24
25
/******************************************************************************
26
For a schematic, see propeller-clock.sch.
30
- a PC fan is wired up to the 12V supply.
32
- the fan's SENSE (tachiometer) pin is connected to pin 2 on the
35
- the pins 4 to 13 on the arduino should directly drive an LED (the
36
LED on pin 4 is in the centre of the clock face and the LED on pin
39
- if a longer hand (and a larger clock face) is desired, pin 4 can
40
be used to indirectly drive (via a MOSFET) multiple LEDs which
41
turn on and off in unison in the centre of the clock.
43
- a button should be attached to pin 3 that grounds it when pressed.
45
Implementation details:
47
- the timing of the drawing of the clock face is recalculated with
48
every rotation of the propeller (for maximum update speed).
50
- pressing the button cycles between display modes
52
- holding down the button for 2 seconds enters "set time" mode. In
53
this mode, the fan must be held still and the LEDs will indicate
54
what number is being entered for each time digit. Pressing the
55
button increments the current digit. Holding it down moves to the
56
next digit (or leaves "set time" mode when there are no more). In
57
order, the digits (with accepted values) are: hours-tens (0 to 2),
58
hours-ones (0 to 9), minutes-tens (0 to 5), minutes-ones (0 to 9).
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
34
* the pins 4 to 13 on the Arduino should directly drive an LED (the
35
LED on pin 4 is in the centre of the clock face and the LED on pin
38
* if a longer hand (and a larger clock face) is desired, pin 4 can be
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.
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.
46
Implementation details:
48
* for a schematic, see ../project/propeller-clock.sch.
50
* the timing of the drawing of the clock face is recalculated with
51
every rotation of the propeller.
53
* a PC fan actually sends 2 tachometer pulses per revolution, so the
54
software skips every other one. This means that the clock may
55
appear upside-down if started with the propeller in the wrong
56
position. You will need to experiment to discover the position that
57
the propeller must be in when starting the clock.
61
* pressing the button cycles between variations of the current
64
* pressing and holding the button for a second cycles between display
65
modes (e.g., analogue and digital).
67
* pressing and holding the button for 5 seconds enters "time set"
68
mode. In this mode, the following applies:
69
- the field that is being set flashes
70
- pressing the button increments the field currently being set
71
- pressing and holding the button for a second cycles through the
72
fields that can be set
73
- pressing and holding the button for 5 seconds sets the time and
60
76
******************************************************************************/
82
#include "modes/analogue_clock.h"
83
#include "modes/digital_clock.h"
84
#include "modes/test_pattern.h"
85
#include "modes/settings_mode.h"
87
#include "text_renderer.h"
65
90
//_____________________________________________________________________________
69
93
// when non-zero, the time (in microseconds) of a new fan pulse that
70
94
// has just occurred, which means that segment drawing needs to be
72
static unsigned long new_pulse_at = 0;
96
static unsigned long _new_pulse_at = 0;
74
98
// the time (in microseconds) when the last fan pulse occurred
75
static unsigned long last_pulse_at = 0;
99
static unsigned long _last_pulse_at = 0;
77
101
// duration (in microseconds) that a segment should be displayed
78
static unsigned long segment_step = 0;
102
static unsigned long _segment_step = 0;
80
104
// remainder after divisor and a tally of the remainders for each segment
81
static unsigned long segment_step_sub_step = 0;
82
static unsigned long segment_step_sub = 0;
84
// flag to indicate that the drawing mode should be cycled to the next one
85
static bool inc_draw_mode = false;
87
// a bounce-managed button
88
static Bounce button( 3, 5 );
91
static int time_hours = 0;
92
static int time_minutes = 0;
93
static int time_seconds = 0;
95
// number of segments in a full display (rotation) is 60 (one per
96
// second) times the desired number of sub-divisions of a second
97
#define NUM_SECOND_SEGMENTS 5
98
#define NUM_SEGMENTS ( 60 * NUM_SECOND_SEGMENTS )
105
static unsigned long _segment_step_sub_step = 0;
106
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
100
122
//_____________________________________________________________________________
104
// check for button presses
110
// notice button presses
111
if( button.risingEdge() )
112
inc_draw_mode = true;
116
// keep track of time
119
// previous time and any carried-over milliseconds
120
static unsigned long last_time = millis();
121
static unsigned long carry = 0;
123
// how many milliseonds have elapsed since we last checked?
