Shaojie Wang / SB

SB

Fork of MMA8451Q by Johan Kritzinger

MMA8451Q.h@6:f834bd401ef2, 2014-02-08 (annotated)

Committer:
bmdlh
Date:
Sat Feb 08 22:20:08 2014 +0000
Revision:
6:f834bd401ef2
Parent:
5:2d14600116fc 
ni men bu zhi dao

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:d2630136d51e 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:d2630136d51e 2 *
samux 1:d2630136d51e 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:d2630136d51e 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:d2630136d51e 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:d2630136d51e 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:d2630136d51e 7 * Software is furnished to do so, subject to the following conditions:
samux 1:d2630136d51e 8 *
samux 1:d2630136d51e 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:d2630136d51e 10 * substantial portions of the Software.
samux 1:d2630136d51e 11 *
samux 1:d2630136d51e 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:d2630136d51e 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:d2630136d51e 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:d2630136d51e 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:d2630136d51e 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:d2630136d51e 17 */
samux 1:d2630136d51e 18
emilmont 0:6149091f755d 19 #ifndef MMA8451Q_H
emilmont 0:6149091f755d 20 #define MMA8451Q_H
bmdlh 6:f834bd401ef2 21 #define MMA8415Q_SAMPLE800 0x00
bmdlh 6:f834bd401ef2 22 #define MMA8415Q_SAMPLE400 0x08
bmdlh 6:f834bd401ef2 23 #define MMA8415Q_SAMPLE200 0x10
bmdlh 6:f834bd401ef2 24 #define MMA8415Q_SAMPLE100 0x18
bmdlh 6:f834bd401ef2 25 #define MMA8415Q_SAMPLE50 0x20
bmdlh 6:f834bd401ef2 26 #define MMA8415Q_SAMPLE12_5 0x28
bmdlh 6:f834bd401ef2 27 #define MMA8415Q_SAMPLE6_25 0x30
bmdlh 6:f834bd401ef2 28 #define MMA8415Q_SAMPLE1_56 0x38
emilmont 0:6149091f755d 29
emilmont 0:6149091f755d 30 #include "mbed.h"
emilmont 0:6149091f755d 31
samux 1:d2630136d51e 32 /**
samux 1:d2630136d51e 33 * MMA8451Q accelerometer example
samux 2:a077541cbadc 34 *
samux 2:a077541cbadc 35 * @code
samux 1:d2630136d51e 36 * #include "mbed.h"
samux 1:d2630136d51e 37 * #include "MMA8451Q.h"
chris 3:db7126dbd63f 38 *
samux 1:d2630136d51e 39 * #define MMA8451_I2C_ADDRESS (0x1d<<1)
chris 3:db7126dbd63f 40 *
chris 4:c4d879a39775 41 * int main(void) {
chris 4:c4d879a39775 42 *
chris 3:db7126dbd63f 43 * MMA8451Q acc(P_E25, P_E24, MMA8451_I2C_ADDRESS);
chris 3:db7126dbd63f 44 * PwmOut rled(LED_RED);
chris 3:db7126dbd63f 45 * PwmOut gled(LED_GREEN);
chris 3:db7126dbd63f 46 * PwmOut bled(LED_BLUE);
chris 3:db7126dbd63f 47 *
chris 3:db7126dbd63f 48 * while (true) {
chris 3:db7126dbd63f 49 * rled = 1.0 - abs(acc.getAccX());
chris 3:db7126dbd63f 50 * gled = 1.0 - abs(acc.getAccY());
chris 3:db7126dbd63f 51 * bled = 1.0 - abs(acc.getAccZ());
chris 3:db7126dbd63f 52 * wait(0.1);
chris 3:db7126dbd63f 53 * }
samux 1:d2630136d51e 54 * }
samux 2:a077541cbadc 55 * @endcode
samux 1:d2630136d51e 56 */
emilmont 0:6149091f755d 57 class MMA8451Q
emilmont 0:6149091f755d 58 {
emilmont 0:6149091f755d 59 public:
samux 1:d2630136d51e 60 /**
samux 1:d2630136d51e 61 * MMA8451Q constructor
samux 1:d2630136d51e 62 *
samux 1:d2630136d51e 63 * @param sda SDA pin
samux 1:d2630136d51e 64 * @param sdl SCL pin
samux 1:d2630136d51e 65 * @param addr addr of the I2C peripheral
emilmont 0:6149091f755d 66 */
emilmont 0:6149091f755d 67 MMA8451Q(PinName sda, PinName scl, int addr);
emilmont 0:6149091f755d 68
samux 1:d2630136d51e 69 /**
samux 1:d2630136d51e 70 * MMA8451Q destructor
emilmont 0:6149091f755d 71 */
emilmont 0:6149091f755d 72 ~MMA8451Q();
emilmont 0:6149091f755d 73
samux 1:d2630136d51e 74 /**
emilmont 0:6149091f755d 75 * Get the value of the WHO_AM_I register
emilmont 0:6149091f755d 76 *
samux 1:d2630136d51e 77 * @returns WHO_AM_I value
