pressure
Fork of MPL3115A2 by
MPL3115A2.cpp@10:82ac06669316, 2013-09-24 (annotated)
- Committer:
- clemente
- Date:
- Tue Sep 24 20:22:25 2013 +0000
- Revision:
- 10:82ac06669316
- Parent:
- 9:75a5960adf5c
- Child:
- 11:39bfad7780a1
Added a function to return delta values. Corrected but in case of negative numbers.
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 | 10:82ac06669316 | 24 | #define REG_PRES_DELTA_MSB 0x07 |
clemente | 10:82ac06669316 | 25 | #define REG_ALTI_DELTA_MSB 0x07 |
clemente | 10:82ac06669316 | 26 | #define REG_TEMP_DELTA_MSB 0x0a |
clemente | 10:82ac06669316 | 27 | |
clemente | 0:cfecfabc5e23 | 28 | |
clemente | 0:cfecfabc5e23 | 29 | #define UINT14_MAX 16383 |
clemente | 0:cfecfabc5e23 | 30 | |
clemente | 6:03c24251e500 | 31 | // Status flag for data ready. |
clemente | 6:03c24251e500 | 32 | #define PTDR_STATUS 0x03 // Pressure Altitude and Temperature ready |
clemente | 6:03c24251e500 | 33 | #define PDR_STATUS 0x02 // Pressure and Altitude data ready |
clemente | 6:03c24251e500 | 34 | #define TDR_STATUS 0x01 // Temperature data ready |
clemente | 6:03c24251e500 | 35 | |
clemente | 3:a2f1752add9a | 36 | /** Interrupt schema |
clemente | 3:a2f1752add9a | 37 | * |
clemente | 3:a2f1752add9a | 38 | * :: The Altitude Trigger use the IRQ1. |
clemente | 3:a2f1752add9a | 39 | * |
clemente | 7:59e9ba115d0a | 40 | * Altitude Trigger -- MPL3115A2_Int1.fall --- AltitudeTrg_IRQ --- MPL3115A2_usr1_fptr |
clemente | 3:a2f1752add9a | 41 | * |
clemente | 3:a2f1752add9a | 42 | * |
clemente | 3:a2f1752add9a | 43 | * :: The Data ready use the IRQ2. |
clemente | 3:a2f1752add9a | 44 | * |
clemente | 7:59e9ba115d0a | 45 | * Data Ready -- MPL3115A2_Int2.fall --- DataReady_IRQ --- MPL3115A2_usr2_fptr |
clemente | 3:a2f1752add9a | 46 | * |
clemente | 3:a2f1752add9a | 47 | */ |
clemente | 7:59e9ba115d0a | 48 | void (*MPL3115A2_usr2_fptr)(void); // Pointers to user function called after |
clemente | 7:59e9ba115d0a | 49 | void (*MPL3115A2_usr1_fptr)(void); // IRQ assertion. |
clemente | 2:a2fcfb7ff611 | 50 | |
clemente | 2:a2fcfb7ff611 | 51 | // |
clemente | 2:a2fcfb7ff611 | 52 | InterruptIn MPL3115A2_Int1( PTD4); // INT1 |
clemente | 2:a2fcfb7ff611 | 53 | InterruptIn MPL3115A2_Int2( PTA12); // INT2 |
clemente | 2:a2fcfb7ff611 | 54 | |
clemente | 0:cfecfabc5e23 | 55 | MPL3115A2::MPL3115A2(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { |
clemente | 9:75a5960adf5c | 56 | unsigned char data[6]; |
clemente | 9:75a5960adf5c | 57 | |
clemente | 0:cfecfabc5e23 | 58 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 59 | MPL3115A2_oversampling = OVERSAMPLE_RATIO_1; |
clemente | 4:fdf14a259af8 | 60 | // |
clemente | 7:59e9ba115d0a | 61 | MPL3115A2_usr1_fptr = NULL; |
clemente | 7:59e9ba115d0a | 62 | MPL3115A2_usr2_fptr = NULL; |
clemente | 4:fdf14a259af8 | 63 | MPL3115A2_Int1.fall( NULL); |
clemente | 4:fdf14a259af8 | 64 | MPL3115A2_Int2.fall( NULL); |
clemente | 8:89ed6aeb5dbb | 65 | |
clemente | 8:89ed6aeb5dbb | 66 | Reset(); |
clemente | 9:75a5960adf5c | 67 | |
clemente | 9:75a5960adf5c | 68 | data[0]=REG_PRES_MIN_MSB; |
clemente | 9:75a5960adf5c | 69 | data[1]=0;data[2]=0;data[3]=0;data[4]=0;data[5]=0; |
clemente | 9:75a5960adf5c | 70 | writeRegs( &data[0], 6); |
clemente | 0:cfecfabc5e23 | 71 | } |
clemente | 0:cfecfabc5e23 | 72 | |
clemente | 2:a2fcfb7ff611 | 73 | void MPL3115A2::Reset( void) |
clemente | 2:a2fcfb7ff611 | 74 | { |
clemente | 2:a2fcfb7ff611 | 75 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 76 | |
clemente | 2:a2fcfb7ff611 | 77 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 78 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 2:a2fcfb7ff611 | 79 | unsigned char data[2] = { REG_CTRL_REG_1, t|0x04}; |
clemente | 2:a2fcfb7ff611 | 80 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 81 | wait( 0.1); |
clemente | 2:a2fcfb7ff611 | 82 | |
clemente | 2:a2fcfb7ff611 | 83 | } |
clemente | 2:a2fcfb7ff611 | 84 | |
