Llibrary for the WiGo MPL3115A2, I2C Precision Altimeter sensor.
Dependents: KL25Z_Batt_Test WIGO_MPL3115A2 Multi-Sensor SPACEmk2 ... more
30/05/2013 Added and tested the data acquisition using Interrupt. Added code for Altimeter trigger Interrupt but not yet tested.
Very basic library. Under development. Need to add in order: 1. IRQ configuration. 2. FIFO mode configuration.
MPL3115A2.cpp@2:a2fcfb7ff611, 2013-05-29 (annotated)
- Committer:
- clemente
- Date:
- Wed May 29 05:57:15 2013 +0000
- Revision:
- 2:a2fcfb7ff611
- Parent:
- 0:cfecfabc5e23
- Child:
- 3:a2f1752add9a
Streaming data using Interrupt. Not tested.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
clemente | 0:cfecfabc5e23 | 1 | #include "MPL3115A2.h" |
clemente | 0:cfecfabc5e23 | 2 | |
clemente | 2:a2fcfb7ff611 | 3 | #define REG_WHO_AM_I 0x0C // return 0xC4 by default |
clemente | 0:cfecfabc5e23 | 4 | #define REG_STATUS 0x00 |
clemente | 0:cfecfabc5e23 | 5 | #define REG_CTRL_REG_1 0x26 |
clemente | 2:a2fcfb7ff611 | 6 | #define REG_CTRL_REG_4 0x29 |
clemente | 2:a2fcfb7ff611 | 7 | #define REG_CTRL_REG_5 0x2A |
clemente | 0:cfecfabc5e23 | 8 | #define REG_PRESSURE_MSB 0x01 // 3 byte pressure data |
clemente | 0:cfecfabc5e23 | 9 | #define REG_ALTIMETER_MSB 0x01 // 3 byte altimeter data |
clemente | 0:cfecfabc5e23 | 10 | #define REG_TEMP_MSB 0x04 // 2 byte temperature data |
clemente | 0:cfecfabc5e23 | 11 | #define REG_PT_DATA_CFG 0x13 |
clemente | 0:cfecfabc5e23 | 12 | |
clemente | 0:cfecfabc5e23 | 13 | #define UINT14_MAX 16383 |
clemente | 0:cfecfabc5e23 | 14 | |
clemente | 2:a2fcfb7ff611 | 15 | void (*user2_fptr)(void); // Pointers to user function called after |
clemente | 2:a2fcfb7ff611 | 16 | void (*user1_fptr)(void); // IRQ assertion. |
clemente | 2:a2fcfb7ff611 | 17 | |
clemente | 2:a2fcfb7ff611 | 18 | // |
clemente | 2:a2fcfb7ff611 | 19 | InterruptIn MPL3115A2_Int1( PTD4); // INT1 |
clemente | 2:a2fcfb7ff611 | 20 | InterruptIn MPL3115A2_Int2( PTA12); // INT2 |
clemente | 2:a2fcfb7ff611 | 21 | |
clemente | 0:cfecfabc5e23 | 22 | MPL3115A2::MPL3115A2(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { |
clemente | 0:cfecfabc5e23 | 23 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 24 | MPL3115A2_oversampling = OVERSAMPLE_RATIO_1; |
clemente | 0:cfecfabc5e23 | 25 | } |
clemente | 0:cfecfabc5e23 | 26 | |
clemente | 2:a2fcfb7ff611 | 27 | void MPL3115A2::Reset( void) |
clemente | 2:a2fcfb7ff611 | 28 | { |
clemente | 2:a2fcfb7ff611 | 29 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 30 | |
clemente | 2:a2fcfb7ff611 | 31 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 32 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 2:a2fcfb7ff611 | 33 | unsigned char data[2] = { REG_CTRL_REG_1, t|0x04}; |
clemente | 2:a2fcfb7ff611 | 34 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 35 | wait( 0.1); |
clemente | 2:a2fcfb7ff611 | 36 | |
clemente | 2:a2fcfb7ff611 | 37 | } |
clemente | 2:a2fcfb7ff611 | 38 | |
clemente | 2:a2fcfb7ff611 | 39 | void MPL3115A2::DataReady( void(*fptr)(void), unsigned char OS) |
clemente | 2:a2fcfb7ff611 | 40 | { |
clemente | 2:a2fcfb7ff611 | 41 | unsigned char dt[5]; |
clemente | 2:a2fcfb7ff611 | 42 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 43 | |
clemente | 2:a2fcfb7ff611 | 44 | Reset(); |
clemente | 2:a2fcfb7ff611 | 45 | |
clemente | 2:a2fcfb7ff611 | 46 | /* |
clemente | 2:a2fcfb7ff611 | 47 | ** Read contents of CTRL_REG_1 |
