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
|
/**
* @file gpio.c
* Abstracts gpio access, makes things easier
*
* 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/>.
*/
#include <gpio.h>
void gpio_init(void)
{
// enable clocks
RCC->AHB2ENR |= 0x0F;
}
void gpio_pupd(GPIO_TypeDef *port, uint32_t pin, uint32_t pupd)
{
port->PUPDR &= ~(0x03 << (2 * pin));
port->PUPDR |= pupd << (2 * pin);
}
void gpio_speed(GPIO_TypeDef *port, uint32_t pin, uint32_t speed)
{
port->OSPEEDR &= ~(0x03 << (2 * pin));
port->OSPEEDR |= speed << (2 * pin);
}
void gpio_type(GPIO_TypeDef *port, uint32_t pin, uint32_t type)
{
port->OTYPER &= ~(1 << pin);
port->OTYPER |= type << pin;
}
void gpio_mode(GPIO_TypeDef *port, uint32_t pin, uint32_t mode)
{
port->MODER &= ~(0x03 << (2 * pin));
port->MODER |= mode << (2 * pin);
}
void gpio_dout(GPIO_TypeDef *port, uint32_t pin, uint32_t val)
{
port->BSRR |= (1 << (val ? pin : pin + 16));
}
uint32_t gpio_din(GPIO_TypeDef *port, uint32_t pin)
{
return port->IDR & (1 << pin);
}
|
