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.ino
- browse files at revision 52
- compare with another revision
- download diff
- download tarball
- view history from revision 52
- Committer: edam
- Date: 2012-02-23 00:25:51 UTC
- Revision ID: edam@waxworlds.org-20120223002551-2w9smk384ztzpwo7
added resistor on the PNP arduino pin
- files added:
- src/util/Bounce.cpp
- files removed:
- src/TODO
- src/modes
- test/rtc-test
- test/rtc-test/Makefile
- test/rtc-test/util
- files renamed:
- src/propeller-clock.cc => src/propeller-clock.ino
- files modified:
- .bzrignore
- src/Makefile
added
removed
src/propeller-clock.ino
28
28
29
29
* a PC fan is wired up to a 12V power supply
30
30
31
* the fan's SENSE (tachometer) pin connected to pin 2 on the
32
Arduino.
31
* the fan's SENSE (tachiometer) pin connected to pin 2 on the
32
arduino.
33
33
34
* 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
35
35
LED on pin 4 is in the centre of the clock face and the LED on pin
36
36
13 is at the outside.
37
37
38
38
* if a longer hand (and a larger clock face) is desired, pin 4 can be
39
39
used to indirectly drive a transistor which in turn drives several
40
LEDs that turn on and off in unison in the centre of the clock.
40
LEDs that turn on anf off in unison in the centre of the clock.
41
41
42
42
* a button should be attached to pin 3 that grounds it when pressed.
43
43
44
* A DS1307 remote clock is connected via I2C on analogue pins 4 and 5.
44
* A DS1307 remote clock is connected via I2C on analog pins 4 and 5.
45
45
46
46
Implementation details:
47
47
50
50
* the timing of the drawing of the clock face is recalculated with
51
51
every rotation of the propeller.
52
52
53
* a PC fan actually sends 2 tachometer pulses per revolution, so the
53
* a PC fan actually sends 2 tachiometer pulses per revolution, so the
54
54
software skips every other one. This means that the clock may
55
55
appear upside-down if started with the propeller in the wrong
56
position. You will need to experiment to discover the position that
56
position. You will need to experiment to dicsover the position that
57
57
the propeller must be in when starting the clock.
58
58
59
59
Usage instructions:
75
75
76
76
******************************************************************************/
77
77
78
#include "config.h"
79
#include "button.h"
80
#include "time.h"
81
#include "Arduino.h"
82
#include "modes/analogue_clock.h"
83
#include "modes/digital_clock.h"
84
#include "modes/test_pattern.h"
85
#include "modes/settings_mode.h"
86
#include "modes/info_mode.h"
87
#include "text.h"
88
#include "text_renderer.h"
89
#include "common.h"
78
79
#include <Bounce.h>
80
#include <DS1307.h>
81
#include <Wire.h>
90
82
91
83
//_____________________________________________________________________________
92
84
// data
93
85
86
94
87
// when non-zero, the time (in microseconds) of a new fan pulse that
95
88
// has just occurred, which means that segment drawing needs to be
96
89
// restarted
97
static unsigned long _new_pulse_at = 0;
90
static unsigned long new_pulse_at = 0;
98
91
99
92
// the time (in microseconds) when the last fan pulse occurred
100
static unsigned long _last_pulse_at = 0;
93
static unsigned long last_pulse_at = 0;
101
94
102
95
// duration (in microseconds) that a segment should be displayed
103
static unsigned long _segment_step = 0;
96
static unsigned long segment_step = 0;
104
97
105
98
// remainder after divisor and a tally of the remainders for each segment
106
static unsigned long _segment_step_sub_step = 0;
107
static unsigned long _segment_step_sub = 0;
108
109
// the button
110
static Button _button( 3 );
111
112
// modes
113
static int _major_mode = 0;
114
static int _minor_mode = 0;
115
116
#define SETTINGS_MODE_IDX 1
117
#define MAIN_MODE_IDX 0
118
119
#define ANALOGUE_CLOCK_IDX 0
