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@9:75a5960adf5c, 2013-09-22 (annotated)
- Committer:
- clemente
- Date:
- Sun Sep 22 11:17:28 2013 +0000
- Revision:
- 9:75a5960adf5c
- Parent:
- 8:89ed6aeb5dbb
- Child:
- 10:82ac06669316
Added function to read the maximum and minimum value captured. Some modification to the internal function.
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 | 4:fdf14a259af8 | 6 | #define REG_CTRL_REG_3 0x28 |
clemente | 2:a2fcfb7ff611 | 7 | #define REG_CTRL_REG_4 0x29 |
clemente | 2:a2fcfb7ff611 | 8 | #define REG_CTRL_REG_5 0x2A |
clemente | 0:cfecfabc5e23 | 9 | #define REG_PRESSURE_MSB 0x01 // 3 byte pressure data |
clemente | 0:cfecfabc5e23 | 10 | #define REG_ALTIMETER_MSB 0x01 // 3 byte altimeter data |
clemente | 0:cfecfabc5e23 | 11 | #define REG_TEMP_MSB 0x04 // 2 byte temperature data |
clemente | 0:cfecfabc5e23 | 12 | #define REG_PT_DATA_CFG 0x13 |
clemente | 3:a2f1752add9a | 13 | #define REG_P_TGT_MSB 0x16 |
clemente | 3:a2f1752add9a | 14 | #define REG_P_WND_MSB 0x19 |
clemente | 9:75a5960adf5c | 15 | #define REG_OFF_P 0x2b |
clemente | 9:75a5960adf5c | 16 | #define REG_OFF_T 0x2c |
clemente | 9:75a5960adf5c | 17 | #define REG_OFF_H 0x2d |
clemente | 9:75a5960adf5c | 18 | #define REG_PRES_MIN_MSB 0x1c |
clemente | 9:75a5960adf5c | 19 | #define REG_ALTI_MIN_MSB 0x1c |
clemente | 9:75a5960adf5c | 20 | #define REG_TEMP_MIN_MSB 0x1f |
clemente | 9:75a5960adf5c | 21 | #define REG_PRES_MAX_MSB 0x21 |
clemente | 9:75a5960adf5c | 22 | #define REG_ALTI_MAX_MSB 0x21 |
clemente | 9:75a5960adf5c | 23 | #define REG_TEMP_MAX_MSB 0x24 |
clemente | 0:cfecfabc5e23 | 24 | |
clemente | 0:cfecfabc5e23 | 25 | #define UINT14_MAX 16383 |
clemente | 0:cfecfabc5e23 | 26 | |
clemente | 6:03c24251e500 | 27 | // Status flag for data ready. |
clemente | 6:03c24251e500 | 28 | #define PTDR_STATUS 0x03 // Pressure Altitude and Temperature ready |
clemente | 6:03c24251e500 | 29 | #define PDR_STATUS 0x02 // Pressure and Altitude data ready |
clemente | 6:03c24251e500 | 30 | #define TDR_STATUS 0x01 // Temperature data ready |
clemente | 6:03c24251e500 | 31 | |
clemente | 3:a2f1752add9a | 32 | /** Interrupt schema |
clemente | 3:a2f1752add9a | 33 | * |
clemente | 3:a2f1752add9a | 34 | * :: The Altitude Trigger use the IRQ1. |
clemente | 3:a2f1752add9a | 35 | * |
clemente | 7:59e9ba115d0a | 36 | * Altitude Trigger -- MPL3115A2_Int1.fall --- AltitudeTrg_IRQ --- MPL3115A2_usr1_fptr |
clemente | 3:a2f1752add9a | 37 | * |
clemente | 3:a2f1752add9a | 38 | * |
clemente | 3:a2f1752add9a | 39 | * :: The Data ready use the IRQ2. |
clemente | 3:a2f1752add9a | 40 | * |
clemente | 7:59e9ba115d0a | 41 | * Data Ready -- MPL3115A2_Int2.fall --- DataReady_IRQ --- MPL3115A2_usr2_fptr |
clemente | 3:a2f1752add9a | 42 | * |
clemente | 3:a2f1752add9a | 43 | */ |
clemente | 7:59e9ba115d0a | 44 | void (*MPL3115A2_usr2_fptr)(void); // Pointers to user function called after |
clemente | 7:59e9ba115d0a | 45 | void (*MPL3115A2_usr1_fptr)(void); // IRQ assertion. |
clemente | 2:a2fcfb7ff611 | 46 | |
clemente | 2:a2fcfb7ff611 | 47 | // |
clemente | 2:a2fcfb7ff611 | 48 | InterruptIn MPL3115A2_Int1( PTD4); // INT1 |
clemente | 2:a2fcfb7ff611 | 49 | InterruptIn MPL3115A2_Int2( PTA12); // INT2 |
clemente | 2:a2fcfb7ff611 | 50 | |
clemente | 0:cfecfabc5e23 | 51 | MPL3115A2::MPL3115A2(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { |
clemente | 9:75a5960adf5c | 52 | unsigned char data[6]; |
clemente | 9:75a5960adf5c | 53 | |
clemente | 0:cfecfabc5e23 | 54 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 55 | MPL3115A2_oversampling = OVERSAMPLE_RATIO_1; |
clemente | 4:fdf14a259af8 | 56 | // |
clemente | 7:59e9ba115d0a | 57 | MPL3115A2_usr1_fptr = NULL; |
clemente | 7:59e9ba115d0a | 58 | MPL3115A2_usr2_fptr = NULL; |
