29
29
* a PC fan is wired up to a 12V power supply
31
* the fan's SENSE (tachometer) pin connected to pin 2 on the
31
* the fan's SENSE (tachiometer) pin connected to pin 2 on the
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.
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.
42
42
* a button should be attached to pin 3 that grounds it when pressed.
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.
46
46
Implementation details:
50
50
* the timing of the drawing of the clock face is recalculated with
51
51
every rotation of the propeller.
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.
59
59
Usage instructions:
76
76
******************************************************************************/
78
79
#include "config.h"
82
#include "analogue_clock.h"
83
#include "digital_clock.h"
84
#include "test_pattern.h"
85
#include "settings_mode.h"
87
#include "text_renderer.h"
81
#include "mode_switcher.h"
90
84
//_____________________________________________________________________________
93
88
// when non-zero, the time (in microseconds) of a new fan pulse that
94
89
// has just occurred, which means that segment drawing needs to be
96
static unsigned long _new_pulse_at = 0;
91
static unsigned long new_pulse_at = 0;
98
93
// the time (in microseconds) when the last fan pulse occurred
99
static unsigned long _last_pulse_at = 0;
94
static unsigned long last_pulse_at = 0;
101
96
// duration (in microseconds) that a segment should be displayed
102
static unsigned long _segment_step = 0;
97
static unsigned long segment_step = 0;
104
99
// remainder after divisor and a tally of the remainders for each segment
105
static unsigned long _segment_step_sub_step = 0;
106
static unsigned long _segment_step_sub = 0;
100
static unsigned long segment_step_sub_step = 0;
101
static unsigned long segment_step_sub = 0;
109
static Button _button( 3 );
112
static int _major_mode = 0;
113
static int _minor_mode = 0;
115
#define MAIN_MODE_IDX 1
116
#define SETTINGS_MODE_IDX 0
118
#define ANALOGUE_CLOCK_IDX 0
119
#define DIGITAL_CLOCK_IDX 1
120
#define TEST_PATTERN_IDX 2
104
static Button button( 3 );
107
static int major_mode = 0;
110
static std::vector< MajorMode * > major_modes;
122
112
//_____________________________________________________________________________
126
// activate the current minor mode
127
void activate_minor_mode()
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;
141
// activate major mode
142
void activate_major_mode()
148
// give the mode a chance to init
149
switch( _major_mode ) {
150
case MAIN_MODE_IDX: activate_minor_mode(); break;
151
case SETTINGS_MODE_IDX: settings_mode_activate(); break;
156
// perform button events
157
void do_button_events()
159
// loop through pending events
160
while( int event = _button.get_event() )
166
switch( _major_mode ) {
168
switch( _minor_mode ) {
169
case ANALOGUE_CLOCK_IDX: analogue_clock_press(); break;
170
case DIGITAL_CLOCK_IDX: digital_clock_press(); break;
173
case SETTINGS_MODE_IDX: settings_mode_press(); break;
179
switch( _major_mode ) {
181
if( ++_minor_mode >= 3 )
183
activate_minor_mode();
185
case SETTINGS_MODE_IDX: settings_mode_long_press(); break;
190
// looooong press (change major mode)
191
if( ++_major_mode > 1 )
193
activate_major_mode();
116
// check for button presses
120
int event = button.update();
125
major_modes[ major_mode ]->short_press();
128
major_modes[ major_mode ]->long_press();
131
if( ++major_mode >= major_modes.size() )
133
major_modes[ major_mode ]->activate();
200
139
// draw a display segment
201
void draw_next_segment( bool reset )
140
void drawNextSegment( bool reset )
203
142
// keep track of segment
204
143
#if CLOCK_FORWARD
209
148
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
212
// reset the text renderer
213
TextRenderer::reset_buffer();
217
switch( _major_mode ) {
219
switch( _minor_mode ) {
220
