LeafLabs Garden » Topic: tone()

LeafLabs Garden » Topic: tone() http://forums.leaflabs.com/topic.php?id=1291 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:07:07 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php manitou on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-20767 Sun, 04 Nov 2012 10:26:47 +0000 manitou 20767@http://forums.leaflabs.com/ Here is v2 of a snippet of code for tone that follows the Arduino implementation more closely. It uses a timer/interrupt and any digital pin. It also uses the funky duration logic of Arduino. <pre><code>volatile static int toggle_count=0; static int tone_pin; HardwareTimer timer(2); // freq in Hz duration in ms void tone(int pin, int frequency, int duration) { timer.pause(); pinMode(pin,OUTPUT); tone_pin = pin; if (duration > 0 ) toggle_count = 2 * frequency * duration / 1000; else toggle_count = -1; // timer.setPeriod(2*1000000/freq); // in microseconds timer.setPrescaleFactor(CYCLES_PER_MICROSECOND); // microseconds timer.setOverflow(1000000/frequency/2); timer.setChannel1Mode(TIMER_OUTPUT_COMPARE); timer.setCompare(TIMER_CH1, 1); // Interrupt 1 count after each update timer.attachCompare1Interrupt(handler_tone); timer.refresh(); // start it up timer.resume(); } void noTone(int pin) { timer.pause(); digitalWrite(pin,LOW); } // ISR void handler_tone(void) { if (toggle_count != 0){ togglePin(tone_pin); if (toggle_count > 0) toggle_count--; } else noTone(tone_pin); }</code></pre> manitou on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-11191 Sat, 09 Jun 2012 20:11:48 +0000 manitou 11191@http://forums.leaflabs.com/ Note that the pin/timer/channel mappings differ based on the version of Maple you are using. My example was for an RET6. Check the pin mappings for your Maple model. (As noted, a more robust version of tone() could use the pin number to look up the timer/channel ....) compuslave on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-11183 Sat, 09 Jun 2012 07:53:25 +0000 compuslave 11183@http://forums.leaflabs.com/ Thanks for the code snippet, gbulmer. It would not build, though. I have been pretty busy/preoccupied lately as my wife and I's home burnt. We live in a motorhome, so it doesn't take much of a fire to set you back lol. Once we get our new living quarters, I'll be back on it, though. Thanks again! manitou, great info, thanks! I'll try this as well. I'm not sure why I have become so side tracked by a homegrown tone() function, but I have. I bet one thing for sure, when it's all done and tone() works, I'll know more about this board than when I started and I'll know things I doubt I would have learned doing any other project. Anyway, thanks guys! I didn't just leave, just been busy with thangs. manitou on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10940 Mon, 28 May 2012 18:17:36 +0000 manitou 10940@http://forums.leaflabs.com/ You chose to define TonePin as 9. That won't work. it has to be pin 24 so that the timer channel matches up with the pin. You can choose another pin, but you'll need to look up the associated timer and channel and modify Tone() accordingly. gbulmer on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10895 Sat, 26 May 2012 19:28:51 +0000 gbulmer 10895@http://forums.leaflabs.com/ Have you tested the pin+speaker to prove it works? For example: <pre><code>void loop() { pinMode(TonePin,OUTPUT); for (int i=100; i<1000; i+= 50) { for (int j=0; j<500; j++) { digitalWrite(TonePin, HIGH); delayMicroseconds(i); digitalWrite(TonePin, LOW); delayMicroseconds(i); } } }</code></pre> Does that make a falling tone? (WARNING: That code is not tested, or even compiled) compuslave on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10876 Fri, 25 May 2012 18:42:54 +0000 compuslave 10876@http://forums.leaflabs.com/ Well I tried a speaker, same thing. One tone no matter what I change. Changing pins changes the tone a little, but nothing huge. I have changed everything I can think of to make it sound different, and nothing. Duration variable seems useless as well. The pin variable is the only one that makes any change. Thanks for your help, though. compuslave on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10874 Fri, 25 May 2012 17:28:00 +0000 compuslave 10874@http://forums.leaflabs.com/ I suspected that may be the case and it appears so. <a