DE_4.2.2 Project 1b 150208 *has errors I dont know how to fix
Fork of MMA8451Q8 by
MMA8451Q8.cpp@10:d250f3661e3a, 2015-02-09 (annotated)
- Committer:
- destradafilm
- Date:
- Mon Feb 09 04:50:56 2015 +0000
- Revision:
- 10:d250f3661e3a
- Parent:
- 9:a9cba88ad7f6
DE_4.2.2
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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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 | */ |
scohennm | 5:5a7293378401 | 18 | // Modify to change full scale gravity range 141207 sc |
samux | 1:d2630136d51e | 19 | |
scohennm | 5:5a7293378401 | 20 | |
scohennm | 5:5a7293378401 | 21 | #include "MMA8451Q8.h" |
emilmont | 0:6149091f755d | 22 | |
samux | 1:d2630136d51e | 23 | #define REG_WHO_AM_I 0x0D |
samux | 1:d2630136d51e | 24 | #define REG_CTRL_REG_1 0x2A |
emilmont | 0:6149091f755d | 25 | #define REG_OUT_X_MSB 0x01 |
emilmont | 0:6149091f755d | 26 | #define REG_OUT_Y_MSB 0x03 |
emilmont | 0:6149091f755d | 27 | #define REG_OUT_Z_MSB 0x05 |
scohennm | 5:5a7293378401 | 28 | #define XYZ_DATA_CFG 0x0E |
scohennm | 8:993bb9e96a4b | 29 | // adding tap config register adderesses |
scohennm | 8:993bb9e96a4b | 30 | #define REG_PULSE_SRC 0x22 |
scohennm | 8:993bb9e96a4b | 31 | #define REG_PULSE_CFG 0x21 |
emilmont | 0:6149091f755d | 32 | |
destradafilm | 9:a9cba88ad7f6 | 33 | // pulse threshold for x, y , & z Registers |
destradafilm | 9:a9cba88ad7f6 | 34 | #define PULSE_THSX 0x23 |
destradafilm | 9:a9cba88ad7f6 | 35 | #define PULSE_THSY 0x24 |
destradafilm | 9:a9cba88ad7f6 | 36 | #define PULSE_THSZ 0x25 |
destradafilm | 9:a9cba88ad7f6 | 37 | |
destradafilm | 9:a9cba88ad7f6 | 38 | // Pulse Time limit first pulse |
destradafilm | 9:a9cba88ad7f6 | 39 | #define PULSE_TMLT 0x26 |
destradafilm | 9:a9cba88ad7f6 | 40 | |
destradafilm | 9:a9cba88ad7f6 | 41 | // Latency time for 2nd pulse |
destradafilm | 9:a9cba88ad7f6 | 42 | #define PULSE_LTCY 0x27 |
destradafilm | 9:a9cba88ad7f6 | 43 | |
samux | 1:d2630136d51e | 44 | #define UINT14_MAX 16383 |
emilmont | 0:6149091f755d | 45 | |
scohennm | 5:5a7293378401 | 46 | #define MAX_2G 0x00 |
scohennm | 5:5a7293378401 | 47 | #define MAX_4G 0x01 |
scohennm | 5:5a7293378401 | 48 | #define MAX_8G 0x02 |
scohennm | 5:5a7293378401 | 49 | |
scohennm | 5:5a7293378401 | 50 | #define NUM_DATA 2 |
scohennm | 5:5a7293378401 | 51 | #define GSCALING 1024.0 |
scohennm | 5:5a7293378401 | 52 | #define ADDRESS_INDEX 0 |
scohennm | 5:5a7293378401 | 53 | #define DATA_INDEX 1 |
scohennm | 5:5a7293378401 | 54 | |
scohennm | 5:5a7293378401 | 55 | float gScaling[3] = {4095.0,2048.0,1024.0}; //scaling for acceleration of gravity values |
scohennm | 5:5a7293378401 | 56 | |
emilmont | 0:6149091f755d | 57 | MMA8451Q::MMA8451Q(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { |
emilmont | 0:6149091f755d | 58 | // activate the peripheral |
emilmont | 0:6149091f755d | 59 | uint8_t data[2] = {REG_CTRL_REG_1, 0x01}; |
