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 76
- compare with another revision
- download diff
- download tarball
- view history from revision 76
- Committer: edam
- Date: 2012-03-23 15:56:07 UTC
- Revision ID: tim@ed.am-20120323155607-6h8pc0c6o35nl179
switch button to no interim presses during settings mode; added NVRAM support
- files added:
- src/analogue_clock.cc
- test/rtc-test
- test/rtc-test/util
- files removed:
- src/util/Bounce.cpp
- files renamed:
- src/propeller-clock.ino => src/propeller-clock.cc
- files modified:
- .bzrignore
- src/Makefile
added
removed
src/propeller-clock.cc
28
28
29
29
* a PC fan is wired up to a 12V power supply
30
30
31
* the fan's SENSE (tachiometer) pin connected to pin 2 on the
32
arduino.
31
* the fan's SENSE (tachometer) 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 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.
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 analog pins 4 and 5.
44
* A DS1307 remote clock is connected via I2C on analogue 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 tachiometer pulses per revolution, so the
53
* a PC fan actually sends 2 tachometer 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 dicsover the position that
56
position. You will need to experiment to discover 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
79
#include <Bounce.h>
80
#include <DS1307.h>
81
#include <Wire.h>
78
#include "config.h"
79
#include "button.h"
80
#include "time.h"
81
#include "Arduino.h"
82
#include "analogue_clock.h"
83
#include "digital_clock.h"
84
#include "test_pattern.h"
85
#include "settings_mode.h"
86
#include "text.h"
87
#include "text_renderer.h"
88
#include "common.h"
82
89
83
90
//_____________________________________________________________________________
84
91
// data
85
92
86
87
93
// when non-zero, the time (in microseconds) of a new fan pulse that
88
94
// has just occurred, which means that segment drawing needs to be
89
95
// restarted
90
static unsigned long new_pulse_at = 0;
96
static unsigned long _new_pulse_at = 0;
91
97
92
98
// the time (in microseconds) when the last fan pulse occurred
93
static unsigned long last_pulse_at = 0;
99
static unsigned long _last_pulse_at = 0;
94
100
95
101
// duration (in microseconds) that a segment should be displayed
96
static unsigned long segment_step = 0;
102
static unsigned long _segment_step = 0;
97
103
98
104
// remainder after divisor and a tally of the remainders for each segment
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 )
105
static unsigned long _segment_step_sub_step = 0;
106
static unsigned long _segment_step_sub = 0;
107
108
// the button
109
static Button _button( 3 );
110
111
// modes
112
static int _major_mode = 0;
113
static int _minor_mode = 0;
114
115
#define MAIN_MODE_IDX 1
116
#define SETTINGS_MODE_IDX 0
117
118
#define ANALOGUE_CLOCK_IDX 0
119
#define DIGITAL_CLOCK_IDX 1
120
#define TEST_PATTERN_IDX 2
123
121
124
122
//_____________________________________________________________________________
125
123
// code
126
124
127
125
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;
126
// activate the current minor mode
127
void activate_minor_mode()
128
{
129
// reset text
130
Text::reset();
131
leds_off();
132
133
// give the mode a chance to init
134
switch( _minor_mode ) {
135
case ANALOGUE_CLOCK_IDX: analogue_clock_activate(); break;
136
case DIGITAL_CLOCK_IDX: digital_clock_activate(); break;
137
}
138
}
139
140
141
// activate major mode
142
void activate_major_mode()
143
{
144
// reset text
145
Text::reset();
146
leds_off();
147
148
// reset buttons
149
_button.set_press_mode( _major_mode != SETTINGS_MODE_IDX );
150
151
// give the mode a chance to init
152
switch( _major_mode ) {
153
case MAIN_MODE_IDX: activate_minor_mode(); break;
154
case SETTINGS_MODE_IDX: settings_mode_activate(); break;
155
}
156
}
157
158
159
// perform button events
160
void do_button_events()
161
{
162
// loop through pending events
163
while( int event = _button.get_event() )
164
{
165
switch( event )
166
{
167
case 1:
168
// short press
169
switch( _major_mode ) {
170
case MAIN_MODE_IDX:
171
switch( _minor_mode ) {
172
case ANALOGUE_CLOCK_IDX: analogue_clock_press(); break;
173
case DIGITAL_CLOCK_IDX: digital_clock_press(); break;
174
}
175
break;
176
case SETTINGS_MODE_IDX: settings_mode_press(); break;
177
}
178
break;
179
180
case 2:
181
// long press
182
switch( _major_mode ) {
183
case MAIN_MODE_IDX:
184
if( ++_minor_mode >= 3 )
185
_minor_mode = 0;
186
activate_minor_mode();
187
break;
188
case SETTINGS_MODE_IDX: settings_mode_long_press(); break;
189
}
190
break;
191
192
case 3:
193
// looooong press (change major mode)
194
if( ++_major_mode > 1 )
195
_major_mode = 0;
196
activate_major_mode();
197
break;
165
198
}
166
199
}
167
200
}
168
201
169
202
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
223
203
// draw a display segment
224
void drawNextSegment( bool reset )
204
void draw_next_segment( bool reset )
225
205
{
226
static int draw_mode = 0;
227
228
206
// keep track of segment
229
207
#if CLOCK_FORWARD
230
208
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
234
212
