hellomqttt to thingspeak mqtt and ifttt
Dependencies: Servo MQTTPacket FP
MMA7660/MMA7660.cpp@25:ca1b1098c77f, 2021-05-05 (annotated)
- Committer:
- jasonberry
- Date:
- Wed May 05 14:48:01 2021 +0000
- Revision:
- 25:ca1b1098c77f
TEST
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jasonberry | 25:ca1b1098c77f | 1 | #include "MMA7660.h" |
jasonberry | 25:ca1b1098c77f | 2 | |
jasonberry | 25:ca1b1098c77f | 3 | MMA7660::MMA7660(PinName sda, PinName scl, bool active) : _i2c(sda, scl) |
jasonberry | 25:ca1b1098c77f | 4 | { |
jasonberry | 25:ca1b1098c77f | 5 | setActive(active); |
jasonberry | 25:ca1b1098c77f | 6 | samplerate = 64; |
jasonberry | 25:ca1b1098c77f | 7 | } |
jasonberry | 25:ca1b1098c77f | 8 | |
jasonberry | 25:ca1b1098c77f | 9 | //Since the MMA lacks a WHO_AM_I register, we can only check if there is a device that answers to the I2C address |
jasonberry | 25:ca1b1098c77f | 10 | bool MMA7660::testConnection( void ) |
jasonberry | 25:ca1b1098c77f | 11 | { |
jasonberry | 25:ca1b1098c77f | 12 | if (_i2c.write(MMA7660_ADDRESS, NULL, 0) == 0 ) |
jasonberry | 25:ca1b1098c77f | 13 | return true; |
jasonberry | 25:ca1b1098c77f | 14 | else |
jasonberry | 25:ca1b1098c77f | 15 | return false; |
jasonberry | 25:ca1b1098c77f | 16 | } |
jasonberry | 25:ca1b1098c77f | 17 | |
jasonberry | 25:ca1b1098c77f | 18 | void MMA7660::setActive(bool state) |
jasonberry | 25:ca1b1098c77f | 19 | { |
jasonberry | 25:ca1b1098c77f | 20 | active = state; |
jasonberry | 25:ca1b1098c77f | 21 | char modereg = read(MMA7660_MODE_R); |
jasonberry | 25:ca1b1098c77f | 22 | modereg &= ~(1<<0); |
jasonberry | 25:ca1b1098c77f | 23 | |
jasonberry | 25:ca1b1098c77f | 24 | //If it somehow was in testmode, disable that |
jasonberry | 25:ca1b1098c77f | 25 | if (modereg && (1<<2)) { |
jasonberry | 25:ca1b1098c77f | 26 | modereg &= ~(1<<2); |
jasonberry | 25:ca1b1098c77f | 27 | write(MMA7660_MODE_R, modereg); |
jasonberry | 25:ca1b1098c77f | 28 | } |
jasonberry | 25:ca1b1098c77f | 29 | |
jasonberry | 25:ca1b1098c77f | 30 | modereg += state; |
jasonberry | 25:ca1b1098c77f | 31 | write(MMA7660_MODE_R, modereg); |
jasonberry | 25:ca1b1098c77f | 32 | } |
jasonberry | 25:ca1b1098c77f | 33 | |
jasonberry | 25:ca1b1098c77f | 34 | void MMA7660::readData(int *data) |
jasonberry | 25:ca1b1098c77f | 35 | { |
jasonberry | 25:ca1b1098c77f | 36 | bool active_old = active; |
jasonberry | 25:ca1b1098c77f | 37 | if (!active) { |
jasonberry | 25:ca1b1098c77f | 38 | setActive(true); |
jasonberry | 25:ca1b1098c77f | 39 | wait(0.012 + 1/samplerate); //Wait until new sample is ready, my experience is that 1/samplerate isnt needed, but datasheet says so |
jasonberry | 25:ca1b1098c77f | 40 | } |
jasonberry | 25:ca1b1098c77f | 41 | |
jasonberry | 25:ca1b1098c77f | 42 | char temp[3]; |
jasonberry | 25:ca1b1098c77f | 43 | bool alert; |
jasonberry | 25:ca1b1098c77f | 44 | |