clemente | 4:fdf14a259af8 | 59 | MPL3115A2_Int1.fall( NULL); |
clemente | 4:fdf14a259af8 | 60 | MPL3115A2_Int2.fall( NULL); |
clemente | 8:89ed6aeb5dbb | 61 | |
clemente | 8:89ed6aeb5dbb | 62 | Reset(); |
clemente | 9:75a5960adf5c | 63 | |
clemente | 9:75a5960adf5c | 64 | data[0]=REG_PRES_MIN_MSB; |
clemente | 9:75a5960adf5c | 65 | data[1]=0;data[2]=0;data[3]=0;data[4]=0;data[5]=0; |
clemente | 9:75a5960adf5c | 66 | writeRegs( &data[0], 6); |
clemente | 0:cfecfabc5e23 | 67 | } |
clemente | 0:cfecfabc5e23 | 68 | |
clemente | 2:a2fcfb7ff611 | 69 | void MPL3115A2::Reset( void) |
clemente | 2:a2fcfb7ff611 | 70 | { |
clemente | 2:a2fcfb7ff611 | 71 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 72 | |
clemente | 2:a2fcfb7ff611 | 73 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 74 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 2:a2fcfb7ff611 | 75 | unsigned char data[2] = { REG_CTRL_REG_1, t|0x04}; |
clemente | 2:a2fcfb7ff611 | 76 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 77 | wait( 0.1); |
clemente | 2:a2fcfb7ff611 | 78 | |
clemente | 2:a2fcfb7ff611 | 79 | } |
clemente | 2:a2fcfb7ff611 | 80 | |
clemente | 2:a2fcfb7ff611 | 81 | void MPL3115A2::DataReady( void(*fptr)(void), unsigned char OS) |
clemente | 2:a2fcfb7ff611 | 82 | { |
clemente | 2:a2fcfb7ff611 | 83 | unsigned char dt[5]; |
clemente | 2:a2fcfb7ff611 | 84 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 85 | |
clemente | 4:fdf14a259af8 | 86 | // Soft Reset |
clemente | 2:a2fcfb7ff611 | 87 | Reset(); |
clemente | 2:a2fcfb7ff611 | 88 | |
clemente | 2:a2fcfb7ff611 | 89 | Standby(); |
clemente | 2:a2fcfb7ff611 | 90 | |
clemente | 4:fdf14a259af8 | 91 | // Clear all interrupts by reading the output registers. |
clemente | 2:a2fcfb7ff611 | 92 | readRegs( REG_ALTIMETER_MSB, &dt[0], 5); |
clemente | 2:a2fcfb7ff611 | 93 | getStatus(); |
clemente | 4:fdf14a259af8 | 94 | // Configure INT active low and pullup |
clemente | 4:fdf14a259af8 | 95 | data[0] = REG_CTRL_REG_3; |
clemente | 4:fdf14a259af8 | 96 | data[1] = 0x00; |
clemente | 4:fdf14a259af8 | 97 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 98 | // Enable Interrupt fot data ready |
clemente | 2:a2fcfb7ff611 | 99 | data[0] = REG_CTRL_REG_4; |
clemente | 2:a2fcfb7ff611 | 100 | data[1] = 0x80; |
clemente | 2:a2fcfb7ff611 | 101 | writeRegs(data, 2); |
clemente | 3:a2f1752add9a | 102 | // Configure Interrupt to route to INT2 |
clemente | 2:a2fcfb7ff611 | 103 | data[0] = REG_CTRL_REG_5; |
clemente | 2:a2fcfb7ff611 | 104 | data[1] = 0x00; |
clemente | 2:a2fcfb7ff611 | 105 | writeRegs(data, 2); |
clemente | 4:fdf14a259af8 | 106 | data[0] = REG_PT_DATA_CFG; |
clemente | 4:fdf14a259af8 | 107 | data[1] = 0x07; |
clemente | 4:fdf14a259af8 | 108 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 109 | |
clemente | 4:fdf14a259af8 | 110 | // Configure the OverSampling rate, Altimeter/Barometer mode and set the sensor Active |
clemente | 2:a2fcfb7ff611 | 111 | data[0] = REG_CTRL_REG_1; |
clemente | 4:fdf14a259af8 | 112 | data[1] = (OS<<3); |
clemente | 4:fdf14a259af8 | 113 | // |
clemente | 4:fdf14a259af8 | 114 | if (MPL3115A2_mode == BAROMETRIC_MODE) |
clemente | 4:fdf14a259af8 | 115 | data[1] &= 0x7F; |
clemente | 4:fdf14a259af8 | 116 | else |
clemente | 4:fdf14a259af8 | 117 | data[1] |= 0x80; |
clemente | 4:fdf14a259af8 | 118 | // |
clemente | 4:fdf14a259af8 | 119 | data[1] |= 0x01; |
clemente | 2:a2fcfb7ff611 | 120 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 121 | |
clemente | 7:59e9ba115d0a | 122 | MPL3115A2_usr2_fptr = fptr; |
clemente | 2:a2fcfb7ff611 | 123 | MPL3115A2_Int2.fall( this, &MPL3115A2::DataReady_IRQ); |
clemente | 2:a2fcfb7ff611 | 124 | |
clemente | 2:a2fcfb7ff611 | 125 | } |
clemente | 2:a2fcfb7ff611 | 126 | |