120
#define DIGITAL_CLOCK_IDX 1
121
#define INFO_MODE_IDX 2
122
#define TEST_PATTERN_IDX 3
99
static unsigned long segment_step_sub_step = 0;
100
static unsigned long segment_step_sub = 0;
101
102
// flag to indicate that the drawing mode should be cycled to the next one
103
static bool inc_draw_mode = false;
104
105
// a bounce-managed button
106
static Bounce button( 3, 50 );
107
108
// the time
109
static int time_hours = 0;
110
static int time_minutes = 0;
111
static int time_seconds = 0;
112
113
// number of segments in a full display (rotation) is 60 (one per
114
// second) times the desired number of sub-divisions of a second
115
#define NUM_SECOND_SEGMENTS 5
116
#define NUM_SEGMENTS ( 60 * NUM_SECOND_SEGMENTS )
123
117
124
118
//_____________________________________________________________________________
125
119
// code
126
120
127
121
128
// activate the current minor mode
129
void activate_minor_mode()
130
{
131
// reset text
132
Text::reset();
133
leds_off();
134
135
// give the mode a chance to init
136
switch( _minor_mode ) {
137
case ANALOGUE_CLOCK_IDX: analogue_clock_activate(); break;
138
case DIGITAL_CLOCK_IDX: digital_clock_activate(); break;
139
case INFO_MODE_IDX: info_mode_activate(); break;
140
}
141
}
142
143
144
// activate major mode
145
void activate_major_mode()
146
{
147
// reset text
148
Text::reset();
149
leds_off();
150
151
// reset buttons
152
_button.set_press_mode( _major_mode != SETTINGS_MODE_IDX );
153
154
// give the mode a chance to init
155
switch( _major_mode ) {
156
case MAIN_MODE_IDX: activate_minor_mode(); break;
157
case SETTINGS_MODE_IDX: settings_mode_activate(); break;
158
}
159
}
160
161
162
// perform button events
163
void do_button_events()
164
{
165
// loop through pending events
166
while( int event = _button.get_event() )
167
{
168
switch( event )
169
{
170
case 1:
171
// short press
172
switch( _major_mode ) {
173
case MAIN_MODE_IDX:
174
switch( _minor_mode ) {
175
case ANALOGUE_CLOCK_IDX: analogue_clock_press(); break;
176
case DIGITAL_CLOCK_IDX: digital_clock_press(); break;
177
case INFO_MODE_IDX: info_mode_press(); break;
178
}
179
break;
180
case SETTINGS_MODE_IDX: settings_mode_press(); break;
181
}
182
break;
183
184
case 2:
185
// long press
186
switch( _major_mode ) {
187
case MAIN_MODE_IDX:
188
if( ++_minor_mode >= 4 )
189
_minor_mode = 0;
190
activate_minor_mode();
191
break;
192
case SETTINGS_MODE_IDX: settings_mode_long_press(); break;
193
}
194
break;
195
196
case 3:
197
// looooong press (change major mode)
198
if( ++_major_mode > 1 )
199
_major_mode = 0;
200
activate_major_mode();
201
break;
122
// check for button presses
123
void checkButtons()
124
{
125
// update buttons
126
button.update();
127
128
// notice button presses
129
if( button.risingEdge() )
130
inc_draw_mode = true;
131
}
132
133
134
// keep track of time
135
void trackTime()
136
{
137
// previous time and any carried-over milliseconds
138
static unsigned long last_time = millis();
139
static unsigned long carry = 0;
140
141
// how many milliseonds have elapsed since we last checked?
142
unsigned long next_time = millis();
143
unsigned long delta = next_time - last_time + carry;
144
145
// update the previous time and carried-over milliseconds
146
last_time = next_time;
147
carry = delta % 1000;
148
149
// add the seconds that have passed to the time
150
time_seconds += delta / 1000;
151
while( time_seconds >= 60 ) {
152
time_seconds -= 60;
153
time_minutes++;
154
if( time_minutes >= 60 ) {
155
time_minutes -= 60;
156
time_hours++;
157
if( time_hours >= 24 )
158
time_hours -= 24;
202
159
}
203
160
}
204
161
}
205
162
206
163
207
// draw a display segment
208
void draw_next_segment( bool reset )
164
// turn an led on/off
165
void ledOn( int num, bool on )
166
{
167
if( num < 0 || num > 9 ) return;
168
169
// convert to pin no.
