keychron_qmk_firmware/keyboards/kapcave/paladin64/config.h

/*
Copyright 2021 KapCave

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

/* Only required if you add in a trackpoint hardware to the pcb */
#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_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 PS2_DRIVER_INTERRUPT
#define PS2_CLOCK_PIN   D2
#define PS2_DATA_PIN    D5

    #define PS2_INT_INIT()  do {    \
        EICRA |= ((1<<ISC21) |      \
                  (0<<ISC20));      \
    } while (0)
    #define PS2_INT_ON()  do {      \
        EIMSK |= (1<<INT2);         \
    } while (0)
    #define PS2_INT_OFF() do {      \
        EIMSK &= ~(1<<INT2);        \
    } while (0)
    #define PS2_INT_VECT   INT2_vect

#endif