samux | 1:d2630136d51e | 60 | writeRegs(data, 2); |
emilmont | 0:6149091f755d | 61 | } |
emilmont | 0:6149091f755d | 62 | |
emilmont | 0:6149091f755d | 63 | MMA8451Q::~MMA8451Q() { } |
emilmont | 0:6149091f755d | 64 | |
emilmont | 0:6149091f755d | 65 | uint8_t MMA8451Q::getWhoAmI() { |
emilmont | 0:6149091f755d | 66 | uint8_t who_am_i = 0; |
samux | 1:d2630136d51e | 67 | readRegs(REG_WHO_AM_I, &who_am_i, 1); |
emilmont | 0:6149091f755d | 68 | return who_am_i; |
emilmont | 0:6149091f755d | 69 | } |
scohennm | 5:5a7293378401 | 70 | void MMA8451Q::setGLimit(int gSelect) { |
scohennm | 5:5a7293378401 | 71 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; |
scohennm | 5:5a7293378401 | 72 | gChosen = gSelect; |
scohennm | 5:5a7293378401 | 73 | writeRegs(data, NUM_DATA); // put in standby |
scohennm | 5:5a7293378401 | 74 | data[ADDRESS_INDEX ] = XYZ_DATA_CFG; |
scohennm | 5:5a7293378401 | 75 | data[DATA_INDEX] = gChosen; |
scohennm | 5:5a7293378401 | 76 | writeRegs(data, 2);// change g limit |
scohennm | 5:5a7293378401 | 77 | data[ADDRESS_INDEX ] = REG_CTRL_REG_1; |
scohennm | 5:5a7293378401 | 78 | data[DATA_INDEX] = 0x01; |
scohennm | 5:5a7293378401 | 79 | writeRegs(data, 2); // make active |
scohennm | 5:5a7293378401 | 80 | } |
scohennm | 8:993bb9e96a4b | 81 | // add Puse configuratioin register access |
scohennm | 8:993bb9e96a4b | 82 | // Also add function prototype to .h file |
scohennm | 8:993bb9e96a4b | 83 | void MMA8451Q::setPulseConfiguration(uint8_t latch,uint8_t axisSet) { |
scohennm | 8:993bb9e96a4b | 84 | uint8_t configBits; |
destradafilm | 9:a9cba88ad7f6 | 85 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; // put in standby mode /// Q: is 0x00 saying switch off? |
destradafilm | 9:a9cba88ad7f6 | 86 | // set up configuration bits. |
destradafilm | 9:a9cba88ad7f6 | 87 | configBits = latch | axisSet; /// Q: what does the "|" do? |
destradafilm | 9:a9cba88ad7f6 | 88 | writeRegs(data, NUM_DATA); // put in standby /// Q: is it sending data[NUM_DATA] or two seperate vars? |
destradafilm | 9:a9cba88ad7f6 | 89 | data[ADDRESS_INDEX ] = REG_PULSE_CFG; /// is this a function after it is put into standby? |
destradafilm | 9:a9cba88ad7f6 | 90 | data[DATA_INDEX] = configBits; |
destradafilm | 9:a9cba88ad7f6 | 91 | writeRegs(data, NUM_DATA); /// Q: what is it doing here? standby again? |
destradafilm | 9:a9cba88ad7f6 | 92 | data[ADDRESS_INDEX ] = REG_CTRL_REG_1; // put back in active mode // how is this back in active mode? |
destradafilm | 9:a9cba88ad7f6 | 93 | data[DATA_INDEX] = 0x01; |
destradafilm | 9:a9cba88ad7f6 | 94 | writeRegs(data, 2); // make active //Q: what is the 2 here? |
destradafilm | 9:a9cba88ad7f6 | 95 | } |
destradafilm | 9:a9cba88ad7f6 | 96 | |
destradafilm | 9:a9cba88ad7f6 | 97 | |
destradafilm | 9:a9cba88ad7f6 | 98 | |
destradafilm | 9:a9cba88ad7f6 | 99 | // added to .h file |
destradafilm | 9:a9cba88ad7f6 | 100 | void setPulseThreshold (uint8_t axisSelect, uint8_t threshold) { |
