+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2021 Joey Castillo
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include "lis2dh.h"
-#include "watch.h"
-
-bool lis2dh_begin(void) {
- if (lis2dh_get_device_id() != LIS2DH_WHO_AM_I_VAL) {
- return false;
- }
- // Enable all axes, start at lowest possible data rate
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL1, LIS2DH_CTRL1_VAL_XEN |
- LIS2DH_CTRL1_VAL_YEN |
- LIS2DH_CTRL1_VAL_ZEN |
- LIS2DH_CTRL1_VAL_ODR_1HZ);
- // Set range to ±2G and enable block data update (output registers not updated until MSB and LSB have been read)
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL4, LIS2DH_CTRL4_VAL_BDU | LIS2DH_RANGE_2_G);
-
- return true;
-}
-
-uint8_t lis2dh_get_device_id(void) {
- return watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_WHO_AM_I);
-}
-
-bool lis2dh_have_new_data(void) {
- uint8_t retval = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_STATUS);
- return !!retval; // return true if any bit is set
-}
-
-lis2dh_reading lis2dh_get_raw_reading(void) {
- uint8_t buffer[6];
- uint8_t reg = LIS2DH_REG_OUT_X_L | 0x80; // set high bit for consecutive reads
- lis2dh_reading retval;
-
- watch_i2c_send(LIS2DH_ADDRESS, ®, 1);
- watch_i2c_receive(LIS2DH_ADDRESS, (uint8_t *)&buffer, 6);
-
- retval.x = buffer[0];
- retval.x |= ((uint16_t)buffer[1]) << 8;
- retval.y = buffer[2];
- retval.y |= ((uint16_t)buffer[3]) << 8;
- retval.z = buffer[4];
- retval.z |= ((uint16_t)buffer[5]) << 8;
-
- return retval;
-}
-
- lis2dh_acceleration_measurement lis2dh_get_acceleration_measurement(lis2dh_reading *out_reading) {
- lis2dh_reading reading = lis2dh_get_raw_reading();
- uint8_t range = lis2dh_get_range();
- if (out_reading != NULL) *out_reading = reading;
-
- // this bit is cribbed from Adafruit's LIS3DH driver; from their notes, the magic number below
- // converts from 16-bit lsb to 10-bit and divides by 1k to convert from milli-gs.
- // final value is raw_lsb => 10-bit lsb -> milli-gs -> gs
- uint8_t lsb_value = 1;
- if (range == LIS2DH_RANGE_2_G) lsb_value = 4;
- if (range == LIS2DH_RANGE_4_G) lsb_value = 8;
- if (range == LIS2DH_RANGE_8_G) lsb_value = 16;
- if (range == LIS2DH_RANGE_16_G) lsb_value = 48;
-
- lis2dh_acceleration_measurement retval;
-
- retval.x = lsb_value * ((float)reading.x / 64000.0);
- retval.y = lsb_value * ((float)reading.y / 64000.0);
- retval.z = lsb_value * ((float)reading.z / 64000.0);
-
- return retval;
-}
-
-void lis2dh_set_range(lis2dh_range_t range) {
- uint8_t val = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL4) & 0xCF;
- uint8_t bits = range << 4;
-
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL4, val | bits);
-}
-
-lis2dh_range_t lis2dh_get_range(void) {
- uint8_t retval = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL4) & 0x30;
- retval >>= 4;
- return (lis2dh_range_t)retval;
-}
-
-
-void lis2dh_set_data_rate(lis2dh_data_rate_t dataRate) {
- uint8_t val = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL1) & 0x0F;
- uint8_t bits = dataRate << 4;
-
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL1, val | bits);
-}
-