clemente | 2:a2fcfb7ff611 | 85 | void MPL3115A2::DataReady( void(*fptr)(void), unsigned char OS) |
clemente | 2:a2fcfb7ff611 | 86 | { |
clemente | 2:a2fcfb7ff611 | 87 | unsigned char dt[5]; |
clemente | 2:a2fcfb7ff611 | 88 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 89 | |
clemente | 4:fdf14a259af8 | 90 | // Soft Reset |
clemente | 2:a2fcfb7ff611 | 91 | Reset(); |
clemente | 2:a2fcfb7ff611 | 92 | |
clemente | 2:a2fcfb7ff611 | 93 | Standby(); |
clemente | 2:a2fcfb7ff611 | 94 | |
clemente | 4:fdf14a259af8 | 95 | // Clear all interrupts by reading the output registers. |
clemente | 2:a2fcfb7ff611 | 96 | readRegs( REG_ALTIMETER_MSB, &dt[0], 5); |
clemente | 2:a2fcfb7ff611 | 97 | getStatus(); |
clemente | 4:fdf14a259af8 | 98 | // Configure INT active low and pullup |
clemente | 4:fdf14a259af8 | 99 | data[0] = REG_CTRL_REG_3; |
clemente | 4:fdf14a259af8 | 100 | data[1] = 0x00; |
clemente | 4:fdf14a259af8 | 101 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 102 | // Enable Interrupt fot data ready |
clemente | 2:a2fcfb7ff611 | 103 | data[0] = REG_CTRL_REG_4; |
clemente | 2:a2fcfb7ff611 | 104 | data[1] = 0x80; |
clemente | 2:a2fcfb7ff611 | 105 | writeRegs(data, 2); |
clemente | 3:a2f1752add9a | 106 | // Configure Interrupt to route to INT2 |
clemente | 2:a2fcfb7ff611 | 107 | data[0] = REG_CTRL_REG_5; |
clemente | 2:a2fcfb7ff611 | 108 | data[1] = 0x00; |
clemente | 2:a2fcfb7ff611 | 109 | writeRegs(data, 2); |
clemente | 4:fdf14a259af8 | 110 | data[0] = REG_PT_DATA_CFG; |
clemente | 4:fdf14a259af8 | 111 | data[1] = 0x07; |
clemente | 4:fdf14a259af8 | 112 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 113 | |
clemente | 4:fdf14a259af8 | 114 | // Configure the OverSampling rate, Altimeter/Barometer mode and set the sensor Active |
clemente | 2:a2fcfb7ff611 | 115 | data[0] = REG_CTRL_REG_1; |
clemente | 4:fdf14a259af8 | 116 | data[1] = (OS<<3); |
clemente | 4:fdf14a259af8 | 117 | // |
clemente | 4:fdf14a259af8 | 118 | if (MPL3115A2_mode == BAROMETRIC_MODE) |
clemente | 4:fdf14a259af8 | 119 | data[1] &= 0x7F; |
clemente | 4:fdf14a259af8 | 120 | else |
clemente | 4:fdf14a259af8 | 121 | data[1] |= 0x80; |
clemente | 4:fdf14a259af8 | 122 | // |
clemente | 4:fdf14a259af8 | 123 | data[1] |= 0x01; |
clemente | 2:a2fcfb7ff611 | 124 | writeRegs(data, 2); |
clemente | 2:a2fcfb7ff611 | 125 | |
clemente | 7:59e9ba115d0a | 126 | MPL3115A2_usr2_fptr = fptr; |
clemente | 2:a2fcfb7ff611 | 127 | MPL3115A2_Int2.fall( this, &MPL3115A2::DataReady_IRQ); |
clemente | 2:a2fcfb7ff611 | 128 | |
clemente | 2:a2fcfb7ff611 | 129 | } |
clemente | 2:a2fcfb7ff611 | 130 | |
clemente | 2:a2fcfb7ff611 | 131 | void MPL3115A2::DataReady_IRQ( void) |
clemente | 2:a2fcfb7ff611 | 132 | { |
clemente | 2:a2fcfb7ff611 | 133 | // Clear the IRQ flag |
clemente | 2:a2fcfb7ff611 | 134 | getStatus(); |
clemente | 2:a2fcfb7ff611 | 135 | // Run the user supplied function |
clemente | 7:59e9ba115d0a | 136 | MPL3115A2_usr2_fptr(); |
clemente | 2:a2fcfb7ff611 | 137 | } |
clemente | 2:a2fcfb7ff611 | 138 | |
clemente | 3:a2f1752add9a | 139 | void MPL3115A2::AltitudeTrigger( void(*fptr)(void), unsigned short level) |
clemente | 3:a2f1752add9a | 140 | { |
clemente | 3:a2f1752add9a | 141 | unsigned char dt[5]; |
clemente | 3:a2f1752add9a | 142 | unsigned char data[2]; |
clemente | 3:a2f1752add9a | 143 | |
clemente | 3:a2f1752add9a | 144 | // Soft Reset |
clemente | 3:a2f1752add9a | 145 | Reset(); |
clemente | 3:a2f1752add9a | 146 | |
clemente | 3:a2f1752add9a | 147 | // The device is on standby |
clemente | 3:a2f1752add9a | 148 | Standby(); |
clemente | 3:a2f1752add9a | 149 | |
clemente | 3:a2f1752add9a | 150 | // Clear all interrupts by reading the output registers. |
clemente | 3:a2f1752add9a | 151 | readRegs( REG_ALTIMETER_MSB, &dt[0], 5); |
clemente | 3:a2f1752add9a | 152 | getStatus(); |
clemente | 3:a2f1752add9a | 153 | |
clemente | 3:a2f1752add9a | 154 | // Write Target and Window Values |
