1
/* -*- mode: c++; compile-command: "BOARD=pro5v make"; -*- */
5
* Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.
4
* Copyright (C) 2011 Tim Marston <edam@waxworlds.org>
7
6
* This file is part of propeller-clock (hereafter referred to as "this
8
* program"). See http://ed.am/dev/software/arduino/propeller-clock for more
7
* program"). See http://ed.am/software/arduino/propeller-clock for more
11
10
* This program is free software: you can redistribute it and/or modify
22
21
* along with this program. If not, see <http://www.gnu.org/licenses/>.
25
/******************************************************************************
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
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 anf 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 analog 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 tachiometer 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 dicsover 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
76
******************************************************************************/
82
#include "mode_switcher.h"
85
24
//_____________________________________________________________________________
101
40
static unsigned long segment_step_sub_step = 0;
102
41
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;
43
// number of segments in a full display (rotation) is 60 (one per
44
// second) times the desired number of sub-divisions of a second
45
#define NUM_SEGMENTS ( 60 * 5 )
107
// a bounce-managed button
108
static Button button( 3 );
110
48
//_____________________________________________________________________________
114
// check for button presses
52
// ISR to handle the pulses from the fan's tachiometer
53
void fanPulseHandler()
118
int event = button.update();
123
inc_draw_mode = true;
55
// the fan actually sends two pulses per revolution. These pulses
56
// may not be exactly evenly distributed around the rotation, so
57
// we can't recalculate times on every pulse. Instead, we ignore
58
// every other pulse so timings are based on a complete rotation.
59
static bool ignore = true;
63
// set a new pulse time
64
new_pulse_at = micros();
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
// draw a display segment
69
// draw a particular segment
145
70
void drawNextSegment( bool reset )
147
static ModeSwitcher mode_switcher;
148
static bool init = false;
152
mode_switcher.activate();
155
// keep track of segment
157
static int segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
158
if( reset ) segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
160
static int segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
161
if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
165
Drawer &drawer = mode_switcher.get_drawer();
166
if( reset ) drawer.draw_reset();
167
drawer.draw( segment );
170
if( ++segment >= NUM_SEGMENTS ) segment = 0;
172
if( --segment < 0 ) segment = NUM_SEGMENTS - 1;
72
static unsigned int segment = 0;
73
if( reset ) segment = 0;
76
for( int a = 0; a < 10; a++ )
77
digitalWrite( a + 4, ( ( segment >> a ) & 1 )? HIGH : LOW );
208
112
// work out the time that this segment should be displayed until
209
113
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;
114
semgment_step_sub += semgment_step_sub_step;
115
if( semgment_step_sub >= NUM_SEGMENTS ) {
116
semgment_step_sub -= NUM_SEGMENTS;
221
// ISR to handle the pulses from the fan's tachiometer
222
void fanPulseHandler()
224
// the fan actually sends two pulses per revolution. These pulses
225
// may not be exactly evenly distributed around the rotation, so
226
// we can't recalculate times on every pulse. Instead, we ignore
227
// every other pulse so timings are based on a complete rotation.
228
static bool ignore = true;
232
// set a new pulse time
233
new_pulse_at = micros();
246
133
for( int a = 4; a < 14; a++ )
247
134
pinMode( a, OUTPUT );
249
// set up mode-switch button on pin 3
251
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
137
Serial.begin( 9600 );
264
144
// if there has been a new pulse, we'll be resetting the display
265
145
bool reset = new_pulse_at? true : false;
267
// only do this stuff at the start of a display cycle, to ensure
268
// that no state changes mid-display
274
// keep track of time
275
Time &time = Time::get_instance();
279
147
// draw this segment
280
148
drawNextSegment( reset );
added
removed
propeller-clock/propeller-clock.pde
