JP PANG / MMA8491Q

modified from MMA8451Q

Dependents:   XtrinsicSensorEVK SDFileSystem_HelloWorld5_copy xtrinsic_sensors

MMA8491Q.h@0:41db55eef564, 2013-10-10 (annotated)

Committer:
jppang
Date:
Thu Oct 10 03:20:44 2013 +0000
Revision:
0:41db55eef564
Child:
1:2d4b7fadb1e6
modified from MMA8451Q

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jppang 0:41db55eef564 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
jppang 0:41db55eef564 2 *
jppang 0:41db55eef564 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
jppang 0:41db55eef564 4 * and associated documentation files (the "Software"), to deal in the Software without
jppang 0:41db55eef564 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
jppang 0:41db55eef564 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
jppang 0:41db55eef564 7 * Software is furnished to do so, subject to the following conditions:
jppang 0:41db55eef564 8 *
jppang 0:41db55eef564 9 * The above copyright notice and this permission notice shall be included in all copies or
jppang 0:41db55eef564 10 * substantial portions of the Software.
jppang 0:41db55eef564 11 *
jppang 0:41db55eef564 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
jppang 0:41db55eef564 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
jppang 0:41db55eef564 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
jppang 0:41db55eef564 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jppang 0:41db55eef564 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
jppang 0:41db55eef564 17 */
jppang 0:41db55eef564 18
jppang 0:41db55eef564 19 #ifndef MMA8491Q_H
jppang 0:41db55eef564 20 #define MMA8491Q_H
jppang 0:41db55eef564 21
jppang 0:41db55eef564 22 #include "mbed.h"
jppang 0:41db55eef564 23
jppang 0:41db55eef564 24 /**
jppang 0:41db55eef564 25 * MMA8491Q accelerometer example
jppang 0:41db55eef564 26 *
jppang 0:41db55eef564 27 * @code
jppang 0:41db55eef564 28 * #include "mbed.h"
jppang 0:41db55eef564 29 * #include "MMA8491Q.h"
jppang 0:41db55eef564 30 *
jppang 0:41db55eef564 31 * #define MMA8451_I2C_ADDRESS (0x1d<<1)
jppang 0:41db55eef564 32 *
jppang 0:41db55eef564 33 * int main(void) {
jppang 0:41db55eef564 34 *
jppang 0:41db55eef564 35 * MMA8491Q acc(P_E25, P_E24, MMA8491_I2C_ADDRESS);
jppang 0:41db55eef564 36 * PwmOut rled(LED_RED);
jppang 0:41db55eef564 37 * PwmOut gled(LED_GREEN);
jppang 0:41db55eef564 38 * PwmOut bled(LED_BLUE);
jppang 0:41db55eef564 39 *
jppang 0:41db55eef564 40 * while (true) {
jppang 0:41db55eef564 41 * rled = 1.0 - abs(acc.getAccX());
jppang 0:41db55eef564 42 * gled = 1.0 - abs(acc.getAccY());
jppang 0:41db55eef564 43 * bled = 1.0 - abs(acc.getAccZ());
jppang 0:41db55eef564 44 * wait(0.1);
jppang 0:41db55eef564 45 * }
jppang 0:41db55eef564 46 * }
jppang 0:41db55eef564 47 * @endcode
jppang 0:41db55eef564 48 */
jppang 0:41db55eef564 49 class MMA8491Q
jppang 0:41db55eef564 50 {
jppang 0:41db55eef564 51 public:
jppang 0:41db55eef564 52 /**
jppang 0:41db55eef564 53 * MMA8491Q constructor
jppang 0:41db55eef564 54 *
jppang 0:41db55eef564 55 * @param sda SDA pin
jppang 0:41db55eef564 56 * @param sdl SCL pin
jppang 0:41db55eef564 57 * @param addr addr of the I2C peripheral
jppang 0:41db55eef564 58 */
jppang 0:41db55eef564 59 MMA8491Q(PinName sda, PinName scl, int addr);
jppang 0:41db55eef564 60
jppang 0:41db55eef564 61 /**
jppang 0:41db55eef564 62 * MMA8491Q destructor
jppang 0:41db55eef564 63 */
jppang 0:41db55eef564 64 ~MMA8491Q();
jppang 0:41db55eef564 65
jppang 0:41db55eef564 66 /**
jppang 0:41db55eef564 67 * Get the value of the WHO_AM_I register
jppang 0:41db55eef564 68 *
jppang 0:41db55eef564 69 * @returns WHO_AM_I value
jppang 0:41db55eef564 70 */
