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 (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
60
76
******************************************************************************/
82
#include "mode_switcher.h"
65
85
//_____________________________________________________________________________
85
105
static bool inc_draw_mode = false;
87
107
// 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 )
108
static Button button( 3 );
100
110
//_____________________________________________________________________________
105
115
void checkButtons()
107
117
// update buttons
118
int event = button.update();
110
// notice button presses
111
if( button.risingEdge() )
112
123
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 )
146
// draw a segment for the test display
147
void drawNextSegment_test( bool reset )
149
// 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
177
// what needs to be drawn?
178
bool draw_tick = second % 5 == 0;
179
bool draw_second = second == time_seconds;
180
bool draw_minute = second == time_minute;
181
bool draw_hour = 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 ) {
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 );
199
144
// draw a display segment
200
145
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;
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;