Commit | Line | Data |
---|---|---|
23839b8c | 1 | /* Copyright 2016 Wez Furlong |
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 2 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 | */ | |
8485bb34 WF |
16 | #pragma once |
17 | // Some helpers for controlling gpio pins | |
18 | #include <avr/io.h> | |
19 | ||
20 | enum { | |
b624f32f | 21 | PinDirectionInput = 0, |
22 | PinDirectionOutput = 1, | |
23 | PinLevelHigh = 1, | |
24 | PinLevelLow = 0, | |
8485bb34 WF |
25 | }; |
26 | ||
27 | // ex: pinMode(B0, PinDirectionOutput); | |
28 | static inline void pinMode(uint8_t pin, int mode) { | |
b624f32f | 29 | uint8_t bv = _BV(pin & 0xf); |
30 | if (mode == PinDirectionOutput) { | |
31 | _SFR_IO8((pin >> 4) + 1) |= bv; | |
32 | } else { | |
33 | _SFR_IO8((pin >> 4) + 1) &= ~bv; | |
34 | _SFR_IO8((pin >> 4) + 2) &= ~bv; | |
35 | } | |
8485bb34 WF |
36 | } |
37 | ||
38 | // ex: digitalWrite(B0, PinLevelHigh); | |
39 | static inline void digitalWrite(uint8_t pin, int mode) { | |
b624f32f | 40 | uint8_t bv = _BV(pin & 0xf); |
41 | if (mode == PinLevelHigh) { | |
42 | _SFR_IO8((pin >> 4) + 2) |= bv; | |
43 | } else { | |
44 | _SFR_IO8((pin >> 4) + 2) &= ~bv; | |
45 | } | |
8485bb34 WF |
46 | } |
47 | ||
48 | // Return true if the pin is HIGH | |
49 | // digitalRead(B0) | |
b624f32f | 50 | static inline bool digitalRead(uint8_t pin) { return _SFR_IO8(pin >> 4) & _BV(pin & 0xf); } |