clemente | 2:a2fcfb7ff611 | 48 | ** Clear SBYB mask while holding all other values of CTRL_REG_1. |
clemente | 2:a2fcfb7ff611 | 49 | ** To put part into Standby mode |
clemente | 2:a2fcfb7ff611 | 50 | */ |
clemente | 2:a2fcfb7ff611 | 51 | Standby(); |
clemente | 2:a2fcfb7ff611 | 52 | |
clemente | 2:a2fcfb7ff611 | 53 | /* |
clemente | 2:a2fcfb7ff611 | 54 | ** Clear all interrupts by reading the output registers. |
clemente | 2:a2fcfb7ff611 | 55 | ** Activate sensor in Altimeter mode. |
clemente | 2:a2fcfb7ff611 | 56 | */ |
clemente | 2:a2fcfb7ff611 | 57 | readRegs( REG_ALTIMETER_MSB, &dt[0], 5); |
clemente | 2:a2fcfb7ff611 | 58 | getStatus(); |
clemente | 2:a2fcfb7ff611 | 59 | // Enable Interrupt fot data ready |
clemente | 2:a2fcfb7ff611 | 60 | data[0] = REG_CTRL_REG_4; |
clemente | 2:a2fcfb7ff611 | 61 | data[1] = 0x80; |
clemente | 2:a2fcfb7ff611 | 62 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 63 | // Configure Interrupt route to INT2 |
clemente | 2:a2fcfb7ff611 | 64 | data[0] = REG_CTRL_REG_5; |
clemente | 2:a2fcfb7ff611 | 65 | data[1] = 0x00; |
clemente | 2:a2fcfb7ff611 | 66 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 67 | |
clemente | 2:a2fcfb7ff611 | 68 | /* |
clemente | 2:a2fcfb7ff611 | 69 | ** Write a 1 to the ALT and SBYB bits to go into Active Altimeter mode |
clemente | 2:a2fcfb7ff611 | 70 | */ |
clemente | 2:a2fcfb7ff611 | 71 | // Configure the OverSampling rate, Altimeter mode and set the sensor Active |
clemente | 2:a2fcfb7ff611 | 72 | data[0] = REG_CTRL_REG_1; |
clemente | 2:a2fcfb7ff611 | 73 | data[1] = 0x81 | (OS<<3); |
clemente | 2:a2fcfb7ff611 | 74 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 75 | |
clemente | 2:a2fcfb7ff611 | 76 | user2_fptr = fptr; |
clemente | 2:a2fcfb7ff611 | 77 | MPL3115A2_Int2.fall( this, &MPL3115A2::DataReady_IRQ); |
clemente | 2:a2fcfb7ff611 | 78 | |
clemente | 2:a2fcfb7ff611 | 79 | } |
clemente | 2:a2fcfb7ff611 | 80 | |
clemente | 2:a2fcfb7ff611 | 81 | void MPL3115A2::DataReady_IRQ( void) |
clemente | 2:a2fcfb7ff611 | 82 | { |
clemente | 2:a2fcfb7ff611 | 83 | // Clear the IRQ flag |
clemente | 2:a2fcfb7ff611 | 84 | getStatus(); |
clemente | 2:a2fcfb7ff611 | 85 | // Run the user supplied function |
clemente | 2:a2fcfb7ff611 | 86 | user2_fptr(); |
clemente | 2:a2fcfb7ff611 | 87 | } |
clemente | 2:a2fcfb7ff611 | 88 | |
clemente | 0:cfecfabc5e23 | 89 | void MPL3115A2::Barometric_Mode( void) |
clemente | 0:cfecfabc5e23 | 90 | { |
clemente | 0:cfecfabc5e23 | 91 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 92 | unsigned char data[2]; |
clemente | 0:cfecfabc5e23 | 93 | |
clemente | 0:cfecfabc5e23 | 94 | Standby(); |
clemente | 0:cfecfabc5e23 | 95 | |
clemente | 0:cfecfabc5e23 | 96 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 97 | Reset(); |
clemente | 2:a2fcfb7ff611 | 98 | |
clemente | 0:cfecfabc5e23 | 99 | Standby(); |
clemente | 0:cfecfabc5e23 | 100 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 101 | |
clemente | 2:a2fcfb7ff611 | 102 | // Set the Barometric mode |
clemente | 0:cfecfabc5e23 | 103 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 104 | data[1] = t&0x7F; |
clemente | 0:cfecfabc5e23 | 105 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 106 | |
clemente | 0:cfecfabc5e23 | 107 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 108 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 109 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 110 | |
