blob: facb5144f0024936396a44b0fac78bd525131f3a (
plain)
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
|
/* *****************************************************************************
* 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 <http://www.gnu.org/licenses/>.
*
* Created: 12/18/09 02:35:49
* Copyright (c) 2009 Perry L. Hung. All rights reserved.
*
* ****************************************************************************/
/**
* @file gpio.c
*
* @brief GPIO initialization routine
*/
#include "libmaple.h"
#include "stm32f10x_rcc.h"
#include "gpio.h"
void gpio_init(void) {
/* Turn on clocks for GPIO */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |
RCC_APB2Periph_GPIOB |
RCC_APB2Periph_GPIOC |
RCC_APB2Periph_GPIOD |
RCC_APB2Periph_AFIO,
ENABLE);
}
void gpio_set_mode(GPIO_Port* port, uint8 gpio_pin, uint8 mode) {
uint32_t tmp;
uint32_t shift = POS(gpio_pin % 8);
GPIOReg CR;
ASSERT(port);
ASSERT(gpio_pin < 16);
CR = (gpio_pin < 8) ? &(port->CRL) : &(port->CRH);
tmp = *CR;
tmp &= POS_MASK(shift);
tmp |= mode << shift;
*CR = tmp;
}
|
