29
29
* a PC fan is wired up to a 12V power supply
31
* the fan's SENSE (tachiometer) pin connected to pin 2 on the
31
* the fan's SENSE (tachometer) 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 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.
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 analog pins 4 and 5.
44
* A DS1307 remote clock is connected via I2C on analogue 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 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.
59
59
Usage instructions:
76
76
******************************************************************************/
80
78
#include "config.h"
82
#include "mode_switcher.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"
89
#include "text_renderer.h"
85
92
//_____________________________________________________________________________
89
95
// when non-zero, the time (in microseconds) of a new fan pulse that
90
96
// has just occurred, which means that segment drawing needs to be
92
static unsigned long new_pulse_at = 0;
98
static unsigned long _new_pulse_at = 0;
94
100
// the time (in microseconds) when the last fan pulse occurred
95
static unsigned long last_pulse_at = 0;
101
static unsigned long _last_pulse_at = 0;
97
103
// duration (in microseconds) that a segment should be displayed
98
static unsigned long segment_step = 0;
104
static unsigned long _segment_step = 0;
100
106
// remainder after divisor and a tally of the remainders for each segment
101
static unsigned long segment_step_sub_step = 0;
102
static unsigned long segment_step_sub = 0;
104
// flag to indicate that the drawing mode should be cycled to the next one
105
static bool inc_draw_mode = false;
107
// a bounce-managed button
108
static Button button( 3 );
107
static unsigned long _segment_step_sub_step = 0;
108
static unsigned long _segment_step_sub = 0;
111
static Button _button( 3 );
114
static MajorMode *_modes[ 3 ];
116
// current major mode
117
static int _mode = 0;
110
119
//_____________________________________________________________________________
114
// check for button presses
122
// perform button events
123
void do_button_events()
118
int event = button.update();
123
inc_draw_mode = true;
125
// loop through pending events
126
while( int event = _button.get_event() )
132
_modes[ _mode ]->press();
136
_modes[ _mode ]->long_press();
139
// looooong press (change major mode)
140
_modes[ _mode ]->deactivate();
141
if( !_modes[ ++_mode ] ) _mode = 0;
142
_modes[ _mode ]->activate();
129
// turn an led on/off
130
void ledOn( int num, bool on )
132
if( num < 0 || num > 9 ) return;
134
// convert to pin no.
137
// pin 4 needs to be inverted (it's driving a PNP)
138
if( num == 4 ) on = !on;
140
digitalWrite( num, on? HIGH : LOW );
144
149
// draw a display segment
145
void drawNextSegment( bool reset )
150
void draw_next_segment( bool reset )
147
static ModeSwitcher mode_switcher;
148
static bool init = false;
152
mode_switcher.activate();
155
152
// keep track of segment
156
153
#if CLOCK_FORWARD
157
154
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
161
158
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
161
// reset the text renderer's buffer
162
TextRenderer::reset_buffer();
166
_modes[ _mode ]->draw_reset();
168
// tell the text services we're starting a new frame
165
Drawer &drawer = mode_switcher.get_drawer();
166
if( reset ) drawer.draw_reset();
167
drawer.draw( segment );
173
_modes[ _mode ]->draw( segment );
175
// TODO: remove this hack
178
// draw text rednerer's buffer
179
TextRenderer::output_buffer();
169
181
#if CLOCK_FORWARD
170
182
if( ++segment >= NUM_SEGMENTS ) segment = 0;
177
189
// calculate time constants when a new pulse has occurred
178
void calculateSegmentTimes()
190
void calculate_segment_times()
180
192
// check for overflows, and only recalculate times if there isn't
181
193
// one (if there is, we'll just go with the last pulse's times)
182
if( new_pulse_at > last_pulse_at )
194
if( _new_pulse_at > _last_pulse_at )
184
196
// new segment stepping times
185
unsigned long delta = new_pulse_at - last_pulse_at;
186
segment_step = delta / NUM_SEGMENTS;
187
segment_step_sub = 0;
188
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;
191
203
// now we have dealt with this pulse, save the pulse time and
192
204
// clear new_pulse_at, ready for the next pulse
193
last_pulse_at = new_pulse_at;
205
_last_pulse_at = _new_pulse_at;
198
210
// wait until it is time to draw the next segment or a new pulse has
200
void waitTillNextSegment( bool reset )
212
void wait_till_end_of_segment( bool reset )
202
214
static unsigned long end_time = 0;
206
end_time = last_pulse_at;
218
end_time = _last_pulse_at;
208
220
// work out the time that this segment should be displayed until
209
end_time += segment_step;
210
segment_step_sub += segment_step_sub_step;
211
if( segment_step_sub >= NUM_SEGMENTS ) {
212
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;
217
while( micros() < end_time && !new_pulse_at );
229
while( micros() < end_time && !_new_pulse_at );
221
// ISR to handle the pulses from the fan's tachiometer
222
void fanPulseHandler()
233
// ISR to handle the pulses from the fan's tachometer
234
void fan_pulse_handler()
224
236
// the fan actually sends two pulses per revolution. These pulses
225
237
// may not be exactly evenly distributed around the rotation, so
249
261
// set up mode-switch button on pin 3
250
262
pinMode( 3, INPUT );
251
263
digitalWrite( 3, HIGH );
252
button.add_event_at( 5, 1 );
253
button.add_event_at( 1000, 2 );
254
button.add_event_at( 4000, 3 );
257
Serial.begin( 9600 );
264
static int event_times[] = { 5, 500, 4000, 0 };
265
_button.set_event_times( event_times );
270
// init text renderer
271
TextRenderer::init();
277
static SwitcherMajorMode switcher;
278
static SettingsMajorMode settings;
282
_modes[ mode++ ] = &switcher;
283
_modes[ mode++ ] = &settings;
286
// activate the current major mode
287
_modes[ _mode ]->activate();
264
294
// if there has been a new pulse, we'll be resetting the display
265
bool reset = new_pulse_at? true : false;
295
bool reset = _new_pulse_at? true : false;
267
300
// only do this stuff at the start of a display cycle, to ensure
268
301
// that no state changes mid-display
304
// calculate segment times
305
calculate_segment_times();
274
307
// keep track of time
275
Time &time = Time::get_instance();
310
// perform button events
279
314
// draw this segment
280
drawNextSegment( reset );
282
// do we need to recalculate segment times?
284
calculateSegmentTimes();
315
draw_next_segment( reset );
286
317
// wait till it's time to draw the next segment
287
waitTillNextSegment( reset );
318
wait_till_end_of_segment( reset );
added
removed
src/propeller-clock.cc