clemente | 2:a2fcfb7ff611 | 127 | void MPL3115A2::DataReady_IRQ( void) |
clemente | 2:a2fcfb7ff611 | 128 | { |
clemente | 2:a2fcfb7ff611 | 129 | // Clear the IRQ flag |
clemente | 2:a2fcfb7ff611 | 130 | getStatus(); |
clemente | 2:a2fcfb7ff611 | 131 | // Run the user supplied function |
clemente | 7:59e9ba115d0a | 132 | MPL3115A2_usr2_fptr(); |
clemente | 2:a2fcfb7ff611 | 133 | } |
clemente | 2:a2fcfb7ff611 | 134 | |
clemente | 3:a2f1752add9a | 135 | void MPL3115A2::AltitudeTrigger( void(*fptr)(void), unsigned short level) |
clemente | 3:a2f1752add9a | 136 | { |
clemente | 3:a2f1752add9a | 137 | unsigned char dt[5]; |
clemente | 3:a2f1752add9a | 138 | unsigned char data[2]; |
clemente | 3:a2f1752add9a | 139 | |
clemente | 3:a2f1752add9a | 140 | // Soft Reset |
clemente | 3:a2f1752add9a | 141 | Reset(); |
clemente | 3:a2f1752add9a | 142 | |
clemente | 3:a2f1752add9a | 143 | // The device is on standby |
clemente | 3:a2f1752add9a | 144 | Standby(); |
clemente | 3:a2f1752add9a | 145 | |
clemente | 3:a2f1752add9a | 146 | // Clear all interrupts by reading the output registers. |
clemente | 3:a2f1752add9a | 147 | readRegs( REG_ALTIMETER_MSB, &dt[0], 5); |
clemente | 3:a2f1752add9a | 148 | getStatus(); |
clemente | 3:a2f1752add9a | 149 | |
clemente | 3:a2f1752add9a | 150 | // Write Target and Window Values |
clemente | 4:fdf14a259af8 | 151 | dt[0] = REG_P_TGT_MSB; |
clemente | 4:fdf14a259af8 | 152 | dt[1] = (level>>8); |
clemente | 4:fdf14a259af8 | 153 | dt[2] = (level&0xFF); |
clemente | 4:fdf14a259af8 | 154 | writeRegs( dt, 3); |
clemente | 3:a2f1752add9a | 155 | |
clemente | 3:a2f1752add9a | 156 | // Window values are zero |
clemente | 4:fdf14a259af8 | 157 | dt[0] = REG_P_WND_MSB; |
clemente | 4:fdf14a259af8 | 158 | dt[1] = 0; |
clemente | 4:fdf14a259af8 | 159 | dt[2] = 0; |
clemente | 4:fdf14a259af8 | 160 | writeRegs( dt, 3); |
clemente | 3:a2f1752add9a | 161 | |
clemente | 3:a2f1752add9a | 162 | // Enable Pressure Threshold interrupt |
clemente | 3:a2f1752add9a | 163 | data[0] = REG_CTRL_REG_4; |
clemente | 3:a2f1752add9a | 164 | data[1] = 0x08; |
clemente | 3:a2f1752add9a | 165 | writeRegs( data, 2); |
clemente | 3:a2f1752add9a | 166 | // Interrupt is routed to INT1 |
clemente | 3:a2f1752add9a | 167 | data[0] = REG_CTRL_REG_5; |
clemente | 3:a2f1752add9a | 168 | data[1] = 0x08; |
clemente | 3:a2f1752add9a | 169 | writeRegs( data, 2); |
clemente | 4:fdf14a259af8 | 170 | data[0] = REG_PT_DATA_CFG; |
clemente | 4:fdf14a259af8 | 171 | data[1] = 0x07; |
clemente | 4:fdf14a259af8 | 172 | writeRegs(data, 2); |
clemente | 4:fdf14a259af8 | 173 | // Configure the OverSampling rate, Altimeter mode and set the sensor Active |
clemente | 4:fdf14a259af8 | 174 | data[0] = REG_CTRL_REG_1; |
clemente | 4:fdf14a259af8 | 175 | data[1] = 0x81 | (MPL3115A2_oversampling<<3); |
clemente | 4:fdf14a259af8 | 176 | writeRegs(data, 2); |
clemente | 3:a2f1752add9a | 177 | |
clemente | 7:59e9ba115d0a | 178 | MPL3115A2_usr1_fptr = fptr; |
clemente | 3:a2f1752add9a | 179 | MPL3115A2_Int1.fall( this, &MPL3115A2::AltitudeTrg_IRQ); |
clemente | 3:a2f1752add9a | 180 | |
clemente | 3:a2f1752add9a | 181 | } |
clemente | 3:a2f1752add9a | 182 | |
clemente | 3:a2f1752add9a | 183 | void MPL3115A2::AltitudeTrg_IRQ( void) |
clemente | 3:a2f1752add9a | 184 | { |
clemente | 3:a2f1752add9a | 185 | // Clear the IRQ flag |
clemente | 3:a2f1752add9a | 186 | getStatus(); |
clemente | 3:a2f1752add9a | 187 | // Run the user supplied function |
clemente | 7:59e9ba115d0a | 188 | MPL3115A2_usr1_fptr(); |
clemente | 3:a2f1752add9a | 189 | |
clemente | 3:a2f1752add9a | 190 | } |
clemente | 3:a2f1752add9a | 191 | |
clemente | 0:cfecfabc5e23 | 192 | void MPL3115A2::Barometric_Mode( void) |
clemente | 0:cfecfabc5e23 | 193 | { |
clemente | 0:cfecfabc5e23 | 194 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 195 | unsigned char data[2]; |