destradafilm | 9:a9cba88ad7f6 | 101 | uint8_t configBits; |
destradafilm | 9:a9cba88ad7f6 | 102 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; // put in standby mode |
scohennm | 8:993bb9e96a4b | 103 | // set up configuration bits. |
destradafilm | 9:a9cba88ad7f6 | 104 | configBits = axisSelect | threshold; |
destradafilm | 9:a9cba88ad7f6 | 105 | writeRegs(data, NUM_DATA); // put in standby |
destradafilm | 9:a9cba88ad7f6 | 106 | data[ADDRESS_INDEX ] = PULSE_THSZ; // Set it to Z axis Threshold |
destradafilm | 9:a9cba88ad7f6 | 107 | data[DATA_INDEX] = configBits; |
destradafilm | 9:a9cba88ad7f6 | 108 | writeRegs(data, NUM_DATA); |
destradafilm | 9:a9cba88ad7f6 | 109 | data[ADDRESS_INDEX ] = REG_CTRL_REG_1; // put back in active mode |
destradafilm | 9:a9cba88ad7f6 | 110 | data[DATA_INDEX] = 0x01; |
destradafilm | 9:a9cba88ad7f6 | 111 | writeRegs(data, 2); // make active |
scohennm | 8:993bb9e96a4b | 112 | } |
destradafilm | 9:a9cba88ad7f6 | 113 | |
destradafilm | 9:a9cba88ad7f6 | 114 | void setPulseTimeLimit (uint8_t timeLimit){ |
destradafilm | 9:a9cba88ad7f6 | 115 | uint8_t configBits; |
destradafilm | 9:a9cba88ad7f6 | 116 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; // put in standby mode |
destradafilm | 9:a9cba88ad7f6 | 117 | // set up configuration bits. |
destradafilm | 9:a9cba88ad7f6 | 118 | configBits = timeLimit; |
destradafilm | 9:a9cba88ad7f6 | 119 | writeRegs(data, NUM_DATA); // put in standby |
destradafilm | 9:a9cba88ad7f6 | 120 | data[ADDRESS_INDEX ] = PULSE_TMLT; // Set it to Pulse Time limit Register |
destradafilm | 9:a9cba88ad7f6 | 121 | data[DATA_INDEX] = configBits; |
destradafilm | 9:a9cba88ad7f6 | 122 | writeRegs(data, NUM_DATA); |
destradafilm | 9:a9cba88ad7f6 | 123 | data[ADDRESS_INDEX ] = REG_CTRL_REG_1; // put back in active mode |
destradafilm | 9:a9cba88ad7f6 | 124 | data[DATA_INDEX] = 0x01; |
destradafilm | 9:a9cba88ad7f6 | 125 | writeRegs(data, 2); // make active |
destradafilm | 9:a9cba88ad7f6 | 126 | } |
destradafilm | 9:a9cba88ad7f6 | 127 | |
destradafilm | 9:a9cba88ad7f6 | 128 | void setPulseLatency (uint8_t latencyTime){ |
destradafilm | 9:a9cba88ad7f6 | 129 | uint8_t configBits; |
destradafilm | 9:a9cba88ad7f6 | 130 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; // put in standby mode |
destradafilm | 9:a9cba88ad7f6 | 131 | // set up configuration bits. |
destradafilm | 9:a9cba88ad7f6 | 132 | configBits = latencyTime; |
destradafilm | 9:a9cba88ad7f6 | 133 | writeRegs(data, NUM_DATA); // put in standby |
destradafilm | 9:a9cba88ad7f6 | 134 | data[ADDRESS_INDEX ] = PULSE_LTCY; // Set it to Pulse Latency Register |
destradafilm | 9:a9cba88ad7f6 | 135 | data[DATA_INDEX] = configBits; |
destradafilm | 9:a9cba88ad7f6 | 136 | writeRegs(data, NUM_DATA); |
destradafilm | 9:a9cba88ad7f6 | 137 | data[ADDRESS_INDEX ] = REG_CTRL_REG_1; // put back in active mode |
destradafilm | 9:a9cba88ad7f6 | 138 | data[DATA_INDEX] = 0x01; |