jasonberry | 25:ca1b1098c77f | 45 | do { |
jasonberry | 25:ca1b1098c77f | 46 | alert = false; |
jasonberry | 25:ca1b1098c77f | 47 | read(MMA7660_XOUT_R, temp, 3); |
jasonberry | 25:ca1b1098c77f | 48 | for (int i = 0; i<3; i++) { |
jasonberry | 25:ca1b1098c77f | 49 | if (temp[i] > 63) |
jasonberry | 25:ca1b1098c77f | 50 | alert = true; |
jasonberry | 25:ca1b1098c77f | 51 | if (temp[i] > 31) |
jasonberry | 25:ca1b1098c77f | 52 | temp[i] += 128+64; |
jasonberry | 25:ca1b1098c77f | 53 | data[i] = (signed char)temp[i]; |
jasonberry | 25:ca1b1098c77f | 54 | } |
jasonberry | 25:ca1b1098c77f | 55 | } while (alert); |
jasonberry | 25:ca1b1098c77f | 56 | |
jasonberry | 25:ca1b1098c77f | 57 | if (!active_old) |
jasonberry | 25:ca1b1098c77f | 58 | setActive(false); |
jasonberry | 25:ca1b1098c77f | 59 | } |
jasonberry | 25:ca1b1098c77f | 60 | |
jasonberry | 25:ca1b1098c77f | 61 | |
jasonberry | 25:ca1b1098c77f | 62 | void MMA7660::readData(float *data) |
jasonberry | 25:ca1b1098c77f | 63 | { |
jasonberry | 25:ca1b1098c77f | 64 | int intdata[3]; |
jasonberry | 25:ca1b1098c77f | 65 | readData(intdata); |
jasonberry | 25:ca1b1098c77f | 66 | for (int i = 0; i<3; i++) |
jasonberry | 25:ca1b1098c77f | 67 | data[i] = intdata[i]/MMA7660_SENSITIVITY; |
jasonberry | 25:ca1b1098c77f | 68 | } |
jasonberry | 25:ca1b1098c77f | 69 | |
jasonberry | 25:ca1b1098c77f | 70 | float MMA7660::x( void ) |
jasonberry | 25:ca1b1098c77f | 71 | { |
jasonberry | 25:ca1b1098c77f | 72 | return getSingle(0); |
jasonberry | 25:ca1b1098c77f | 73 | } |
jasonberry | 25:ca1b1098c77f | 74 | |
jasonberry | 25:ca1b1098c77f | 75 | float MMA7660::y( void ) |
jasonberry | 25:ca1b1098c77f | 76 | { |
jasonberry | 25:ca1b1098c77f | 77 | return getSingle(1); |
jasonberry | 25:ca1b1098c77f | 78 | } |
jasonberry | 25:ca1b1098c77f | 79 | |
jasonberry | 25:ca1b1098c77f | 80 | float MMA7660::z( void ) |
jasonberry | 25:ca1b1098c77f | 81 | { |
jasonberry | 25:ca1b1098c77f | 82 | return getSingle(2); |
jasonberry | 25:ca1b1098c77f | 83 | } |
jasonberry | 25:ca1b1098c77f | 84 | |
jasonberry | 25:ca1b1098c77f | 85 | |
jasonberry | 25:ca1b1098c77f | 86 | void MMA7660::setSampleRate(int samplerate) |
jasonberry | 25:ca1b1098c77f | 87 | { |
jasonberry | 25:ca1b1098c77f | 88 | bool active_old = active; |
jasonberry | 25:ca1b1098c77f | 89 | setActive(false); //Not allowed to be active to change anything |
jasonberry | 25:ca1b1098c77f | 90 | int rates[] = {120, 64, 32, 16, 8, 4, 2, 1}; //Alowed samplerates (and their number in array is also number required for MMA) |
jasonberry | 25:ca1b1098c77f | 91 | int sampleLoc = 0, sampleError = 10000, temp; |
jasonberry | 25:ca1b1098c77f | 92 | for (int i = 0; i<8; i++) { |
jasonberry | 25:ca1b1098c77f | 93 | temp = abs( rates[i] - samplerate ); |
jasonberry | 25:ca1b1098c77f | 94 | if (temp<sampleError) { |
jasonberry | 25:ca1b1098c77f | 95 | sampleLoc = i; |
