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******************************************************************************/
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#include "modes/switcher_major_mode.h"
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#include "modes/settings_major_mode.h"
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#include "modes/analogue_clock_mode.h"
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#include "modes/digital_clock_mode.h"
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#include "modes/info_mode.h"
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#include "modes/test_pattern_mode.h"
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#include "text_renderer.h"
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//_____________________________________________________________________________
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// when non-zero, the time (in microseconds) of a new fan pulse that
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// has just occurred, which means that segment drawing needs to be
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static unsigned long new_pulse_at = 0;
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static unsigned long _new_pulse_at = 0;
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// the time (in microseconds) when the last fan pulse occurred
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static unsigned long last_pulse_at = 0;
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static unsigned long _last_pulse_at = 0;
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// duration (in microseconds) that a segment should be displayed
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static unsigned long segment_step = 0;
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static unsigned long _segment_step = 0;
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// remainder after divisor and a tally of the remainders for each segment
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static unsigned long segment_step_sub_step = 0;
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static unsigned long segment_step_sub = 0;
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// flag to indicate that the drawing mode should be cycled to the next one
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static bool inc_draw_mode = false;
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// a bounce-managed button
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static Bounce button( 3, 5 );
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static int time_hours = 0;
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static int time_minutes = 0;
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static int time_seconds = 0;
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// number of segments in a full display (rotation) is 60 (one per
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// second) times the desired number of sub-divisions of a second
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#define NUM_SECOND_SEGMENTS 5
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#define NUM_SEGMENTS ( 60 * NUM_SECOND_SEGMENTS )
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static unsigned long _segment_step_sub_step = 0;
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static unsigned long _segment_step_sub = 0;
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static Button _button( 3 );
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static MajorMode *_modes[ 3 ];
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// current major mode
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static int _mode = 0;
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// interupt handler's "ignore every other" flag
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static bool _pulse_ignore = true;
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//_____________________________________________________________________________
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// check for button presses
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// notice button presses
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if( button.risingEdge() )
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inc_draw_mode = true;
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// keep track of time
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// previous time and any carried-over milliseconds
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static unsigned long last_time = millis();
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static unsigned long carry = 0;
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// how many milliseonds have elapsed since we last checked?
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unsigned long next_time = millis();
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unsigned long delta = next_time - last_time + carry;
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// update the previous time and carried-over milliseconds
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last_time = next_time;
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carry = delta % 1000;
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// add the seconds that have passed to the time
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time_seconds += delta / 1000;
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while( time_seconds >= 60 ) {
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if( time_minutes >= 60 ) {
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if( time_hours >= 24 )
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// perform button events
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void do_button_events()
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// loop through pending events
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while( int event = _button.get_event() )
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_modes[ _mode ]->press();
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_modes[ _mode ]->long_press();
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// looooong press (change major mode)
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_modes[ _mode ]->deactivate();
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if( !_modes[ ++_mode ] ) _mode = 0;
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_modes[ _mode ]->activate();
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// switch display upside-down
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_pulse_ignore = !_pulse_ignore;
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// draw a segment for the test display
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void drawNextSegment_test( bool reset )
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// draw a display segment
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void draw_next_segment( bool reset )
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// keep track of segment
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static unsigned int segment = 0;
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if( reset ) segment = 0;
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// turn on inside and outside LEDs
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digitalWrite( 4, HIGH );
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digitalWrite( 13, HIGH );
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// display segment number in binary across in the inside LEDs,
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// with the LED on pin 12 showing the least-significant bit
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for( int a = 0; a < 8; a++ )
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digitalWrite( 12 - a, ( ( segment >> a ) & 1 )? HIGH : LOW );
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// draw a segment for the time display
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void drawNextSegment_time( bool reset )
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static unsigned int second = 0;
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static unsigned int segment = 0;
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// handle display reset
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// what needs to be drawn?