destradafilm | 9:a9cba88ad7f6 | 139 | writeRegs(data, 2); // make active |
destradafilm | 9:a9cba88ad7f6 | 140 | } |
destradafilm | 9:a9cba88ad7f6 | 141 | |
destradafilm | 10:d250f3661e3a | 142 | //WRITE setRegister In STandby |
destradafilm | 10:d250f3661e3a | 143 | |
destradafilm | 10:d250f3661e3a | 144 | void setRegisterInStandby(uint8_t regAddress, uint8_t regData){ |
destradafilm | 10:d250f3661e3a | 145 | uint8_t data[NUM_DATA] = {REG_CTRL_REG_1, 0x00}; // put in standby mode |
destradafilm | 10:d250f3661e3a | 146 | writeRegs(data, NUM_DATA); // put in standby |
destradafilm | 10:d250f3661e3a | 147 | } |
destradafilm | 10:d250f3661e3a | 148 | |
chris | 3:db7126dbd63f | 149 | float MMA8451Q::getAccX() { |
scohennm | 5:5a7293378401 | 150 | return (float(getAccAxis(REG_OUT_X_MSB))/gScaling[gChosen]); |
emilmont | 0:6149091f755d | 151 | } |
emilmont | 0:6149091f755d | 152 | |
scohennm | 7:ed7e11d269f8 | 153 | |
chris | 3:db7126dbd63f | 154 | float MMA8451Q::getAccY() { |
scohennm | 5:5a7293378401 | 155 | return (float(getAccAxis(REG_OUT_Y_MSB))/gScaling[gChosen]); |
emilmont | 0:6149091f755d | 156 | } |
emilmont | 0:6149091f755d | 157 | |
chris | 3:db7126dbd63f | 158 | float MMA8451Q::getAccZ() { |
scohennm | 5:5a7293378401 | 159 | return (float(getAccAxis(REG_OUT_Z_MSB))/gScaling[gChosen]); |
emilmont | 0:6149091f755d | 160 | } |
emilmont | 0:6149091f755d | 161 | |
chris | 3:db7126dbd63f | 162 | void MMA8451Q::getAccAllAxis(float * res) { |
emilmont | 0:6149091f755d | 163 | res[0] = getAccX(); |
emilmont | 0:6149091f755d | 164 | res[1] = getAccY(); |
emilmont | 0:6149091f755d | 165 | res[2] = getAccZ(); |
emilmont | 0:6149091f755d | 166 | } |
emilmont | 0:6149091f755d | 167 | |
emilmont | 0:6149091f755d | 168 | int16_t MMA8451Q::getAccAxis(uint8_t addr) { |
emilmont | 0:6149091f755d | 169 | int16_t acc; |
emilmont | 0:6149091f755d | 170 | uint8_t res[2]; |
samux | 1:d2630136d51e | 171 | readRegs(addr, res, 2); |
emilmont | 0:6149091f755d | 172 | |
emilmont | 0:6149091f755d | 173 | acc = (res[0] << 6) | (res[1] >> 2); |
emilmont | 0:6149091f755d | 174 | if (acc > UINT14_MAX/2) |
emilmont | 0:6149091f755d | 175 | acc -= UINT14_MAX; |
emilmont | 0:6149091f755d | 176 | |
emilmont | 0:6149091f755d | 177 | return acc; |
emilmont | 0:6149091f755d | 178 | } |
emilmont | 0:6149091f755d | 179 | |
samux | 1:d2630136d51e | 180 | void MMA8451Q::readRegs(int addr, uint8_t * data, int len) { |
emilmont | 0:6149091f755d | 181 | char t[1] = {addr}; |
emilmont | 0:6149091f755d | 182 | m_i2c.write(m_addr, t, 1, true); |
emilmont | 0:6149091f755d | 183 | m_i2c.read(m_addr, (char *)data, len); |
emilmont | 0:6149091f755d | 184 | } |
emilmont | 0:6149091f755d | 185 | |
samux | 1:d2630136d51e | 186 | void MMA8451Q::writeRegs(uint8_t * data, int len) { |
emilmont | 0:6149091f755d | 187 | m_i2c.write(m_addr, (char *)data, len); |
emilmont | 0:6149091f755d | 188 | } |