Revision 0:03b72060cd83, committed 2011-10-07

Comitter:

Digixx

Date:

Fri Oct 07 21:06:52 2011 +0000

Commit message:

Changed in this revision

diff -r 000000000000 -r 03b72060cd83 HMC5843.cpp
--- /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]);
+ 
+}
+
+     

diff -r 000000000000 -r 03b72060cd83 HMC5843.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HMC5843.h	Fri Oct 07 21:06:52 2011 +0000
@@ -0,0 +1,219 @@
+/**
+ * @author Uwe Gartmann
+ * @author Used HMC5843 library developed by Jose R. Padron and 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 HMC5843 digital compass.
+ *
+ * Datasheet:
+ *
+ * http://www.ssec.honeywell.com/magnetic/datasheets/HMC5843.pdf
+ */
+
+#ifndef HMC5843_H
+#define HMC5843_H
+
+/**
+ * Includes
+ */
+#include "mbed.h"
+
+/**
+ * Defines
+ */
+#define HMC5843_I2C_ADDRESS 0x1E //7-bit address. 0x3C write, 0x3D read.
+#define HMC5843_I2C_WRITE   0x3C 
+#define HMC5843_I2C_READ    0x3D 
+
+//Values Config A
+#define HMC5843_0_5HZ_NORMAL         0x00
+#define HMC5843_0_5HZ_POSITIVE       0x01
+#define HMC5843_0_5HZ_NEGATIVE       0x02
+
+#define HMC5843_1HZ_NORMAL           0x04
+#define HMC5843_1HZ_POSITIVE         0x05
+#define HMC5843_1HZ_NEGATIVE         0x06
+
+#define HMC5843_2HZ_NORMAL           0x08
+#define HMC5843_2HZ_POSITIVE         0x09
+#define HMC5843_2HZ_NEGATIVE         0x0A
+
+#define HMC5843_5HZ_NORMAL           0x0C
+#define HMC5843_5HZ_POSITIVE         0x0D
+#define HMC5843_5HZ_NEGATIVE         0x0E
+
+#define HMC5843_10HZ_NORMAL           0x10
+#define HMC5843_10HZ_POSITIVE         0x11
+#define HMC5843_10HZ_NEGATIVE         0x12
+
+#define HMC5843_20HZ_NORMAL           0x14
+#define HMC5843_20HZ_POSITIVE         0x15
+#define HMC5843_20HZ_NEGATIVE         0x16
+
+#define HMC5843_50HZ_NORMAL           0x18
+#define HMC5843_50HZ_POSITIVE         0x19
+#define HMC5843_50HZ_NEGATIVE         0x1A
+
+//Values Config B
+#define HMC5843_0_7GA         0x00
+#define HMC5843_1_0GA         0x20
+#define HMC5843_1_5GA         0x40
+#define HMC5843_2_0GA         0x60
+#define HMC5843_3_2GA         0x80
+#define HMC5843_3_8GA         0xA0
+#define HMC5843_4_5GA         0xC0
+#define HMC5843_6_5GA         0xE0
+
+//Values MODE
+#define HMC5843_CONTINUOUS   0x00
+#define HMC5843_SINGLE         0x01
+#define HMC5843_IDLE         0x02
+#define HMC5843_SLEEP         0x03
+
+
+
+#define HMC5843_CONFIG_A     0x00
+#define HMC5843_CONFIG_B     0x01
+#define HMC5843_MODE         0x02
+#define HMC5843_X_MSB        0x03
+#define HMC5843_X_LSB        0x04
+#define HMC5843_Y_MSB        0x05
+#define HMC5843_Y_LSB        0x06
+#define HMC5843_Z_MSB        0x07
+#define HMC5843_Z_LSB        0x08
+#define HMC5843_STATUS       0x09
+#define HMC5843_IDENT_A      0x0A
+#define HMC5843_IDENT_B      0x0B
+#define HMC5843_IDENT_C      0x0C
+
+
+
+/**
+ * Honeywell HMC5843 digital compass.
+ */
+class HMC5843 {
+
+public:
+
+    /**
+     * Constructor.
+     *
+     * @param sda mbed pin to use for SDA line of I2C interface.
+     * @param scl mbed pin to use for SCL line of I2C interface.
+     */
+    HMC5843(PinName sda, PinName scl);
+
+        
+     /**
+     * Enter into sleep mode.
+     *
+     */
+    void setSleepMode();
+    
+       
+     /**
+     * Set Device in Default Mode.
+     * HMC5843_CONTINUOUS, HMC5843_10HZ_NORMAL HMC5843_1_0GA
+     */
+    void setDefault();
+    
+       
+    /**
+     * Read the memory location on the device which contains the address.
+     *
+     * @param Pointer to a buffer to hold the address value
+     * Expected     H, 4 and 3.
+     */
+    void getAddress(char * address);
+
+
+    
+    /**
+     * Set the operation mode.
+     *
+     * @param mode 0x00 -> Continuous
+     *             0x01 -> Single
+     *             0x02 -> Idle
+     * @param ConfigA values
+    * @param ConfigB values
+     */
+    void setOpMode(int mode, int ConfigA, int ConfigB);
+    
+     /**
+     * Write to  on the device.
+     *
+     * @param address Address to write to.
+     * @param data Data to write.
+     */
+    
+    void write(int address, int data);
+
+     /**
+     * Get the output of all three axes.
+     *
+     * @param Pointer to a buffer to hold the magnetics value for the
+     *        x-axis, y-axis and z-axis [in that order].
+     */
+    void readData(int* readings);
+    
+    /**
+     * Get the output of X axis.
+     *
+     * @return x-axis magnetic value
+     */
+    int getMx();
+    
+    /**
+     * Get the output of Y axis.
+     *
+     * @return y-axis magnetic value
+     */
+    int getMy();
+    
+    /**
+     * Get the output of Z axis.
+     *
+     * @return z-axis magnetic value
+     */
+    int getMz();
+   
+    
+    /**
+     * Get the current operation mode.
+     *
+     * @return Status register values
+     */
+    int getStatus(void);
+
+  
+
+    I2C* i2c_;
+
+   
+
+};
+
+#endif /* HMC5843_H */