mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-27 01:31:42 +00:00
74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
//
|
|
// TimedEventLoop.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 29/07/2016.
|
|
// Copyright © 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "TimedEventLoop.hpp"
|
|
#include "../NumberTheory/Factors.hpp"
|
|
#include <algorithm>
|
|
|
|
using namespace Storage;
|
|
|
|
TimedEventLoop::TimedEventLoop(unsigned int input_clock_rate) :
|
|
_input_clock_rate(input_clock_rate) {}
|
|
|
|
void TimedEventLoop::run_for_cycles(int number_of_cycles)
|
|
{
|
|
_cycles_until_event -= number_of_cycles;
|
|
while(_cycles_until_event <= 0)
|
|
{
|
|
process_next_event();
|
|
}
|
|
}
|
|
|
|
unsigned int TimedEventLoop::get_cycles_until_next_event()
|
|
{
|
|
return (unsigned int)std::max(_cycles_until_event, 0);
|
|
}
|
|
|
|
void TimedEventLoop::reset_timer()
|
|
{
|
|
_error.set_zero();
|
|
_cycles_until_event = 0;
|
|
}
|
|
|
|
void TimedEventLoop::reset_timer_to_offset(Time offset)
|
|
{
|
|
/* unsigned int common_clock_rate = NumberTheory::least_common_multiple(offset.clock_rate, _event_interval.clock_rate);
|
|
_time_into_interval = offset.length * (common_clock_rate / offset.clock_rate);
|
|
_event_interval.length *= common_clock_rate / _event_interval.clock_rate;
|
|
_event_interval.clock_rate = common_clock_rate;
|
|
if(common_clock_rate != _stepper->get_output_rate())
|
|
{
|
|
_stepper.reset(new SignalProcessing::Stepper(_event_interval.clock_rate, _input_clock_rate));
|
|
}*/
|
|
}
|
|
|
|
void TimedEventLoop::jump_to_next_event()
|
|
{
|
|
reset_timer();
|
|
process_next_event();
|
|
}
|
|
|
|
void TimedEventLoop::set_next_event_time_interval(Time interval)
|
|
{
|
|
unsigned int common_divisor = NumberTheory::greatest_common_divisor(_error.clock_rate, interval.clock_rate);
|
|
uint64_t denominator = (interval.clock_rate * _error.clock_rate) / common_divisor;
|
|
uint64_t numerator = (_error.clock_rate / common_divisor) * _input_clock_rate * interval.length - (interval.clock_rate / common_divisor) * _error.length;
|
|
|
|
_cycles_until_event = (int)(numerator / denominator);
|
|
_error.length = (unsigned int)(numerator % denominator);
|
|
_error.clock_rate = (unsigned int)denominator;
|
|
_error.simplify();
|
|
}
|
|
|
|
Time TimedEventLoop::get_time_into_next_event()
|
|
{
|
|
Time result = _event_interval;
|
|
// result.length = _time_into_interval;
|
|
return result;
|
|
}
|