LPS22HB library
LPS22HB.cpp@3:755ac86eb6fd, 2017-03-19 (annotated)
- Committer:
- feunoir
- Date:
- Sun Mar 19 09:07:48 2017 +0000
- Revision:
- 3:755ac86eb6fd
- Parent:
- 1:5f21b0eac2c2
- Child:
- 4:50be6522da7f
some optimization
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
feunoir | 1:5f21b0eac2c2 | 1 | /* |
feunoir | 1:5f21b0eac2c2 | 2 | * mbed library program |
feunoir | 1:5f21b0eac2c2 | 3 | * LPS25H MEMS pressure sensor: 260-1260 hPa absolute digital output barometer |
feunoir | 1:5f21b0eac2c2 | 4 | * made by STMicroelectronics |
feunoir | 1:5f21b0eac2c2 | 5 | * http://www.st-japan.co.jp/web/catalog/sense_power/FM89/SC1316/PF255230?s_searchtype=partnumber |
feunoir | 1:5f21b0eac2c2 | 6 | * |
feunoir | 1:5f21b0eac2c2 | 7 | * Copyright (c) 2015 Kenji Arai / JH1PJL |
feunoir | 1:5f21b0eac2c2 | 8 | * http://www.page.sannet.ne.jp/kenjia/index.html |
feunoir | 1:5f21b0eac2c2 | 9 | * http://mbed.org/users/kenjiArai/ |
feunoir | 1:5f21b0eac2c2 | 10 | * Created: Feburary 21st, 2015 |
feunoir | 1:5f21b0eac2c2 | 11 | * Revised: Feburary 22nd, 2015 |
feunoir | 1:5f21b0eac2c2 | 12 | * |
feunoir | 1:5f21b0eac2c2 | 13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
feunoir | 1:5f21b0eac2c2 | 14 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE |
feunoir | 1:5f21b0eac2c2 | 15 | * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
feunoir | 1:5f21b0eac2c2 | 16 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
feunoir | 1:5f21b0eac2c2 | 17 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
feunoir | 1:5f21b0eac2c2 | 18 | */ |
feunoir | 1:5f21b0eac2c2 | 19 | |
feunoir | 1:5f21b0eac2c2 | 20 | #include "LPS22HB.h" |
feunoir | 1:5f21b0eac2c2 | 21 | |
feunoir | 3:755ac86eb6fd | 22 | LPS22HB::LPS22HB (PinName p_sda, PinName p_scl, uint8_t addr) |
feunoir | 3:755ac86eb6fd | 23 | : |
feunoir | 3:755ac86eb6fd | 24 | i2c_p(new I2C(p_sda, p_scl)), |
feunoir | 3:755ac86eb6fd | 25 | _i2c(*i2c_p) |
feunoir | 1:5f21b0eac2c2 | 26 | { |
feunoir | 1:5f21b0eac2c2 | 27 | LPS22HB_addr = addr; |
feunoir | 1:5f21b0eac2c2 | 28 | init(); |
feunoir | 1:5f21b0eac2c2 | 29 | } |
feunoir | 1:5f21b0eac2c2 | 30 | |
feunoir | 3:755ac86eb6fd | 31 | LPS22HB::LPS22HB (I2C& p_i2c, uint8_t addr) |
feunoir | 3:755ac86eb6fd | 32 | : |
feunoir | 3:755ac86eb6fd | 33 | i2c_p(NULL), |
feunoir | 3:755ac86eb6fd | 34 | _i2c(p_i2c) |
feunoir | 1:5f21b0eac2c2 | 35 | { |
feunoir | 1:5f21b0eac2c2 | 36 | LPS22HB_addr = addr; |