clemente | 0:cfecfabc5e23 | 111 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 112 | |
clemente | 0:cfecfabc5e23 | 113 | Active(); |
clemente | 0:cfecfabc5e23 | 114 | |
clemente | 0:cfecfabc5e23 | 115 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 116 | } |
clemente | 0:cfecfabc5e23 | 117 | |
clemente | 0:cfecfabc5e23 | 118 | void MPL3115A2::Altimeter_Mode( void) |
clemente | 0:cfecfabc5e23 | 119 | { |
clemente | 0:cfecfabc5e23 | 120 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 121 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 122 | |
clemente | 0:cfecfabc5e23 | 123 | Standby(); |
clemente | 0:cfecfabc5e23 | 124 | |
clemente | 0:cfecfabc5e23 | 125 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 126 | Reset(); |
clemente | 0:cfecfabc5e23 | 127 | |
clemente | 0:cfecfabc5e23 | 128 | Standby(); |
clemente | 0:cfecfabc5e23 | 129 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 130 | |
clemente | 0:cfecfabc5e23 | 131 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 132 | data[1] = t|0x80; |
clemente | 0:cfecfabc5e23 | 133 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 134 | |
clemente | 0:cfecfabc5e23 | 135 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 136 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 137 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 138 | |
clemente | 0:cfecfabc5e23 | 139 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 140 | |
clemente | 0:cfecfabc5e23 | 141 | Active(); |
clemente | 0:cfecfabc5e23 | 142 | |
clemente | 0:cfecfabc5e23 | 143 | MPL3115A2_mode = ALTIMETER_MODE; |
clemente | 0:cfecfabc5e23 | 144 | } |
clemente | 0:cfecfabc5e23 | 145 | |
clemente | 0:cfecfabc5e23 | 146 | void MPL3115A2::Oversample_Ratio( unsigned int ratio) |
clemente | 0:cfecfabc5e23 | 147 | { |
clemente | 0:cfecfabc5e23 | 148 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 149 | |
clemente | 0:cfecfabc5e23 | 150 | Standby(); |
clemente | 0:cfecfabc5e23 | 151 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 152 | |
clemente | 0:cfecfabc5e23 | 153 | t = t & 0xE7; |
clemente | 0:cfecfabc5e23 | 154 | t = t | ( ratio<<3); |
clemente | 0:cfecfabc5e23 | 155 | |
clemente | 0:cfecfabc5e23 | 156 | unsigned char data[2] = { REG_CTRL_REG_1, t}; |
clemente | 0:cfecfabc5e23 | 157 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 158 | |
clemente | 0:cfecfabc5e23 | 159 | Active(); |
clemente | 0:cfecfabc5e23 | 160 | |
clemente | 0:cfecfabc5e23 | 161 | MPL3115A2_oversampling = ratio; |
clemente | 0:cfecfabc5e23 | 162 | } |
clemente | 0:cfecfabc5e23 | 163 | |
clemente | 0:cfecfabc5e23 | 164 | |
clemente | 0:cfecfabc5e23 | 165 | void MPL3115A2::Active( void) |
clemente | 0:cfecfabc5e23 | 166 | { |
clemente | 0:cfecfabc5e23 | 167 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 168 | |
clemente | 0:cfecfabc5e23 | 169 | // Activate the peripheral |
clemente | 0:cfecfabc5e23 | 170 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 171 | unsigned char data[2] = {REG_CTRL_REG_1, t|0x01}; |
clemente | 0:cfecfabc5e23 | 172 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 173 | } |
clemente | 0:cfecfabc5e23 | 174 | |
clemente | 0:cfecfabc5e23 | 175 | void MPL3115A2::Standby( void) |
clemente | 0:cfecfabc5e23 | 176 | { |
clemente | 0:cfecfabc5e23 | 177 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 178 | |
