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LeafLabs Garden » Topic: Porting Adafruit_TFTLCD to MAPLE http://forums.leaflabs.com/topic.php?id=1755 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:07:31 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php manitou on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-20171 Wed, 03 Oct 2012 17:39:02 +0000 manitou 20171@http://forums.leaflabs.com/ just standard device. ran it with both arduino and maple. on maple, touchscreen pins #define YP 18 // must be an analog pin #define XM 17 // must be an analog pin #define YM 9 // can be a digital pin #define XP 8 // can be a digital pin I also measured resistance as suggested // For better pressure precision, we need to know the resistance // between X+ and X- Use any multimeter to read it // For the one we're using, its 300 ohms across the X plate and used 361 TouchScreen ts = TouchScreen(XP, YP, XM, YM, 361); you also might also try NUMSAMPLES 1 in TouchScreen.cpp one sketch liked it at 1 another at 2 ... sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-20168 Wed, 03 Oct 2012 15:28:42 +0000 sei 20168@http://forums.leaflabs.com/ I checked my Touchshield with an arduino and it works flawlessly. But with the maple it just doesn't work. The readings don't change if I touch the screen or not and p.z is always 0. Do you have a special version of the touchshield or is it just the standard one ? sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-17118 Thu, 27 Sep 2012 03:09:40 +0000 sei 17118@http://forums.leaflabs.com/ That's nice :) Sadly I can't get it running. I suspect my Touchshield is defect, as I don't get any sane readings from the Touchscreen. So the next thing I'll do is to organize an arduino and test if the shield ist ok. manitou on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-14243 Sat, 15 Sep 2012 11:59:59 +0000 manitou 14243@http://forums.leaflabs.com/ <blockquote> Would you mind if i put a link to your github in the wiki instead of the link to the gist ? </blockquote> No problem, but give it a test flight first ... sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-14187 Sat, 15 Sep 2012 04:16:42 +0000 sei 14187@http://forums.leaflabs.com/ Hi manitou, That's great ! Thank you very much :) Would you mind if i put a link to your github in the wiki instead of the link to the gist ? Sadly I could not try your stuff yet, but i'm definitly looking forward to it ! @mbolivar & gbulmer: you are welcome :) manitou on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-13194 Wed, 05 Sep 2012 15:18:18 +0000 manitou 13194@http://forums.leaflabs.com/ I have added touchscreen support to sei's library. I didn't modify sei's lib, but the github files below are organized to be added to your maple sketchbook libraries/ folder. Touchscreen support is modification of Arduino version, mainly changing from 10-bit to 12-bit ADC. Besides the graphicstest example, I added rotationtest, tftpaint, touchscreendemo. I used sei's pin assignments, and like the Arduino, the touchscreen shares pins with the display. library files are here <a href="https://github.com/manitou48/maple-touchscreen-libs" rel="nofollow">https://github.com/manitou48/maple-touchscreen-libs</a> sei's implementation is faster (graphicstest) than Arduino. <pre><code>test Arduino Maple (time in ms) testttext 843 323 testlines 15090 8994 testfastlines 979 340</code></pre> mbolivar on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-11097 Wed, 06 Jun 2012 03:15:57 +0000 mbolivar 11097@http://forums.leaflabs.com/ sei: <blockquote> @mbolivar I've just made an entry to the supported Shields page. </blockquote> thanks! gbulmer on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-11007 Thu, 31 May 2012 13:37:41 +0000 gbulmer 11007@http://forums.leaflabs.com/ sei - thank you for taking the comments as constructive. I'm glad they were helpful. sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-10981 Wed, 30 May 2012 13:39:47 +0000 sei 10981@http://forums.leaflabs.com/ @gbulmer It's been a while since the last time I coded in C, also I think i never really used defines, so thanks for your remark! I definitly learned something :) @mikep I'll put up a new thread in the next minutes ;) mikep on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755&page=2#post-10980 Wed, 30 May 2012 13:01:19 +0000 mikep 10980@http://forums.leaflabs.com/ @sei It would be great if you get the ITead display to work, I have one of them laying around there too somewhere :). Would be nice to put it to use. Let us know how it goes. Mike gbulmer on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755#post-10969 Tue, 29 May 2012 16:12:44 +0000 gbulmer 10969@http://forums.leaflabs.com/ I had a look at the code at <a href="https://gist.github.com/2728041" rel="nofollow">https://gist.github.com/2728041</a> May I make some comments? It contains code which breaks a common C convention. A macro definition does not follow C syntax. It is a textual replacement, applied to the C source by the 'pre-processor' before the C compiler proper parses the text. A macro definition is terminated by a 'raw' (not escaped) newline, and not a ';'. So a macro would normally be defined as, e.g; <code>#define RD_LOW GPIOC->regs->BRR = RD_bit</code> or better still: <code>#define RD_LOW (GPIOC->regs->BRR = RD_bit)</code> (In C, most things are expressions (not statements), so a macro which is within <code>(...)