case ANALOGUE_CLOCK_IDX: analogue_clock_draw_reset(); break;
221
case DIGITAL_CLOCK_IDX: digital_clock_draw_reset(); break;
224
case SETTINGS_MODE_IDX: settings_mode_draw_reset(); break;
227
// tell the text services we're starting a new frame
232
switch( _major_mode ) {
234
switch( _minor_mode ) {
235
case ANALOGUE_CLOCK_IDX: analogue_clock_draw( segment ); break;
236
case DIGITAL_CLOCK_IDX: digital_clock_draw( segment ); break;
237
case TEST_PATTERN_IDX: test_pattern_draw( segment ); break;
240
case SETTINGS_MODE_IDX: settings_mode_draw( segment ); break;
243
// draw any text that was rendered
244
TextRenderer::output_buffer();
152
Drawer &drawer = major_modes[ major_mode ]->get_drawer();
153
if( reset ) drawer.draw_reset();
154
drawer.draw( segment );
246
156
#if CLOCK_FORWARD
247
157
if( ++segment >= NUM_SEGMENTS ) segment = 0;
254
164
// calculate time constants when a new pulse has occurred
255
void calculate_segment_times()
165
void calculateSegmentTimes()
257
167
// check for overflows, and only recalculate times if there isn't
258
168
// one (if there is, we'll just go with the last pulse's times)
259
if( _new_pulse_at > _last_pulse_at )
169
if( new_pulse_at > last_pulse_at )
261
171
// new segment stepping times
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;
172
unsigned long delta = new_pulse_at - last_pulse_at;
173
segment_step = delta / NUM_SEGMENTS;
174
segment_step_sub = 0;
175
segment_step_sub_step = delta % NUM_SEGMENTS;
268
178
// now we have dealt with this pulse, save the pulse time and
269
179
// clear new_pulse_at, ready for the next pulse
270
_last_pulse_at = _new_pulse_at;
180
last_pulse_at = new_pulse_at;
275
185
// wait until it is time to draw the next segment or a new pulse has
277
void wait_till_end_of_segment( bool reset )
187
void waitTillNextSegment( bool reset )
279
189
static unsigned long end_time = 0;
283
end_time = _last_pulse_at;
193
end_time = last_pulse_at;
285
195
// work out the time that this segment should be displayed until
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;
196
end_time += segment_step;
197
segment_step_sub += segment_step_sub_step;
198
if( segment_step_sub >= NUM_SEGMENTS ) {
199
segment_step_sub -= NUM_SEGMENTS;
294
while( micros() < end_time && !_new_pulse_at );
204
while( micros() < end_time && !new_pulse_at );
298
208
// ISR to handle the pulses from the fan's tachiometer
299
void fan_pulse_handler()
209
void fanPulseHandler()
301
211
// the fan actually sends two pulses per revolution. These pulses
302
212
// may not be exactly evenly distributed around the rotation, so
326
236
// set up mode-switch button on pin 3
327
237
pinMode( 3, INPUT );
328
238
digitalWrite( 3, HIGH );
329
static int event_times[] = { 5, 500, 4000, 0 };
330
_button.set_event_times( event_times );
335
// activate the minor mode
336
activate_major_mode();
239
button.add_event_at( 5, 1 );
240
button.add_event_at( 1000, 2 );
241
button.add_event_at( 4000, 3 );
244
Serial.begin( 9600 );
246
// set up major modes
247
static ModeSwitcher mode_switcher;
248
major_modes.push_back( &mode_switcher );
249
major_modes[ 0 ]->activate();
343
256
// if there has been a new pulse, we'll be resetting the display
344
bool reset = _new_pulse_at? true : false;
257
bool reset = new_pulse_at? true : false;
349
259
// only do this stuff at the start of a display cycle, to ensure
350
260
// that no state changes mid-display
353
// calculate segment times
354
calculate_segment_times();
356
266
// keep track of time
359
// perform button events
267
Time &time = Time::get_instance();
363
271
// draw this segment
364
draw_next_segment( reset );
272
drawNextSegment( reset );
274
// do we need to recalculate segment times?
276
calculateSegmentTimes();
366
278
// wait till it's time to draw the next segment
367
wait_till_end_of_segment( reset );
279
waitTillNextSegment( reset );
added
removed
src/propeller-clock.ino
