qmk_firmware/keyboards/pierce/keymaps/durken1/config.h

/* Copyright 2022 durken (https://github.com/durken1/)
 *
 * 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

// default but important
#define TAPPING_TERM 220

// Prevent normal rollover on alphas from accidentally triggering mods.
#define IGNORE_MOD_TAP_INTERRUPT

// Enable rapid switch from tap to hold, disables double tap hold auto-repeat.
#define TAPPING_FORCE_HOLD

#define PERMISSIVE_HOLD

// Combo settings
#define COMBO_COUNT 3
#define COMBO_TERM 35

#ifdef PS2_DRIVER_USART
#define PS2_CLOCK_PIN   D5
#define PS2_DATA_PIN    D2

/* synchronous, odd parity, 1-bit stop, 8-bit data, sample at falling edge */
/* set DDR of CLOCK as input to be slave */
#define PS2_MOUSE_ROTATE 270 // compensate for east-facing device orientation
#define PS2_USART_INIT() do {   \
    PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);   \
    PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);     \
    UCSR1C = ((1 << UMSEL10) |  \
            (3 << UPM10)   |  \
            (0 << USBS1)   |  \
            (3 << UCSZ10)  |  \
            (0 << UCPOL1));   \
    UCSR1A = 0;                 \
    UBRR1H = 0;                 \
    UBRR1L = 0;                 \
} while (0)
#define PS2_USART_RX_INT_ON() do {  \
    UCSR1B = ((1 << RXCIE1) |       \
            (1 << RXEN1));        \
} while (0)
#define PS2_USART_RX_POLL_ON() do { \
    UCSR1B = (1 << RXEN1);          \
} while (0)
#define PS2_USART_OFF() do {    \
    UCSR1C = 0;                 \
    UCSR1B &= ~((1 << RXEN1) |  \
            (1 << TXEN1));  \
} while (0)
#define PS2_USART_RX_READY      (UCSR1A & (1<<RXC1))
#define PS2_USART_RX_DATA       UDR1
#define PS2_USART_ERROR         (UCSR1A & ((1<<FE1) | (1<<DOR1) | (1<<UPE1)))
#define PS2_USART_RX_VECT       USART1_RX_vect
#endif

#ifdef AUTO_BUTTONS
  #define AUTO_BUTTONS_TIMEOUT 750
#endif