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