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
235
213
#endif
236
214
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
}
215
// reset the text renderer
216
TextRenderer::reset_buffer();
217
218
// frame reset
219
if( reset ) {
220
switch( _major_mode ) {
221
case MAIN_MODE_IDX:
222
switch( _minor_mode ) {
223
case ANALOGUE_CLOCK_IDX: analogue_clock_draw_reset(); break;
224
case DIGITAL_CLOCK_IDX: digital_clock_draw_reset(); break;
225
}
226
break;
227
case SETTINGS_MODE_IDX: settings_mode_draw_reset(); break;
228
}
229
230
// tell the text services we're starting a new frame
231
Text::draw_reset();
232
}
233
234
// draw
235
switch( _major_mode ) {
236
case MAIN_MODE_IDX:
237
switch( _minor_mode ) {
238
case ANALOGUE_CLOCK_IDX: analogue_clock_draw( segment ); break;
239
case DIGITAL_CLOCK_IDX: digital_clock_draw( segment ); break;
240
case TEST_PATTERN_IDX: test_pattern_draw( segment ); break;
241
}
242
break;
243
case SETTINGS_MODE_IDX: settings_mode_draw( segment ); break;
244
}
245
246
// draw any text that was rendered
247
TextRenderer::output_buffer();
250
248
251
249
#if CLOCK_FORWARD
252
250
if( ++segment >= NUM_SEGMENTS ) segment = 0;
257
255
258
256
259
257
// calculate time constants when a new pulse has occurred
260
void calculateSegmentTimes()
258
void calculate_segment_times()
261
259
{
262
260
// check for overflows, and only recalculate times if there isn't
263
261
// one (if there is, we'll just go with the last pulse's times)
264
if( new_pulse_at > last_pulse_at )
262
if( _new_pulse_at > _last_pulse_at )
265
263
{
266
264
// new segment stepping times
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;
265
unsigned long delta = _new_pulse_at - _last_pulse_at;
266
_segment_step = delta / NUM_SEGMENTS;
267
_segment_step_sub = 0;
268
_segment_step_sub_step = delta % NUM_SEGMENTS;
271
269
}
272
270
273
271
// now we have dealt with this pulse, save the pulse time and
274
272
// clear new_pulse_at, ready for the next pulse
275
last_pulse_at = new_pulse_at;
276
new_pulse_at = 0;
273
_last_pulse_at = _new_pulse_at;
274
_new_pulse_at = 0;
277
275
}
278
276
279
277
280
278
// wait until it is time to draw the next segment or a new pulse has
281
279
// occurred
282
void waitTillNextSegment( bool reset )
280
void wait_till_end_of_segment( bool reset )
283
281
{
284
282
static unsigned long end_time = 0;
285
283
286
284
// handle reset
287
285
if( reset )
288
end_time = last_pulse_at;
286
end_time = _last_pulse_at;
289
287
290
288
// work out the time that this segment should be displayed until
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;
289
end_time += _segment_step;
290
_segment_step_sub += _segment_step_sub_step;
291
if( _segment_step_sub >= NUM_SEGMENTS ) {
292
_segment_step_sub -= NUM_SEGMENTS;
295
293
end_time++;
296
294
}
297
295
298
296
// wait
299
while( micros() < end_time && !new_pulse_at );
297
while( micros() < end_time && !_new_pulse_at );
300
298
}
301
299
302
300
303
301
// ISR to handle the pulses from the fan's tachiometer
304
void fanPulseHandler()
302
void fan_pulse_handler()
305
303
{
306
304
// the fan actually sends two pulses per revolution. These pulses
307
305
// may not be exactly evenly distributed around the rotation, so
312
310
if( !ignore )
313
311
{
314
312
// set a new pulse time
315
new_pulse_at = micros();
313
_new_pulse_at = micros();
316
314
}
317
315
}
318
316
321
319
void setup()
322
320
{
323
321
// set up an interrupt handler on pin 2 to nitice fan pulses
324
attachInterrupt( 0, fanPulseHandler, RISING );
322
attachInterrupt( 0, fan_pulse_handler, RISING );
325
323
digitalWrite( 2, HIGH );
326
324
327
325
// set up output pins (4 to 13) for the led array
331
329
// set up mode-switch button on pin 3
332
330
pinMode( 3, INPUT );
333
331
digitalWrite( 3, HIGH );
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 );
332
static int event_times[] = { 5, 500, 4000, 0 };
333
_button.set_event_times( event_times );
334
335
// initialise RTC
336
Time::init();
337
338
// init text renderer
339
TextRenderer::init();
340
341
// activate the minor mode
342
activate_major_mode();
344
343
}
345
344
346
345
348
347
void loop()
349
348
{
350
349
// if there has been a new pulse, we'll be resetting the display
351
bool reset = new_pulse_at? true : false;
350
bool reset = _new_pulse_at? true : false;
351
352
// update button
353
_button.update();
352
354
353
355
// only do this stuff at the start of a display cycle, to ensure
354
356
// that no state changes mid-display
355
357
if( reset )
356
358
{
357
// check buttons
358
checkButtons();
359
// calculate segment times
360
calculate_segment_times();
359
361
360
362
// keep track of time
361
trackTime();
363
Time::update();
364
365
// perform button events
366
do_button_events();
362
367
}
363
368
364
369
// draw this segment
365
drawNextSegment( reset );
366
367
// do we need to recalculate segment times?
368
if( reset )
369
calculateSegmentTimes();
370
draw_next_segment( reset );
370
371
371
372
// wait till it's time to draw the next segment
372
waitTillNextSegment( reset );
373
wait_till_end_of_segment( reset );
373
374
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0