samux MMA8451Q accelerometer library

Dependents:   AirMouse FRDM_LCD4884 TextLCD_HelloWorld FRDM_MMA8451Q ... more

Files at this revision

API Documentation at this revision

Comitter:
samux
Date:
Thu Oct 11 14:26:22 2012 +0000
Parent:
0:6149091f755d
Child:
2:a077541cbadc
Commit message:
modify doxygen comments/add license

Changed in this revision

MMA8451Q.cpp Show annotated file Show diff for this revision Revisions of this file
MMA8451Q.h Show annotated file Show diff for this revision Revisions of this file
--- a/MMA8451Q.cpp	Thu Oct 11 10:54:16 2012 +0000
+++ b/MMA8451Q.cpp	Thu Oct 11 14:26:22 2012 +0000
@@ -1,24 +1,42 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* 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.
+*/
+
 #include "MMA8451Q.h"
 
-#define REG_WHO_AM_I       0x0D
-#define REG_CTRL_REG_1     0x2A
+#define REG_WHO_AM_I      0x0D
+#define REG_CTRL_REG_1    0x2A
 #define REG_OUT_X_MSB     0x01
 #define REG_OUT_Y_MSB     0x03
 #define REG_OUT_Z_MSB     0x05
 
-#define UINT14_MAX 16383
+#define UINT14_MAX        16383
 
 MMA8451Q::MMA8451Q(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) {
     // activate the peripheral
     uint8_t data[2] = {REG_CTRL_REG_1, 0x01};
-    write_regs(data, 2);
+    writeRegs(data, 2);
 }
 
 MMA8451Q::~MMA8451Q() { }
 
 uint8_t MMA8451Q::getWhoAmI() {
     uint8_t who_am_i = 0;
-    read_regs(REG_WHO_AM_I, &who_am_i, 1);
+    readRegs(REG_WHO_AM_I, &who_am_i, 1);
     return who_am_i;
 }
 
@@ -43,7 +61,7 @@
 int16_t MMA8451Q::getAccAxis(uint8_t addr) {
     int16_t acc;
     uint8_t res[2];
-    read_regs(addr, res, 2);
+    readRegs(addr, res, 2);
 
     acc = (res[0] << 6) | (res[1] >> 2);
     if (acc > UINT14_MAX/2)
@@ -52,12 +70,12 @@
     return acc;
 }
 
-void MMA8451Q::read_regs(int addr, uint8_t * data, int len) {
+void MMA8451Q::readRegs(int addr, uint8_t * data, int len) {
     char t[1] = {addr};
     m_i2c.write(m_addr, t, 1, true);
     m_i2c.read(m_addr, (char *)data, len);
 }
 
-void MMA8451Q::write_regs(uint8_t * data, int len) {
+void MMA8451Q::writeRegs(uint8_t * data, int len) {
     m_i2c.write(m_addr, (char *)data, len);
 }
--- a/MMA8451Q.h	Thu Oct 11 10:54:16 2012 +0000
+++ b/MMA8451Q.h	Thu Oct 11 14:26:22 2012 +0000
@@ -1,68 +1,106 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* 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.
+*/
+
 #ifndef MMA8451Q_H
 #define MMA8451Q_H
 
 #include "mbed.h"
 
-//!Library for the MMA8451Q motion sensor.
+/**
+* MMA8451Q accelerometer example
+* #include "mbed.h"
+* #include "MMA8451Q.h"
+*
+* #define MMA8451_I2C_ADDRESS (0x1d<<1)
+*
+* int main(void) {
+*    DigitalOut led(LED_GREEN);
+*    MMA8451Q acc(P_E25, P_E24, MMA8451_I2C_ADDRESS);
+*    printf("WHO AM I: 0x%2X\r\n", acc.getWhoAmI());
+*    
+*    while (true) {
+*        printf("-----------\r\n");
+*        printf("acc_x: %d\r\n", acc.getAccX());
+*        printf("acc_y: %d\r\n", acc.getAccY());
+*        printf("acc_z: %d\r\n", acc.getAccZ());
+*        
+*        wait(1);
+*        led = !led;
+*    }
+* }
+*/
 class MMA8451Q
 {
 public:
-  //!Creates an instance of the class.
-  /*
-  * Connect module at I2C address addr using I2C port pins sda and scl.
-  * MMA8451Q
-  * \param sda SDA pin
-  * \param sdl SCL pin
-  * \param addr addr of the I2C peripheral
+  /**
+  * MMA8451Q constructor
+  *
+  * @param sda SDA pin
+  * @param sdl SCL pin
+  * @param addr addr of the I2C peripheral
   */
   MMA8451Q(PinName sda, PinName scl, int addr);
 
-  /*
-  * Destroys instance.
+  /**
+  * MMA8451Q destructor
   */
   ~MMA8451Q();
 
-  /*
+  /**
    * Get the value of the WHO_AM_I register
    *
-   * \returns WHO_AM_I value
+   * @returns WHO_AM_I value
    */
   uint8_t getWhoAmI();
 
-  /*
+  /**
    * Get X axis acceleration
    *
-   * \returns X axis acceleration
+   * @returns X axis acceleration
    */
   int16_t getAccX();
 
-  /*
+  /**
    * Get Y axis acceleration
    *
-   * \returns Y axis acceleration
+   * @returns Y axis acceleration
    */
   int16_t getAccY();
 
-  /*
+  /**
    * Get Z axis acceleration
    *
-   * \returns Z axis acceleration
+   * @returns Z axis acceleration
    */
   int16_t getAccZ();
 
-  /*
+  /**
    * Get XYZ axis acceleration
    *
-   * \param res array where acceleration data will be stored
+   * @param res array where acceleration data will be stored
    */
-  void    getAccAllAxis(int16_t * res);
-
-  I2C m_i2c;
+  void getAccAllAxis(int16_t * res);
 
 private:
+  I2C m_i2c;
   int m_addr;
-  void read_regs(int addr, uint8_t * data, int len);
-  void write_regs(uint8_t * data, int len);
+  void readRegs(int addr, uint8_t * data, int len);
+  void writeRegs(uint8_t * data, int len);
   int16_t getAccAxis(uint8_t addr);
 
 };