To get this branch, use:
bzr branch
http://bzr.ed.am/elec/propeller-clock
« back to all changes in this revision
Viewing changes to src/propeller-clock.cc
- browse files at revision 90
- compare with another revision
- download diff
- download tarball
- view history from revision 90
- Committer: Tim Marston
- Date: 2012-05-18 18:29:50 UTC
- Revision ID: tim@ed.am-20120518182950-t85bn9a21n72uzm8
text messages are now individually enabled and draw()n automatically
- files added:
- arduino.mk
- src/modes
- test/fan-test/Makefile
- test/phantom-button-presses
- test/phantom-button-presses/Makefile
- test/rtc-test
- test/rtc-test/Makefile
- test/rtc-test/util
- files removed:
- src/util/Bounce.cpp
- files renamed:
- src/propeller-clock.ino => src/propeller-clock.cc
- files modified:
- .bzrignore
- test/led-test/Makefile
added
removed
src/propeller-clock.cc
1
/* -*- mode: c++; compile-command: "make"; -*- */
1
2
/*
2
3
* propeller-clock.ino
3
4
*
27
28
28
29
* a PC fan is wired up to a 12V power supply
29
30
30
* the fan's SENSE (tachiometer) pin connected to pin 2 on the
31
arduino.
31
* the fan's SENSE (tachometer) pin connected to pin 2 on the
32
Arduino.
32
33
33
* the pins 4 to 13 on the arduino should directly drive an LED (the
34
* the pins 4 to 13 on the Arduino should directly drive an LED (the
34
35
LED on pin 4 is in the centre of the clock face and the LED on pin
35
36
13 is at the outside.
36
37
37
38
* if a longer hand (and a larger clock face) is desired, pin 4 can be
38
39
used to indirectly drive a transistor which in turn drives several
39
LEDs that turn on anf off in unison in the centre of the clock.
40
LEDs that turn on and off in unison in the centre of the clock.
40
41
41
42
* a button should be attached to pin 3 that grounds it when pressed.
42
43
43
* A DS1307 remote clock is connected via I2C on analog pins 4 and 5.
44
* A DS1307 remote clock is connected via I2C on analogue pins 4 and 5.
44
45
45
46
Implementation details:
46
47
49
50
* the timing of the drawing of the clock face is recalculated with
50
51
every rotation of the propeller.
51
52
52
* a PC fan actually sends 2 tachiometer pulses per revolution, so the
53
* a PC fan actually sends 2 tachometer pulses per revolution, so the
53
54
software skips every other one. This means that the clock may
54
55
appear upside-down if started with the propeller in the wrong
55
position. You will need to experiment to dicsover the position that
56
position. You will need to experiment to discover the position that
56
57
the propeller must be in when starting the clock.
57
58
58
59
Usage instructions:
74
75
75
76
******************************************************************************/
76
77
77
78
#include <Bounce.h>
79
#include <DS1307.h>
80
#include <Wire.h>
78
#include "config.h"
79
#include "button.h"
80
#include "time.h"
81
#include "Arduino.h"
82
#include "modes/switcher_major_mode.h"
83
#include "modes/settings_major_mode.h"
84
#include "modes/analogue_clock_mode.h"
85
#include "modes/digital_clock_mode.h"
86
#include "modes/info_mode.h"
87
#include "modes/test_pattern_mode.h"
88
#include "text.h"
89
#include "text_renderer.h"
90
#include "common.h"
81
91
82
92
//_____________________________________________________________________________
83
93
// data
84
94
85
86
95
// when non-zero, the time (in microseconds) of a new fan pulse that
87
96
// has just occurred, which means that segment drawing needs to be
88
97
// restarted
89
static unsigned long new_pulse_at = 0;
98
static unsigned long _new_pulse_at = 0;
90
99
91
100
// the time (in microseconds) when the last fan pulse occurred
92
static unsigned long last_pulse_at = 0;
101
static unsigned long _last_pulse_at = 0;