clemente | 4:fdf14a259af8 | 155 | dt[0] = REG_P_TGT_MSB; |
clemente | 4:fdf14a259af8 | 156 | dt[1] = (level>>8); |
clemente | 4:fdf14a259af8 | 157 | dt[2] = (level&0xFF); |
clemente | 4:fdf14a259af8 | 158 | writeRegs( dt, 3); |
clemente | 3:a2f1752add9a | 159 | |
clemente | 3:a2f1752add9a | 160 | // Window values are zero |
clemente | 4:fdf14a259af8 | 161 | dt[0] = REG_P_WND_MSB; |
clemente | 4:fdf14a259af8 | 162 | dt[1] = 0; |
clemente | 4:fdf14a259af8 | 163 | dt[2] = 0; |
clemente | 4:fdf14a259af8 | 164 | writeRegs( dt, 3); |
clemente | 3:a2f1752add9a | 165 | |
clemente | 3:a2f1752add9a | 166 | // Enable Pressure Threshold interrupt |
clemente | 3:a2f1752add9a | 167 | data[0] = REG_CTRL_REG_4; |
clemente | 3:a2f1752add9a | 168 | data[1] = 0x08; |
clemente | 3:a2f1752add9a | 169 | writeRegs( data, 2); |
clemente | 3:a2f1752add9a | 170 | // Interrupt is routed to INT1 |
clemente | 3:a2f1752add9a | 171 | data[0] = REG_CTRL_REG_5; |
clemente | 3:a2f1752add9a | 172 | data[1] = 0x08; |
clemente | 3:a2f1752add9a | 173 | writeRegs( data, 2); |
clemente | 4:fdf14a259af8 | 174 | data[0] = REG_PT_DATA_CFG; |
clemente | 4:fdf14a259af8 | 175 | data[1] = 0x07; |
clemente | 4:fdf14a259af8 | 176 | writeRegs(data, 2); |
clemente | 4:fdf14a259af8 | 177 | // Configure the OverSampling rate, Altimeter mode and set the sensor Active |
clemente | 4:fdf14a259af8 | 178 | data[0] = REG_CTRL_REG_1; |
clemente | 4:fdf14a259af8 | 179 | data[1] = 0x81 | (MPL3115A2_oversampling<<3); |
clemente | 4:fdf14a259af8 | 180 | writeRegs(data, 2); |
clemente | 3:a2f1752add9a | 181 | |
clemente | 7:59e9ba115d0a | 182 | MPL3115A2_usr1_fptr = fptr; |
clemente | 3:a2f1752add9a | 183 | MPL3115A2_Int1.fall( this, &MPL3115A2::AltitudeTrg_IRQ); |
clemente | 3:a2f1752add9a | 184 | |
clemente | 3:a2f1752add9a | 185 | } |
clemente | 3:a2f1752add9a | 186 | |
clemente | 3:a2f1752add9a | 187 | void MPL3115A2::AltitudeTrg_IRQ( void) |
clemente | 3:a2f1752add9a | 188 | { |
clemente | 3:a2f1752add9a | 189 | // Clear the IRQ flag |
clemente | 3:a2f1752add9a | 190 | getStatus(); |
clemente | 3:a2f1752add9a | 191 | // Run the user supplied function |
clemente | 7:59e9ba115d0a | 192 | MPL3115A2_usr1_fptr(); |
clemente | 3:a2f1752add9a | 193 | |
clemente | 3:a2f1752add9a | 194 | } |
clemente | 3:a2f1752add9a | 195 | |
clemente | 0:cfecfabc5e23 | 196 | void MPL3115A2::Barometric_Mode( void) |
clemente | 0:cfecfabc5e23 | 197 | { |
clemente | 0:cfecfabc5e23 | 198 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 199 | unsigned char data[2]; |
clemente | 0:cfecfabc5e23 | 200 | |
clemente | 0:cfecfabc5e23 | 201 | Standby(); |
clemente | 0:cfecfabc5e23 | 202 | |
clemente | 0:cfecfabc5e23 | 203 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 204 | Reset(); |
clemente | 2:a2fcfb7ff611 | 205 | |
clemente | 0:cfecfabc5e23 | 206 | Standby(); |
clemente | 0:cfecfabc5e23 | 207 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 208 | |
clemente | 2:a2fcfb7ff611 | 209 | // Set the Barometric mode |
clemente | 0:cfecfabc5e23 | 210 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 211 | data[1] = t&0x7F; |
clemente | 0:cfecfabc5e23 | 212 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 213 | |
clemente | 0:cfecfabc5e23 | 214 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 215 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 216 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 217 | |
clemente | 0:cfecfabc5e23 | 218 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 219 | |
clemente | 0:cfecfabc5e23 | 220 | Active(); |
clemente | 0:cfecfabc5e23 | 221 | |
clemente | 0:cfecfabc5e23 | 222 | MPL3115A2_mode = BAROMETRIC_MODE; |
clemente | 0:cfecfabc5e23 | 223 | } |
clemente | 0:cfecfabc5e23 | 224 | |
clemente | 0:cfecfabc5e23 | 225 | void MPL3115A2::Altimeter_Mode( void) |
clemente | 0:cfecfabc5e23 | 226 | { |
clemente | 0:cfecfabc5e23 | 227 | unsigned char t; |
