gpio.h (1814B)
1 /* Copyright 2021 QMK 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 3 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #pragma once 17 18 #include <avr/io.h> 19 20 #include "compiler_support.h" 21 #include "pin_defs.h" 22 23 typedef uint8_t pin_t; 24 25 /* Operation of GPIO by pin. */ 26 27 #define gpio_set_pin_input(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin) & 0xF), PORTx_ADDRESS(pin) &= ~_BV((pin) & 0xF)) 28 #define gpio_set_pin_input_high(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin) & 0xF), PORTx_ADDRESS(pin) |= _BV((pin) & 0xF)) 29 #define gpio_set_pin_input_low(pin) STATIC_ASSERT(0, "GPIO pulldowns in input mode are not available on AVR") 30 #define gpio_set_pin_output_push_pull(pin) (DDRx_ADDRESS(pin) |= _BV((pin) & 0xF)) 31 #define gpio_set_pin_output_open_drain(pin) STATIC_ASSERT(0, "Open-drain outputs are not available on AVR") 32 #define gpio_set_pin_output(pin) gpio_set_pin_output_push_pull(pin) 33 34 #define gpio_write_pin_high(pin) (PORTx_ADDRESS(pin) |= _BV((pin) & 0xF)) 35 #define gpio_write_pin_low(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin) & 0xF)) 36 #define gpio_write_pin(pin, level) ((level) ? gpio_write_pin_high(pin) : gpio_write_pin_low(pin)) 37 38 #define gpio_read_pin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin) & 0xF))) 39 40 #define gpio_toggle_pin(pin) (PORTx_ADDRESS(pin) ^= _BV((pin) & 0xF))