-
Notifications
You must be signed in to change notification settings - Fork 1
/
endstop_interrupts.h
206 lines (182 loc) · 8.68 KB
/
endstop_interrupts.h
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
/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* 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/>.
*
*/
/**
* Endstop Interrupts
*
* Without endstop interrupts the endstop pins must be polled continually in
* the stepper-ISR via endstops.update(), most of the time finding no change.
* With this feature endstops.update() is called only when we know that at
* least one endstop has changed state, saving valuable CPU cycles.
*
* This feature only works when all used endstop pins can generate either an
* 'external interrupt' or a 'pin change interrupt'.
*
* Test whether pins issue interrupts on your board by flashing 'pin_interrupt_test.ino'.
* (Located in Marlin/buildroot/share/pin_interrupt_test/pin_interrupt_test.ino)
*/
#ifndef _ENDSTOP_INTERRUPTS_H_
#define _ENDSTOP_INTERRUPTS_H_
#include "macros.h"
/**
* Patch for pins_arduino.h (...\Arduino\hardware\arduino\avr\variants\mega\pins_arduino.h)
*
* These macros for the Arduino MEGA do not include the two connected pins on Port J (D13, D14).
* So we extend them here because these are the normal pins for Y_MIN and Y_MAX on RAMPS.
* There are more PCI-enabled processor pins on Port J, but they are not connected to Arduino MEGA.
*/
#if defined(ARDUINO_AVR_MEGA2560) || defined(ARDUINO_AVR_MEGA)
#undef digitalPinToPCICR
#define digitalPinToPCICR(p) ( WITHIN(p, 10, 15) || \
WITHIN(p, 50, 53) || \
WITHIN(p, 62, 69) ? &PCICR : (uint8_t*)0 )
#undef digitalPinToPCICRbit
#define digitalPinToPCICRbit(p) ( WITHIN(p, 10, 13) || WITHIN(p, 50, 53) ? 0 : \
WITHIN(p, 14, 15) ? 1 : \
WITHIN(p, 62, 69) ? 2 : \
0 )
#undef digitalPinToPCMSK
#define digitalPinToPCMSK(p) ( WITHIN(p, 10, 13) || WITHIN(p, 50, 53) ? &PCMSK0 : \
WITHIN(p, 14, 15) ? &PCMSK1 : \
WITHIN(p, 62, 69) ? &PCMSK2 : \
(uint8_t *)0 )
#undef digitalPinToPCMSKbit
#define digitalPinToPCMSKbit(p) ( WITHIN(p, 10, 13) ? ((p) - 6) : \
(p) == 14 || (p) == 51 ? 2 : \
(p) == 15 || (p) == 52 ? 1 : \
(p) == 50 ? 3 : \
(p) == 53 ? 0 : \
WITHIN(p, 62, 69) ? ((p) - 62) : \
0 )
#endif
volatile uint8_t e_hit = 0; // Different from 0 when the endstops should be tested in detail.
// Must be reset to 0 by the test function when finished.
// Install Pin change interrupt for a pin. Can be called multiple times.
void pciSetup(byte pin) {
SBI(*digitalPinToPCMSK(pin), digitalPinToPCMSKbit(pin)); // enable pin
SBI(PCIFR, digitalPinToPCICRbit(pin)); // clear any outstanding interrupt
SBI(PCICR, digitalPinToPCICRbit(pin)); // enable interrupt for the group
}
// This is what is really done inside the interrupts.
FORCE_INLINE void endstop_ISR_worker( void ) {
e_hit = 2; // Because the detection of a e-stop hit has a 1 step debouncer it has to be called at least twice.
}
// Use one Routine to handle each group
// One ISR for all EXT-Interrupts
void endstop_ISR(void) { endstop_ISR_worker(); }
// Handlers for pin change interrupts
#ifdef PCINT0_vect
ISR(PCINT0_vect) { endstop_ISR_worker(); }
#endif
#ifdef PCINT1_vect
ISR(PCINT1_vect) { endstop_ISR_worker(); }
#endif
#ifdef PCINT2_vect
ISR(PCINT2_vect) { endstop_ISR_worker(); }
#endif
#ifdef PCINT3_vect
ISR(PCINT3_vect) { endstop_ISR_worker(); }
#endif
void setup_endstop_interrupts( void ) {
#if HAS_X_MAX
#if (digitalPinToInterrupt(X_MAX_PIN) != NOT_AN_INTERRUPT) // if pin has an external interrupt
attachInterrupt(digitalPinToInterrupt(X_MAX_PIN), endstop_ISR, CHANGE); // assign it
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(X_MAX_PIN) != NULL, "X_MAX_PIN is not interrupt-capable"); // if pin has no pin change interrupt - error
pciSetup(X_MAX_PIN); // assign it
#endif
#endif
#if HAS_X_MIN
#if (digitalPinToInterrupt(X_MIN_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(X_MIN_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(X_MIN_PIN) != NULL, "X_MIN_PIN is not interrupt-capable");
pciSetup(X_MIN_PIN);
#endif
#endif
#if HAS_Y_MAX
#if (digitalPinToInterrupt(Y_MAX_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Y_MAX_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Y_MAX_PIN) != NULL, "Y_MAX_PIN is not interrupt-capable");
pciSetup(Y_MAX_PIN);
#endif
#endif
#if HAS_Y_MIN
#if (digitalPinToInterrupt(Y_MIN_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Y_MIN_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Y_MIN_PIN) != NULL, "Y_MIN_PIN is not interrupt-capable");
pciSetup(Y_MIN_PIN);
#endif
#endif
#if HAS_Z_MAX
#if (digitalPinToInterrupt(Z_MAX_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Z_MAX_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Z_MAX_PIN) != NULL, "Z_MAX_PIN is not interrupt-capable");
pciSetup(Z_MAX_PIN);
#endif
#endif
#if HAS_Z_MIN
#if (digitalPinToInterrupt(Z_MIN_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Z_MIN_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Z_MIN_PIN) != NULL, "Z_MIN_PIN is not interrupt-capable");
pciSetup(Z_MIN_PIN);
#endif
#endif
#if HAS_Z2_MAX
#if (digitalPinToInterrupt(Z2_MAX_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Z2_MAX_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Z2_MAX_PIN) != NULL, "Z2_MAX_PIN is not interrupt-capable");
pciSetup(Z2_MAX_PIN);
#endif
#endif
#if HAS_Z2_MIN
#if (digitalPinToInterrupt(Z2_MIN_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Z2_MIN_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Z2_MIN_PIN) != NULL, "Z2_MIN_PIN is not interrupt-capable");
pciSetup(Z2_MIN_PIN);
#endif
#endif
#if HAS_Z_MIN_PROBE_PIN
#if (digitalPinToInterrupt(Z_MIN_PROBE_PIN) != NOT_AN_INTERRUPT)
attachInterrupt(digitalPinToInterrupt(Z_MIN_PROBE_PIN), endstop_ISR, CHANGE);
#else
// Not all used endstop/probe -pins can raise interrupts. Please deactivate ENDSTOP_INTERRUPTS or change the pin configuration!
static_assert(digitalPinToPCICR(Z_MIN_PROBE_PIN) != NULL, "Z_MIN_PROBE_PIN is not interrupt-capable");
pciSetup(Z_MIN_PROBE_PIN);
#endif
#endif
// If we arrive here without raising an assertion, each pin has either an EXT-interrupt or a PCI.
}
#endif // _ENDSTOP_INTERRUPTS_H_