Pathfindr / Mbed OS mbed-os-PF-UWBBEACON_v1_dev

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Dependencies:   aconno_I2C Lis2dh12 WatchdogTimer

sensors.cpp@9:b0a1535b8ef2, 2018-12-15 (annotated)

Committer:
pathfindr
Date:
Sat Dec 15 13:45:28 2018 +0000
Revision:
9:b0a1535b8ef2
Parent:
7:e9a19750700d
Child:
13:29f67f256709
sat

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pathfindr 7:e9a19750700d 1 #include "sensors.h"
pathfindr 7:e9a19750700d 2
pathfindr 7:e9a19750700d 3 //------------------------------------------------------------------------------
pathfindr 7:e9a19750700d 4 // ACCELEROMETER
pathfindr 7:e9a19750700d 5 //------------------------------------------------------------------------------
pathfindr 7:e9a19750700d 6
pathfindr 7:e9a19750700d 7 DigitalIn lis3dh_int1(PN_ACC_INT1, PullNone); //DISTUBANCE
pathfindr 7:e9a19750700d 8 DigitalIn lis3dh_int2(PN_ACC_INT2, PullNone); //IMPACT
pathfindr 7:e9a19750700d 9
pathfindr 9:b0a1535b8ef2 10 void lis3dh_configureForSleep(uint8_t motion_threshold, uint8_t impact_threshold) {
pathfindr 7:e9a19750700d 11 //init
pathfindr 7:e9a19750700d 12 LIS3DH lis3dh(PN_SPI_MOSI, PN_SPI_MISO, PN_SPI_CS0, PN_SPI_CLK);
pathfindr 7:e9a19750700d 13 requireSoftReset = true; //WE HAVE STARTED SPI SO NEED THIS
pathfindr 9:b0a1535b8ef2 14
pathfindr 7:e9a19750700d 15 //Mode
pathfindr 9:b0a1535b8ef2 16 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG1, 0b00111111); // 00111111 25hz low power mode all axis. 50hz = 6ua / 25hz = 4ua / 10hz = 3ua
pathfindr 9:b0a1535b8ef2 17 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG2, 0b11001011); // HP Filter with 0.2hz@25hz for both INT1 and INT2 and Data //http://www.st.com/content/ccc/resource/technical/document/application_note/77/ed/e7/e1/28/5a/45/d6/CD00290365.pdf/files/CD00290365.pdf/jcr:content/translations/en.CD00290365.pdf
pathfindr 9:b0a1535b8ef2 18
pathfindr 9:b0a1535b8ef2 19 //g and Resolution
pathfindr 9:b0a1535b8ef2 20 //lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG4, 0b00110000); // disable highresoluton , set 16g
pathfindr 9:b0a1535b8ef2 21 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG4, 0b00100000); // disable highresoluton , set 8g
pathfindr 9:b0a1535b8ef2 22 //lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG4, 0b00010000); // disable highresoluton , set 4g
pathfindr 9:b0a1535b8ef2 23 //lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG4, 0b00000000); // disable highresoluton , set 2g
pathfindr 9:b0a1535b8ef2 24
pathfindr 9:b0a1535b8ef2 25 //interrupt setup
pathfindr 9:b0a1535b8ef2 26 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG5, 0b00001010); // Latch INT1 and INT2
pathfindr 9:b0a1535b8ef2 27
pathfindr 9:b0a1535b8ef2 28 //impact interrupt
pathfindr 9:b0a1535b8ef2 29 if (impact_threshold > 10) { //10 is a reasonable minimum value
pathfindr 9:b0a1535b8ef2 30 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG3, 0b01000000); // IA1 on INT1
pathfindr 9:b0a1535b8ef2 31 lis3dh.LIS3DH_WriteReg(LIS3DH_INT1_CFG, 0b00101010); // Enable X,Y,Z interrupt generation
pathfindr 9:b0a1535b8ef2 32 lis3dh.LIS3DH_WriteReg(LIS3DH_INT1_THS, impact_threshold);
pathfindr 9:b0a1535b8ef2 33 lis3dh.LIS3DH_WriteReg(LIS3DH_INT1_DURATION, 0x00); // Set duration to 0 cycle
pathfindr 9:b0a1535b8ef2 34 } else {
pathfindr 9:b0a1535b8ef2 35 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG3, 0b00000000); // No IA1 on INT1
pathfindr 9:b0a1535b8ef2 36 lis3dh.LIS3DH_WriteReg(LIS3DH_INT1_CFG, 0b00000000); // Enable X,Y,Z interrupt generation
pathfindr 9:b0a1535b8ef2 37 }
pathfindr 9:b0a1535b8ef2 38
pathfindr 9:b0a1535b8ef2 39 //awake interrupt
pathfindr 9:b0a1535b8ef2 40 lis3dh.LIS3DH_WriteReg(LIS3DH_CTRL_REG6, 0b00100000); // IA2 on INT2
pathfindr 9:b0a1535b8ef2 41 lis3dh.LIS3DH_WriteReg(LIS3DH_INT2_CFG, 0b00101010); // Enable X,Y,Z interrupt generation
pathfindr 9:b0a1535b8ef2 42 lis3dh.LIS3DH_WriteReg(LIS3DH_INT2_THS, motion_threshold); // Set threshold
pathfindr 9:b0a1535b8ef2 43 lis3dh.LIS3DH_WriteReg(LIS3DH_INT2_DURATION, 0x00); // Set duration to 0 cycle
pathfindr 9:b0a1535b8ef2 44
pathfindr 9:b0a1535b8ef2 45 //Clear interrupts
pathfindr 7:e9a19750700d 46 lis3dh.LIS3DH_ResetInt1Latch();
pathfindr 9:b0a1535b8ef2 47 lis3dh.LIS3DH_ResetInt2Latch();
pathfindr 7:e9a19750700d 48 }