emilmont 0:6149091f755d 78 */
emilmont 0:6149091f755d 79 uint8_t getWhoAmI();
emilmont 0:6149091f755d 80
samux 1:d2630136d51e 81 /**
emilmont 0:6149091f755d 82 * Get X axis acceleration
emilmont 0:6149091f755d 83 *
samux 1:d2630136d51e 84 * @returns X axis acceleration
emilmont 0:6149091f755d 85 */
chris 3:db7126dbd63f 86 float getAccX();
emilmont 0:6149091f755d 87
samux 1:d2630136d51e 88 /**
emilmont 0:6149091f755d 89 * Get Y axis acceleration
emilmont 0:6149091f755d 90 *
samux 1:d2630136d51e 91 * @returns Y axis acceleration
emilmont 0:6149091f755d 92 */
chris 3:db7126dbd63f 93 float getAccY();
emilmont 0:6149091f755d 94
samux 1:d2630136d51e 95 /**
emilmont 0:6149091f755d 96 * Get Z axis acceleration
emilmont 0:6149091f755d 97 *
samux 1:d2630136d51e 98 * @returns Z axis acceleration
emilmont 0:6149091f755d 99 */
chris 3:db7126dbd63f 100 float getAccZ();
emilmont 0:6149091f755d 101
samux 1:d2630136d51e 102 /**
emilmont 0:6149091f755d 103 * Get XYZ axis acceleration
emilmont 0:6149091f755d 104 *
samux 1:d2630136d51e 105 * @param res array where acceleration data will be stored
emilmont 0:6149091f755d 106 */
chris 3:db7126dbd63f 107 void getAccAllAxis(float * res);
JoKer 5:2d14600116fc 108
JoKer 5:2d14600116fc 109 /** JK
JoKer 5:2d14600116fc 110 * Setup Double Tap detection
JoKer 5:2d14600116fc 111
JoKer 5:2d14600116fc 112
JoKer 5:2d14600116fc 113 Example:
JoKer 5:2d14600116fc 114
JoKer 5:2d14600116fc 115 #include "mbed.h"
JoKer 5:2d14600116fc 116 #include "MMA8451Q.h"
JoKer 5:2d14600116fc 117
JoKer 5:2d14600116fc 118 #define MMA8451_I2C_ADDRESS (0x1d<<1)
JoKer 5:2d14600116fc 119 #define ON 0
JoKer 5:2d14600116fc 120 #define OFF !ON
JoKer 5:2d14600116fc 121
JoKer 5:2d14600116fc 122 //Setup the interrupts for the MMA8451Q
JoKer 5:2d14600116fc 123 InterruptIn accInt1(PTA14);
JoKer 5:2d14600116fc 124 InterruptIn accInt2(PTA15);//not used in this prog but this is the other int from the accelorometer
JoKer 5:2d14600116fc 125
JoKer 5:2d14600116fc 126 uint8_t togstat=0;//Led status
JoKer 5:2d14600116fc 127 DigitalOut bled(LED_BLUE);
JoKer 5:2d14600116fc 128
JoKer 5:2d14600116fc 129
JoKer 5:2d14600116fc 130 void tapTrue(void){//ISR
JoKer 5:2d14600116fc 131 if(togstat == 0){
JoKer 5:2d14600116fc 132 togstat = 1;
JoKer 5:2d14600116fc 133 bled=ON;
JoKer 5:2d14600116fc 134 } else {
JoKer 5:2d14600116fc 135 togstat = 0;
JoKer 5:2d14600116fc 136 bled=OFF;
JoKer 5:2d14600116fc 137 }
JoKer 5:2d14600116fc 138
JoKer 5:2d14600116fc 139 }
JoKer 5:2d14600116fc 140
JoKer 5:2d14600116fc 141
JoKer 5:2d14600116fc 142 int main(void) {
JoKer 5:2d14600116fc 143
JoKer 5:2d14600116fc 144 MMA8451Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS);//accelorometer instance
JoKer 5:2d14600116fc 145
JoKer 5:2d14600116fc 146 acc.setDoubleTap();//Setup the MMA8451Q to look for a double Tap
JoKer 5:2d14600116fc 147 accInt1.rise(&tapTrue);//call tapTrue when an interrupt is generated on PTA14
JoKer 5:2d14600116fc 148
JoKer 5:2d14600116fc 149 while (true) {
JoKer 5:2d14600116fc 150 //Interrupt driven so nothing in main loop
JoKer 5:2d14600116fc 151 }
JoKer 5:2d14600116fc 152 }
JoKer 5:2d14600116fc 153
JoKer 5:2d14600116fc 154
JoKer 5:2d14600116fc 155 */
JoKer 5:2d14600116fc 156 void setDoubleTap(void);
bmdlh 6:f834bd401ef2 157 void Overwrite_dr(float dateRate);
bmdlh 6:f834bd401ef2 158 void Setdr(float dateRate);
emilmont 0:6149091f755d 159 private:
samux 1:d2630136d51e 160 I2C m_i2c;
emilmont 0:6149091f755d 161 int m_addr;
samux 1:d2630136d51e 162 void readRegs(int addr, uint8_t * data, int len);
samux 1:d2630136d51e 163 void writeRegs(uint8_t * data, int len);
emilmont 0:6149091f755d 164 int16_t getAccAxis(uint8_t addr);
bmdlh 6:f834bd401ef2 165 char dr;
emilmont 0:6149091f755d 166
emilmont 0:6149091f755d 167 };
emilmont 0:6149091f755d 168
emilmont 0:6149091f755d 169 #endif