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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 <stdbool.h>
#include <stdint.h>
// CPI values
// clang-format off
#define CPI125 0x11
#define CPI250 0x12
#define CPI375 0x13
#define CPI500 0x14
#define CPI625 0x15
#define CPI750 0x16
#define CPI875 0x17
#define CPI1000 0x18
#define CPI1125 0x19
#define CPI1250 0x1a
#define CPI1375 0x1b
// clang-format on
#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
// Definitions for the ADNS serial line.
#ifndef ADNS5050_SCLK_PIN
# ifdef POINTING_DEVICE_SCLK_PIN
# define ADNS5050_SCLK_PIN POINTING_DEVICE_SCLK_PIN
# else
# error "No clock pin defined -- missing POINTING_DEVICE_SCLK_PIN or ADNS5050_SCLK_PIN"
# endif
#endif
#ifndef ADNS5050_SDIO_PIN
# ifdef POINTING_DEVICE_SDIO_PIN
# define ADNS5050_SDIO_PIN POINTING_DEVICE_SDIO_PIN
# else
# error "No data pin defined -- missing POINTING_DEVICE_SDIO_PIN or ADNS5050_SDIO_PIN"
# endif
#endif
#ifndef ADNS5050_CS_PIN
# ifdef POINTING_DEVICE_CS_PIN
# define ADNS5050_CS_PIN POINTING_DEVICE_CS_PIN
# else
# error "No chip select pin defined -- missing POINTING_DEVICE_CS_PIN or ADNS5050_CS_PIN define"
# endif
#endif
typedef struct {
int8_t dx;
int8_t dy;
} report_adns5050_t;
// A bunch of functions to implement the ADNS5050-specific serial protocol.
// Note that the "serial.h" driver is insufficient, because it does not
// manually manipulate a serial clock signal.
void adns5050_init(void);
void adns5050_sync(void);
uint8_t adns5050_serial_read(void);
void adns5050_serial_write(uint8_t data);
uint8_t adns5050_read_reg(uint8_t reg_addr);
void adns5050_write_reg(uint8_t reg_addr, uint8_t data);
report_adns5050_t adns5050_read_burst(void);
void adns5050_set_cpi(uint16_t cpi);
uint16_t adns5050_get_cpi(void);
int8_t convert_twoscomp(uint8_t data);
bool adns5050_check_signature(void);
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