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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/************************************************************************/
/* */
/* File: avr/pcint.c */
/* Description: pin change interruption driver. */
/* Version: 1.0 */
/* Author: Otto Mattik */
/* */
/* (C)Copyright Otto Mattik 2014-2021. */
/* */
/* This file is a part of 'armen' (a tiny operating system). */
/* 'armen' is distributed under the CeCILL-V2.1 licence. For more */
/* details about this licence, please visit the website cecill.info */
/* */
/************************************************************************/
#ifndef AVR_GPIO_C
#error "do not use this code directly, it must be included via gpio.c"
#endif
#include "avr/core.h"
#include <avr/interrupt.h>
#if defined(__AVR_ATtiny84__)
#define GPIO_MAX_PCINT 2
#define GPIO_MAX_INT 1
#elif defined(__AVR_ATtiny841__)
#define GPIO_MAX_PCINT 2
#define GPIO_MAX_INT 1
#elif defined(__AVR_ATtiny85__)
#define GPIO_MAX_PCINT 1
#define GPIO_MAX_INT 1
#elif defined(__AVR_ATtiny1634__)
#define GPIO_MAX_PCINT 3
#define GPIO_MAX_INT 1
#elif defined(__AVR_ATmega328P__)
#define GPIO_MAX_PCINT 3
#define GPIO_MAX_INT 2
#elif defined(__AVR_ATmega2560__)
#define GPIO_MAX_PCINT 3
#define GPIO_MAX_INT 3 /* really 8, limited to 3 by events mask */
#endif
static struct {
uint8_t* pcmsk;
uint8_t pcie;
} pcints[GPIO_MAX_PCINT] = {
#if defined(__AVR_ATtiny85__)
{ 0x0015, 1<<PCIE0 }
#elif defined(__AVR_ATtiny84__)\
|| defined(__AVR_ATtiny841__)
{ 0x0032, 1<<PCIE0 },
{ 0x0040, 1<<PCIE1 }
#elif defined(__AVR_ATtiny1634__)
{ 0x0047, 1<<PCIE0 },
{ 0x0048, 1<<PCIE1 },
{ 0x0049, 1<<PCIE2 }
#elif defined(__AVR_ATmega328P__)\
|| defined(__AVR_ATmega2560__)
{ 0x006B, 1<<PCIE0 },
{ 0x006C, 1<<PCIE1 },
{ 0x006D, 1<<PCIE2 }
#endif
};
/*
* interrupt vectors
*/
ISR( INT0_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
#ifdef GIMSK
if( (MCUCR & 0x03) == INT_LOW )
GIMSK &= ~(1 << INT0);
#else
if( (EICRA & 0x03) == INT_LOW )
EIMSK &= ~1;
#endif
_wakeup( EVENT_INT0, 0 );
_enable_intr( iflag );
}
#if (GPIO_MAX_INT >= 2)
ISR( INT1_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
if( (EICRA & 0x0C) == INT_LOW )
EIMSK &= ~2;
_wakeup( EVENT_INT1, 0 );
_enable_intr( iflag );
}
#endif
#if (GPIO_MAX_INT == 3)
ISR( INT2_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
if( (EICRA & 0x30) == INT_LOW )
EIMSK &= ~4;
_wakeup( EVENT_INT2, 0 );
_enable_intr( iflag );
}
#endif
ISR( PCINT0_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
_wakeup( EVENT_PCINT0, 0 );
_enable_intr( iflag );
}
#ifndef PCINT_PER_PORT
#if (GPIO_MAX_PCINT >= 2)
ISR( PCINT1_vect, ISR_ALIASOF( PCINT0_vect ) );
#endif
#if (GPIO_MAX_PCINT == 3)
ISR( PCINT2_vect, ISR_ALIASOF( PCINT0_vect ) );
#endif
#else
#if (GPIO_MAX_PCINT >= 2)
ISR( PCINT1_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
_wakeup( EVENT_PCINT1, 0 );
_enable_intr( iflag );
}
#endif
#if (GPIO_MAX_PCINT == 3)
ISR( PCINT2_vect )
{
register uint8_t iflag;
iflag = _disable_intr( );
_wakeup( EVENT_PCINT2, 0 );
_enable_intr( iflag );
}
#endif
#endif
/*
* enable/disable interrupt on gpio pin change
*
* input:
* interrupt interrupt number (0, 1, 2)
* mode interrupt mode (LOW, CHANGE, RISING, FALLING, DISABLE)
*/
void gpio_int_enable( uint8_t interrupt, uint8_t mode )
{
#ifdef CHECK_PARAM
if( interrupt < GPIO_MAX_INT && mode <= INT_DISABLE )
#endif
{
if( mode == INT_DISABLE )
/*
#if defined(__AVR_ATtiny84__)\
|| defined(__AVR_ATtiny85__)\
|| defined(__AVR_ATtiny841__)\
|| defined(__AVR_ATtiny1634__)
*/
#ifdef GIMSK
GIMSK &= ~(1 << INT0);
else
{
MCUCR |= mode;
GIMSK |= (1 << INT0);
}
#else
EIMSK &= ~(1 << interrupt);
else
{
#if 0
#if defined(__AVR_ATmega2560__)
if( interrupt >= 4 )
EICRB |= (mode << (interrupt-4));
else
#endif
#endif
EICRA |= (mode << interrupt);
EIMSK |= (1 << interrupt);
}
#endif
}
}
/*
* enable/disable interrupt on gpio pin change
*
* input:
* gpio gpio pin
* enable true or false
*/
void gpio_pcint_enable( uint8_t gpio, uint8_t enable )
{
#ifdef CHECK_PARAM
if( gpio < (GPIO_MAX_PORT << 3) )
#endif
{
#if defined(__AVR_ATtiny1634__)
if( gpio > 11 )
gpio += 4;
if( gpio < 22 )
#elif defined(__AVR_ATmega328P__)
if( gpio != 15 )
#elif defined(__AVR_ATmega2560__)
if( gpio >= 8 && gpio <= 15 )
gpio -= 8;
else if( gpio == 32 )
gpio = 8;
else if( gpio >= 64 && gpio <= 70 )
gpio -= 55;
else if( gpio >= 72 && gpio <= 79 )
gpio -= 56;
else
return;
#endif
{
uint8_t port = gpio >> 3;
uint8_t mask = 1 << (gpio & 7);
if( enable != 0 )
{
*pcints[port].pcmsk |= mask;
/*
#if defined(__AVR_ATtiny84__)\
|| defined(__AVR_ATtiny85__)\
|| defined(__AVR_ATtiny841__)\
|| defined(__AVR_ATtiny1634__)
*/
#ifdef GIMSK
GIMSK |= pcints[port].pcie;
#else
PCICR |= pcints[port].pcie;
#endif
}
else
*pcints[port].pcmsk &= ~mask;
}
}
}
|
