156 lines
5.3 KiB
C
156 lines
5.3 KiB
C
// Copyright 2022 Daniel Kao (dkao)
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// Copyright 2022 Stefan Kerkmann (KarlK90)
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// Copyright 2022 Ulrich Spörlein (@uqs)
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// Copyright 2021 Alabastard (@Alabastard-64)
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// Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
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// Copyright 2019 Sunjun Kim
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// Copyright 2020 Ploopy Corporation
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <stdint.h>
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#include "spi_master.h"
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#include "util.h"
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#if defined(POINTING_DEVICE_DRIVER_pmw3360)
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# include "pmw3360.h"
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#elif defined(POINTING_DEVICE_DRIVER_pmw3389)
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# include "pmw3389.h"
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#endif
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typedef struct __attribute__((packed)) {
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union {
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struct {
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bool capture_from_raw_data : 1; // FRAME_RData_1st
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uint8_t operation_mode : 2; // OP_MODE
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bool is_lifted : 1; // Lift_stat
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bool raw_data_grab_is_raw_data : 1; // RData_1st
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uint8_t _reserved : 2; // 1 + Reserved
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bool is_motion : 1; // MOT
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} b;
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uint8_t w;
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} motion;
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uint8_t observation;
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int16_t delta_x; // displacement on x directions. Unit: Count. (CPI * Count = Inch value)
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int16_t delta_y; // displacement on y directions.
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} pmw33xx_report_t;
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_Static_assert(sizeof(pmw33xx_report_t) == 6, "pmw33xx_report_t must be 6 bytes in size");
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_Static_assert(sizeof((pmw33xx_report_t){0}.motion) == 1, "pmw33xx_report_t.motion must be 1 byte in size");
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#if !defined(PMW33XX_CLOCK_SPEED)
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# define PMW33XX_CLOCK_SPEED 2000000
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#endif
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#if !defined(PMW33XX_SPI_DIVISOR)
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# ifdef __AVR__
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# define PMW33XX_SPI_DIVISOR (F_CPU / PMW33XX_CLOCK_SPEED)
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# else
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# define PMW33XX_SPI_DIVISOR 64
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# endif
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#endif
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#if !defined(PMW33XX_LIFTOFF_DISTANCE)
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# define PMW33XX_LIFTOFF_DISTANCE 0x02
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#endif
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#if !defined(ROTATIONAL_TRANSFORM_ANGLE)
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# define ROTATIONAL_TRANSFORM_ANGLE 0x00
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#endif
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#if ROTATIONAL_TRANSFORM_ANGLE > 127 || ROTATIONAL_TRANSFORM_ANGLE < (-127)
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# error ROTATIONAL_TRANSFORM_ANGLE has to be in the range of +/- 127 for all PMW33XX sensors.
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#endif
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// Support single and plural spellings
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#ifndef PMW33XX_CS_PINS
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# ifndef PMW33XX_CS_PIN
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# ifdef POINTING_DEVICE_CS_PIN
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# define PMW33XX_CS_PIN POINTING_DEVICE_CS_PIN
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# define PMW33XX_CS_PINS \
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{ PMW33XX_CS_PIN }
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# else
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# error "No chip select pin defined -- missing PMW33XX_CS_PIN or PMW33XX_CS_PINS"
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# endif
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# else
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# define PMW33XX_CS_PINS \
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{ PMW33XX_CS_PIN }
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# endif
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#endif
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#if PMW33XX_CPI > PMW33XX_CPI_MAX || PMW33XX_CPI < PMW33XX_CPI_MIN || (PMW33XX_CPI % PMW33XX_CPI_STEP) != 0U
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# 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) "."
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# error Use correct PMW33XX_CPI value.
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#endif
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#define CONSTRAIN(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
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/**
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* @brief Initializes the given sensor so it is in a working state and ready to
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* be polled for data.
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*
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* @param sensor Index of the sensors chip select pin
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* @return true Initialization was a success
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* @return false Initialization failed, do not proceed operation
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*/
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bool __attribute__((cold)) pmw33xx_init(uint8_t sensor);
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/**
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* @brief Gets the currently set CPI value from the sensor. CPI is often
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* refereed to as the sensors sensitivity.
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*
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* @param sensor Index of the sensors chip select pin
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* @return uint16_t Current CPI value of the sensor
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*/
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uint16_t pmw33xx_get_cpi(uint8_t sensor);
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/**
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* @brief Sets the given CPI value for the given PMW33XX sensor. CIP is often
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* refereed to as the sensors sensitivity. Values outside of the allow range are
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* constrained into legal values.
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*
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* @param sensor Index of the sensors chip select pin
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* @param cpi CPI value to set, legal range depends on the PMW sensor type
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*/
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void pmw33xx_set_cpi(uint8_t sensor, uint16_t cpi);
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/**
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* @brief Sets the given CPI value to all registered PMW33XX sensors. CPI is
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* often refereed to as the sensors sensitivity. Values outside of the allow
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* range are constrained into legal values.
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*
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* @param sensor Index of the sensors chip select pin
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* @param cpi CPI value to set, legal range depends on the PMW sensor type
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*/
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void pmw33xx_set_cpi_all_sensors(uint16_t cpi);
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/**
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* @brief Reads and clears the current delta, and motion register values on the
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* given sensor.
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*
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* @param sensor Index of the sensors chip select pin
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* @return pmw33xx_report_t Current values of the sensor, if errors occurred all
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* fields are set to zero
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*/
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pmw33xx_report_t pmw33xx_read_burst(uint8_t sensor);
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/**
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* @brief Read one byte of data from the given register on the sensor
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*
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* @param sensor Index of the sensors chip select pin
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* @param reg_addr Register address to read from
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* @return uint8_t
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*/
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uint8_t pmw33xx_read(uint8_t sensor, uint8_t reg_addr);
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/**
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* @brief Writes one byte of data to the given register on the sensor
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*
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* @param sensor Index of the sensors chip select pin
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* @param reg_addr Registers address to write to
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* @param data Data to write to the register
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* @return true Write was a success
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* @return false Write failed, do not proceed operation
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*/
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bool pmw33xx_write(uint8_t sensor, uint8_t reg_addr, uint8_t data);
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