http://forums.leaflabs.com/topic.php?id=1197 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:23:22 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1197#post-8405 Tue, 28 Feb 2012 02:20:18 +0000 TroyLee 8405@http://forums.leaflabs.com/ <p><a href="https://github.com/LeeTroy/ArduIMU/tree/master/libraries/HMC5883L" rel="nofollow">https://github.com/LeeTroy/ArduIMU/tree/master/libraries/HMC5883L</a></p> <p>A simple library implement for HMC5883L.</p> <p>I've tested on a teensy++. </p> http://forums.leaflabs.com/topic.php?id=1197#post-7356 Thu, 15 Dec 2011 01:13:53 +0000 Farid 7356@http://forums.leaflabs.com/ <p>thanks i will try again </p> http://forums.leaflabs.com/topic.php?id=1197#post-7316 Mon, 12 Dec 2011 18:38:18 +0000 poslathian 7316@http://forums.leaflabs.com/ <p>a lot of these accelerometer have "enable" modes such that you need to turn them on before youll get data updates. Perhaps thats whats going on here? </p> http://forums.leaflabs.com/topic.php?id=1197#post-7287 Thu, 08 Dec 2011 18:02:37 +0000 ala42 7287@http://forums.leaflabs.com/ <p>Your initialization code is a bit short. Add the initializations used in the AeroQuad code <a href="http://code.google.com/p/aeroquad/source/browse/trunk/AeroQuad/Compass.h" rel="nofollow">http://code.google.com/p/aeroquad/source/browse/trunk/AeroQuad/Compass.h</a> starting at line 200. </p> http://forums.leaflabs.com/topic.php?id=1197#post-7281 Tue, 06 Dec 2011 20:52:19 +0000 Farid 7281@http://forums.leaflabs.com/ <p>no one…… </p> http://forums.leaflabs.com/topic.php?id=1197#post-7267 Wed, 30 Nov 2011 22:45:12 +0000 Farid 7267@http://forums.leaflabs.com/ <p>The following is my code :<br /> #include &lt;Wire.h&gt;</p> <p>#define HMC5883_WriteAddress 0x1E // i.e 0x3C &gt;&gt; 1<br /> #define HMC5883_ModeRegisterAddress 0x02<br /> #define HMC5883_ContinuousModeCommand 0x00<br /> #define HMC5883_DataOutputXMSBAddress 0x03</p> <p>int outputData[6];</p> <p>void setup()<br /> { </p> <p> //SerialUSB.begin(9600);<br /> Wire.begin(); //Initiate the Wire library and join the I2C bus as a master</p> <p> Wire.beginTransmission(HMC5883_WriteAddress); //Initiate a transmission with HMC5883 (Write address).<br /> Wire.send(HMC5883_ModeRegisterAddress); //Place the Mode Register Address in send-buffer.<br /> Wire.send(HMC5883_ContinuousModeCommand); //Place the command for Continuous operation Mode in send-buffer.<br /> Wire.endTransmission(); //Send the send-buffer to HMC5883 and end the I2C transmission.<br /> delay(1000);</p> <p>}</p> <p>void loop() {</p> <p> int i,x,y,z; </p> <p> Wire.beginTransmission(HMC5883_WriteAddress); //Initiate a transmission with HMC5883 (Write address).<br /> Wire.send(HMC5883_DataOutputXMSBAddress); //select register 3, X MSB register<br /> Wire.endTransmission();</p> <p> Wire.requestFrom(HMC5883_WriteAddress,6); //Request 6 bytes of data from the address specified,2 registers per axis. </p> <p> //Read the value of magnetic components X,Y and Z</p> <p> if(6 &lt;= Wire.available()) // If the number of bytes available for reading be &lt;=6.<br /> {<br /> for(i=0;i&lt;6;i++)<br /> {<br /> outputData[i]=Wire.receive(); //Store the data in outputData buffer<br /> }<br /> }</p> <p> x=outputData[0] &lt;&lt; 8 | outputData[1]; //Combine MSB and LSB of X Data output register<br /> z=outputData[2] &lt;&lt; 8 | outputData[3]; //Combine MSB and LSB of Z Data output register<br /> y=outputData[4] &lt;&lt; 8 | outputData[5]; //Combine MSB and LSB of Y Data output register<br /> SerialUSB.print("X=");<br /> SerialUSB.print(x);<br /> SerialUSB.print(" Y=");<br /> SerialUSB.print(y);<br /> SerialUSB.print(" Z=");<br /> SerialUSB.println(z);</p> <p> delay(100);<br /> }</p> <p>But the result x y z is the same when i shake the HMC5883L-board.<br /> Is anyone who have been use this IC before can tell me what's wrong with the code ,<br /> thanks! </p>