clemente | 0:cfecfabc5e23 | 196 | |
clemente | 0:cfecfabc5e23 | 197 | Standby(); |
clemente | 0:cfecfabc5e23 | 198 | |
clemente | 0:cfecfabc5e23 | 199 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 200 | Reset(); |
clemente | 2:a2fcfb7ff611 | 201 | |
clemente | 0:cfecfabc5e23 | 202 | Standby(); |
clemente | 0:cfecfabc5e23 | 203 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 204 | |
clemente | 2:a2fcfb7ff611 | 205 | // Set the Barometric mode |
clemente | 0:cfecfabc5e23 | 206 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 207 | data[1] = t&0x7F; |
clemente | 0:cfecfabc5e23 | 208 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 209 | |
clemente | 0:cfecfabc5e23 | 210 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 211 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 212 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 213 | |
clemente | 0:cfecfabc5e23 | 214 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 215 | |
clemente | 0:cfecfabc5e23 | 216 | Active(); |
clemente | 0:cfecfabc5e23 | 217 | |
clemente | 0:cfecfabc5e23 | 218 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 219 | } |
clemente | 0:cfecfabc5e23 | 220 | |
clemente | 0:cfecfabc5e23 | 221 | void MPL3115A2::Altimeter_Mode( void) |
clemente | 0:cfecfabc5e23 | 222 | { |
clemente | 0:cfecfabc5e23 | 223 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 224 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 225 | |
clemente | 0:cfecfabc5e23 | 226 | Standby(); |
clemente | 0:cfecfabc5e23 | 227 | |
clemente | 0:cfecfabc5e23 | 228 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 229 | Reset(); |
clemente | 0:cfecfabc5e23 | 230 | |
clemente | 0:cfecfabc5e23 | 231 | Standby(); |
clemente | 0:cfecfabc5e23 | 232 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 233 | |
clemente | 0:cfecfabc5e23 | 234 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 235 | data[1] = t|0x80; |
clemente | 0:cfecfabc5e23 | 236 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 237 | |
clemente | 0:cfecfabc5e23 | 238 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 239 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 240 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 241 | |
clemente | 0:cfecfabc5e23 | 242 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 243 | |
clemente | 0:cfecfabc5e23 | 244 | Active(); |
clemente | 0:cfecfabc5e23 | 245 | |
clemente | 0:cfecfabc5e23 | 246 | MPL3115A2_mode = ALTIMETER_MODE; |
clemente | 0:cfecfabc5e23 | 247 | } |
clemente | 0:cfecfabc5e23 | 248 | |
clemente | 0:cfecfabc5e23 | 249 | void MPL3115A2::Oversample_Ratio( unsigned int ratio) |
clemente | 0:cfecfabc5e23 | 250 | { |
clemente | 0:cfecfabc5e23 | 251 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 252 | |
clemente | 0:cfecfabc5e23 | 253 | Standby(); |
clemente | 0:cfecfabc5e23 | 254 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 255 | |
clemente | 0:cfecfabc5e23 | 256 | t = t & 0xE7; |
clemente | 0:cfecfabc5e23 | 257 | t = t | ( ratio<<3); |
clemente | 0:cfecfabc5e23 | 258 | |
clemente | 0:cfecfabc5e23 | 259 | unsigned char data[2] = { REG_CTRL_REG_1, t}; |
clemente | 0:cfecfabc5e23 | 260 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 261 | |
clemente | 0:cfecfabc5e23 | 262 | Active(); |
clemente | 0:cfecfabc5e23 | 263 | |
clemente | 0:cfecfabc5e23 | 264 | MPL3115A2_oversampling = ratio; |
clemente | 0:cfecfabc5e23 | 265 | } |
clemente | 0:cfecfabc5e23 | 266 | |
clemente | 0:cfecfabc5e23 | 267 | |
clemente | 0:cfecfabc5e23 | 268 | void MPL3115A2::Active( void) |
clemente | 0:cfecfabc5e23 | 269 | { |
clemente | 0:cfecfabc5e23 | 270 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 271 | |
clemente | 0:cfecfabc5e23 | 272 | // Activate the peripheral |
