diff options
Diffstat (limited to 'watch-library/shared/driver/lis2dh.c')
| -rw-r--r-- | watch-library/shared/driver/lis2dh.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/watch-library/shared/driver/lis2dh.c b/watch-library/shared/driver/lis2dh.c deleted file mode 100644 index 20702bf5..00000000 --- a/watch-library/shared/driver/lis2dh.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * 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); -} - |