170
num += 4;
171
172
// pin 4 needs to be inverted (it's driving a PNP)
173
// NOTE: PIN 4 TEMPORARILY DISABLED
174
if( num == 4 ) on = true; //!on
175
176
digitalWrite( num, on? HIGH : LOW );
177
}
178
179
180
// draw a segment for the test display
181
void drawNextSegment_test( bool reset )
209
182
{
210
183
// keep track of segment
211
#if CLOCK_FORWARD
212
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
213
if( reset ) segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
214
#else
215
static int segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
216
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
217
#endif
218
219
// reset the text renderer
220
TextRenderer::reset_buffer();
221
222
// frame reset
184
static unsigned int segment = 0;
185
if( reset ) segment = 0;
186
segment++;
187
188
// turn on inside and outside LEDs
189
ledOn( 0, true );
190
ledOn( 9, true );
191
192
// display segment number in binary across in the inside LEDs,
193
// with the LED on pin 12 showing the least-significant bit
194
for( int a = 0; a < 8; a++ )
195
ledOn( 8 - a, ( segment >> a ) & 1 );
196
}
197
198
199
// draw a segment for the time display
200
void drawNextSegment_time( bool reset )
201
{
202
static int second = 0;
203
static int segment = 0;
204
205
// handle display reset
223
206
if( reset ) {
224
switch( _major_mode ) {
225
case MAIN_MODE_IDX:
226
switch( _minor_mode ) {
227
case ANALOGUE_CLOCK_IDX: analogue_clock_draw_reset(); break;
228
case DIGITAL_CLOCK_IDX: digital_clock_draw_reset(); break;
229
case INFO_MODE_IDX: info_mode_draw_reset(); break;
230
}
231
break;
232
case SETTINGS_MODE_IDX: settings_mode_draw_reset(); break;
233
}
234
235
// tell the text services we're starting a new frame
236
Text::draw_reset();
237
}
238
239
// draw
240
switch( _major_mode ) {
241
case MAIN_MODE_IDX:
242
switch( _minor_mode ) {
243
case ANALOGUE_CLOCK_IDX: analogue_clock_draw( segment ); break;
244
case DIGITAL_CLOCK_IDX: digital_clock_draw( segment ); break;
245
case TEST_PATTERN_IDX: test_pattern_draw( segment ); break;
246
case INFO_MODE_IDX: info_mode_draw( segment ); break;
247
}
248
break;
249
case SETTINGS_MODE_IDX: settings_mode_draw( segment ); break;
250
}
251
Text::post_draw();
252
253
// draw any text that was rendered
254
TextRenderer::output_buffer();
255
256
#if CLOCK_FORWARD
257
if( ++segment >= NUM_SEGMENTS ) segment = 0;
258
#else
259
if( --segment < 0 ) segment = NUM_SEGMENTS - 1;
260
#endif
207
second = 0;
208
segment = 0;
209
}
210
211
// what needs to be drawn?
212
bool draw_tick = !segment && second % 5 == 0;
213
bool draw_second = !segment && second == time_seconds;
214
bool draw_minute = !segment && second == time_minutes;
215
bool draw_hour = !segment && second == time_hours;
216
217
// set the LEDs
218
ledOn( 9, true );
219
ledOn( 8, draw_tick || draw_minute );
220
for( int a = 6; a <= 7; a++ )
221
ledOn( a, draw_minute || draw_second );
222
for( int a = 0; a <= 5; a++ )
223
ledOn( a, draw_minute || draw_second || draw_hour );
224
225
// inc position
226
if( ++segment >= NUM_SECOND_SEGMENTS ) {
227
segment = 0;
228
second++;
229
}
230
}
231
232
233
// draw a display segment
234
void drawNextSegment( bool reset )
235
{
236
static int draw_mode = 0;
237
238
// handle mode switch requests
239
if( reset && inc_draw_mode ) {
240
inc_draw_mode = false;
241
draw_mode++;
242
if( draw_mode >= 2 )
243
draw_mode = 0;
244
}
245
246
// draw the segment
247
switch( draw_mode ) {
248
case 0: drawNextSegment_test( reset ); break;
249
case 1: drawNextSegment_time( reset ); break;
250
}
261
251
}
262
252
263
253
264
254
// calculate time constants when a new pulse has occurred
265
void calculate_segment_times()
255
void calculateSegmentTimes()
266
256
{
267
257
// check for overflows, and only recalculate times if there isn't
268
258
// one (if there is, we'll just go with the last pulse's times)
269
if( _new_pulse_at > _last_pulse_at )
259
if( new_pulse_at > last_pulse_at )
270
260
{
271
261
// new segment stepping times
272
unsigned long delta = _new_pulse_at - _last_pulse_at;
273
