic.php?id=899#post-5515 Sun, 03 Jul 2011 20:20:05 +0000 pra 5515@http://forums.leaflabs.com/ <p>The little TFT LCD card from Adafruit I'm experimenting with (see other post) has a micro SD card adapter on it and one of Adafruit's sample Arduino apps for the device is to read a bitmap image from the SD card and paint it on the TFT...and Hurrah, I have got it working on the Maple, using CodeRage's SdFat library. Adafruit use their own upgraded version of the Arduino FAT library so it wasn't the easiest port in the world. For some reason they were passing a File object amongst functions, rather than a reference, and something I didn't notice when I replaced all File references with SdFile instead. The file load was failing with a bitmap error because only the throwaway object on the stack was getting its cur_position updated. Oh well! They are all easy once you've found them, aren't they!</p> <p>Interesting aside. This is a 62Kbyte image file. With the SPI clock set at 250KHz, the load and draw process took 3203 ms. Once I got it working, I kept increasing SPI hardware clock speed until the SD card failed, and that was at 9MHz. It runs reliably at 4.5MHz and the load and draw process takes 583 ms, almost 6 times quicker.</p> <p>...anyway kudos to CodeRage for his great work... </p>