75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* 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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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>
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#ifndef PMW3360_CPI
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# define PMW3360_CPI 1600
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#endif
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#ifndef PMW3360_CLOCK_SPEED
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# define PMW3360_CLOCK_SPEED 2000000
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#endif
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#ifndef PMW3360_SPI_LSBFIRST
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# define PMW3360_SPI_LSBFIRST false
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#endif
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#ifndef PMW3360_SPI_MODE
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# define PMW3360_SPI_MODE 3
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#endif
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#ifndef PMW3360_SPI_DIVISOR
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# ifdef __AVR__
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# define PMW3360_SPI_DIVISOR (F_CPU / PMW3360_CLOCK_SPEED)
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# else
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# define PMW3360_SPI_DIVISOR 64
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# endif
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#endif
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#ifndef PMW3360_LIFTOFF_DISTANCE
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# define PMW3360_LIFTOFF_DISTANCE 0x02
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#endif
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#ifndef ROTATIONAL_TRANSFORM_ANGLE
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# define ROTATIONAL_TRANSFORM_ANGLE 0x00
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#endif
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#ifndef PMW3360_CS_PIN
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# error "No chip select pin defined -- missing PMW3360_CS_PIN"
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#endif
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typedef struct {
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int8_t motion;
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bool isMotion; // True if a motion is detected.
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bool isOnSurface; // True when a chip is on a surface
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int16_t dx; // displacement on x directions. Unit: Count. (CPI * Count = Inch value)
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int8_t mdx;
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int16_t dy; // displacement on y directions.
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int8_t mdy;
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} report_pmw3360_t;
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bool pmw3360_init(void);
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void pmw3360_upload_firmware(void);
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bool pmw3360_check_signature(void);
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uint16_t pmw3360_get_cpi(void);
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void pmw3360_set_cpi(uint16_t cpi);
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/* Reads and clears the current delta values on the sensor */
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report_pmw3360_t pmw3360_read_burst(void);
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