href="http://www.radioshack.com/product/index.jsp?productId=2062397" rel="nofollow">http://www.radioshack.com/product/index.jsp?productId=2062397</a> Thanks for your help mikep on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10873 Fri, 25 May 2012 16:59:37 +0000 mikep 10873@http://forums.leaflabs.com/ Do you have a link to the RadioShack part? Most piezo's have the tone generator built in, they run off DC, and have a constant frequency. So you won't hear any change in tone with those. Also, piezos have usually a limited frequency range. You need a real speaker like this: <a href="http://www.radioshack.com/product/index.jsp?productId=2062406" rel="nofollow">http://www.radioshack.com/product/index.jsp?productId=2062406</a> But don't hook it up the to the Maple directly, 8 Ohm resistance is too much current to handle for the maple, you need a transistor in between to amplify the Maple output current. compuslave on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-10860 Thu, 24 May 2012 22:44:32 +0000 compuslave 10860@http://forums.leaflabs.com/ The only speaker I have is one of those 0-30V piezos from radio shack. I get the same tone, same duration no matter what I do with the variables. Hints? The sketch [quote] // for maple pwm pins associated with specific timer/channel // pin 24 timer 4 channel 4 #define TonePin 9 #define DUTY 2 //2 50% 4 25% hi HardwareTimer timer(4); void setup() { } // freq in Hz duration in ms void tone(int pin, int freq, int duration) { timer.pause(); pinMode(pin,PWM); timer.setPrescaleFactor(72); // microseconds timer.setOverflow(1000000/freq); timer.setMode(TIMER_CH4,TIMER_PWM); timer.setCompare(TIMER_CH4,1000000/freq/DUTY); timer.setCount(0); // probaby doesn't matter timer.refresh(); // start it up timer.resume(); delay(duration); timer.pause(); } void loop(){ tone(9, 2000, 200); delay(500); } [/quote] gbulmer on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-9815 Sun, 18 Mar 2012 14:47:39 +0000 gbulmer 9815@http://forums.leaflabs.com/ feurig - strongly agree with you. A few 'Goldilocks' examples (not too big, not too small, not too hard, not too easy :-) that do interesting things motivate learning. good += HUGE_GOODNESS feurig on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-9006 Sat, 17 Mar 2012 01:37:32 +0000 feurig 9006@http://forums.leaflabs.com/ Thats a lot nicer than arduino/wirings tone which arbitrarily steals timer resources in the background. I think examples like this which are small enough though still requiring a little work to understand are vastly better than everything hidden. ++good. poslathian on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-8654 Thu, 15 Mar 2012 13:47:29 +0000 poslathian 8654@http://forums.leaflabs.com/ manitou, nice! hardware tone() is the way to go. manitou on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-8592 Mon, 12 Mar 2012 13:49:10 +0000 manitou 8592@http://forums.leaflabs.com/ Here's a snippet of code for tone() that I used to test some of the arduino sketches on the RET6. A more general version would check that pin provided is PWM and then lookup the corresponding timer/channel <pre><code>// for maple pwm pins associated with specific timer/channel // pin 24 timer 4 channel 4 #define TonePin 24 #define DUTY 2 //2 50% 4 25% hi HardwareTimer timer(4); // freq in Hz duration in ms void tone(int pin, int freq, int duration) { timer.pause(); pinMode(pin,PWM); timer.setPrescaleFactor(72); // microseconds timer.setOverflow(1000000/freq); timer.setMode(TIMER_CH4,TIMER_PWM); timer.setCompare(TIMER_CH4,1000000/freq/DUTY); timer.setCount(0); // probaby doesn't matter timer.refresh(); // start it up timer.resume(); delay(duration); timer.pause(); }</code></pre> gbulmer on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-7812 Fri, 20 Jan 2012 14:44:48 +0000 gbulmer 7812@http://forums.leaflabs.com/ kenji - you could try to use the timer setPeriod function described at <a href="http://leaflabs.com/docs/lang/api/hardwaretimer.html#lang-hardwaretimer" rel="nofollow">http://leaflabs.com/docs/lang/api/hardwaretimer.html#lang-hardwaretimer</a> with setCount. there are multiple timers, so you could have independent tones (one frequency per timer) on different pins. kenji on "tone()" http://forums.leaflabs.com/topic.php?id=1291#post-7798 Thu, 19 Jan 2012 20:14:47 +0000 kenji 7798@http://forums.leaflabs.com/ Hi, when implement tone() Schedule? Thanks