You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.8 KiB
110 lines
3.8 KiB
/* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
|
|
* Copyright 2021 Dasky (@daskygit)
|
|
*
|
|
* 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/>.
|
|
*/
|
|
#include "pimoroni_trackball.h"
|
|
#include "i2c_master.h"
|
|
#include "print.h"
|
|
#include "debug.h"
|
|
#include "timer.h"
|
|
|
|
// clang-format off
|
|
#define PIMORONI_TRACKBALL_REG_LED_RED 0x00
|
|
#define PIMORONI_TRACKBALL_REG_LED_GRN 0x01
|
|
#define PIMORONI_TRACKBALL_REG_LED_BLU 0x02
|
|
#define PIMORONI_TRACKBALL_REG_LED_WHT 0x03
|
|
#define PIMORONI_TRACKBALL_REG_LEFT 0x04
|
|
#define PIMORONI_TRACKBALL_REG_RIGHT 0x05
|
|
#define PIMORONI_TRACKBALL_REG_UP 0x06
|
|
#define PIMORONI_TRACKBALL_REG_DOWN 0x07
|
|
// clang-format on
|
|
|
|
static uint16_t precision = 128;
|
|
|
|
uint16_t pimoroni_trackball_get_cpi(void) {
|
|
return (precision * 125);
|
|
}
|
|
/**
|
|
* @brief Sets the scaling value for pimoroni trackball
|
|
*
|
|
* Sets a scaling value for pimoroni trackball to allow runtime adjustment. This isn't used by the sensor and is an
|
|
* approximation so the functions are consistent across drivers.
|
|
*
|
|
* NOTE: This rounds down to the nearest number divisable by 125 that's a positive integer, values below 125 are clamped to 125.
|
|
*
|
|
* @param cpi uint16_t
|
|
*/
|
|
void pimoroni_trackball_set_cpi(uint16_t cpi) {
|
|
if (cpi < 249) {
|
|
precision = 1;
|
|
} else {
|
|
precision = (cpi - (cpi % 125)) / 125;
|
|
}
|
|
}
|
|
|
|
void pimoroni_trackball_set_rgbw(uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
|
|
uint8_t data[4] = {r, g, b, w};
|
|
__attribute__((unused)) i2c_status_t status = i2c_writeReg(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LED_RED, data, sizeof(data), PIMORONI_TRACKBALL_TIMEOUT);
|
|
|
|
#ifdef CONSOLE_ENABLE
|
|
if (debug_mouse) dprintf("Trackball RGBW i2c_status_t: %d\n", status);
|
|
#endif
|
|
}
|
|
|
|
i2c_status_t read_pimoroni_trackball(pimoroni_data_t* data) {
|
|
i2c_status_t status = i2c_readReg(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LEFT, (uint8_t*)data, sizeof(*data), PIMORONI_TRACKBALL_TIMEOUT);
|
|
#ifdef CONSOLE_ENABLE
|
|
if (debug_mouse) {
|
|
static uint16_t d_timer;
|
|
if (timer_elapsed(d_timer) > PIMORONI_TRACKBALL_DEBUG_INTERVAL) {
|
|
dprintf("Trackball READ i2c_status_t: %d L: %d R: %d Up: %d D: %d SW: %d\n", status, data->left, data->right, data->up, data->down, data->click);
|
|
d_timer = timer_read();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return status;
|
|
}
|
|
|
|
__attribute__((weak)) void pimoroni_trackball_device_init(void) {
|
|
i2c_init();
|
|
pimoroni_trackball_set_rgbw(0x00, 0x00, 0x00, 0x00);
|
|
}
|
|
|
|
int16_t pimoroni_trackball_get_offsets(uint8_t negative_dir, uint8_t positive_dir, uint8_t scale) {
|
|
uint8_t offset = 0;
|
|
bool isnegative = false;
|
|
if (negative_dir > positive_dir) {
|
|
offset = negative_dir - positive_dir;
|
|
isnegative = true;
|
|
} else {
|
|
offset = positive_dir - negative_dir;
|
|
}
|
|
uint16_t magnitude = (scale * offset * offset * precision) >> 7;
|
|
return isnegative ? -(int16_t)(magnitude) : (int16_t)(magnitude);
|
|
}
|
|
|
|
void pimoroni_trackball_adapt_values(int8_t* mouse, int16_t* offset) {
|
|
if (*offset > 127) {
|
|
*mouse = 127;
|
|
*offset -= 127;
|
|
} else if (*offset < -127) {
|
|
*mouse = -127;
|
|
*offset += 127;
|
|
} else {
|
|
*mouse = *offset;
|
|
*offset = 0;
|
|
}
|
|
}
|