/* 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> // 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 # error "No clock pin defined -- missing ADNS5050_SCLK_PIN" #endif #ifndef ADNS5050_SDIO_PIN # error "No data pin defined -- missing ADNS5050_SDIO_PIN" #endif #ifndef ADNS5050_CS_PIN # error "No chip select pin defined -- missing ADNS5050_CS_PIN" #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);