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Diffstat (limited to 'drivers/sensors/pmw33xx_common.h')
| -rw-r--r-- | drivers/sensors/pmw33xx_common.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/sensors/pmw33xx_common.h b/drivers/sensors/pmw33xx_common.h new file mode 100644 index 0000000000..181bea3d43 --- /dev/null +++ b/drivers/sensors/pmw33xx_common.h @@ -0,0 +1,145 @@ +// Copyright 2022 Stefan Kerkmann (KarlK90) +// Copyright 2022 Ulrich Spörlein (@uqs) +// Copyright 2021 Alabastard (@Alabastard-64) +// Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com> +// Copyright 2019 Sunjun Kim +// Copyright 2020 Ploopy Corporation +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <stdint.h> +#include "spi_master.h" +#include "util.h" + +#if defined(POINTING_DEVICE_DRIVER_pmw3360) +# include "pmw3360.h" +#elif defined(POINTING_DEVICE_DRIVER_pmw3389) +# include "pmw3389.h" +#endif + +typedef struct __attribute__((packed)) { + union { + struct { + bool capture_from_raw_data : 1; // FRAME_RData_1st + uint8_t operation_mode : 2; // OP_MODE + bool is_lifted : 1; // Lift_stat + bool raw_data_grab_is_raw_data : 1; // RData_1st + uint8_t _reserved : 2; // 1 + Reserved + bool is_motion : 1; // MOT + } b; + uint8_t w; + } motion; + uint8_t observation; + int16_t delta_x; // displacement on x directions. Unit: Count. (CPI * Count = Inch value) + int16_t delta_y; // displacement on y directions. +} pmw33xx_report_t; + +_Static_assert(sizeof(pmw33xx_report_t) == 6, "pmw33xx_report_t must be 6 bytes in size"); +_Static_assert(sizeof((pmw33xx_report_t){0}.motion) == 1, "pmw33xx_report_t.motion must be 1 byte in size"); + +#if !defined(PMW33XX_CLOCK_SPEED) +# define PMW33XX_CLOCK_SPEED 2000000 +#endif + +#if !defined(PMW33XX_SPI_DIVISOR) +# ifdef __AVR__ +# define PMW33XX_SPI_DIVISOR (F_CPU / PMW33XX_CLOCK_SPEED) +# else +# define PMW33XX_SPI_DIVISOR 64 +# endif +#endif + +#if !defined(PMW33XX_LIFTOFF_DISTANCE) +# define PMW33XX_LIFTOFF_DISTANCE 0x02 +#endif + +#if !defined(ROTATIONAL_TRANSFORM_ANGLE) +# define ROTATIONAL_TRANSFORM_ANGLE 0x00 +#endif + +// Support single and plural spellings +#ifndef PMW33XX_CS_PINS +# ifndef PMW33XX_CS_PIN +# error "No chip select pin defined -- missing PMW33XX_CS_PIN or PMW33XX_CS_PINS" +# else +# define PMW33XX_CS_PINS \ + { PMW33XX_CS_PIN } +# endif +#endif + +#if PMW33XX_CPI > PMW33XX_CPI_MAX || PMW33XX_CPI < PMW33XX_CPI_MIN || (PMW33XX_CPI % PMW33XX_CPI_STEP) != 0U +# pragma message "PMW33XX_CPI has to be in the range of " STR(PMW33XX_CPI_MAX) "-" STR(PMW33XX_CPI_MIN) " in increments of " STR(PMW33XX_CPI_STEP) ". But it is " STR(PMW33XX_CPI) "." +# error Use correct PMW33XX_CPI value. +#endif + +#define CONSTRAIN(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt))) + +/** + * @brief Initializes the given sensor so it is in a working state and ready to + * be polled for data. + * + * @param sensor Index of the sensors chip select pin + * @return true Initialization was a success + * @return false Initialization failed, do not proceed operation + */ +bool __attribute__((cold)) pmw33xx_init(uint8_t sensor); + +/** + * @brief Gets the currently set CPI value from the sensor. CPI is often + * refereed to as the sensors sensitivity. + * + * @param sensor Index of the sensors chip select pin + * @return uint16_t Current CPI value of the sensor + */ +uint16_t pmw33xx_get_cpi(uint8_t sensor); + +/** + * @brief Sets the given CPI value for the given PMW33XX sensor. CIP is often + * refereed to as the sensors sensitivity. Values outside of the allow range are + * constrained into legal values. + * + * @param sensor Index of the sensors chip select pin + * @param cpi CPI value to set, legal range depends on the PMW sensor type + */ +void pmw33xx_set_cpi(uint8_t sensor, uint16_t cpi); + +/** + * @brief Sets the given CPI value to all registered PMW33XX sensors. CPI is + * often refereed to as the sensors sensitivity. Values outside of the allow + * range are constrained into legal values. + * + * @param sensor Index of the sensors chip select pin + * @param cpi CPI value to set, legal range depends on the PMW sensor type + */ +void pmw33xx_set_cpi_all_sensors(uint16_t cpi); + +/** + * @brief Reads and clears the current delta, and motion register values on the + * given sensor. + * + * @param sensor Index of the sensors chip select pin + * @return pmw33xx_report_t Current values of the sensor, if errors occurred all + * fields are set to zero + */ +pmw33xx_report_t pmw33xx_read_burst(uint8_t sensor); + +/** + * @brief Read one byte of data from the given register on the sensor + * + * @param sensor Index of the sensors chip select pin + * @param reg_addr Register address to read from + * @return uint8_t + */ +uint8_t pmw33xx_read(uint8_t sensor, uint8_t reg_addr); + +/** + * @brief Writes one byte of data to the given register on the sensor + * + * @param sensor Index of the sensors chip select pin + * @param reg_addr Registers address to write to + * @param data Data to write to the register + * @return true Write was a success + * @return false Write failed, do not proceed operation + */ +bool pmw33xx_write(uint8_t sensor, uint8_t reg_addr, uint8_t data); |