feunoir | 1:5f21b0eac2c2 | 37 | init(); |
feunoir | 1:5f21b0eac2c2 | 38 | } |
feunoir | 1:5f21b0eac2c2 | 39 | |
feunoir | 3:755ac86eb6fd | 40 | LPS22HB::~LPS22HB() |
feunoir | 1:5f21b0eac2c2 | 41 | { |
feunoir | 3:755ac86eb6fd | 42 | if( NULL != i2c_p ) |
feunoir | 3:755ac86eb6fd | 43 | delete i2c_p; |
feunoir | 3:755ac86eb6fd | 44 | } |
feunoir | 1:5f21b0eac2c2 | 45 | |
feunoir | 1:5f21b0eac2c2 | 46 | /////////////// Initialize //////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 47 | void LPS22HB::init(void) |
feunoir | 1:5f21b0eac2c2 | 48 | { |
feunoir | 3:755ac86eb6fd | 49 | //_i2c.frequency(400000); |
feunoir | 1:5f21b0eac2c2 | 50 | // Check acc is available of not |
feunoir | 1:5f21b0eac2c2 | 51 | dt[0] = LPS22HB_WHO_AM_I; |
feunoir | 1:5f21b0eac2c2 | 52 | _i2c.write(LPS22HB_addr, dt, 1, true); |
feunoir | 1:5f21b0eac2c2 | 53 | _i2c.read(LPS22HB_addr, dt, 1, false); |
feunoir | 1:5f21b0eac2c2 | 54 | if (dt[0] == I_AM_LPS22HB) { |
feunoir | 1:5f21b0eac2c2 | 55 | LPS22HB_id = I_AM_LPS22HB; |
feunoir | 1:5f21b0eac2c2 | 56 | LPS22HB_ready = 1; |
feunoir | 1:5f21b0eac2c2 | 57 | } else { |
feunoir | 1:5f21b0eac2c2 | 58 | LPS22HB_id = 0; |
feunoir | 1:5f21b0eac2c2 | 59 | LPS22HB_ready = 0; |
feunoir | 1:5f21b0eac2c2 | 60 | return; // acc chip is NOT on I2C line then terminate |
feunoir | 1:5f21b0eac2c2 | 61 | } |
feunoir | 1:5f21b0eac2c2 | 62 | |
feunoir | 3:755ac86eb6fd | 63 | set_odr(LPS22HB_ODR_1HZ); |
feunoir | 1:5f21b0eac2c2 | 64 | } |
feunoir | 1:5f21b0eac2c2 | 65 | |
feunoir | 1:5f21b0eac2c2 | 66 | /////////////// Start conv. and gwt all data ////////////// |
feunoir | 1:5f21b0eac2c2 | 67 | void LPS22HB::get(void) |
feunoir | 1:5f21b0eac2c2 | 68 | { |
feunoir | 1:5f21b0eac2c2 | 69 | if (LPS22HB_ready == 0) { |
feunoir | 1:5f21b0eac2c2 | 70 | press = 0; |
feunoir | 1:5f21b0eac2c2 | 71 | temp = 0; |
feunoir | 1:5f21b0eac2c2 | 72 | return; |
feunoir | 1:5f21b0eac2c2 | 73 | } |
feunoir | 1:5f21b0eac2c2 | 74 | dt[0] = LPS22HB_PRESS_POUT_XL | 0x80; |
feunoir | 1:5f21b0eac2c2 | 75 | _i2c.write(LPS22HB_addr, dt, 1, true); |
feunoir | 1:5f21b0eac2c2 | 76 | _i2c.read(LPS22HB_addr, dt, 3, false); |
feunoir | 1:5f21b0eac2c2 | 77 | press = dt[2] << 16 | dt[1] << 8 | dt[0]; |
feunoir | 1:5f21b0eac2c2 | 78 | dt[0] = LPS22HB_TEMP_OUT_L | 0x80; |
feunoir | 1:5f21b0eac2c2 | 79 | _i2c.write(LPS22HB_addr, dt, 1, true); |
feunoir | 1:5f21b0eac2c2 | 80 | _i2c.read(LPS22HB_addr, dt, 2, false); |
feunoir | 1:5f21b0eac2c2 | 81 | temp = dt[1] << 8 | dt[0]; |