clemente | 0:cfecfabc5e23 | 179 | // Standby |
clemente | 0:cfecfabc5e23 | 180 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 181 | unsigned char data[2] = {REG_CTRL_REG_1, t&0xFE}; |
clemente | 0:cfecfabc5e23 | 182 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 183 | } |
clemente | 0:cfecfabc5e23 | 184 | |
clemente | 0:cfecfabc5e23 | 185 | unsigned char MPL3115A2::getDeviceID() { |
clemente | 0:cfecfabc5e23 | 186 | unsigned char device_id = 0; |
clemente | 0:cfecfabc5e23 | 187 | readRegs(REG_WHO_AM_I, &device_id, 1); |
clemente | 0:cfecfabc5e23 | 188 | return device_id; |
clemente | 0:cfecfabc5e23 | 189 | } |
clemente | 0:cfecfabc5e23 | 190 | |
clemente | 0:cfecfabc5e23 | 191 | unsigned int MPL3115A2::isDataAvailable( void) |
clemente | 0:cfecfabc5e23 | 192 | { |
clemente | 0:cfecfabc5e23 | 193 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 194 | |
clemente | 0:cfecfabc5e23 | 195 | readRegs( REG_STATUS, &status, 1); |
clemente | 0:cfecfabc5e23 | 196 | |
clemente | 0:cfecfabc5e23 | 197 | if ( status & 0x08) { |
clemente | 0:cfecfabc5e23 | 198 | return 1; |
clemente | 0:cfecfabc5e23 | 199 | } else { |
clemente | 0:cfecfabc5e23 | 200 | return 0; |
clemente | 0:cfecfabc5e23 | 201 | } |
clemente | 0:cfecfabc5e23 | 202 | |
clemente | 0:cfecfabc5e23 | 203 | } |
clemente | 0:cfecfabc5e23 | 204 | |
clemente | 0:cfecfabc5e23 | 205 | unsigned char MPL3115A2::getStatus( void) |
clemente | 0:cfecfabc5e23 | 206 | { |
clemente | 0:cfecfabc5e23 | 207 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 208 | |
clemente | 0:cfecfabc5e23 | 209 | readRegs( REG_STATUS, &status, 1); |
clemente | 0:cfecfabc5e23 | 210 | return status; |
clemente | 0:cfecfabc5e23 | 211 | } |
clemente | 0:cfecfabc5e23 | 212 | |
clemente | 0:cfecfabc5e23 | 213 | void MPL3115A2::getAllData( float *f) |
clemente | 0:cfecfabc5e23 | 214 | { |
clemente | 0:cfecfabc5e23 | 215 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 0:cfecfabc5e23 | 216 | f[0] = getAltimeter(); |
clemente | 0:cfecfabc5e23 | 217 | } else { |
clemente | 0:cfecfabc5e23 | 218 | f[0] = getPressure(); |
clemente | 0:cfecfabc5e23 | 219 | } |
clemente | 0:cfecfabc5e23 | 220 | |
clemente | 0:cfecfabc5e23 | 221 | f[1] = getTemperature(); |
clemente | 0:cfecfabc5e23 | 222 | } |
clemente | 0:cfecfabc5e23 | 223 | |
clemente | 0:cfecfabc5e23 | 224 | float MPL3115A2::getAltimeter( void) |
clemente | 0:cfecfabc5e23 | 225 | { |
clemente | 0:cfecfabc5e23 | 226 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 227 | unsigned short altm; |
clemente | 0:cfecfabc5e23 | 228 | float faltm; |
clemente | 0:cfecfabc5e23 | 229 | |
clemente | 0:cfecfabc5e23 | 230 | /* |
clemente | 0:cfecfabc5e23 | 231 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 232 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 233 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 234 | */ |
clemente | 0:cfecfabc5e23 | 235 | readRegs( REG_ALTIMETER_MSB, &dt[0], 3); |
clemente | 0:cfecfabc5e23 | 236 | altm = (dt[0]<<8) | dt[1]; |
clemente | 0:cfecfabc5e23 | 237 | // |
clemente | 0:cfecfabc5e23 | 238 | if ( dt[0] > 0x7F) { |
clemente | 0:cfecfabc5e23 | 239 | altm = ~altm + 1; |
clemente | 0:cfecfabc5e23 | 240 | faltm = (float)altm * -1.0f; |
clemente | 0:cfecfabc5e23 | 241 | } else { |
clemente | 0:cfecfabc5e23 | 242 | faltm = (float)altm * 1.0f; |
clemente | 0:cfecfabc5e23 | 243 | } |