124
unsigned long next_time = millis();
125
unsigned long delta = next_time - last_time + carry;
127
// update the previous time and carried-over milliseconds
128
last_time = next_time;
129
carry = delta % 1000;
131
// add the seconds that have passed to the time
132
time_seconds += delta / 1000;
133
while( time_seconds >= 60 ) {
136
if( time_minutes >= 60 ) {
139
if( time_hours >= 24 )
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()
149
_button.set_press_mode( _major_mode != SETTINGS_MODE_IDX );
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;
159
// perform button events
160
void do_button_events()
162
// loop through pending events
163
while( int event = _button.get_event() )
169
switch( _major_mode ) {
171
switch( _minor_mode ) {
172
case ANALOGUE_CLOCK_IDX: analogue_clock_press(); break;
173
case DIGITAL_CLOCK_IDX: digital_clock_press(); break;
176
case SETTINGS_MODE_IDX: settings_mode_press(); break;
182
switch( _major_mode ) {
184
if( ++_minor_mode >= 3 )
186
activate_minor_mode();
188
case SETTINGS_MODE_IDX: settings_mode_long_press(); break;
193
// looooong press (change major mode)
194
if( ++_major_mode > 1 )
196
activate_major_mode();
146
// draw a segment for the test display
147
void drawNextSegment_test( bool reset )
203
// draw a display segment
204
void draw_next_segment( bool reset )
149
206
// keep track of segment
150
static unsigned int segment = 0;
151
if( reset ) segment = 0;
154
// turn on inside and outside LEDs
155
digitalWrite( 4, HIGH );
156
digitalWrite( 13, HIGH );
158
// display segment number in binary across in the inside LEDs,
159
// with the LED on pin 12 showing the least-significant bit
160
for( int a = 0; a < 8; a++ )
161
digitalWrite( 12 - a, ( ( segment >> a ) & 1 )? HIGH : LOW );
165
// draw a segment for the time display
166
void drawNextSegment_time( bool reset )
168
static unsigned int second = 0;
169
static unsigned int segment = 0;
171
// handle display reset
208
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
209
if( reset ) segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
211
static int segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
212
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
215
// reset the text renderer
216
TextRenderer::reset_buffer();
177
// what needs to be drawn?
178
bool draw_tick = !segment && second % 5 == 0;
179
bool draw_second = !segment && second == time_seconds;
180
bool draw_minute = !segment && second == time_minute;
181
bool draw_hour = !segment && second == time_hour;
184
digitalWrite( 13, HIGH );
185
digitalWrite( 12, draw_tick || draw_minute );
186
for( int a = 10; a <= 11; a++ )
187
digitalWrite( a, draw_minute || draw_second );
188
for( int a = 4; a <= 9; a++ )
189
digitalWrite( 10, draw_minute | draw_second || draw_hour );
192
if( ++segment >= NUM_SECOND_SEGMENTS ) {
199
// draw a display segment
200
void drawNextSegment( bool reset )
202
static int draw_mode = 0;
204
// handle mode switch requests
205
if( reset && inc_draw_mode ) {
206
inc_draw_mode = false;
213
switch( draw_mode ) {
214
case 0: drawNextSegment_test( reset ); break;
215
case 1: drawNextSegment_time( reset ); break;
220
switch( _major_mode ) {
222
switch( _minor_mode ) {
223
case ANALOGUE_CLOCK_IDX: analogue_clock_draw_reset(); break;
224
case DIGITAL_CLOCK_IDX: digital_clock_draw_reset(); break;
227
case SETTINGS_MODE_IDX: settings_mode_draw_reset(); break;
230
// tell the text services we're starting a new frame
235
switch( _major_mode ) {
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;
243
case SETTINGS_MODE_IDX: settings_mode_draw( segment ); break;
246
// draw any text that was rendered
247
TextRenderer::output_buffer();
250
if( ++segment >= NUM_SEGMENTS ) segment = 0;
252
if( --segment < 0 ) segment = NUM_SEGMENTS - 1;
220
257
// calculate time constants when a new pulse has occurred
221
void calculateSegmentTimes()
258
void calculate_segment_times()
223
260
// check for overflows, and only recalculate times if there isn't
224
261
// one (if there is, we'll just go with the last pulse's times)
225
if( new_pulse_at > last_pulse_at )
262
if( _new_pulse_at > _last_pulse_at )
227
264
// new segment stepping times
228
unsigned long delta = new_pulse_at - last_pulse_at;
229
segment_step = delta / NUM_SEGMENTS;
230
segment_step_sub = 0;
231
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;
234
271
// now we have dealt with this pulse, save the pulse time and
235
272
// clear new_pulse_at, ready for the next pulse
236
last_pulse_at = new_pulse_at;
273
_last_pulse_at = _new_pulse_at;
241
278
// wait until it is time to draw the next segment or a new pulse has
243
void waitTillNextSegment( bool reset )
280
void wait_till_end_of_segment( bool reset )
245
282
static unsigned long end_time = 0;
249
end_time = last_pulse_at;
286
end_time = _last_pulse_at;
251
288
// work out the time that this segment should be displayed until
252
end_time += segment_step;
253
segment_step_sub += segment_step_sub_step;
254
if( segment_step_sub >= NUM_SEGMENTS ) {
255
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;
260
while( micros() < end_time && !new_pulse_at );
297
while( micros() < end_time && !_new_pulse_at );
264
301
// ISR to handle the pulses from the fan's tachiometer
265
void fanPulseHandler()
302
void fan_pulse_handler()
267
304
// the fan actually sends two pulses per revolution. These pulses
268
305
// may not be exactly evenly distributed around the rotation, so