clemente | 2:a2fcfb7ff611 | 228 | unsigned char data[2]; |
clemente | 2:a2fcfb7ff611 | 229 | |
clemente | 0:cfecfabc5e23 | 230 | Standby(); |
clemente | 0:cfecfabc5e23 | 231 | |
clemente | 0:cfecfabc5e23 | 232 | // soft reset... |
clemente | 2:a2fcfb7ff611 | 233 | Reset(); |
clemente | 0:cfecfabc5e23 | 234 | |
clemente | 0:cfecfabc5e23 | 235 | Standby(); |
clemente | 0:cfecfabc5e23 | 236 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 237 | |
clemente | 0:cfecfabc5e23 | 238 | data[0] = REG_CTRL_REG_1; |
clemente | 0:cfecfabc5e23 | 239 | data[1] = t|0x80; |
clemente | 0:cfecfabc5e23 | 240 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 241 | |
clemente | 0:cfecfabc5e23 | 242 | data[0] = REG_PT_DATA_CFG; |
clemente | 0:cfecfabc5e23 | 243 | data[1] = 0x07; |
clemente | 0:cfecfabc5e23 | 244 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 245 | |
clemente | 0:cfecfabc5e23 | 246 | Oversample_Ratio( MPL3115A2_oversampling); |
clemente | 0:cfecfabc5e23 | 247 | |
clemente | 0:cfecfabc5e23 | 248 | Active(); |
clemente | 0:cfecfabc5e23 | 249 | |
clemente | 0:cfecfabc5e23 | 250 | MPL3115A2_mode = ALTIMETER_MODE; |
clemente | 0:cfecfabc5e23 | 251 | } |
clemente | 0:cfecfabc5e23 | 252 | |
clemente | 0:cfecfabc5e23 | 253 | void MPL3115A2::Oversample_Ratio( unsigned int ratio) |
clemente | 0:cfecfabc5e23 | 254 | { |
clemente | 0:cfecfabc5e23 | 255 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 256 | |
clemente | 0:cfecfabc5e23 | 257 | Standby(); |
clemente | 0:cfecfabc5e23 | 258 | readRegs( REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 259 | |
clemente | 0:cfecfabc5e23 | 260 | t = t & 0xE7; |
clemente | 0:cfecfabc5e23 | 261 | t = t | ( ratio<<3); |
clemente | 0:cfecfabc5e23 | 262 | |
clemente | 0:cfecfabc5e23 | 263 | unsigned char data[2] = { REG_CTRL_REG_1, t}; |
clemente | 0:cfecfabc5e23 | 264 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 265 | |
clemente | 0:cfecfabc5e23 | 266 | Active(); |
clemente | 0:cfecfabc5e23 | 267 | |
clemente | 0:cfecfabc5e23 | 268 | MPL3115A2_oversampling = ratio; |
clemente | 0:cfecfabc5e23 | 269 | } |
clemente | 0:cfecfabc5e23 | 270 | |
clemente | 0:cfecfabc5e23 | 271 | |
clemente | 0:cfecfabc5e23 | 272 | void MPL3115A2::Active( void) |
clemente | 0:cfecfabc5e23 | 273 | { |
clemente | 0:cfecfabc5e23 | 274 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 275 | |
clemente | 0:cfecfabc5e23 | 276 | // Activate the peripheral |
clemente | 0:cfecfabc5e23 | 277 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 278 | unsigned char data[2] = {REG_CTRL_REG_1, t|0x01}; |
clemente | 0:cfecfabc5e23 | 279 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 280 | } |
clemente | 0:cfecfabc5e23 | 281 | |
clemente | 0:cfecfabc5e23 | 282 | void MPL3115A2::Standby( void) |
clemente | 0:cfecfabc5e23 | 283 | { |
clemente | 0:cfecfabc5e23 | 284 | unsigned char t; |
clemente | 0:cfecfabc5e23 | 285 | |
clemente | 0:cfecfabc5e23 | 286 | // Standby |
clemente | 0:cfecfabc5e23 | 287 | readRegs(REG_CTRL_REG_1, &t, 1); |
clemente | 0:cfecfabc5e23 | 288 | unsigned char data[2] = {REG_CTRL_REG_1, t&0xFE}; |
clemente | 0:cfecfabc5e23 | 289 | writeRegs(data, 2); |
clemente | 0:cfecfabc5e23 | 290 | } |
clemente | 0:cfecfabc5e23 | 291 | |
clemente | 0:cfecfabc5e23 | 292 | unsigned char MPL3115A2::getDeviceID() { |
clemente | 0:cfecfabc5e23 | 293 | unsigned char device_id = 0; |
clemente | 0:cfecfabc5e23 | 294 | readRegs(REG_WHO_AM_I, &device_id, 1); |
clemente | 0:cfecfabc5e23 | 295 | return device_id; |
clemente | 0:cfecfabc5e23 | 296 | } |
clemente | 0:cfecfabc5e23 | 297 | |
clemente | 0:cfecfabc5e23 | 298 | unsigned int MPL3115A2::isDataAvailable( void) |
clemente | 0:cfecfabc5e23 | 299 | { |
clemente | 0:cfecfabc5e23 | 300 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 301 | |
clemente | 0:cfecfabc5e23 | 302 | readRegs( REG_STATUS, &status, 1); |
clemente | 6:03c24251e500 | 303 | |
clemente | 6:03c24251e500 | 304 | return ((status>>1)); |