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bool draw_tick = !segment && second % 5 == 0;
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bool draw_second = !segment && second == time_seconds;
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bool draw_minute = !segment && second == time_minutes;
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bool draw_hour = !segment && second == time_hours;
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digitalWrite( 13, HIGH );
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digitalWrite( 12, draw_tick || draw_minute );
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for( int a = 10; a <= 11; a++ )
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digitalWrite( a, draw_minute || draw_second );
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for( int a = 4; a <= 9; a++ )
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digitalWrite( 10, draw_minute | draw_second || draw_hour );
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if( ++segment >= NUM_SECOND_SEGMENTS ) {
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// draw a display segment
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void drawNextSegment( bool reset )
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static int draw_mode = 0;
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// handle mode switch requests
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if( reset && inc_draw_mode ) {
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inc_draw_mode = false;
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switch( draw_mode ) {
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case 0: drawNextSegment_test( reset ); break;
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case 1: drawNextSegment_time( reset ); break;
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static int segment = 0;
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if( reset ) segment = ( NUM_SEGMENTS - CLOCK_SHIFT ) % NUM_SEGMENTS;
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if( reset ) segment = NUM_SEGMENTS - 1 - CLOCK_SHIFT;
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// reset the text renderer's buffer
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TextRenderer::reset_buffer();
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_modes[ _mode ]->draw_reset();
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// tell the text services we're starting a new frame
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_modes[ _mode ]->draw( segment );
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Text::draw( segment );
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// draw text rednerer's buffer
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TextRenderer::output_buffer();
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if( ++segment >= NUM_SEGMENTS ) segment = 0;
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if( --segment < 0 ) segment = NUM_SEGMENTS - 1;
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// calculate time constants when a new pulse has occurred
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void calculateSegmentTimes()
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void calculate_segment_times()
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// check for overflows, and only recalculate times if there isn't
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// one (if there is, we'll just go with the last pulse's times)
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if( new_pulse_at > last_pulse_at )
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if( _new_pulse_at > _last_pulse_at )
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// new segment stepping times
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unsigned long delta = new_pulse_at - last_pulse_at;
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segment_step = delta / NUM_SEGMENTS;
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segment_step_sub = 0;
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segment_step_sub_step = delta % NUM_SEGMENTS;
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unsigned long delta = _new_pulse_at - _last_pulse_at;
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_segment_step = delta / NUM_SEGMENTS;
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_segment_step_sub = 0;
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_segment_step_sub_step = delta % NUM_SEGMENTS;
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// now we have dealt with this pulse, save the pulse time and
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// clear new_pulse_at, ready for the next pulse
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last_pulse_at = new_pulse_at;
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_last_pulse_at = _new_pulse_at;
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// wait until it is time to draw the next segment or a new pulse has
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void waitTillNextSegment( bool reset )
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void wait_till_end_of_segment( bool reset )
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static unsigned long end_time = 0;
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end_time = last_pulse_at;
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end_time = _last_pulse_at;
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// work out the time that this segment should be displayed until
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end_time += segment_step;
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segment_step_sub += segment_step_sub_step;
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if( segment_step_sub >= NUM_SEGMENTS ) {
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segment_step_sub -= NUM_SEGMENTS;
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end_time += _segment_step;
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_segment_step_sub += _segment_step_sub_step;
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if( _segment_step_sub >= NUM_SEGMENTS ) {
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_segment_step_sub -= NUM_SEGMENTS;
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while( micros() < end_time && !new_pulse_at );
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while( micros() < end_time && !_new_pulse_at );
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// ISR to handle the pulses from the fan's tachiometer
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void fanPulseHandler()
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// ISR to handle the pulses from the fan's tachometer
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void fan_pulse_handler()
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// the fan actually sends two pulses per revolution. These pulses
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// may not be exactly evenly distributed around the rotation, so
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// we can't recalculate times on every pulse. Instead, we ignore
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// every other pulse so timings are based on a complete rotation.
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static bool ignore = true;
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_pulse_ignore = !_pulse_ignore;
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// set a new pulse time
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new_pulse_at = micros();
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_new_pulse_at = micros();