jasonberry | 25:ca1b1098c77f | 96 | sampleError=temp; |
jasonberry | 25:ca1b1098c77f | 97 | } |
jasonberry | 25:ca1b1098c77f | 98 | } |
jasonberry | 25:ca1b1098c77f | 99 | |
jasonberry | 25:ca1b1098c77f | 100 | //Update the samplerate reg |
jasonberry | 25:ca1b1098c77f | 101 | temp = read(MMA7660_SR_R); |
jasonberry | 25:ca1b1098c77f | 102 | temp &= ~0x07; //Awake sample rate are lowest 3 bit |
jasonberry | 25:ca1b1098c77f | 103 | temp |= sampleLoc; |
jasonberry | 25:ca1b1098c77f | 104 | write(MMA7660_SR_R, temp); |
jasonberry | 25:ca1b1098c77f | 105 | this->samplerate = rates[sampleLoc]; |
jasonberry | 25:ca1b1098c77f | 106 | setActive(active_old); //Restore previous active state |
jasonberry | 25:ca1b1098c77f | 107 | } |
jasonberry | 25:ca1b1098c77f | 108 | |
jasonberry | 25:ca1b1098c77f | 109 | |
jasonberry | 25:ca1b1098c77f | 110 | MMA7660::Orientation MMA7660::getSide( void ) |
jasonberry | 25:ca1b1098c77f | 111 | { |
jasonberry | 25:ca1b1098c77f | 112 | char tiltreg = read(MMA7660_TILT_R); |
jasonberry | 25:ca1b1098c77f | 113 | //We care about 2 LSBs |
jasonberry | 25:ca1b1098c77f | 114 | tiltreg &= 0x03; |
jasonberry | 25:ca1b1098c77f | 115 | if (tiltreg == 0x01) |
jasonberry | 25:ca1b1098c77f | 116 | return MMA7660::Front; |
jasonberry | 25:ca1b1098c77f | 117 | if (tiltreg == 0x02) |
jasonberry | 25:ca1b1098c77f | 118 | return MMA7660::Back; |
jasonberry | 25:ca1b1098c77f | 119 | return MMA7660::Unknown; |
jasonberry | 25:ca1b1098c77f | 120 | } |
jasonberry | 25:ca1b1098c77f | 121 | |
jasonberry | 25:ca1b1098c77f | 122 | MMA7660::Orientation MMA7660::getOrientation( void ) |
jasonberry | 25:ca1b1098c77f | 123 | { |
jasonberry | 25:ca1b1098c77f | 124 | char tiltreg = read(MMA7660_TILT_R); |
jasonberry | 25:ca1b1098c77f | 125 | |
jasonberry | 25:ca1b1098c77f | 126 | //We care about bit 2, 3 and 4 (counting from zero) |
jasonberry | 25:ca1b1098c77f | 127 | tiltreg &= 0x07<<2; |
jasonberry | 25:ca1b1098c77f | 128 | tiltreg >>= 2; |
jasonberry | 25:ca1b1098c77f | 129 | if (tiltreg == 0x01) |
jasonberry | 25:ca1b1098c77f | 130 | return MMA7660::Left; |
jasonberry | 25:ca1b1098c77f | 131 | if (tiltreg == 0x02) |
jasonberry | 25:ca1b1098c77f | 132 | return MMA7660::Right; |
jasonberry | 25:ca1b1098c77f | 133 | if (tiltreg == 0x05) |
jasonberry | 25:ca1b1098c77f | 134 | return MMA7660::Down; |
jasonberry | 25:ca1b1098c77f | 135 | if (tiltreg == 0x06) |
jasonberry | 25:ca1b1098c77f | 136 | return MMA7660::Up; |
jasonberry | 25:ca1b1098c77f | 137 | return MMA7660::Unknown; |
jasonberry | 25:ca1b1098c77f | 138 | } |
jasonberry | 25:ca1b1098c77f | 139 | |
jasonberry | 25:ca1b1098c77f | 140 | |
jasonberry | 25:ca1b1098c77f | 141 | |
jasonberry | 25:ca1b1098c77f | 142 | ////////////////////////////////////////////// |
jasonberry | 25:ca1b1098c77f | 143 | ///////////////PRIVATE//////////////////////// |