_segment_step = delta / NUM_SEGMENTS;
274
_segment_step_sub = 0;
275
_segment_step_sub_step = delta % NUM_SEGMENTS;
262
unsigned long delta = new_pulse_at - last_pulse_at;
263
segment_step = delta / NUM_SEGMENTS;
264
segment_step_sub = 0;
265
segment_step_sub_step = delta % NUM_SEGMENTS;
276
266
}
277
267
278
268
// now we have dealt with this pulse, save the pulse time and
279
269
// clear new_pulse_at, ready for the next pulse
280
_last_pulse_at = _new_pulse_at;
281
_new_pulse_at = 0;
270
last_pulse_at = new_pulse_at;
271
new_pulse_at = 0;
282
272
}
283
273
284
274
285
275
// wait until it is time to draw the next segment or a new pulse has
286
276
// occurred
287
void wait_till_end_of_segment( bool reset )
277
void waitTillNextSegment( bool reset )
288
278
{
289
279
static unsigned long end_time = 0;
290
280
291
281
// handle reset
292
282
if( reset )
293
end_time = _last_pulse_at;
283
end_time = last_pulse_at;
294
284
295
285
// work out the time that this segment should be displayed until
296
end_time += _segment_step;
297
_segment_step_sub += _segment_step_sub_step;
298
if( _segment_step_sub >= NUM_SEGMENTS ) {
299
_segment_step_sub -= NUM_SEGMENTS;
286
end_time += segment_step;
287
segment_step_sub += segment_step_sub_step;
288
if( segment_step_sub >= NUM_SEGMENTS ) {
289
segment_step_sub -= NUM_SEGMENTS;
300
290
end_time++;
301
291
}
302
292
303
293
// wait
304
while( micros() < end_time && !_new_pulse_at );
294
while( micros() < end_time && !new_pulse_at );
305
295
}
306
296
307
297
308
// ISR to handle the pulses from the fan's tachometer
309
void fan_pulse_handler()
298
// ISR to handle the pulses from the fan's tachiometer
299
void fanPulseHandler()
310
300
{
311
301
// the fan actually sends two pulses per revolution. These pulses
312
302
// may not be exactly evenly distributed around the rotation, so
317
307
if( !ignore )
318
308
{
319
309
// set a new pulse time
320
_new_pulse_at = micros();
310
new_pulse_at = micros();
321
311
}
322
312
}
323
313
325
315
// main setup
326
316
void setup()
327
317
{
328
// set up an interrupt handler on pin 2 to notice fan pulses
329
attachInterrupt( 0, fan_pulse_handler, RISING );
318
// set up an interrupt handler on pin 2 to nitice fan pulses
319
attachInterrupt( 0, fanPulseHandler, RISING );
330
320
digitalWrite( 2, HIGH );
331
321
332
322
// set up output pins (4 to 13) for the led array
336
326
// set up mode-switch button on pin 3
337
327
pinMode( 3, INPUT );
338
328
digitalWrite( 3, HIGH );
339
static int event_times[] = { 5, 500, 4000, 0 };
340
_button.set_event_times( event_times );
341
342
// initialise RTC
343
Time::init();
344
345
// init text renderer
346
TextRenderer::init();
347
348
// activate the minor mode
349
activate_major_mode();
329
330
// get the time from the real-time clock
331
int rtc_data[ 7 ];
332
RTC.get( rtc_data, true );
333
time_hours = rtc_data[ DS1307_HR ];
334
time_minutes = rtc_data[ DS1307_MIN ];
335
time_seconds = rtc_data[ DS1307_SEC ];
336
337
// serial comms
338
Serial.begin( 9600 );
350
339
}
351
340
352
341
354
343
void loop()
355
344
{
356
345
// if there has been a new pulse, we'll be resetting the display
357
bool reset = _new_pulse_at? true : false;
358
359
// update button
360
_button.update();
346
bool reset = new_pulse_at? true : false;
361
347
362
348
// only do this stuff at the start of a display cycle, to ensure
363
349
// that no state changes mid-display
364
350
if( reset )
365
351
{
366
// calculate segment times
367
calculate_segment_times();
352
// check buttons
353
checkButtons();
368
354
369
355
// keep track of time
370
Time::update();
371
372
// perform button events
373
do_button_events();
356
trackTime();
374
357
}
375
358
376
359
// draw this segment
377
draw_next_segment( reset );
360
drawNextSegment( reset );
361
362
// do we need to recalculate segment times?
363
if( reset )
364
calculateSegmentTimes();
378
365
379
366
// wait till it's time to draw the next segment
380
wait_till_end_of_segment( reset );
367
waitTillNextSegment( reset );
381
368
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0