jppang 0:41db55eef564 71 uint8_t getWhoAmI();
jppang 0:41db55eef564 72
jppang 0:41db55eef564 73 /**
jppang 0:41db55eef564 74 * Get X axis acceleration
jppang 0:41db55eef564 75 *
jppang 0:41db55eef564 76 * @returns X axis acceleration
jppang 0:41db55eef564 77 */
jppang 0:41db55eef564 78 float getAccX();
jppang 0:41db55eef564 79
jppang 0:41db55eef564 80 /**
jppang 0:41db55eef564 81 * Get Y axis acceleration
jppang 0:41db55eef564 82 *
jppang 0:41db55eef564 83 * @returns Y axis acceleration
jppang 0:41db55eef564 84 */
jppang 0:41db55eef564 85 float getAccY();
jppang 0:41db55eef564 86
jppang 0:41db55eef564 87 /**
jppang 0:41db55eef564 88 * Get Z axis acceleration
jppang 0:41db55eef564 89 *
jppang 0:41db55eef564 90 * @returns Z axis acceleration
jppang 0:41db55eef564 91 */
jppang 0:41db55eef564 92 float getAccZ();
jppang 0:41db55eef564 93
jppang 0:41db55eef564 94 /**
jppang 0:41db55eef564 95 * Get XYZ axis acceleration
jppang 0:41db55eef564 96 *
jppang 0:41db55eef564 97 * @param res array where acceleration data will be stored
jppang 0:41db55eef564 98 */
jppang 0:41db55eef564 99 void getAccAllAxis(float * res);
jppang 0:41db55eef564 100
jppang 0:41db55eef564 101 /** JK
jppang 0:41db55eef564 102 * Setup Double Tap detection
jppang 0:41db55eef564 103
jppang 0:41db55eef564 104
jppang 0:41db55eef564 105 Example:
jppang 0:41db55eef564 106
jppang 0:41db55eef564 107 #include "mbed.h"
jppang 0:41db55eef564 108 #include "MMA8491Q.h"
jppang 0:41db55eef564 109
jppang 0:41db55eef564 110 #define MMA8451_I2C_ADDRESS (0x1d<<1)
jppang 0:41db55eef564 111 #define ON 0
jppang 0:41db55eef564 112 #define OFF !ON
jppang 0:41db55eef564 113
jppang 0:41db55eef564 114 //Setup the interrupts for the MMA8491Q
jppang 0:41db55eef564 115 InterruptIn accInt1(PTA14);
jppang 0:41db55eef564 116 InterruptIn accInt2(PTA15);//not used in this prog but this is the other int from the accelorometer
jppang 0:41db55eef564 117
jppang 0:41db55eef564 118 uint8_t togstat=0;//Led status
jppang 0:41db55eef564 119 DigitalOut bled(LED_BLUE);
jppang 0:41db55eef564 120
jppang 0:41db55eef564 121
jppang 0:41db55eef564 122 void tapTrue(void){//ISR
jppang 0:41db55eef564 123 if(togstat == 0){
jppang 0:41db55eef564 124 togstat = 1;
jppang 0:41db55eef564 125 bled=ON;
jppang 0:41db55eef564 126 } else {
jppang 0:41db55eef564 127 togstat = 0;
jppang 0:41db55eef564 128 bled=OFF;
jppang 0:41db55eef564 129 }
jppang 0:41db55eef564 130
jppang 0:41db55eef564 131 }
jppang 0:41db55eef564 132
jppang 0:41db55eef564 133
jppang 0:41db55eef564 134 int main(void) {
jppang 0:41db55eef564 135
jppang 0:41db55eef564 136 MMA8491Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS);//accelorometer instance
jppang 0:41db55eef564 137
jppang 0:41db55eef564 138 acc.setDoubleTap();//Setup the MMA8491Q to look for a double Tap
jppang 0:41db55eef564 139 accInt1.rise(&tapTrue);//call tapTrue when an interrupt is generated on PTA14
jppang 0:41db55eef564 140
jppang 0:41db55eef564 141 while (true) {
jppang 0:41db55eef564 142 //Interrupt driven so nothing in main loop
jppang 0:41db55eef564 143 }
jppang 0:41db55eef564 144 }
jppang 0:41db55eef564 145
jppang 0:41db55eef564 146
jppang 0:41db55eef564 147 */
jppang 0:41db55eef564 148 void setDoubleTap(void);
jppang 0:41db55eef564 149
jppang 0:41db55eef564 150 private:
jppang 0:41db55eef564 151 I2C m_i2c;
jppang 0:41db55eef564 152 int m_addr;
jppang 0:41db55eef564 153 void readRegs(int addr, uint8_t * data, int len);
jppang 0:41db55eef564 154 void writeRegs(uint8_t * data, int len);
jppang 0:41db55eef564 155 int16_t getAccAxis(uint8_t addr);
jppang 0:41db55eef564 156
jppang 0:41db55eef564 157 };
jppang 0:41db55eef564 158
jppang 0:41db55eef564 159 #endif