clemente | 0:cfecfabc5e23 | 305 | |
clemente | 0:cfecfabc5e23 | 306 | } |
clemente | 0:cfecfabc5e23 | 307 | |
clemente | 0:cfecfabc5e23 | 308 | unsigned char MPL3115A2::getStatus( void) |
clemente | 0:cfecfabc5e23 | 309 | { |
clemente | 0:cfecfabc5e23 | 310 | unsigned char status; |
clemente | 0:cfecfabc5e23 | 311 | |
clemente | 0:cfecfabc5e23 | 312 | readRegs( REG_STATUS, &status, 1); |
clemente | 0:cfecfabc5e23 | 313 | return status; |
clemente | 0:cfecfabc5e23 | 314 | } |
clemente | 0:cfecfabc5e23 | 315 | |
clemente | 6:03c24251e500 | 316 | unsigned int MPL3115A2::getAllData( float *f) |
clemente | 0:cfecfabc5e23 | 317 | { |
clemente | 6:03c24251e500 | 318 | if ( isDataAvailable() & PTDR_STATUS) { |
clemente | 6:03c24251e500 | 319 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 320 | f[0] = getAltimeter( REG_ALTIMETER_MSB); |
clemente | 6:03c24251e500 | 321 | } else { |
clemente | 9:75a5960adf5c | 322 | f[0] = getPressure( REG_PRESSURE_MSB); |
clemente | 6:03c24251e500 | 323 | } |
clemente | 6:03c24251e500 | 324 | |
clemente | 9:75a5960adf5c | 325 | f[1] = getTemperature( REG_TEMP_MSB); |
clemente | 6:03c24251e500 | 326 | // |
clemente | 6:03c24251e500 | 327 | return 1; |
clemente | 6:03c24251e500 | 328 | } else |
clemente | 6:03c24251e500 | 329 | return 0; |
clemente | 0:cfecfabc5e23 | 330 | } |
clemente | 0:cfecfabc5e23 | 331 | |
clemente | 10:82ac06669316 | 332 | unsigned int MPL3115A2::getAllData( float *f, float *d) |
clemente | 10:82ac06669316 | 333 | { |
clemente | 10:82ac06669316 | 334 | if ( isDataAvailable() & PTDR_STATUS) { |
clemente | 10:82ac06669316 | 335 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 10:82ac06669316 | 336 | f[0] = getAltimeter(); |
clemente | 10:82ac06669316 | 337 | d[0] = getAltimeter( REG_ALTI_DELTA_MSB); |
clemente | 10:82ac06669316 | 338 | } else { |
clemente | 10:82ac06669316 | 339 | f[0] = getPressure(); |
clemente | 10:82ac06669316 | 340 | d[0] = getPressure( REG_PRES_DELTA_MSB); |
clemente | 10:82ac06669316 | 341 | } |
clemente | 10:82ac06669316 | 342 | |
clemente | 10:82ac06669316 | 343 | f[1] = getTemperature(); |
clemente | 10:82ac06669316 | 344 | d[1] = getTemperature( REG_TEMP_DELTA_MSB); |
clemente | 10:82ac06669316 | 345 | // |
clemente | 10:82ac06669316 | 346 | return 1; |
clemente | 10:82ac06669316 | 347 | } else |
clemente | 10:82ac06669316 | 348 | return 0; |
clemente | 10:82ac06669316 | 349 | } |
clemente | 10:82ac06669316 | 350 | |
clemente | 9:75a5960adf5c | 351 | void MPL3115A2::getAllMaximumData( float *f) |
clemente | 9:75a5960adf5c | 352 | { |
clemente | 9:75a5960adf5c | 353 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 354 | f[0] = getAltimeter( REG_ALTI_MAX_MSB); |
clemente | 9:75a5960adf5c | 355 | } else { |
clemente | 9:75a5960adf5c | 356 | f[0] = getPressure( REG_PRES_MAX_MSB); |
clemente | 9:75a5960adf5c | 357 | } |
clemente | 9:75a5960adf5c | 358 | |
clemente | 9:75a5960adf5c | 359 | f[1] = getTemperature( REG_TEMP_MAX_MSB); |
clemente | 9:75a5960adf5c | 360 | } |
clemente | 9:75a5960adf5c | 361 | |
clemente | 9:75a5960adf5c | 362 | void MPL3115A2::getAllMinimumData( float *f) |
clemente | 9:75a5960adf5c | 363 | { |
clemente | 9:75a5960adf5c | 364 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 9:75a5960adf5c | 365 | f[0] = getAltimeter( REG_ALTI_MIN_MSB); |
clemente | 9:75a5960adf5c | 366 | } else { |
clemente | 9:75a5960adf5c | 367 | f[0] = getPressure( REG_PRES_MIN_MSB); |
clemente | 9:75a5960adf5c | 368 | } |
clemente | 9:75a5960adf5c | 369 | |
clemente | 9:75a5960adf5c | 370 | f[1] = getTemperature( REG_TEMP_MIN_MSB); |
clemente | 9:75a5960adf5c | 371 | } |
clemente | 9:75a5960adf5c | 372 | |
clemente | 0:cfecfabc5e23 | 373 | float MPL3115A2::getAltimeter( void) |
clemente | 0:cfecfabc5e23 | 374 | { |
clemente | 9:75a5960adf5c | 375 | float a; |
clemente | 9:75a5960adf5c | 376 | |
clemente | 9:75a5960adf5c | 377 | a = getAltimeter( REG_ALTIMETER_MSB); |