93
102
94
103
// duration (in microseconds) that a segment should be displayed
95
static unsigned long segment_step = 0;
104
static unsigned long _segment_step = 0;
96
105
97
106
// remainder after divisor and a tally of the remainders for each segment
98
static unsigned long segment_step_sub_step = 0;
99
static unsigned long segment_step_sub = 0;
100
101
// flag to indicate that the drawing mode should be cycled to the next one
102
static bool inc_draw_mode = false;
103
104
// a bounce-managed button
105
static Bounce button( 3, 5 );
106
107
// the time
108
static int time_hours = 0;
109
static int time_minutes = 0;
110
static int time_seconds = 0;
111
112
// number of segments in a full display (rotation) is 60 (one per
113
// second) times the desired number of sub-divisions of a second
114
#define NUM_SECOND_SEGMENTS 5
115
#define NUM_SEGMENTS ( 60 * NUM_SECOND_SEGMENTS )
107
static unsigned long _segment_step_sub_step = 0;
108
static unsigned long _segment_step_sub = 0;
109
110
// the button
111
static Button _button( 3 );
112
113
// major modes
114
static MajorMode *_modes[ 3 ];
115
116
// current major mode
117
static int _mode = 0;
116
118
117
119
//_____________________________________________________________________________
118
120
// code
119
121
120
121
// check for button presses
122
void checkButtons()
123
{
124
// update buttons
125
button.update();
126
127
// notice button presses
128
if( button.risingEdge() )
129
inc_draw_mode = true;
130
}
131
132
133
// keep track of time
134
void trackTime()
135
{
136
// previous time and any carried-over milliseconds
137
static unsigned long last_time = millis();
138
static unsigned long carry = 0;
139
140
// how many milliseonds have elapsed since we last checked?
141
unsigned long next_time = millis();
142
unsigned long delta = next_time - last_time + carry;
143
144
// update the previous time and carried-over milliseconds
145
last_time = next_time;
146
carry = delta % 1000;
147
148
// add the seconds that have passed to the time
149
time_seconds += delta / 1000;
150
while( time_seconds >= 60 ) {
151
time_seconds -= 60;
152
time_minutes++;
153
if( time_minutes >= 60 ) {
154
time_minutes -= 60;
155
time_hours++;
156
if( time_hours >= 24 )
157
time_hours -= 24;
122
// perform button events
123
void do_button_events()
124
{
125
// loop through pending events
126
while( int event = _button.get_event() )
127
{
128
switch( event )
129
{
130
case 1:
131
// short press
132
_modes[ _mode ]->press();
133
break;
134
case 2:
135
// long press
136
_modes[ _mode ]->long_press();
137
break;
138
case 3:
139
// looooong press (change major mode)
140
_modes[ _mode ]->deactivate();
141
if( !_modes[ ++_mode ] ) _mode = 0;
142
_modes[ _mode ]->activate();
143
break;
158
144
}
159
145
}
160
146
}
161
147
162
148
163
// draw a segment for the test display
164
void drawNextSegment_test( bool reset )
149
// draw a display segment
150
void draw_next_segment( bool reset )
165
151
{
166
152
// keep track of segment
167
static unsigned int segment = 0;
168
if( reset ) segment = 0;
169
segment++;
170
171
// turn on inside and outside LEDs
172
digitalWrite( 4, HIGH );
173
digitalWrite( 13, HIGH );
174
175
// display segment number in binary across in the inside LEDs,
176
// with the LED on pin 12 showing the least-significant bit
177
for( int a = 0; a < 8; a++ )
178
digitalWrite( 12 - a, ( ( segment >> a ) & 1 )? HIGH : LOW );
179
}
180
181
182
// draw a segment for the time display
183
void drawNextSegment_time( bool reset )
184
{
185
static unsigned int second = 0;
186
static unsigned int segment = 0;
187
188
// handle display reset
189
if( reset ) {
190
second = 0;
191
segment = 0;
192
}
193
194
// what needs to be drawn?