jasonberry | 25:ca1b1098c77f | 144 | ////////////////////////////////////////////// |
jasonberry | 25:ca1b1098c77f | 145 | |
jasonberry | 25:ca1b1098c77f | 146 | |
jasonberry | 25:ca1b1098c77f | 147 | void MMA7660::write(char address, char data) |
jasonberry | 25:ca1b1098c77f | 148 | { |
jasonberry | 25:ca1b1098c77f | 149 | char temp[2]; |
jasonberry | 25:ca1b1098c77f | 150 | temp[0]=address; |
jasonberry | 25:ca1b1098c77f | 151 | temp[1]=data; |
jasonberry | 25:ca1b1098c77f | 152 | |
jasonberry | 25:ca1b1098c77f | 153 | _i2c.write(MMA7660_ADDRESS, temp, 2); |
jasonberry | 25:ca1b1098c77f | 154 | } |
jasonberry | 25:ca1b1098c77f | 155 | |
jasonberry | 25:ca1b1098c77f | 156 | char MMA7660::read(char address) |
jasonberry | 25:ca1b1098c77f | 157 | { |
jasonberry | 25:ca1b1098c77f | 158 | char retval; |
jasonberry | 25:ca1b1098c77f | 159 | _i2c.write(MMA7660_ADDRESS, &address, 1, true); |
jasonberry | 25:ca1b1098c77f | 160 | _i2c.read(MMA7660_ADDRESS, &retval, 1); |
jasonberry | 25:ca1b1098c77f | 161 | return retval; |
jasonberry | 25:ca1b1098c77f | 162 | } |
jasonberry | 25:ca1b1098c77f | 163 | |
jasonberry | 25:ca1b1098c77f | 164 | void MMA7660::read(char address, char *data, int length) |
jasonberry | 25:ca1b1098c77f | 165 | { |
jasonberry | 25:ca1b1098c77f | 166 | _i2c.write(MMA7660_ADDRESS, &address, 1, true); |
jasonberry | 25:ca1b1098c77f | 167 | _i2c.read(MMA7660_ADDRESS, data, length); |
jasonberry | 25:ca1b1098c77f | 168 | } |
jasonberry | 25:ca1b1098c77f | 169 | |
jasonberry | 25:ca1b1098c77f | 170 | float MMA7660::getSingle( int number ) |
jasonberry | 25:ca1b1098c77f | 171 | { |
jasonberry | 25:ca1b1098c77f | 172 | bool active_old = active; |
jasonberry | 25:ca1b1098c77f | 173 | if (!active) { |
jasonberry | 25:ca1b1098c77f | 174 | setActive(true); |
jasonberry | 25:ca1b1098c77f | 175 | wait(0.012 + 1/samplerate); //Wait until new sample is ready |
jasonberry | 25:ca1b1098c77f | 176 | } |
jasonberry | 25:ca1b1098c77f | 177 | |
jasonberry | 25:ca1b1098c77f | 178 | signed char temp; |
jasonberry | 25:ca1b1098c77f | 179 | bool alert; |
jasonberry | 25:ca1b1098c77f | 180 | |
jasonberry | 25:ca1b1098c77f | 181 | do { |
jasonberry | 25:ca1b1098c77f | 182 | alert = false; |
jasonberry | 25:ca1b1098c77f | 183 | temp = read(MMA7660_XOUT_R + number); |
jasonberry | 25:ca1b1098c77f | 184 | if (temp > 63) |
jasonberry | 25:ca1b1098c77f | 185 | alert = true; |
jasonberry | 25:ca1b1098c77f | 186 | if (temp > 31) |
jasonberry | 25:ca1b1098c77f | 187 | temp += 128+64; |
jasonberry | 25:ca1b1098c77f | 188 | } while (alert); |
jasonberry | 25:ca1b1098c77f | 189 | |
jasonberry | 25:ca1b1098c77f | 190 | if (!active_old) |
jasonberry | 25:ca1b1098c77f | 191 | setActive(false); |
jasonberry | 25:ca1b1098c77f | 192 | |
jasonberry | 25:ca1b1098c77f | 193 | return temp / MMA7660_SENSITIVITY; |
jasonberry | 25:ca1b1098c77f | 194 | } |