-
Notifications
You must be signed in to change notification settings - Fork 11
/
gpio.c
77 lines (65 loc) · 2.86 KB
/
gpio.c
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
/*****************************************************************************
* *
* DFU/SD/SDHC Bootloader for LPC17xx *
* *
* by Triffid Hunter *
* *
* *
* This firmware is Copyright (C) 2009-2010 Michael Moon aka Triffid_Hunter *
* *
* 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, write to the Free Software *
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
* *
*****************************************************************************/
#include "gpio.h"
#include "LPC17xx.h"
#include "lpc17xx_pinsel.h"
#include "lpc17xx_gpio.h"
void GPIO_init(PinName pin) {
GPIO_setup(pin);
}
void GPIO_setup(PinName pin) {
PINSEL_CFG_Type PinCfg;
PinCfg.Funcnum = 0;
PinCfg.OpenDrain = PINSEL_PINMODE_NORMAL;
PinCfg.Pinmode = PINSEL_PINMODE_PULLUP;
PinCfg.Portnum = PORT(pin);
PinCfg.Pinnum = PIN(pin);
PINSEL_ConfigPin(&PinCfg);
}
void GPIO_set_direction(PinName pin, uint8_t direction) {
FIO_SetDir(PORT(pin), 1UL << PIN(pin), direction);
}
void GPIO_output(PinName pin) {
GPIO_set_direction(pin, 1);
}
void GPIO_input(PinName pin) {
GPIO_set_direction(pin, 0);
}
void GPIO_write(PinName pin, uint8_t value) {
GPIO_output(pin);
if (value)
GPIO_set(pin);
else
GPIO_clear(pin);
}
void GPIO_set(PinName pin) {
FIO_SetValue(PORT(pin), 1UL << PIN(pin));
}
void GPIO_clear(PinName pin) {
FIO_ClearValue(PORT(pin), 1UL << PIN(pin));
}
uint8_t GPIO_get(PinName pin) {
return (FIO_ReadValue(PORT(pin)) & (1UL << PIN(pin)))?255:0;
}