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Continued the baby steps.

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This commit is contained in:
Thomas Harte 2016-12-24 21:54:43 -05:00
parent afc6f4129c
commit 7f303cfceb
1 changed files with 27 additions and 11 deletions
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38
Storage/Disk/DiskController.cpp
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@ -53,17 +53,25 @@ void Controller::run_for_cycles(int number_of_cycles)
if(drive_ && drive_->has_disk() && motor_is_on_)
{
if(!track_) setup_track();
number_of_cycles *= clock_rate_multiplier_;
while(number_of_cycles)
if(is_reading_)
{
int cycles_until_next_event = (int)get_cycles_until_next_event();
int cycles_to_run_for = std::min(cycles_until_next_event, number_of_cycles);
number_of_cycles *= clock_rate_multiplier_;
while(number_of_cycles)
{
int cycles_until_next_event = (int)get_cycles_until_next_event();
int cycles_to_run_for = std::min(cycles_until_next_event, number_of_cycles);
cycles_since_index_hole_ += (unsigned int)cycles_to_run_for;
cycles_since_index_hole_ += (unsigned int)cycles_to_run_for;
number_of_cycles -= cycles_to_run_for;
pll_->run_for_cycles(cycles_to_run_for);
TimedEventLoop::run_for_cycles(cycles_to_run_for);
number_of_cycles -= cycles_to_run_for;
pll_->run_for_cycles(cycles_to_run_for);
TimedEventLoop::run_for_cycles(cycles_to_run_for);
}
}
else
{
// TODO
}
}
}
@ -81,8 +89,8 @@ void Controller::get_next_event(const Time &duration_already_passed)
current_event_.type = Track::Event::IndexHole;
}
// divide interval, which is in terms of a rotation of the disk, by rotation speed, and
// convert it into revolutions per second
// divide interval, which is in terms of a single rotation of the disk, by rotation speed to
// convert it into revolutions per second; this is achieved by multiplying by rotational_multiplier_
set_next_event_time_interval((current_event_.length - duration_already_passed) * rotational_multiplier_);
}
@ -115,19 +123,27 @@ Storage::Time Controller::get_time_into_track()
void Controller::begin_writing()
{
is_reading_ = false;
write_segment_.length_of_a_bit = bit_length_ * rotational_multiplier_;
write_segment_.data.clear();
write_segment_.number_of_bits = 0;
// write_start_time_;
write_start_time_ = get_time_into_track();
}
void Controller::write_bit(bool value)
{
bool needs_new_byte = !(write_segment_.number_of_bits&7);
if(needs_new_byte) write_segment_.data.push_back(0);
if(value) write_segment_.data[write_segment_.number_of_bits >> 3] |= 0x80 >> (write_segment_.number_of_bits & 7);
write_segment_.number_of_bits++;
}
void Controller::end_writing()
{
is_reading_ = true;
// TODO
}
#pragma mark - PLL control and delegate