mirror of
https://github.com/qmk/qmk_firmware
synced 2024-11-18 01:46:09 +00:00
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright 2016 Wez Furlong
|
|
*
|
|
* 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
|
|
// Some helpers for controlling gpio pins
|
|
#include <avr/io.h>
|
|
|
|
enum {
|
|
PinDirectionInput = 0,
|
|
PinDirectionOutput = 1,
|
|
PinLevelHigh = 1,
|
|
PinLevelLow = 0,
|
|
};
|
|
|
|
// ex: pinMode(B0, PinDirectionOutput);
|
|
static inline void pinMode(uint8_t pin, int mode) {
|
|
uint8_t bv = _BV(pin & 0xf);
|
|
if (mode == PinDirectionOutput) {
|
|
_SFR_IO8((pin >> 4) + 1) |= bv;
|
|
} else {
|
|
_SFR_IO8((pin >> 4) + 1) &= ~bv;
|
|
_SFR_IO8((pin >> 4) + 2) &= ~bv;
|
|
}
|
|
}
|
|
|
|
// ex: digitalWrite(B0, PinLevelHigh);
|
|
static inline void digitalWrite(uint8_t pin, int mode) {
|
|
uint8_t bv = _BV(pin & 0xf);
|
|
if (mode == PinLevelHigh) {
|
|
_SFR_IO8((pin >> 4) + 2) |= bv;
|
|
} else {
|
|
_SFR_IO8((pin >> 4) + 2) &= ~bv;
|
|
}
|
|
}
|
|
|
|
// Return true if the pin is HIGH
|
|
// digitalRead(B0)
|
|
static inline bool digitalRead(uint8_t pin) { return _SFR_IO8(pin >> 4) & _BV(pin & 0xf); }
|