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 55
- compare with another revision
- download diff
- download tarball
- view history from revision 55
- Committer: edam
- Date: 2012-02-25 01:29:52 UTC
- Revision ID: tim@ed.am-20120225012952-32q8gg07aovk3qxh
updated arduino.mk
- files added:
- src/util/Bounce.cpp
- files removed:
- src/button.cc
- 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 MAIN_MODE_IDX 1
117
#define SETTINGS_MODE_IDX 0
118
119
#define ANALOGUE_CLOCK_IDX 0
120
#define DIGITAL_CLOCK_IDX 1
121
#define TEST_PATTERN_IDX 2
122
#define INFO_MODE_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 )
117
118
// clock draw direction
119
#define CLOCK_FORWARD 0
120
121
// rotate display (in segments)
122
#define CLOCK_SHIFT ( 58 * NUM_SECOND_SEGMENTS - 1 )
123
123
124
124
//_____________________________________________________________________________
125
125
// code
126
126
127
127
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 >= 3 )
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;
128
// check for button presses
129
void checkButtons()
130
{
131
// update buttons
132
button.update();
133
134
// notice button presses
135
if( button.risingEdge() )
136
inc_draw_mode = true;
137
}
138
139
140
// keep track of time
141
void trackTime()
142
{
143
// previous time and any carried-over milliseconds
144
static unsigned long last_time = millis();
145
static unsigned long carry = 0;
146
147
// how many milliseonds have elapsed since we last checked?
148
unsigned long next_time = millis();
149
unsigned long delta = next_time - last_time + carry;
150
151
// update the previous time and carried-over milliseconds
152
last_time = next_time;
153
carry = delta % 1000;
154
155
// add the seconds that have passed to the time
156
time_seconds += delta / 1000;
157
while( time_seconds >= 60 ) {
158
time_seconds -= 60;
159
time_minutes++;
160
if( time_minutes >= 60 ) {
161
time_minutes -= 60;
162
time_hours++;
163
if( time_hours >= 24 )
164
time_hours -= 24;
202
165
}
203
166
}
204
167
}
205
168
206
169
170
// turn an led on/off
171
void ledOn( int num, bool on )
172
{
173
if( num < 0 || num > 9 ) return;
174
175
// convert to pin no.
176
num += 4;
177
178
// pin 4 needs to be inverted (it's driving a PNP)
179
if( num == 4 ) on = !on;
180
181
digitalWrite( num, on? HIGH : LOW );
182
}
183
184
185
// draw a segment for the test display
186
void drawNextSegment_test( int segment )
187
{
188
// turn on outside LEDs
189
ledOn( 9, true );
190
191
// display segment number in binary across in the inside LEDs,
192
// with the LED on pin 12 showing the least-significant bit
193
for( int a = 0; a < 9; a++ )
194
ledOn( 8 - a, ( segment >> a ) & 1 );
195
}
196
197
198
// draw a segment for the time display
199
void drawNextSegment_time( int segment )
200
{
201
int second = segment / NUM_SECOND_SEGMENTS;
202
int second_segment = segment % NUM_SECOND_SEGMENTS;
203
204
// what needs to be drawn?
205
bool draw_tick = ( !second_segment && second % 5 == 0 && second ) ||
206
( second == 0 && second_segment == 1 ) ||
207
( second == 59 && second_segment == NUM_SECOND_SEGMENTS - 1 );
208
bool draw_second = !second_segment && second == time_seconds;
209
bool draw_minute = !second_segment && second == time_minutes;
210
bool draw_hour = segment == time_hours * 5 * NUM_SECOND_SEGMENTS +
211
( 5 * NUM_SECOND_SEGMENTS * time_minutes / 60 );
212
213
// set the LEDs
214
ledOn( 9, true );
215
ledOn( 8, draw_tick || draw_second );
216
for( int a = 6; a <= 7; a++ )
217
ledOn( a, draw_minute || draw_second );
218
for( int a = 0; a <= 5; a++ )
219
ledOn( a, draw_minute || draw_second || draw_hour );
220
}
221
222
207
223
// draw a display segment
208
void draw_next_segment( bool reset )
224
void drawNextSegment( bool reset )
209
225
{
226
static int draw_mode = 0;
227
210
228
// keep track of segment
211
229
#if CLOCK_FORWARD
212
230
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
216
234
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
217
235
#endif
218
236
219
// reset the text renderer
220
TextRenderer::reset_buffer();
221
222
// frame reset
223
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
252
// draw any text that was rendered
253
TextRenderer::output_buffer();
237
// handle mode switch requests
238
if( reset && inc_draw_mode ) {
239
inc_draw_mode = false;
240
draw_mode++;
241
if( draw_mode >= 2 )
242
draw_mode = 0;
243
}
244
245
// draw the segment
246
switch( draw_mode ) {
247
case 0: drawNextSegment_test( segment ); break;
248
case 1: drawNextSegment_time( segment ); break;
249
}
254
250
255
251
#if CLOCK_FORWARD
256
252