</code> is handy because the value can be used as part of any expression, including a parameter to a function, or in a control statement like an <code>if</code>, <code>for</code>, <code>while</code>, <code>switch</code>.) Defining a macro with ';' at the end includes the ';' in the source text that the C compiler parses, every place the macro is used. So <code>#define RD_LOW GPIOC->regs->BRR = RD_bit;</code> would include the text ';' wherever the name RD_LOW is used. Summary: As a rule-of-thumb, C programmers don't define macro's (#define ...) with their own ';' statement terminator. Where practical, macro replacement text is a normal C expression, with <code>(...)</code> around it (or a single function call). We use the normal statement terminator ';' after each expression in the body of the C code, where the macro is used. So macro's don't contain a terminating ';'. An expression-terminating ';' (or separating ',' or other operator) is supplied where the macro is used. Examples of macro's which have the extra ';' <pre><code>#define RD_OUTPUT gpio_set_mode(GPIOC, RD, GPIO_OUTPUT_PP ); #define RD_LOW GPIOC->regs->BRR = RD_bit;</code></pre> Then it is used: <pre><code>// .... WR_LOW WR_HIGH write8(data&0xff); WR_LOW WR_HIGH</code></pre> Their are a bunch of reasons the terminating ';' is not included in the macro. For example: a. code does not look like C. It looks like a language which might use new-line as a statement terminator, which is distracting to a C programmer. It causes me to go read the macro's to see why the code looks un-C-like, which isn't necessary. b. syntax-aware tools might get confused by the lack of ';', and using text search tools like grep, may become awkward. c. some statements, start to look weird, or become impossible. For example: <code>for (RD_LOW,i=0; i<10; i++, WR_HIGH)</code> is a non-starter. Yet, there is no need to constrain the way someone else can write code. d. it isn't possible to grab the side-effect of a statement and use it's value in a function call, or within an expression. For example, I might want to: <code>SerialUSB.print(RD_LOW);</code> but that won't work. These are tiny little constraints which are easily avoided by removing the ';' from the macro. When the ';' is removed, the code looks like C, and the macro's can be used in 'normal' expressions as easily as '1'. I'd recommend removing the ';' from the macro definitions, e.g.: <pre><code>#define RD_OUTPUT gpio_set_mode(GPIOC, RD, GPIO_OUTPUT_PP) #define RD_LOW (GPIOC->regs->BRR = RD_bit)</code></pre> and write the code as: <pre><code>//... WR_LOW; WR_HIGH; write8(data&0xff); WR_LOW; WR_HIGH;</code></pre> I hope that is helpful. sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755#post-10966 Tue, 29 May 2012 12:01:53 +0000 sei 10966@http://forums.leaflabs.com/ Thanks for posting your code, I'll definitly have a look at it ! blackswords on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755#post-10910 Sun, 27 May 2012 14:46:41 +0000 blackswords 10910@http://forums.leaflabs.com/ I adapted a library to Maple for a similar <a href="http://www.ebay.com/itm/3-2-TFT-LCD-Module-Display-Touch-Panel-PCB-adapter-/190451748066?pt=LH_DefaultDomain_0&hash=item2c57cf0ce2">screen</a>, check it out, it can helps. there is the headers : <a href="http://pastebin.com/CrtbsKrR">LCD</a> and <a href="http://pastebin.com/y2UD6LFP">ASCIILib</a> and the sources : <a href="http://pastebin.com/6yHKTP4X">LCD</a> and <a href="http://pastebin.com/Nb8FD5Hj">ASCIILib</a> I just have some problems with the backlight dimming, I'll fix it later All is defined as static so it should be used like this : LCD::LCD(); // Init LCD::Clear(Black); // Set the all screen black LCD::WriteText(10,10,"Hello World",Green,Black); // Write some text to sei on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755#post-10907 Sun, 27 May 2012 14:25:35 +0000 sei 10907@http://forums.leaflabs.com/ @mbolivar I've just made an entry to the supported Shields page. @pici That's nice to hear :) I also tried to get the touchscreen to work but that seems to be pretty difficult because it shares pins with the TFT. So for now I'll go on with a different project, porting the Itead ITDB02-3.2WD to Maple. mbolivar on "Porting Adafruit_TFTLCD to MAPLE" http://forums.leaflabs.com/topic.php?id=1755#post-10880 Fri, 25 May 2012 22:21:22 +0000 mbolivar 10880@http://forums.leaflabs.com/ that's cool! why don't you put it on the <a href="http://wiki.leaflabs.com">wiki</a>?