clemente | 9:75a5960adf5c | 378 | return a; |
clemente | 9:75a5960adf5c | 379 | } |
clemente | 9:75a5960adf5c | 380 | |
clemente | 9:75a5960adf5c | 381 | float MPL3115A2::getAltimeter( unsigned char reg) |
clemente | 9:75a5960adf5c | 382 | { |
clemente | 0:cfecfabc5e23 | 383 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 384 | unsigned short altm; |
clemente | 10:82ac06669316 | 385 | short tmp; |
clemente | 0:cfecfabc5e23 | 386 | float faltm; |
clemente | 0:cfecfabc5e23 | 387 | |
clemente | 0:cfecfabc5e23 | 388 | /* |
clemente | 5:9edec5ee8bf4 | 389 | * dt[0] = Bits 12-19 of 20-bit real-time Altitude sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 390 | * dt[1] = Bits 4-11 of 20-bit real-time Altitude sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 391 | * dt[2] = Bits 0-3 of 20-bit real-time Altitude sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 392 | */ |
clemente | 9:75a5960adf5c | 393 | readRegs( reg, &dt[0], 3); |
clemente | 0:cfecfabc5e23 | 394 | altm = (dt[0]<<8) | dt[1]; |
clemente | 0:cfecfabc5e23 | 395 | // |
clemente | 0:cfecfabc5e23 | 396 | if ( dt[0] > 0x7F) { |
clemente | 10:82ac06669316 | 397 | // negative number |
clemente | 10:82ac06669316 | 398 | tmp = ~altm + 1; |
clemente | 10:82ac06669316 | 399 | faltm = (float)tmp * -1.0f; |
clemente | 0:cfecfabc5e23 | 400 | } else { |
clemente | 0:cfecfabc5e23 | 401 | faltm = (float)altm * 1.0f; |
clemente | 0:cfecfabc5e23 | 402 | } |
clemente | 0:cfecfabc5e23 | 403 | // |
clemente | 0:cfecfabc5e23 | 404 | faltm = faltm+((float)(dt[2]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 405 | return faltm; |
clemente | 0:cfecfabc5e23 | 406 | } |
clemente | 0:cfecfabc5e23 | 407 | |
clemente | 0:cfecfabc5e23 | 408 | float MPL3115A2::getPressure( void) |
clemente | 0:cfecfabc5e23 | 409 | { |
clemente | 9:75a5960adf5c | 410 | float a; |
clemente | 9:75a5960adf5c | 411 | |
clemente | 9:75a5960adf5c | 412 | a = getPressure( REG_PRESSURE_MSB); |
clemente | 9:75a5960adf5c | 413 | return a; |
clemente | 9:75a5960adf5c | 414 | } |
clemente | 9:75a5960adf5c | 415 | |
clemente | 9:75a5960adf5c | 416 | float MPL3115A2::getPressure( unsigned char reg) |
clemente | 9:75a5960adf5c | 417 | { |
clemente | 0:cfecfabc5e23 | 418 | unsigned char dt[3]; |
clemente | 0:cfecfabc5e23 | 419 | unsigned int prs; |
clemente | 10:82ac06669316 | 420 | int tmp; |
clemente | 0:cfecfabc5e23 | 421 | float fprs; |
clemente | 0:cfecfabc5e23 | 422 | |
clemente | 0:cfecfabc5e23 | 423 | /* |
clemente | 0:cfecfabc5e23 | 424 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 425 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 426 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 0:cfecfabc5e23 | 427 | */ |
clemente | 9:75a5960adf5c | 428 | readRegs( reg, &dt[0], 3); |
clemente | 10:82ac06669316 | 429 | prs = ((dt[0]<<10) | (dt[1]<<2) | (dt[2]>>6)); |
clemente | 0:cfecfabc5e23 | 430 | // |
clemente | 10:82ac06669316 | 431 | if ( dt[0] > 0x7f) { |
clemente | 10:82ac06669316 | 432 | // negative number |
clemente | 10:82ac06669316 | 433 | if ( dt[0] & 0x80) |
clemente | 10:82ac06669316 | 434 | prs |= 0xFFFC0000; // set at 1 the bits to complete the word len |
clemente | 10:82ac06669316 | 435 | else |
clemente | 10:82ac06669316 | 436 | prs |= 0xFFFE0000; |
clemente | 10:82ac06669316 | 437 | tmp = ~prs + 1; // make the complemets. At this point all the bits are inverted. |
clemente | 10:82ac06669316 | 438 | fprs = (float)tmp * -1.0f; // set the signe.. |
clemente | 10:82ac06669316 | 439 | } else { |
clemente | 10:82ac06669316 | 440 | fprs = (float)prs * 1.0f; |
clemente | 10:82ac06669316 | 441 | } |
clemente | 10:82ac06669316 | 442 | |
clemente | 10:82ac06669316 | 443 | if ( dt[2] & 0x10) // I did some experiment to set the fractional parte. |
clemente | 10:82ac06669316 | 444 | fprs += 0.25f; // ** Warning: the DS is wrong! ** |
clemente | 0:cfecfabc5e23 | 445 | if ( dt[2] & 0x20) |