clemente | 0:cfecfabc5e23 | 244 | // |
clemente | 0:cfecfabc5e23 | 245 | faltm = faltm+((float)(dt[2]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 246 | return faltm; |
clemente | 0:cfecfabc5e23 | 247 | } |
clemente | 0:cfecfabc5e23 | 248 | |
clemente | 0:cfecfabc5e23 | 249 | float MPL3115A2::getPressure( void) |
clemente | 0:cfecfabc5e23 | 250 | { |
clemente | 0:cfecfabc5e23 | 251 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 252 | unsigned int prs; |
clemente | 0:cfecfabc5e23 | 253 | float fprs; |
clemente | 0:cfecfabc5e23 | 254 | |
clemente | 0:cfecfabc5e23 | 255 | /* |
clemente | 0:cfecfabc5e23 | 256 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 257 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 258 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 259 | */ |
clemente | 0:cfecfabc5e23 | 260 | readRegs( REG_PRESSURE_MSB, &dt[0], 3); |
clemente | 0:cfecfabc5e23 | 261 | prs = (dt[0]<<10) | (dt[1]<<2) | (dt[2]>>6); |
clemente | 0:cfecfabc5e23 | 262 | // |
clemente | 0:cfecfabc5e23 | 263 | fprs = (float)prs * 1.0f; |
clemente | 0:cfecfabc5e23 | 264 | |
clemente | 0:cfecfabc5e23 | 265 | if ( dt[2] & 0x20) |
clemente | 0:cfecfabc5e23 | 266 | fprs += 0.25f; |
clemente | 0:cfecfabc5e23 | 267 | if ( dt[2] & 0x10) |
clemente | 0:cfecfabc5e23 | 268 | fprs += 0.5f; |
clemente | 0:cfecfabc5e23 | 269 | |
clemente | 0:cfecfabc5e23 | 270 | return fprs; |
clemente | 0:cfecfabc5e23 | 271 | } |
clemente | 0:cfecfabc5e23 | 272 | |
clemente | 0:cfecfabc5e23 | 273 | |
clemente | 0:cfecfabc5e23 | 274 | float MPL3115A2::getTemperature( void) |
clemente | 0:cfecfabc5e23 | 275 | { |
clemente | 0:cfecfabc5e23 | 276 | unsigned char dt[2]; |
clemente | 0:cfecfabc5e23 | 277 | unsigned short temp; |
clemente | 0:cfecfabc5e23 | 278 | float ftemp; |
clemente | 0:cfecfabc5e23 | 279 | |
clemente | 0:cfecfabc5e23 | 280 | /* |
clemente | 0:cfecfabc5e23 | 281 | * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 282 | * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4) |
clemente | 0:cfecfabc5e23 | 283 | */ |
clemente | 0:cfecfabc5e23 | 284 | readRegs( REG_TEMP_MSB, &dt[0], 2); |
clemente | 0:cfecfabc5e23 | 285 | temp = dt[0]; |
clemente | 0:cfecfabc5e23 | 286 | // |
clemente | 0:cfecfabc5e23 | 287 | if ( dt[0] > 0x7F) { |
clemente | 0:cfecfabc5e23 | 288 | temp = ~temp + 1; |
clemente | 0:cfecfabc5e23 | 289 | ftemp = (float)temp * -1.0f; |
clemente | 0:cfecfabc5e23 | 290 | } else { |
clemente | 0:cfecfabc5e23 | 291 | ftemp = (float)temp * 1.0f; |
clemente | 0:cfecfabc5e23 | 292 | } |
clemente | 0:cfecfabc5e23 | 293 | // |
clemente | 0:cfecfabc5e23 | 294 | ftemp = ftemp+((float)(dt[1]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 295 | return ftemp; |
clemente | 0:cfecfabc5e23 | 296 | |
clemente | 0:cfecfabc5e23 | 297 | } |
clemente | 0:cfecfabc5e23 | 298 | |
clemente | 0:cfecfabc5e23 | 299 | void MPL3115A2::readRegs(int addr, uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 300 | char t[1] = {addr}; |
clemente | 0:cfecfabc5e23 | 301 | m_i2c.write(m_addr, t, 1, true); |
clemente | 0:cfecfabc5e23 | 302 | m_i2c.read(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 303 | } |
clemente | 0:cfecfabc5e23 | 304 | |
clemente | 0:cfecfabc5e23 | 305 | void MPL3115A2::writeRegs(uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 306 | m_i2c.write(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 307 | } |