1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/**
* @file gpio.h
* Userspace library for GPIO access
*
* Copyright (C) 2018 Clyne Sullivan
*
* 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 3 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 <https://www.gnu.org/licenses/>.
*/
#ifndef STMOS_GPIO_H_
#define STMOS_GPIO_H_
#define GP(a) ((a - 'A') << 4)
/**
* Defines possible modes for a gpio pin.
*/
enum GPIO_MODE
{
INPUT = 0, /**< digital input */
OUTPUT, /**< digital output */
ALTERNATE, /**< alternate function */
ANALOG /**< analog function */
};
/**
* Defines whether to use push-pull or open drain.
*/
enum GPIO_TYPE
{
PUSHPULL = 0, /**< push-pull */
OPENDRAIN /**< open drain */
};
/**
* Defines the pin's speed
*/
enum GPIO_SPEED
{
LOW = 0, /**< low */
MEDIUM, /**< medium */
HIGH, /**< high */
VERYHIGH /**< very high/maximum */
};
/**
* Defines if a pullup or pulldown should be used.
*/
enum GPIO_PUPD
{
NOPUPD, /**< no pullup/pulldown */
PULLUP, /**< use pullup */
PULLDOWN /**< use pulldown */
};
typedef unsigned int gpio_pin_t;
void gpioMode(gpio_pin_t pin, int mode);
void gpioType(gpio_pin_t pin, int type);
void gpioPuPd(gpio_pin_t pin, int pupd);
void gpioSpeed(gpio_pin_t pin, int speed);
void gpioWrite(gpio_pin_t pin, int value);
int gpioRead(gpio_pin_t pin);
#endif // STMOS_GPIO_H_
|