195
bool draw_tick = !segment && second % 5 == 0;
196
bool draw_second = !segment && second == time_seconds;
197
bool draw_minute = !segment && second == time_minutes;
198
bool draw_hour = !segment && second == time_hours;
199
200
// set the LEDs
201
digitalWrite( 13, HIGH );
202
digitalWrite( 12, draw_tick || draw_minute );
203
for( int a = 10; a <= 11; a++ )
204
digitalWrite( a, draw_minute || draw_second );
205
for( int a = 4; a <= 9; a++ )
206
digitalWrite( 10, draw_minute | draw_second || draw_hour );
207
208
// inc position
209
if( ++segment >= NUM_SECOND_SEGMENTS ) {
210
segment = 0;
211
second++;
212
}
213
}
214
215
216
// draw a display segment
217
void drawNextSegment( bool reset )
218
{
219
static int draw_mode = 0;
220
221
// handle mode switch requests
222
if( reset && inc_draw_mode ) {
223
inc_draw_mode = false;
224
draw_mode++;
225
if( draw_mode >= 2 )
226
draw_mode = 0;
227
}
228
229
// draw the segment
230
switch( draw_mode ) {
231
case 0: drawNextSegment_test( reset ); break;
232
case 1: drawNextSegment_time( reset ); break;
233
}
153
#if CLOCK_FORWARD
154
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
155
if( reset ) segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
156
#else
157
static int segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
158
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
159
#endif
160
161
// reset the text renderer's buffer
162
TextRenderer::reset_buffer();
163
164
if( reset )
165
{
166
_modes[ _mode ]->draw_reset();
167
168
// tell the text services we're starting a new frame
169
Text::draw_reset();
170
}
171
172
// draw
173
_modes[ _mode ]->draw( segment );
174
175
// draw text
176
Text::draw( segment );
177
178
// draw text rednerer's buffer
179
TextRenderer::output_buffer();
180
181
#if CLOCK_FORWARD
182
if( ++segment >= NUM_SEGMENTS ) segment = 0;
183
#else
184
if( --segment < 0 ) segment = NUM_SEGMENTS - 1;
185
#endif
234
186
}
235
187
236
188
237
189
// calculate time constants when a new pulse has occurred
238
void calculateSegmentTimes()
190
void calculate_segment_times()
239
191
{
240
192
// check for overflows, and only recalculate times if there isn't
241
193
// one (if there is, we'll just go with the last pulse's times)
242
if( new_pulse_at > last_pulse_at )
194
if( _new_pulse_at > _last_pulse_at )
243
195
{
244
196
// new segment stepping times
245
unsigned long delta = new_pulse_at - last_pulse_at;
246
segment_step = delta / NUM_SEGMENTS;
247
segment_step_sub = 0;
248
segment_step_sub_step = delta % NUM_SEGMENTS;
197
unsigned long delta = _new_pulse_at - _last_pulse_at;
198
_segment_step = delta / NUM_SEGMENTS;
199
_segment_step_sub = 0;
200
_segment_step_sub_step = delta % NUM_SEGMENTS;
249
201
}
250
202
251
203
// now we have dealt with this pulse, save the pulse time and
252
204
// clear new_pulse_at, ready for the next pulse
253
last_pulse_at = new_pulse_at;
254
new_pulse_at = 0;
205
_last_pulse_at = _new_pulse_at;
206
_new_pulse_at = 0;
255
207
}
256
208
257
209
258
210
// wait until it is time to draw the next segment or a new pulse has
259
211
// occurred
260
void waitTillNextSegment( bool reset )
212
void wait_till_end_of_segment( bool reset )
261
213
{
262
214
static unsigned long end_time = 0;
263
215
264
216
// handle reset
265
217
if( reset )
266
end_time = last_pulse_at;
218
end_time = _last_pulse_at;
267
219
268
220
// work out the time that this segment should be displayed until
