qmk-dactyl-manuform-a/drivers/sensors/pmw3360.h

/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
 * Copyright 2019 Sunjun Kim
 * Copyright 2020 Ploopy Corporation
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "spi_master.h"

// Registers
#define REG_Product_ID  0x00
#define REG_Revision_ID 0x01
#define REG_Motion  0x02
#define REG_Delta_X_L 0x03
#define REG_Delta_X_H 0x04
#define REG_Delta_Y_L 0x05
#define REG_Delta_Y_H 0x06
#define REG_SQUAL 0x07
#define REG_Raw_Data_Sum  0x08
#define REG_Maximum_Raw_data  0x09
#define REG_Minimum_Raw_data  0x0A
#define REG_Shutter_Lower 0x0B
#define REG_Shutter_Upper 0x0C
#define REG_Control 0x0D
#define REG_Config1 0x0F
#define REG_Config2 0x10
#define REG_Angle_Tune  0x11
#define REG_Frame_Capture 0x12
#define REG_SROM_Enable 0x13
#define REG_Run_Downshift 0x14
#define REG_Rest1_Rate_Lower  0x15
#define REG_Rest1_Rate_Upper  0x16
#define REG_Rest1_Downshift 0x17
#define REG_Rest2_Rate_Lower  0x18
#define REG_Rest2_Rate_Upper  0x19
#define REG_Rest2_Downshift 0x1A
#define REG_Rest3_Rate_Lower  0x1B
#define REG_Rest3_Rate_Upper  0x1C
#define REG_Observation 0x24
#define REG_Data_Out_Lower  0x25
#define REG_Data_Out_Upper  0x26
#define REG_Raw_Data_Dump 0x29
#define REG_SROM_ID 0x2A
#define REG_Min_SQ_Run  0x2B
#define REG_Raw_Data_Threshold  0x2C
#define REG_Config5 0x2F
#define REG_Power_Up_Reset  0x3A
#define REG_Shutdown  0x3B
#define REG_Inverse_Product_ID  0x3F
#define REG_LiftCutoff_Tune3  0x41
#define REG_Angle_Snap  0x42
#define REG_LiftCutoff_Tune1  0x4A
#define REG_Motion_Burst  0x50
#define REG_LiftCutoff_Tune_Timeout 0x58
#define REG_LiftCutoff_Tune_Min_Length  0x5A
#define REG_SROM_Load_Burst 0x62
#define REG_Lift_Config 0x63
#define REG_Raw_Data_Burst  0x64
#define REG_LiftCutoff_Tune2  0x65

#ifdef CONSOLE_ENABLE
void print_byte(uint8_t byte);
#endif

typedef struct {
    int8_t  motion;
    bool    isMotion;     // True if a motion is detected.
    bool    isOnSurface;  // True when a chip is on a surface
    int16_t dx;           // displacement on x directions. Unit: Count. (CPI * Count = Inch value)
    int8_t  mdx;
    int16_t dy;  // displacement on y directions.
    int8_t  mdy;
} report_pmw_t;



bool spi_start_adv(void);
void spi_stop_adv(void);
spi_status_t spi_write_adv(uint8_t reg_addr, uint8_t data);
uint8_t spi_read_adv(uint8_t reg_addr);
bool pmw_spi_init(void);
void pmw_set_cpi(uint16_t cpi);
uint16_t pmw_get_cpi(void);
void pmw_upload_firmware(void);
bool pmw_check_signature(void);
report_pmw_t pmw_read_burst(void);


#define degToRad(angleInDegrees) ((angleInDegrees)*M_PI / 180.0)
#define radToDeg(angleInRadians) ((angleInRadians)*180.0 / M_PI)
#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))