clemente | 0:cfecfabc5e23 | 273 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 274 | unsigned char data[2] = {REG_CTRL_REG_1, t|0x01}; |
clemente | 0:cfecfabc5e23 | 275 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 276 | } |
clemente | 0:cfecfabc5e23 | 277 | |
clemente | 0:cfecfabc5e23 | 278 | void MPL3115A2::Standby( void) |
clemente | 0:cfecfabc5e23 | 279 | { |
clemente | 0:cfecfabc5e23 | 280 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 281 | |
clemente | 0:cfecfabc5e23 | 282 | // Standby |
clemente | 0:cfecfabc5e23 | 283 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 284 | unsigned char data[2] = {REG_CTRL_REG_1, t&0xFE}; |
clemente | 0:cfecfabc5e23 | 285 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 286 | } |
clemente | 0:cfecfabc5e23 | 287 | |
clemente | 0:cfecfabc5e23 | 288 | unsigned char MPL3115A2::getDeviceID() { |
clemente | 0:cfecfabc5e23 | 289 | unsigned char device_id = 0; |
clemente | 0:cfecfabc5e23 | 290 | readRegs(REG_WHO_AM_I, &device_id, 1); |
clemente | 0:cfecfabc5e23 | 291 | return device_id; |
clemente | 0:cfecfabc5e23 | 292 | } |
clemente | 0:cfecfabc5e23 | 293 | |
clemente | 0:cfecfabc5e23 | 294 | unsigned int MPL3115A2::isDataAvailable( void) |
clemente | 0:cfecfabc5e23 | 295 | { |
clemente | 0:cfecfabc5e23 | 296 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 297 | |
clemente | 0:cfecfabc5e23 | 298 | readRegs( REG_STATUS, &status, 1); |
clemente | 6:03c24251e500 | 299 | |
clemente | 6:03c24251e500 | 300 | return ((status>>1)); |
clemente | 0:cfecfabc5e23 | 301 | |
clemente | 0:cfecfabc5e23 | 302 | } |
clemente | 0:cfecfabc5e23 | 303 | |
clemente | 0:cfecfabc5e23 | 304 | unsigned char MPL3115A2::getStatus( void) |
clemente | 0:cfecfabc5e23 | 305 | { |
clemente | 0:cfecfabc5e23 | 306 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 307 | |
clemente | 0:cfecfabc5e23 | 308 | readRegs( REG_STATUS, &status, 1); |
clemente | 0:cfecfabc5e23 | 309 | return status; |
clemente | 0:cfecfabc5e23 | 310 | } |
clemente | 0:cfecfabc5e23 | 311 | |
clemente | 6:03c24251e500 | 312 | unsigned int MPL3115A2::getAllData( float *f) |
clemente | 0:cfecfabc5e23 | 313 | { |
clemente | 6:03c24251e500 | 314 | if ( isDataAvailable() & PTDR_STATUS) { |
clemente | 6:03c24251e500 | 315 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 316 | f[0] = getAltimeter( REG_ALTIMETER_MSB); |
clemente | 6:03c24251e500 | 317 | } else { |
clemente | 9:75a5960adf5c | 318 | f[0] = getPressure( REG_PRESSURE_MSB); |
clemente | 6:03c24251e500 | 319 | } |
clemente | 6:03c24251e500 | 320 | |
clemente | 9:75a5960adf5c | 321 | f[1] = getTemperature( REG_TEMP_MSB); |
clemente | 6:03c24251e500 | 322 | // |
clemente | 6:03c24251e500 | 323 | return 1; |
clemente | 6:03c24251e500 | 324 | } else |
clemente | 6:03c24251e500 | 325 | return 0; |
clemente | 0:cfecfabc5e23 | 326 | } |
clemente | 0:cfecfabc5e23 | 327 | |
clemente | 9:75a5960adf5c | 328 | void MPL3115A2::getAllMaximumData( float *f) |
clemente | 9:75a5960adf5c | 329 | { |
clemente | 9:75a5960adf5c | 330 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 331 | f[0] = getAltimeter( REG_ALTI_MAX_MSB); |
clemente | 9:75a5960adf5c | 332 | } else { |
clemente | 9:75a5960adf5c | 333 | f[0] = getPressure( REG_PRES_MAX_MSB); |
clemente | 9:75a5960adf5c | 334 | } |
clemente | 9:75a5960adf5c | 335 | |
clemente | 9:75a5960adf5c | 336 | f[1] = getTemperature( REG_TEMP_MAX_MSB); |
clemente | 9:75a5960adf5c | 337 | } |
clemente | 9:75a5960adf5c | 338 | |
clemente | 9:75a5960adf5c | 339 | void MPL3115A2::getAllMinimumData( float *f) |
clemente | 9:75a5960adf5c | 340 | { |
clemente | 9:75a5960adf5c | 341 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 342 | f[0] = getAltimeter( REG_ALTI_MIN_MSB); |
