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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/*
* Arduino-compatible digital I/O implementation.
*/
#include "wirish.h"
#include "io.h"
void pinMode(uint8 pin, WiringPinMode mode) {
gpio_pin_mode outputMode;
boolean pwm = false;
if (pin >= BOARD_NR_GPIO_PINS) {
return;
}
switch(mode) {
case OUTPUT:
outputMode = GPIO_OUTPUT_PP;
break;
case OUTPUT_OPEN_DRAIN:
outputMode = GPIO_OUTPUT_OD;
break;
case INPUT:
case INPUT_FLOATING:
outputMode = GPIO_INPUT_FLOATING;
break;
case INPUT_ANALOG:
outputMode = GPIO_INPUT_ANALOG;
break;
case INPUT_PULLUP:
outputMode = GPIO_INPUT_PU;
break;
case INPUT_PULLDOWN:
outputMode = GPIO_INPUT_PD;
break;
case PWM:
outputMode = GPIO_AF_OUTPUT_PP;
pwm = true;
break;
case PWM_OPEN_DRAIN:
outputMode = GPIO_AF_OUTPUT_OD;
pwm = true;
break;
default:
ASSERT(0);
return;
}
gpio_set_mode(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, outputMode);
if (PIN_MAP[pin].timer_device != NULL) {
/* Enable/disable timer channels if we're switching into or
* out of PWM. */
timer_set_mode(PIN_MAP[pin].timer_device,
PIN_MAP[pin].timer_channel,
pwm ? TIMER_PWM : TIMER_DISABLED);
}
}
uint32 digitalRead(uint8 pin) {
if (pin >= BOARD_NR_GPIO_PINS) {
return 0;
}
return gpio_read_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit) ?
HIGH : LOW;
}
void digitalWrite(uint8 pin, uint8 val) {
if (pin >= BOARD_NR_GPIO_PINS) {
return;
}
gpio_write_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, val);
}
void togglePin(uint8 pin) {
if (pin >= BOARD_NR_GPIO_PINS) {
return;
}
gpio_toggle_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit);
}
#define BUTTON_DEBOUNCE_DELAY 1
uint8 isButtonPressed() {
if (digitalRead(BOARD_BUTTON_PIN)) {
delay(BUTTON_DEBOUNCE_DELAY);
while (digitalRead(BOARD_BUTTON_PIN))
;
return true;
}
return false;
}
uint8 waitForButtonPress(uint32 timeout) {
uint32 start = millis();
uint32 time;
if (timeout == 0) {
while (!isButtonPressed())
;
return true;
}
do {
time = millis();
/* properly handle wrap-around */
if ((start > time && time + (0xffffffffU - start) > timeout) ||
time - start > timeout) {
return false;
}
} while (!isButtonPressed());
return true;
}
|