feunoir | 1:5f21b0eac2c2 | 82 | } |
feunoir | 1:5f21b0eac2c2 | 83 | |
feunoir | 1:5f21b0eac2c2 | 84 | /////////////// Read data from sensor ///////////////////// |
feunoir | 1:5f21b0eac2c2 | 85 | float LPS22HB::pressure() |
feunoir | 1:5f21b0eac2c2 | 86 | { |
feunoir | 3:755ac86eb6fd | 87 | return (float)press / 4096.0f; |
feunoir | 3:755ac86eb6fd | 88 | } |
feunoir | 3:755ac86eb6fd | 89 | |
feunoir | 3:755ac86eb6fd | 90 | //add by user |
feunoir | 3:755ac86eb6fd | 91 | uint32_t LPS22HB::pressure_raw() |
feunoir | 3:755ac86eb6fd | 92 | { |
feunoir | 3:755ac86eb6fd | 93 | return press; |
feunoir | 1:5f21b0eac2c2 | 94 | } |
feunoir | 1:5f21b0eac2c2 | 95 | |
feunoir | 1:5f21b0eac2c2 | 96 | /////////////// Read data from sensor ///////////////////// |
feunoir | 1:5f21b0eac2c2 | 97 | float LPS22HB::temperature() |
feunoir | 1:5f21b0eac2c2 | 98 | { |
feunoir | 3:755ac86eb6fd | 99 | return (float)temp / 100.0f; |
feunoir | 3:755ac86eb6fd | 100 | } |
feunoir | 3:755ac86eb6fd | 101 | |
feunoir | 3:755ac86eb6fd | 102 | //add by user |
feunoir | 3:755ac86eb6fd | 103 | int16_t LPS22HB::temperature_raw() |
feunoir | 3:755ac86eb6fd | 104 | { |
feunoir | 3:755ac86eb6fd | 105 | return temp; |
feunoir | 1:5f21b0eac2c2 | 106 | } |
feunoir | 1:5f21b0eac2c2 | 107 | |
feunoir | 1:5f21b0eac2c2 | 108 | /////////////// ID //////////////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 109 | uint8_t LPS22HB::read_id() |
feunoir | 1:5f21b0eac2c2 | 110 | { |
feunoir | 1:5f21b0eac2c2 | 111 | dt[0] = LPS22HB_WHO_AM_I; |
feunoir | 1:5f21b0eac2c2 | 112 | _i2c.write(LPS22HB_addr, dt, 1, true); |
feunoir | 1:5f21b0eac2c2 | 113 | _i2c.read(LPS22HB_addr, dt, 1, false); |
feunoir | 1:5f21b0eac2c2 | 114 | return (uint8_t)dt[0]; |
feunoir | 1:5f21b0eac2c2 | 115 | } |
feunoir | 1:5f21b0eac2c2 | 116 | |
feunoir | 1:5f21b0eac2c2 | 117 | /////////////// I2C Freq. ///////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 118 | void LPS22HB::frequency(int hz) |
feunoir | 1:5f21b0eac2c2 | 119 | { |
feunoir | 1:5f21b0eac2c2 | 120 | _i2c.frequency(hz); |
feunoir | 1:5f21b0eac2c2 | 121 | } |
feunoir | 1:5f21b0eac2c2 | 122 | |
feunoir | 1:5f21b0eac2c2 | 123 | /////////////// General purpose R/W /////////////////////// |
feunoir | 1:5f21b0eac2c2 | 124 | uint8_t LPS22HB::read_reg(uint8_t addr) |
feunoir | 1:5f21b0eac2c2 | 125 | { |
feunoir | 1:5f21b0eac2c2 | 126 | if (LPS22HB_ready == 1) { |
feunoir | 1:5f21b0eac2c2 | 127 | dt[0] = addr; |