clemente | 9:75a5960adf5c | 343 | } else { |
clemente | 9:75a5960adf5c | 344 | f[0] = getPressure( REG_PRES_MIN_MSB); |
clemente | 9:75a5960adf5c | 345 | } |
clemente | 9:75a5960adf5c | 346 | |
clemente | 9:75a5960adf5c | 347 | f[1] = getTemperature( REG_TEMP_MIN_MSB); |
clemente | 9:75a5960adf5c | 348 | } |
clemente | 9:75a5960adf5c | 349 | |
clemente | 0:cfecfabc5e23 | 350 | float MPL3115A2::getAltimeter( void) |
clemente | 0:cfecfabc5e23 | 351 | { |
clemente | 9:75a5960adf5c | 352 | float a; |
clemente | 9:75a5960adf5c | 353 | |
clemente | 9:75a5960adf5c | 354 | a = getAltimeter( REG_ALTIMETER_MSB); |
clemente | 9:75a5960adf5c | 355 | return a; |
clemente | 9:75a5960adf5c | 356 | } |
clemente | 9:75a5960adf5c | 357 | |
clemente | 9:75a5960adf5c | 358 | float MPL3115A2::getAltimeter( unsigned char reg) |
clemente | 9:75a5960adf5c | 359 | { |
clemente | 0:cfecfabc5e23 | 360 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 361 | unsigned short altm; |
clemente | 0:cfecfabc5e23 | 362 | float faltm; |
clemente | 0:cfecfabc5e23 | 363 | |
clemente | 0:cfecfabc5e23 | 364 | /* |
clemente | 5:9edec5ee8bf4 | 365 | * dt[0] = Bits 12-19 of 20-bit real-time Altitude sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 366 | * dt[1] = Bits 4-11 of 20-bit real-time Altitude sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 367 | * dt[2] = Bits 0-3 of 20-bit real-time Altitude sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 368 | */ |
clemente | 9:75a5960adf5c | 369 | readRegs( reg, &dt[0], 3); |
clemente | 0:cfecfabc5e23 | 370 | altm = (dt[0]<<8) | dt[1]; |
clemente | 0:cfecfabc5e23 | 371 | // |
clemente | 0:cfecfabc5e23 | 372 | if ( dt[0] > 0x7F) { |
clemente | 0:cfecfabc5e23 | 373 | altm = ~altm + 1; |
clemente | 0:cfecfabc5e23 | 374 | faltm = (float)altm * -1.0f; |
clemente | 0:cfecfabc5e23 | 375 | } else { |
clemente | 0:cfecfabc5e23 | 376 | faltm = (float)altm * 1.0f; |
clemente | 0:cfecfabc5e23 | 377 | } |
clemente | 0:cfecfabc5e23 | 378 | // |
clemente | 0:cfecfabc5e23 | 379 | faltm = faltm+((float)(dt[2]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 380 | return faltm; |
clemente | 0:cfecfabc5e23 | 381 | } |
clemente | 0:cfecfabc5e23 | 382 | |
clemente | 0:cfecfabc5e23 | 383 | float MPL3115A2::getPressure( void) |
clemente | 0:cfecfabc5e23 | 384 | { |
clemente | 9:75a5960adf5c | 385 | float a; |
clemente | 9:75a5960adf5c | 386 | |
clemente | 9:75a5960adf5c | 387 | a = getPressure( REG_PRESSURE_MSB); |
clemente | 9:75a5960adf5c | 388 | return a; |
clemente | 9:75a5960adf5c | 389 | } |
clemente | 9:75a5960adf5c | 390 | |
clemente | 9:75a5960adf5c | 391 | float MPL3115A2::getPressure( unsigned char reg) |
clemente | 9:75a5960adf5c | 392 | { |
clemente | 0:cfecfabc5e23 | 393 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 394 | unsigned int prs; |
clemente | 0:cfecfabc5e23 | 395 | float fprs; |
clemente | 0:cfecfabc5e23 | 396 | |
clemente | 0:cfecfabc5e23 | 397 | /* |
clemente | 0:cfecfabc5e23 | 398 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 399 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 400 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 401 | */ |
clemente | 9:75a5960adf5c | 402 | readRegs( reg, &dt[0], 3); |
clemente | 0:cfecfabc5e23 | 403 | prs = (dt[0]<<10) | (dt[1]<<2) | (dt[2]>>6); |
clemente | 0:cfecfabc5e23 | 404 | // |
clemente | 0:cfecfabc5e23 | 405 | fprs = (float)prs * 1.0f; |
clemente | 0:cfecfabc5e23 | 406 | |
clemente | 0:cfecfabc5e23 | 407 | if ( dt[2] & 0x20) |
clemente | 0:cfecfabc5e23 | 408 | fprs += 0.25f; |
clemente | 0:cfecfabc5e23 | 409 | if ( dt[2] & 0x10) |
clemente | 0:cfecfabc5e23 | 410 | fprs += 0.5f; |
clemente | 0:cfecfabc5e23 | 411 | |
clemente | 0:cfecfabc5e23 | 412 | return fprs; |
clemente | 0:cfecfabc5e23 | 413 | } |