-lis2dh_data_rate_t lis2dh_get_data_rate(void) {
- return watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL1) >> 4;
-}
-
-void lis2dh_configure_aoi_int1(lis2dh_interrupt_configuration configuration, uint8_t threshold, uint8_t duration, bool latch) {
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL3, LIS2DH_CTRL3_VAL_I1_AOI1);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT1_CFG, configuration);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT1_THS, threshold);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT1_DUR, duration);
- uint8_t val = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL5) & 0xF7;
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL5, val | latch ? LIS2DH_CTRL5_VAL_LIR_INT1 : 0);
-}
-
-lis2dh_interrupt_state lis2dh_get_int1_state(void) {
- return (lis2dh_interrupt_state) watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_INT1_SRC);
-}
-
-void lis2dh_configure_aoi_int2(lis2dh_interrupt_configuration configuration, uint8_t threshold, uint8_t duration, bool latch) {
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL6, LIS2DH_CTRL6_VAL_I2_INT2);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT2_CFG, configuration);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT2_THS, threshold);
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_INT2_DUR, duration);
- uint8_t val = watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL5) & 0xFD;
- watch_i2c_write8(LIS2DH_ADDRESS, LIS2DH_REG_CTRL5, val | latch ? LIS2DH_CTRL5_VAL_LIR_INT2 : 0);
-}
-
-lis2dh_interrupt_state lis2dh_get_int2_state(void) {
- return (lis2dh_interrupt_state) watch_i2c_read8(LIS2DH_ADDRESS, LIS2DH_REG_INT2_SRC);
-}
-
+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2021 Joey Castillo
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#ifndef LIS2DH_H
-#define LIS2DH_H
-
-#include <stdbool.h>
-#include <stdint.h>
-
-typedef struct {
- int16_t x;
- int16_t y;
- int16_t z;
-} lis2dh_reading;
-
-typedef struct {
- float x;
- float y;
- float z;
-} lis2dh_acceleration_measurement;
-
-typedef enum {
- LIS2DH_RANGE_16_G = 0b11, // +/- 16g
- LIS2DH_RANGE_8_G = 0b10, // +/- 8g
- LIS2DH_RANGE_4_G = 0b01, // +/- 4g
- LIS2DH_RANGE_2_G = 0b00 // +/- 2g (default value)
-} lis2dh_range_t;
-
-typedef enum {
- LIS2DH_DATA_RATE_POWERDOWN = 0,
- LIS2DH_DATA_RATE_1_HZ = 0b0001,
- LIS2DH_DATA_RATE_10_HZ = 0b0010,
- LIS2DH_DATA_RATE_25_HZ = 0b0011,
- LIS2DH_DATA_RATE_50_HZ = 0b0100,
- LIS2DH_DATA_RATE_100_HZ = 0b0101,
- LIS2DH_DATA_RATE_200_HZ = 0b0110,
- LIS2DH_DATA_RATE_400_HZ = 0b0111,
- LIS2DH_DATA_RATE_LP1620HZ = 0b1000,
- LIS2DH_DATA_RATE_LP5376HZ = 0b1001,
-
-} lis2dh_data_rate_t;
-
-typedef enum {
- LIS2DH_INTERRUPT_CONFIGURATION_OR = 0b00000000,
- LIS2DH_INTERRUPT_CONFIGURATION_AND = 0b10000000,
- LIS2DH_INTERRUPT_CONFIGURATION_6D_MOVEMENT = 0b01000000,
- LIS2DH_INTERRUPT_CONFIGURATION_6D_POSITION = 0b11000000, // in 6D mode, these have an alternate meaning:
- LIS2DH_INTERRUPT_CONFIGURATION_Z_HIGH_ENABLE = 0b00100000, // Z up enable
- LIS2DH_INTERRUPT_CONFIGURATION_Z_LOW_ENABLE = 0b00010000, // Z down enable
- LIS2DH_INTERRUPT_CONFIGURATION_Y_HIGH_ENABLE = 0b00001000, // Y up enable
