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/* Copyright 2021 Colin Lam (Ploopy Corporation)
* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
* Copyright 2019 Sunjun Kim
* Copyright 2019 Hiroyuki Okada
*
* 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 <stdint.h>
#include <stdbool.h>
#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
// Definitions for the PMW3320 serial line.
#ifndef PMW3320_SCLK_PIN
# ifdef POINTING_DEVICE_SCLK_PIN
# define PMW3320_SCLK_PIN POINTING_DEVICE_SCLK_PIN
# else
# error "No clock pin defined -- missing POINTING_DEVICE_SCLK_PIN or PMW3320_SCLK_PIN"
# endif
#endif
#ifndef PMW3320_SDIO_PIN
# ifdef POINTING_DEVICE_SDIO_PIN
# define PMW3320_SDIO_PIN POINTING_DEVICE_SDIO_PIN
# else
# error "No data pin defined -- missing POINTING_DEVICE_SDIO_PIN or PMW3320_SDIO_PIN"
# endif
#endif
#ifndef PMW3320_CS_PIN
# ifdef POINTING_DEVICE_CS_PIN
# define PMW3320_CS_PIN POINTING_DEVICE_CS_PIN
# else
# error "No chip select pin defined -- missing POINTING_DEVICE_CS_PIN or PMW3320_CS_PIN define"
# endif
#endif
typedef struct {
int8_t dx;
int8_t dy;
} report_pmw3320_t;
// A bunch of functions to implement the PMW3320-specific serial protocol.
// Mostly taken from ADNS5050 driver.
// Note that the "serial.h" driver is insufficient, because it does not
// manually manipulate a serial clock signal.
void pmw3320_init(void);
void pmw3320_sync(void);
uint8_t pmw3320_serial_read(void);
void pmw3320_serial_write(uint8_t data);
uint8_t pmw3320_read_reg(uint8_t reg_addr);
void pmw3320_write_reg(uint8_t reg_addr, uint8_t data);
report_pmw3320_t pmw3320_read_burst(void);
void pmw3320_set_cpi(uint16_t cpi);
uint16_t pmw3320_get_cpi(void);
int8_t convert_twoscomp(uint8_t data);
bool pmw3320_check_signature(void);
#if !defined(PMW3320_CPI)
# define PMW3320_CPI 1000
#endif
#define PMW3320_CPI_STEP 250
#define PMW3320_CPI_MIN 250
#define PMW3320_CPI_MAX 3500
// PMW3320 register addresses
// clang-format off
#define REG_Product_ID 0x00
#define REG_Revision_ID 0x01
#define REG_Motion 0x02
#define REG_Delta_X 0x03
#define REG_Delta_Y 0x04
#define REG_SQUAL 0x05
#define REG_Shutter_Upper 0x06
#define REG_Shutter_Lower 0x07
#define REG_Maximum_Pixel 0x08
#define REG_Pixel_Accum 0x09
#define REG_Minimum_Pixel 0x0a
#define REG_Pixel_Grab 0x0b
#define REG_Delta_XY 0x0c
#define REG_Resolution 0x0d
#define REG_Run_Downshift 0x0e
#define REG_Rest1_Period 0x0f
#define REG_Rest1_Downshift 0x10
#define REG_Rest2_Preiod 0x11
#define REG_Rest2_Downshift 0x12
#define REG_Rest3_Period 0x13
#define REG_Min_SQ_Run 0x17
#define REG_Axis_Control 0x1a
#define REG_Performance 0x22
#define REG_Low_Motion_Jitter 0x23
#define REG_Shutter_Max_HI 0x36
#define REG_Shutter_Max_LO 0x37
#define REG_Frame_Rate 0x39
#define REG_Power_Up_Reset 0x3a
#define REG_Shutdown 0x3b
#define REG_Inverse_Revision_ID 0x3f
#define REG_Led_Control 0x40
#define REG_Motion_Control 0x41
#define REG_Burst_Read_First 0x42
#define REG_Rest_Mode_Status 0x45
#define REG_Inverse_Product_ID 0x4f
#define REG_Motion_Burst 0x63
// clang-format on
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