clemente | 0:cfecfabc5e23 | 414 | |
clemente | 9:75a5960adf5c | 415 | float MPL3115A2::getTemperature( void) |
clemente | 9:75a5960adf5c | 416 | { |
clemente | 9:75a5960adf5c | 417 | float a; |
clemente | 9:75a5960adf5c | 418 | |
clemente | 9:75a5960adf5c | 419 | a = getTemperature( REG_TEMP_MSB); |
clemente | 9:75a5960adf5c | 420 | return a; |
clemente | 9:75a5960adf5c | 421 | } |
clemente | 0:cfecfabc5e23 | 422 | |
clemente | 9:75a5960adf5c | 423 | float MPL3115A2::getTemperature( unsigned char reg) |
clemente | 0:cfecfabc5e23 | 424 | { |
clemente | 0:cfecfabc5e23 | 425 | unsigned char dt[2]; |
clemente | 0:cfecfabc5e23 | 426 | unsigned short temp; |
clemente | 0:cfecfabc5e23 | 427 | float ftemp; |
clemente | 0:cfecfabc5e23 | 428 | |
clemente | 0:cfecfabc5e23 | 429 | /* |
clemente | 0:cfecfabc5e23 | 430 | * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 431 | * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4) |
clemente | 0:cfecfabc5e23 | 432 | */ |
clemente | 9:75a5960adf5c | 433 | readRegs( reg, &dt[0], 2); |
clemente | 0:cfecfabc5e23 | 434 | temp = dt[0]; |
clemente | 0:cfecfabc5e23 | 435 | // |
clemente | 0:cfecfabc5e23 | 436 | if ( dt[0] > 0x7F) { |
clemente | 0:cfecfabc5e23 | 437 | temp = ~temp + 1; |
clemente | 0:cfecfabc5e23 | 438 | ftemp = (float)temp * -1.0f; |
clemente | 0:cfecfabc5e23 | 439 | } else { |
clemente | 0:cfecfabc5e23 | 440 | ftemp = (float)temp * 1.0f; |
clemente | 0:cfecfabc5e23 | 441 | } |
clemente | 0:cfecfabc5e23 | 442 | // |
clemente | 0:cfecfabc5e23 | 443 | ftemp = ftemp+((float)(dt[1]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 444 | return ftemp; |
clemente | 0:cfecfabc5e23 | 445 | |
clemente | 0:cfecfabc5e23 | 446 | } |
clemente | 0:cfecfabc5e23 | 447 | |
clemente | 9:75a5960adf5c | 448 | |
clemente | 5:9edec5ee8bf4 | 449 | unsigned int MPL3115A2::getAllDataRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 450 | { |
clemente | 6:03c24251e500 | 451 | // Check for Press/Alti and Temp value ready |
clemente | 6:03c24251e500 | 452 | if ( isDataAvailable() & PTDR_STATUS) { |
clemente | 6:03c24251e500 | 453 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 6:03c24251e500 | 454 | getAltimeterRaw( &dt[0]); // 3 bytes |
clemente | 6:03c24251e500 | 455 | } else { |
clemente | 6:03c24251e500 | 456 | getPressureRaw( &dt[0]); // 3 bytes |
clemente | 6:03c24251e500 | 457 | } |
clemente | 6:03c24251e500 | 458 | |
clemente | 6:03c24251e500 | 459 | getTemperatureRaw( &dt[3]); // 2 bytes |
clemente | 6:03c24251e500 | 460 | |
clemente | 6:03c24251e500 | 461 | return 1; |
clemente | 5:9edec5ee8bf4 | 462 | } else { |
clemente | 6:03c24251e500 | 463 | return 0; |
clemente | 5:9edec5ee8bf4 | 464 | } |
clemente | 5:9edec5ee8bf4 | 465 | } |
clemente | 5:9edec5ee8bf4 | 466 | |
clemente | 5:9edec5ee8bf4 | 467 | unsigned int MPL3115A2::getAltimeterRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 468 | { |
clemente | 5:9edec5ee8bf4 | 469 | |
clemente | 5:9edec5ee8bf4 | 470 | /* |
clemente | 5:9edec5ee8bf4 | 471 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 472 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 473 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 5:9edec5ee8bf4 | 474 | */ |
clemente | 6:03c24251e500 | 475 | |
clemente | 6:03c24251e500 | 476 | // Check for Press/Alti value ready |
clemente | 6:03c24251e500 | 477 | if ( isDataAvailable() & PDR_STATUS) { |
clemente | 6:03c24251e500 | 478 | readRegs( REG_ALTIMETER_MSB, &dt[0], 3); |
clemente | 6:03c24251e500 | 479 | return 1; |
clemente | 6:03c24251e500 | 480 | } else |
clemente | 6:03c24251e500 | 481 | return 0; |
clemente | 5:9edec5ee8bf4 | 482 | } |
clemente | 5:9edec5ee8bf4 | 483 | |
clemente | 5:9edec5ee8bf4 | 484 | unsigned int MPL3115A2::getPressureRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 485 | { |