clemente | 0:cfecfabc5e23 | 446 | fprs += 0.5f; |
clemente | 10:82ac06669316 | 447 | |
clemente | 0:cfecfabc5e23 | 448 | return fprs; |
clemente | 0:cfecfabc5e23 | 449 | } |
clemente | 0:cfecfabc5e23 | 450 | |
clemente | 9:75a5960adf5c | 451 | float MPL3115A2::getTemperature( void) |
clemente | 9:75a5960adf5c | 452 | { |
clemente | 9:75a5960adf5c | 453 | float a; |
clemente | 9:75a5960adf5c | 454 | |
clemente | 9:75a5960adf5c | 455 | a = getTemperature( REG_TEMP_MSB); |
clemente | 9:75a5960adf5c | 456 | return a; |
clemente | 9:75a5960adf5c | 457 | } |
clemente | 0:cfecfabc5e23 | 458 | |
clemente | 9:75a5960adf5c | 459 | float MPL3115A2::getTemperature( unsigned char reg) |
clemente | 0:cfecfabc5e23 | 460 | { |
clemente | 0:cfecfabc5e23 | 461 | unsigned char dt[2]; |
clemente | 0:cfecfabc5e23 | 462 | unsigned short temp; |
clemente | 0:cfecfabc5e23 | 463 | float ftemp; |
clemente | 0:cfecfabc5e23 | 464 | |
clemente | 0:cfecfabc5e23 | 465 | /* |
clemente | 0:cfecfabc5e23 | 466 | * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0) |
clemente | 0:cfecfabc5e23 | 467 | * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4) |
clemente | 0:cfecfabc5e23 | 468 | */ |
clemente | 9:75a5960adf5c | 469 | readRegs( reg, &dt[0], 2); |
clemente | 0:cfecfabc5e23 | 470 | temp = dt[0]; |
clemente | 0:cfecfabc5e23 | 471 | // |
clemente | 0:cfecfabc5e23 | 472 | if ( dt[0] > 0x7F) { |
clemente | 0:cfecfabc5e23 | 473 | temp = ~temp + 1; |
clemente | 0:cfecfabc5e23 | 474 | ftemp = (float)temp * -1.0f; |
clemente | 0:cfecfabc5e23 | 475 | } else { |
clemente | 0:cfecfabc5e23 | 476 | ftemp = (float)temp * 1.0f; |
clemente | 0:cfecfabc5e23 | 477 | } |
clemente | 0:cfecfabc5e23 | 478 | // |
clemente | 0:cfecfabc5e23 | 479 | ftemp = ftemp+((float)(dt[1]>>4) * 0.0625f); |
clemente | 0:cfecfabc5e23 | 480 | return ftemp; |
clemente | 0:cfecfabc5e23 | 481 | |
clemente | 0:cfecfabc5e23 | 482 | } |
clemente | 0:cfecfabc5e23 | 483 | |
clemente | 9:75a5960adf5c | 484 | |
clemente | 5:9edec5ee8bf4 | 485 | unsigned int MPL3115A2::getAllDataRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 486 | { |
clemente | 6:03c24251e500 | 487 | // Check for Press/Alti and Temp value ready |
clemente | 6:03c24251e500 | 488 | if ( isDataAvailable() & PTDR_STATUS) { |
clemente | 6:03c24251e500 | 489 | if ( MPL3115A2_mode == ALTIMETER_MODE) { |
clemente | 6:03c24251e500 | 490 | getAltimeterRaw( &dt[0]); // 3 bytes |
clemente | 6:03c24251e500 | 491 | } else { |
clemente | 6:03c24251e500 | 492 | getPressureRaw( &dt[0]); // 3 bytes |
clemente | 6:03c24251e500 | 493 | } |
clemente | 6:03c24251e500 | 494 | |
clemente | 6:03c24251e500 | 495 | getTemperatureRaw( &dt[3]); // 2 bytes |
clemente | 6:03c24251e500 | 496 | |
clemente | 6:03c24251e500 | 497 | return 1; |
clemente | 5:9edec5ee8bf4 | 498 | } else { |
clemente | 6:03c24251e500 | 499 | return 0; |
clemente | 5:9edec5ee8bf4 | 500 | } |
clemente | 5:9edec5ee8bf4 | 501 | } |
clemente | 5:9edec5ee8bf4 | 502 | |
clemente | 5:9edec5ee8bf4 | 503 | unsigned int MPL3115A2::getAltimeterRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 504 | { |
clemente | 5:9edec5ee8bf4 | 505 | |
clemente | 5:9edec5ee8bf4 | 506 | /* |
clemente | 5:9edec5ee8bf4 | 507 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 508 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 509 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 5:9edec5ee8bf4 | 510 | */ |
clemente | 6:03c24251e500 | 511 | |
clemente | 6:03c24251e500 | 512 | // Check for Press/Alti value ready |
clemente | 6:03c24251e500 | 513 | if ( isDataAvailable() & PDR_STATUS) { |
clemente | 6:03c24251e500 | 514 | readRegs( REG_ALTIMETER_MSB, &dt[0], 3); |
clemente | 6:03c24251e500 | 515 | return 1; |
clemente | 6:03c24251e500 | 516 | } else |
clemente | 6:03c24251e500 | 517 | return 0; |
clemente | 5:9edec5ee8bf4 | 518 | } |
clemente | 5:9edec5ee8bf4 | 519 | |