if( ++segment >= NUM_SEGMENTS ) segment = 0;
261
257
262
258
263
259
// calculate time constants when a new pulse has occurred
264
void calculate_segment_times()
260
void calculateSegmentTimes()
265
261
{
266
262
// check for overflows, and only recalculate times if there isn't
267
263
// one (if there is, we'll just go with the last pulse's times)
268
if( _new_pulse_at > _last_pulse_at )
264
if( new_pulse_at > last_pulse_at )
269
265
{
270
266
// new segment stepping times
271
unsigned long delta = _new_pulse_at - _last_pulse_at;
272
_segment_step = delta / NUM_SEGMENTS;
273
_segment_step_sub = 0;
274
_segment_step_sub_step = delta % NUM_SEGMENTS;
267
unsigned long delta = new_pulse_at - last_pulse_at;
268
segment_step = delta / NUM_SEGMENTS;
269
segment_step_sub = 0;
270
segment_step_sub_step = delta % NUM_SEGMENTS;
275
271
}
276
272
277
273
// now we have dealt with this pulse, save the pulse time and
278
274
// clear new_pulse_at, ready for the next pulse
279
_last_pulse_at = _new_pulse_at;
280
_new_pulse_at = 0;
275
last_pulse_at = new_pulse_at;
276
new_pulse_at = 0;
281
277
}
282
278
283
279
284
280
// wait until it is time to draw the next segment or a new pulse has
285
281
// occurred
286
void wait_till_end_of_segment( bool reset )
282
void waitTillNextSegment( bool reset )
287
283
{
288
284
static unsigned long end_time = 0;
289
285
290
286
// handle reset
291
287
if( reset )
292
end_time = _last_pulse_at;
288
end_time = last_pulse_at;
293
289
294
290
// work out the time that this segment should be displayed until
295
end_time += _segment_step;
296
_segment_step_sub += _segment_step_sub_step;
297
if( _segment_step_sub >= NUM_SEGMENTS ) {
298
_segment_step_sub -= NUM_SEGMENTS;
291
end_time += segment_step;
292
segment_step_sub += segment_step_sub_step;
293
if( segment_step_sub >= NUM_SEGMENTS ) {
294
segment_step_sub -= NUM_SEGMENTS;
299
295
end_time++;
300
296
}
301
297
302
298
// wait
303
while( micros() < end_time && !_new_pulse_at );
299
while( micros() < end_time && !new_pulse_at );
304
300
}
305
301
306
302
307
// ISR to handle the pulses from the fan's tachometer
308
void fan_pulse_handler()
303
// ISR to handle the pulses from the fan's tachiometer
304
void fanPulseHandler()
309
305
{
310
306
// the fan actually sends two pulses per revolution. These pulses
311
307
// may not be exactly evenly distributed around the rotation, so
316
312
if( !ignore )
317
313
{
318
314
// set a new pulse time
319
_new_pulse_at = micros();
315
new_pulse_at = micros();
320
316
}
321
317
}
322
318
324
320
// main setup
325
321
void setup()
326
322
{
327
// set up an interrupt handler on pin 2 to notice fan pulses
328
attachInterrupt( 0, fan_pulse_handler, RISING );
323
// set up an interrupt handler on pin 2 to nitice fan pulses
324
attachInterrupt( 0, fanPulseHandler, RISING );
329
325
digitalWrite( 2, HIGH );
330
326
331
327
// set up output pins (4 to 13) for the led array
335
331
// set up mode-switch button on pin 3
336
332
pinMode( 3, INPUT );
337
333
digitalWrite( 3, HIGH );
338
static int event_times[] = { 5, 500, 4000, 0 };
339
_button.set_event_times( event_times );
340
341
// initialise RTC
342
Time::init();
343
344
// init text renderer
345
TextRenderer::init();
346
347
// activate the minor mode
348
activate_major_mode();
334
335
// get the time from the real-time clock
336
int rtc_data[ 7 ];
337
RTC.get( rtc_data, true );
338
time_hours = rtc_data[ DS1307_HR ];
339
time_minutes = rtc_data[ DS1307_MIN ];
340
time_seconds = rtc_data[ DS1307_SEC ];
341
342
// serial comms
343
Serial.begin( 9600 );
349
344
}
350
345
351
346
353
348
void loop()
354
349
{
355
350
// if there has been a new pulse, we'll be resetting the display
356
bool reset = _new_pulse_at? true : false;
357
358
// update button
359
_button.update();
351
bool reset = new_pulse_at? true : false;
360
352
361
353
// only do this stuff at the start of a display cycle, to ensure
362
354
// that no state changes mid-display
363
355
if( reset )
364
356
{
365
// calculate segment times
366
calculate_segment_times();
357
// check buttons
358
checkButtons();
367
359
368
360
// keep track of time
369
Time::update();
370
371
// perform button events
372
do_button_events();
361
trackTime();
373
362
}
374
363
375
364
// draw this segment
376
draw_next_segment( reset );
365
drawNextSegment( reset );
366
367
// do we need to recalculate segment times?
368
if( reset )
369
calculateSegmentTimes();
377
370
378
371
// wait till it's time to draw the next segment
379
wait_till_end_of_segment( reset );
372
waitTillNextSegment( reset );
380
373
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0