269
end_time += segment_step;
270
segment_step_sub += segment_step_sub_step;
271
if( segment_step_sub >= NUM_SEGMENTS ) {
272
segment_step_sub -= NUM_SEGMENTS;
221
end_time += _segment_step;
222
_segment_step_sub += _segment_step_sub_step;
223
if( _segment_step_sub >= NUM_SEGMENTS ) {
224
_segment_step_sub -= NUM_SEGMENTS;
273
225
end_time++;
274
226
}
275
227
276
228
// wait
277
while( micros() < end_time && !new_pulse_at );
229
while( micros() < end_time && !_new_pulse_at );
278
230
}
279
231
280
232
281
// ISR to handle the pulses from the fan's tachiometer
282
void fanPulseHandler()
233
// ISR to handle the pulses from the fan's tachometer
234
void fan_pulse_handler()
283
235
{
284
236
// the fan actually sends two pulses per revolution. These pulses
285
237
// may not be exactly evenly distributed around the rotation, so
290
242
if( !ignore )
291
243
{
292
244
// set a new pulse time
293
new_pulse_at = micros();
245
_new_pulse_at = micros();
294
246
}
295
247
}
296
248
298
250
// main setup
299
251
void setup()
300
252
{
301
// set up an interrupt handler on pin 2 to nitice fan pulses
302
attachInterrupt( 0, fanPulseHandler, RISING );
253
// set up an interrupt handler on pin 2 to notice fan pulses
254
attachInterrupt( 0, fan_pulse_handler, RISING );
303
255
digitalWrite( 2, HIGH );
304
256
305
257
// set up output pins (4 to 13) for the led array
308
260
309
261
// set up mode-switch button on pin 3
310
262
pinMode( 3, INPUT );
311
312
// get the time from the real-time clock
313
int rtc_data[ 7 ];
314
RTC.get( rtc_data, true );
315
time_hours = rtc_data[ DS1307_HR ];
316
time_minutes = rtc_data[ DS1307_MIN ];
317
time_seconds = rtc_data[ DS1307_SEC ];
318
319
// serial comms
320
Serial.begin( 9600 );
263
digitalWrite( 3, HIGH );
264
static int event_times[] = { 5, 500, 4000, 0 };
265
_button.set_event_times( event_times );
266
267
// initialise RTC
268
// Time::load_time();
269
270
// init text renderer
271
TextRenderer::init();
272
273
// reset text
274
Text::reset();
275
leds_off();
276
277
static SwitcherMajorMode switcher;
278
static SettingsMajorMode settings( _button );
279
280
// add major modes
281
int mode = 0;
282
_modes[ mode++ ] = &switcher;
283
_modes[ mode++ ] = &settings;
284
_modes[ mode ] = 0;
285
286
// activate the current major mode
287
_modes[ _mode ]->activate();
321
288
}
322
289
323
290
325
292
void loop()
326
293
{
327
294
// if there has been a new pulse, we'll be resetting the display
328
bool reset = new_pulse_at? true : false;
295
bool reset = _new_pulse_at? true : false;
296
297
// update button
298
_button.update();
329
299
330
300
// only do this stuff at the start of a display cycle, to ensure
331
301
// that no state changes mid-display
332
302
if( reset )
333
303
{
334
// check buttons
335
checkButtons();
304
// calculate segment times
305
calculate_segment_times();
336
306
337
307
// keep track of time
338
trackTime();
308
Time::update();
309
310
// perform button events
311
do_button_events();
339
312
}
340
313
341
314
// draw this segment
342
drawNextSegment( reset );
343
344
// do we need to recalculate segment times?
345
if( reset )
346
calculateSegmentTimes();
315
draw_next_segment( reset );
347
316
348
317
// wait till it's time to draw the next segment
349
waitTillNextSegment( reset );
318
wait_till_end_of_segment( reset );
350
319
}
Loggerhead is a web-based interface for Bazaar branches
Version: 1.18.2, Revision: 480