clemente | 5:9edec5ee8bf4 | 520 | unsigned int MPL3115A2::getPressureRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 521 | { |
clemente | 5:9edec5ee8bf4 | 522 | |
clemente | 5:9edec5ee8bf4 | 523 | /* |
clemente | 5:9edec5ee8bf4 | 524 | * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 525 | * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 526 | * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4) |
clemente | 5:9edec5ee8bf4 | 527 | */ |
clemente | 6:03c24251e500 | 528 | |
clemente | 6:03c24251e500 | 529 | // Check for Press/Alti value ready |
clemente | 6:03c24251e500 | 530 | if ( isDataAvailable() & PDR_STATUS) { |
clemente | 6:03c24251e500 | 531 | readRegs( REG_PRESSURE_MSB, &dt[0], 3); |
clemente | 6:03c24251e500 | 532 | return 1; |
clemente | 6:03c24251e500 | 533 | } else |
clemente | 6:03c24251e500 | 534 | return 0; |
clemente | 6:03c24251e500 | 535 | |
clemente | 5:9edec5ee8bf4 | 536 | } |
clemente | 5:9edec5ee8bf4 | 537 | |
clemente | 5:9edec5ee8bf4 | 538 | unsigned int MPL3115A2::getTemperatureRaw( unsigned char *dt) |
clemente | 5:9edec5ee8bf4 | 539 | { |
clemente | 5:9edec5ee8bf4 | 540 | |
clemente | 5:9edec5ee8bf4 | 541 | /* |
clemente | 5:9edec5ee8bf4 | 542 | * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0) |
clemente | 5:9edec5ee8bf4 | 543 | * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4) |
clemente | 5:9edec5ee8bf4 | 544 | */ |
clemente | 6:03c24251e500 | 545 | |
clemente | 6:03c24251e500 | 546 | // Check for Temp value ready |
clemente | 6:03c24251e500 | 547 | if ( isDataAvailable() & TDR_STATUS) { |
clemente | 6:03c24251e500 | 548 | readRegs( REG_TEMP_MSB, &dt[0], 2); |
clemente | 6:03c24251e500 | 549 | return 1; |
clemente | 6:03c24251e500 | 550 | } else |
clemente | 6:03c24251e500 | 551 | return 0; |
clemente | 5:9edec5ee8bf4 | 552 | } |
clemente | 5:9edec5ee8bf4 | 553 | |
clemente | 8:89ed6aeb5dbb | 554 | void MPL3115A2::SetPressureOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 555 | { |
clemente | 9:75a5960adf5c | 556 | unsigned char data [2] = {REG_OFF_P, offset}; |
clemente | 8:89ed6aeb5dbb | 557 | |
clemente | 8:89ed6aeb5dbb | 558 | Standby(); |
clemente | 8:89ed6aeb5dbb | 559 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 560 | |
clemente | 8:89ed6aeb5dbb | 561 | Active(); |
clemente | 8:89ed6aeb5dbb | 562 | } |
clemente | 8:89ed6aeb5dbb | 563 | |
clemente | 8:89ed6aeb5dbb | 564 | void MPL3115A2::SetTemperatureOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 565 | { |
clemente | 9:75a5960adf5c | 566 | unsigned char data [2] = {REG_OFF_T, offset}; |
clemente | 8:89ed6aeb5dbb | 567 | |
clemente | 8:89ed6aeb5dbb | 568 | Standby(); |
clemente | 8:89ed6aeb5dbb | 569 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 570 | |
clemente | 8:89ed6aeb5dbb | 571 | Active(); |
clemente | 8:89ed6aeb5dbb | 572 | } |
clemente | 8:89ed6aeb5dbb | 573 | |
clemente | 8:89ed6aeb5dbb | 574 | void MPL3115A2::SetAltitudeOffset( char offset) |
clemente | 8:89ed6aeb5dbb | 575 | { |
clemente | 9:75a5960adf5c | 576 | unsigned char data [2] = {REG_OFF_H, offset}; |
clemente | 8:89ed6aeb5dbb | 577 | |
clemente | 8:89ed6aeb5dbb | 578 | Standby(); |
clemente | 8:89ed6aeb5dbb | 579 | writeRegs(data,2); |
clemente | 8:89ed6aeb5dbb | 580 | |
clemente | 8:89ed6aeb5dbb | 581 | Active(); |
clemente | 8:89ed6aeb5dbb | 582 | } |
clemente | 8:89ed6aeb5dbb | 583 | |
clemente | 0:cfecfabc5e23 | 584 | void MPL3115A2::readRegs(int addr, uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 585 | char t[1] = {addr}; |
clemente | 0:cfecfabc5e23 | 586 | m_i2c.write(m_addr, t, 1, true); |
clemente | 0:cfecfabc5e23 | 587 | m_i2c.read(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 588 | } |
clemente | 0:cfecfabc5e23 | 589 | |
clemente | 0:cfecfabc5e23 | 590 | void MPL3115A2::writeRegs(uint8_t * data, int len) { |
clemente | 0:cfecfabc5e23 | 591 | m_i2c.write(m_addr, (char *)data, len); |
clemente | 0:cfecfabc5e23 | 592 | } |