- LIS2DH_INTERRUPT_CONFIGURATION_Y_LOW_ENABLE = 0b00000100, // Y down enable
- LIS2DH_INTERRUPT_CONFIGURATION_X_HIGH_ENABLE = 0b00000010, // X up enable
- LIS2DH_INTERRUPT_CONFIGURATION_X_LOW_ENABLE = 0b00000001, // X down enable
-} lis2dh_interrupt_configuration;
-
-typedef enum {
- LIS2DH_INTERRUPT_STATE_ACTIVE = 0b01000000,
- LIS2DH_INTERRUPT_STATE_Z_HIGH = 0b00100000, // Z up
- LIS2DH_INTERRUPT_STATE_Z_LOW = 0b00010000, // Z down
- LIS2DH_INTERRUPT_STATE_Y_HIGH = 0b00001000, // Y up
- LIS2DH_INTERRUPT_STATE_Y_LOW = 0b00000100, // Y down
- LIS2DH_INTERRUPT_STATE_X_HIGH = 0b00000010, // X up
- LIS2DH_INTERRUPT_STATE_X_LOW = 0b00000001, // X down
-} lis2dh_interrupt_state;
-
-bool lis2dh_begin(void);
-
-uint8_t lis2dh_get_device_id(void);
-
-bool lis2dh_have_new_data(void);
-
-lis2dh_reading lis2dh_get_raw_reading(void);
-
-lis2dh_acceleration_measurement lis2dh_get_acceleration_measurement(lis2dh_reading *out_reading);
-
-void lis2dh_set_range(lis2dh_range_t range);
-
-lis2dh_range_t lis2dh_get_range(void);
-
-void lis2dh_set_data_rate(lis2dh_data_rate_t dataRate);
-
-lis2dh_data_rate_t lis2dh_get_data_rate(void);
-
-void lis2dh_configure_aoi_int1(lis2dh_interrupt_configuration configuration, uint8_t threshold, uint8_t duration, bool latch);
-
-lis2dh_interrupt_state lis2dh_get_int1_state(void);
-
-void lis2dh_configure_aoi_int2(lis2dh_interrupt_configuration configuration, uint8_t threshold, uint8_t duration, bool latch);
-
-lis2dh_interrupt_state lis2dh_get_int2_state(void);
-
-// Assumes SA0 is high; if low, its 0x18
-#define LIS2DH_ADDRESS (0x19)
-
-#define LIS2DH_REG_STATUS_AUX 0x07 ///< Auxiliary status register
-#define LIS2DH_REG_STATUS_AUX_TDA (1 << 2) ///< Temperature data available
-#define LIS2DH_REG_STATUS_AUX_TOR (1 << 6) ///< Temperature data overrun
-
-#define LIS2DH_REG_OUT_TEMP_L 0x0C ///< Temperature data low bit
-#define LIS2DH_REG_OUT_TEMP_H 0x0D ///< Temperature data high bit
-
-#define LIS2DH_REG_INT_COUNTER 0x0E
-
-#define LIS2DH_REG_WHO_AM_I 0x0F ///< Device identification, will read 0x33
-#define LIS2DH_WHO_AM_I_VAL 0x33 ///< Expected value of the WHO_AM_I register
-
-#define LIS2DH_REG_TEMP_CFG 0x1F ///< Temperature configuration; 0 to disable, 0xC0 to enable.
-#define LIS2DH_TEMP_CFG_VAL_ENABLE 0xC0 ///< Value for LIS2DH_REG_TEMP_CFG that enables temperature sensing.
-#define LIS2DH_TEMP_CFG_VAL_DISABLE 0x00 ///< Value for LIS2DH_REG_TEMP_CFG that disables temperature sensing.
-
-#define LIS2DH_REG_CTRL1 0x20 ///< CTRL_REG1 in the data sheet.
-#define LIS2DH_CTRL1_VAL_XEN 0b00000001 ///< Enable X-axis
-#define LIS2DH_CTRL1_VAL_YEN 0b00000010 ///< Enable Y-axis
-#define LIS2DH_CTRL1_VAL_ZEN 0b00000100 ///< Enable Z-axis
-#define LIS2DH_CTRL1_VAL_LPEN 0b00001000 ///< Enable low power mode
-#define LIS2DH_CTRL1_VAL_ODR_POWERDOWN 0 ///< Power down