clemente | 5:9edec5ee8bf4 | 486 | |
clemente | 5:9edec5ee8bf4 | 487 | /* |
clemente | 5:9edec5ee8bf4 | 488 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 489 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 490 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 5:9edec5ee8bf4 | 491 | */ |
clemente | 6:03c24251e500 | 492 | |
clemente | 6:03c24251e500 | 493 | // Check for Press/Alti value ready |
clemente | 6:03c24251e500 | 494 | if ( isDataAvailable() & PDR_STATUS) { |
clemente | 6:03c24251e500 | 495 | readRegs( REG_PRESSURE_MSB, &dt[0], 3); |
clemente | 6:03c24251e500 | 496 | return 1; |
clemente | 6:03c24251e500 | 497 | } else |
clemente | 6:03c24251e500 | 498 | return 0; |
clemente | 6:03c24251e500 | 499 | |
clemente | 5:9edec5ee8bf4 | 500 | } |
clemente | 5:9edec5ee8bf4 | 501 | |
clemente | 5:9edec5ee8bf4 | 502 | unsigned int MPL3115A2::getTemperatureRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 503 | { |
clemente | 5:9edec5ee8bf4 | 504 | |
clemente | 5:9edec5ee8bf4 | 505 | /* |
clemente | 5:9edec5ee8bf4 | 506 | * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 507 | * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4) |
clemente | 5:9edec5ee8bf4 | 508 | */ |
clemente | 6:03c24251e500 | 509 | |
clemente | 6:03c24251e500 | 510 | // Check for Temp value ready |
clemente | 6:03c24251e500 | 511 | if ( isDataAvailable() & TDR_STATUS) { |
clemente | 6:03c24251e500 | 512 | readRegs( REG_TEMP_MSB, &dt[0], 2); |
clemente | 6:03c24251e500 | 513 | return 1; |
clemente | 6:03c24251e500 | 514 | } else |
clemente | 6:03c24251e500 | 515 | return 0; |
clemente | 5:9edec5ee8bf4 | 516 | } |
clemente | 5:9edec5ee8bf4 | 517 | |
clemente | 8:89ed6aeb5dbb | 518 | void MPL3115A2::SetPressureOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 519 | { |
clemente | 9:75a5960adf5c | 520 | unsigned char data [2] = {REG_OFF_P, offset}; |
clemente | 8:89ed6aeb5dbb | 521 | |
clemente | 8:89ed6aeb5dbb | 522 | Standby(); |
clemente | 8:89ed6aeb5dbb | 523 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 524 | |
clemente | 8:89ed6aeb5dbb | 525 | Active(); |
clemente | 8:89ed6aeb5dbb | 526 | } |
clemente | 8:89ed6aeb5dbb | 527 | |
clemente | 8:89ed6aeb5dbb | 528 | void MPL3115A2::SetTemperatureOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 529 | { |
clemente | 9:75a5960adf5c | 530 | unsigned char data [2] = {REG_OFF_T, offset}; |
clemente | 8:89ed6aeb5dbb | 531 | |
clemente | 8:89ed6aeb5dbb | 532 | Standby(); |
clemente | 8:89ed6aeb5dbb | 533 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 534 | |
clemente | 8:89ed6aeb5dbb | 535 | Active(); |
clemente | 8:89ed6aeb5dbb | 536 | } |
clemente | 8:89ed6aeb5dbb | 537 | |
clemente | 8:89ed6aeb5dbb | 538 | void MPL3115A2::SetAltitudeOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 539 | { |
clemente | 9:75a5960adf5c | 540 | unsigned char data [2] = {REG_OFF_H, offset}; |
clemente | 8:89ed6aeb5dbb | 541 | |
clemente | 8:89ed6aeb5dbb | 542 | Standby(); |
clemente | 8:89ed6aeb5dbb | 543 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 544 | |
clemente | 8:89ed6aeb5dbb | 545 | Active(); |
clemente | 8:89ed6aeb5dbb | 546 | } |
clemente | 8:89ed6aeb5dbb | 547 | |
clemente | 0:cfecfabc5e23 | 548 | void MPL3115A2::readRegs(int addr, uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 549 | char t[1] = {addr}; |
clemente | 0:cfecfabc5e23 | 550 | m_i2c.write(m_addr, t, 1, true); |
clemente | 0:cfecfabc5e23 | 551 | m_i2c.read(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 552 | } |
clemente | 0:cfecfabc5e23 | 553 | |
clemente | 0:cfecfabc5e23 | 554 | void MPL3115A2::writeRegs(uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 555 | m_i2c.write(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 556 | } |