Diff: HMC5843.cpp

Revision:

0:03b72060cd83

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HMC5843.cpp	Fri Oct 07 21:06:52 2011 +0000
@@ -0,0 +1,176 @@
+/**
+ * @author Jose R. Padron
+ * @author Used HMC6352 library  developed by Aaron Berk as template
+ * @section LICENSE
+ *
+ * Copyright (c) 2010 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @section DESCRIPTION
+ *
+ * Honeywell HMC5843digital compass.
+ *
+ * Datasheet:
+ *
+ * http://www.ssec.honeywell.com/magnetic/datasheets/HMC5843.pdf
+ */
+
+/**
+ * Includes
+ */
+#include "HMC5843.h"
+
+HMC5843::HMC5843(PinName sda, PinName scl) {
+
+    i2c_ = new I2C(sda, scl);
+    //100KHz, as specified by the datasheet.
+    i2c_->frequency(100000);
+
+
+}
+
+
+void HMC5843::write(int address, int data) {
+   
+    char tx[2];
+   
+    tx[0]=address;
+    tx[1]=data;
+
+    i2c_->write(HMC5843_I2C_WRITE,tx,2);
+   
+    wait_ms(100);
+
+}
+
+
+void HMC5843::setSleepMode() {
+    
+    write(HMC5843_MODE, HMC5843_SLEEP);
+}
+
+void HMC5843::setDefault(void) {
+   
+   write(HMC5843_CONFIG_A,HMC5843_10HZ_NORMAL);
+   write(HMC5843_CONFIG_B,HMC5843_1_0GA);
+   write(HMC5843_MODE,HMC5843_CONTINUOUS);
+   wait_ms(100);
+}
+
+
+void HMC5843::getAddress(char *buffer) {
+    
+   char rx[3];
+   char tx[1];
+   tx[0]=HMC5843_IDENT_A;
+    
+       
+    i2c_->write(HMC5843_I2C_WRITE, tx,1);
+   
+    wait_ms(1);
+    
+    i2c_->read(HMC5843_I2C_READ,rx,3);
+    
+    buffer[0]=rx[0];
+    buffer[1]=rx[1];
+    buffer[2]=rx[2];
+}
+
+
+
+void HMC5843::setOpMode(int mode, int ConfigA, int ConfigB) {
+    
+    
+    write(HMC5843_CONFIG_A,ConfigA);
+    write(HMC5843_CONFIG_B,ConfigB);
+    write(HMC5843_MODE,mode);
+    
+
+}
+
+
+
+
+void HMC5843::readData(int* readings) {
+
+  
+    char tx[1];
+    char rx[2];
+    
+    
+    tx[0]=HMC5843_X_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    readings[0]= (int)rx[0]<<8|(int)rx[1];
+
+     
+    tx[0]=HMC5843_Y_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    readings[1]= (int)rx[0]<<8|(int)rx[1];
+     
+    tx[0]=HMC5843_Z_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    readings[2]= (int)rx[0]<<8|(int)rx[1];
+    
+}
+
+int HMC5843::getMx() {
+
+    char tx[1];
+    char rx[2];
+    
+    
+    tx[0]=HMC5843_X_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    return ((int)rx[0]<<8|(int)rx[1]);
+
+}
+
+int HMC5843::getMy() {
+
+    char tx[1];
+    char rx[2];
+    
+    
+    tx[0]=HMC5843_Y_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    return ((int)rx[0]<<8|(int)rx[1]);
+ 
+}
+
+
+int HMC5843::getMz(){
+
+    char tx[1];
+    char rx[2];
+    
+    
+    tx[0]=HMC5843_Z_MSB;
+    i2c_->write(HMC5843_I2C_READ,tx,1);
+    i2c_->read(HMC5843_I2C_READ,rx,2);
+    return ((int)rx[0]<<8|(int)rx[1]);
+ 
+}
+
+