feunoir | 1:5f21b0eac2c2 | 128 | _i2c.write(LPS22HB_addr, dt, 1, true); |
feunoir | 1:5f21b0eac2c2 | 129 | _i2c.read(LPS22HB_addr, dt, 1, false); |
feunoir | 1:5f21b0eac2c2 | 130 | } else { |
feunoir | 1:5f21b0eac2c2 | 131 | dt[0] = 0xff; |
feunoir | 1:5f21b0eac2c2 | 132 | } |
feunoir | 1:5f21b0eac2c2 | 133 | return (uint8_t)dt[0]; |
feunoir | 1:5f21b0eac2c2 | 134 | } |
feunoir | 1:5f21b0eac2c2 | 135 | |
feunoir | 1:5f21b0eac2c2 | 136 | void LPS22HB::write_reg(uint8_t addr, uint8_t data) |
feunoir | 1:5f21b0eac2c2 | 137 | { |
feunoir | 1:5f21b0eac2c2 | 138 | if (LPS22HB_ready == 1) { |
feunoir | 1:5f21b0eac2c2 | 139 | dt[0] = addr; |
feunoir | 1:5f21b0eac2c2 | 140 | dt[1] = data; |
feunoir | 1:5f21b0eac2c2 | 141 | _i2c.write(LPS22HB_addr, dt, 2, false); |
feunoir | 1:5f21b0eac2c2 | 142 | } |
feunoir | 1:5f21b0eac2c2 | 143 | } |
feunoir | 1:5f21b0eac2c2 | 144 | |
feunoir | 1:5f21b0eac2c2 | 145 | /////////////// ODR /////////////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 146 | void LPS22HB::set_odr(lps22hb_odr odrcfg) |
feunoir | 1:5f21b0eac2c2 | 147 | { |
feunoir | 1:5f21b0eac2c2 | 148 | uint8_t temp = read_reg(LPS22HB_CTRL_REG1); |
feunoir | 1:5f21b0eac2c2 | 149 | temp &= 0xff ^ 0x70; |
feunoir | 1:5f21b0eac2c2 | 150 | temp |= odrcfg; |
feunoir | 1:5f21b0eac2c2 | 151 | write_reg(LPS22HB_CTRL_REG1, temp); |
feunoir | 1:5f21b0eac2c2 | 152 | } |
feunoir | 1:5f21b0eac2c2 | 153 | |
feunoir | 1:5f21b0eac2c2 | 154 | /////////////// LPF /////////////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 155 | void LPS22HB::set_lpf(lps22hb_lpf lpfcfg) |
feunoir | 1:5f21b0eac2c2 | 156 | { |
feunoir | 1:5f21b0eac2c2 | 157 | uint8_t temp = read_reg(LPS22HB_CTRL_REG1); |
feunoir | 1:5f21b0eac2c2 | 158 | temp &= 0xff ^ 0x0c; |
feunoir | 1:5f21b0eac2c2 | 159 | temp |= lpfcfg; |
feunoir | 1:5f21b0eac2c2 | 160 | write_reg(LPS22HB_CTRL_REG1, temp); |
feunoir | 1:5f21b0eac2c2 | 161 | } |
feunoir | 1:5f21b0eac2c2 | 162 | |
feunoir | 1:5f21b0eac2c2 | 163 | /////////////// DRDY ////////////////////////////////////// |
feunoir | 1:5f21b0eac2c2 | 164 | void LPS22HB::drdy(lps22hb_drdy drdycfg) |
feunoir | 1:5f21b0eac2c2 | 165 | { |
feunoir | 1:5f21b0eac2c2 | 166 | uint8_t temp = read_reg(LPS22HB_CTRL_REG3); |
feunoir | 1:5f21b0eac2c2 | 167 | temp &= 0xff ^ 0x04; |
feunoir | 1:5f21b0eac2c2 | 168 | temp |= drdycfg; |
feunoir | 1:5f21b0eac2c2 | 169 | write_reg(LPS22HB_CTRL_REG3, temp); |
feunoir | 1:5f21b0eac2c2 | 170 | } |