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// Copyright 2022 Daniel Kao (dkao)
// 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
#if ROTATIONAL_TRANSFORM_ANGLE > 127 || ROTATIONAL_TRANSFORM_ANGLE < (-127)
# error ROTATIONAL_TRANSFORM_ANGLE has to be in the range of +/- 127 for all PMW33XX sensors.
#endif
// Support single and plural spellings
#ifndef PMW33XX_CS_PINS
# ifndef PMW33XX_CS_PIN
# ifdef POINTING_DEVICE_CS_PIN
# define PMW33XX_CS_PIN POINTING_DEVICE_CS_PIN
# define PMW33XX_CS_PINS \
{ PMW33XX_CS_PIN }
# else
# error "No chip select pin defined -- missing PMW33XX_CS_PIN or PMW33XX_CS_PINS"
# endif
# 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);
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