-#define LIS2DH_CTRL1_VAL_ODR_1HZ (LIS2DH_DATA_RATE_1_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_10HZ (LIS2DH_DATA_RATE_10_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_25HZ (LIS2DH_DATA_RATE_25_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_50HZ (LIS2DH_DATA_RATE_50_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_100HZ (LIS2DH_DATA_RATE_100_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_200HZ (LIS2DH_DATA_RATE_200_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_400HZ (LIS2DH_DATA_RATE_400_HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_LP1620HZ (LIS2DH_DATA_RATE_LP1620HZ << 4)
-#define LIS2DH_CTRL1_VAL_ODR_LP5376HZ (LIS2DH_DATA_RATE_LP5376HZ << 4)
-
-#define LIS2DH_REG_CTRL2 0x21
-
-#define LIS2DH_REG_CTRL3 0x22
-#define LIS2DH_CTRL3_VAL_I1_CLICK 0b10000000
-#define LIS2DH_CTRL3_VAL_I1_AOI1 0b01000000
-#define LIS2DH_CTRL3_VAL_I1_AOI2 0b00100000
-#define LIS2DH_CTRL3_VAL_I1_DRDY1 0b00010000
-#define LIS2DH_CTRL3_VAL_I1_DRDY2 0b00001000
-#define LIS2DH_CTRL3_VAL_I1_WTM 0b00000100
-#define LIS2DH_CTRL3_VAL_I1_OVERRUN 0b00000010
-
-#define LIS2DH_REG_CTRL4 0x23
-#define LIS2DH_CTRL4_VAL_BDU 0b10000000
-#define LIS2DH_CTRL4_VAL_BLE 0b01000000
-#define LIS2DH_CTRL4_VAL_RANGE_2G (LIS2DH_RANGE_2_G << 4)
-#define LIS2DH_CTRL4_VAL_RANGE_4G (LIS2DH_RANGE_4_G << 4)
-#define LIS2DH_CTRL4_VAL_RANGE_8G (LIS2DH_RANGE_8_G << 4)
-#define LIS2DH_CTRL4_VAL_RANGE_16G (LIS2DH_RANGE_16_G << 4)
-#define LIS2DH_CTRL4_VAL_HR 0b00001000
-#define LIS2DH_CTRL4_VAL_ST0 0b00000000
-#define LIS2DH_CTRL4_VAL_ST1 0b00000000
-
-#define LIS2DH_REG_CTRL5 0x24
-#define LIS2DH_CTRL5_VAL_BOOT 0b10000000
-#define LIS2DH_CTRL5_VAL_FIFO_EN 0b01000000
-#define LIS2DH_CTRL5_VAL_LIR_INT1 0b00001000
-#define LIS2DH_CTRL5_VAL_D4D_INT1 0b00000100
-#define LIS2DH_CTRL5_VAL_LIR_INT2 0b00000010
-#define LIS2DH_CTRL5_VAL_D4D_INT2 0b00000001
-
-#define LIS2DH_REG_CTRL6 0x25
-#define LIS2DH_CTRL6_VAL_I2_CLICK 0b10000000
-#define LIS2DH_CTRL6_VAL_I2_INT1 0b01000000
-#define LIS2DH_CTRL6_VAL_I2_INT2 0b00100000
-#define LIS2DH_CTRL6_VAL_BOOT_I2 0b00010000
-#define LIS2DH_CTRL6_VAL_P2_ACT 0b00001000
-#define LIS2DH_CTRL6_VAL_H_L_ACTIVE 0b00000000
-
-#define LIS2DH_REG_REFERENCE 0x26
-
-#define LIS2DH_REG_STATUS 0x27
-#define LIS2DH_STATUS_VAL_ZYXOR 0b10000000
-#define LIS2DH_STATUS_VAL_ZOR 0b01000000
-#define LIS2DH_STATUS_VAL_YOR 0b00100000
-#define LIS2DH_STATUS_VAL_XOR 0b00010000
-#define LIS2DH_STATUS_VAL_ZYXDA 0b00001000
-#define LIS2DH_STATUS_VAL_ZDA 0b00000100
-#define LIS2DH_STATUS_VAL_YDA 0b00000010
-#define LIS2DH_STATUS_VAL_XDA 0b00000001
-
-#define LIS2DH_REG_OUT_X_L 0x28
-#define LIS2DH_REG_OUT_X_H 0x29
-#define LIS2DH_REG_OUT_Y_L 0x2A
-#define LIS2DH_REG_OUT_Y_H 0x2B
-#define LIS2DH_REG_OUT_Z_L 0x2C
-#define LIS2DH_REG_OUT_Z_H 0x2D
-
-#define LIS2DH_REG_FIFO_CTRL 0x2E
-#define LIS2DH_REG_FIFO_SRC 0x2F
-#define LIS2DH_REG_INT1_CFG 0x30
-#define LIS2DH_REG_INT1_SRC 0x31
-#define LIS2DH_REG_INT1_THS 0x32
-#define LIS2DH_REG_INT1_DUR 0x33
-#define LIS2DH_REG_INT2_CFG 0x34
-#define LIS2DH_REG_INT2_SRC 0x35
-#define LIS2DH_REG_INT2_THS 0x36
-#define LIS2DH_REG_INT2_DUR 0x37
-#define LIS2DH_REG_CLICK_CFG 0x38
-#define LIS2DH_REG_CLICK_SRC 0x39
-#define LIS2DH_REG_CLICK_THS 0x3A
-#define LIS2DH_REG_TIME_LIMIT 0x3B
-#define LIS2DH_REG_TIME_LATENCY 0x3C
-#define LIS2DH_REG_TIME_WINDOW 0x3D
-
-#endif // LIS2DH_H
projects / sensor-watch.git / commitdiff