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181 lines
4.9 KiB
C++
181 lines
4.9 KiB
C++
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//
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// IntelligentKeyboard.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 02/11/2019.
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// Copyright © 2019 Thomas Harte. All rights reserved.
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//
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#include "IntelligentKeyboard.hpp"
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using namespace Atari::ST;
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IntelligentKeyboard::IntelligentKeyboard(Serial::Line &input, Serial::Line &output) : output_line_(output) {
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input.set_read_delegate(this, Storage::Time(2, 15625));
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output_line_.set_writer_clock_rate(15625);
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}
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bool IntelligentKeyboard::serial_line_did_produce_bit(Serial::Line *, int bit) {
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// Shift.
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command_ = (command_ >> 1) | (bit << 9);
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// If that's 10 bits, decode a byte and stop.
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bit_count_ = (bit_count_ + 1) % 10;
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if(!bit_count_) {
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dispatch_command(uint8_t(command_ >> 1));
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command_ = 0;
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return false;
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}
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// Continue.
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return true;
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}
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ClockingHint::Preference IntelligentKeyboard::preferred_clocking() {
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return output_line_.transmission_data_time_remaining().as_integral() ? ClockingHint::Preference::RealTime : ClockingHint::Preference::None;
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}
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void IntelligentKeyboard::run_for(HalfCycles duration) {
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output_line_.advance_writer(duration);
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}
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void IntelligentKeyboard::output_byte(uint8_t value) {
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// Wrap the value in a start and stop bit, and send it on its way.
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output_line_.write(2, 10, 0x200 | (value << 1));
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update_clocking_observer();
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}
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void IntelligentKeyboard::dispatch_command(uint8_t command) {
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// Enqueue for parsing.
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command_sequence_.push_back(command);
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// For each possible command, check that the proper number of bytes are present.
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// If not, exit. If so, perform and drop out of the switch.
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switch(command_sequence_.front()) {
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default:
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printf("Unrecognised IKBD command %02x\n", command);
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break;
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case 0x80:
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/*
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Reset: 0x80 0x01.
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"Any byte following an 0x80 command byte other than 0x01 is ignored (and causes the 0x80 to be ignored)."
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*/
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if(command_sequence_.size() != 2) return;
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if(command_sequence_[1] == 0x01) {
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reset();
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}
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break;
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case 0x07:
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if(command_sequence_.size() != 2) return;
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set_mouse_button_actions(command_sequence_[1]);
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break;
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case 0x08:
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set_relative_mouse_position_reporting();
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break;
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case 0x09:
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if(command_sequence_.size() != 5) return;
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set_absolute_mouse_position_reporting(
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uint16_t((command_sequence_[1] << 8) | command_sequence_[2]),
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uint16_t((command_sequence_[3] << 8) | command_sequence_[4])
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);
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break;
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case 0x0a:
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if(command_sequence_.size() != 3) return;
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set_mouse_keycode_reporting(command_sequence_[1], command_sequence_[2]);
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break;
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case 0x0b:
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if(command_sequence_.size() != 3) return;
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set_mouse_threshold(command_sequence_[1], command_sequence_[2]);
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break;
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case 0x0c:
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if(command_sequence_.size() != 3) return;
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set_mouse_scale(command_sequence_[1], command_sequence_[2]);
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break;
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case 0x0d:
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interrogate_mouse_position();
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break;
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case 0x0e:
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if(command_sequence_.size() != 6) return;
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/* command_sequence_[1] has no defined meaning. */
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set_mouse_position(
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uint16_t((command_sequence_[2] << 8) | command_sequence_[3]),
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uint16_t((command_sequence_[4] << 8) | command_sequence_[5])
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);
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break;
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case 0x0f: set_mouse_y_upward(); break;
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case 0x10: set_mouse_y_downward(); break;
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case 0x11: resume(); break;
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case 0x12: disable_mouse(); break;
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case 0x13: pause(); break;
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case 0x1a: disable_joysticks(); break;
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}
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// There was no premature exit, so a complete command sequence must have been satisfied.
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command_sequence_.clear();
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}
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void IntelligentKeyboard::reset() {
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// Reset should perform a self test, lasting at most 200ms, then post 0xf0.
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// Following that it should look for any keys that currently seem to be pressed.
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// Those are considered stuck and a break code is generated for them.
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output_byte(0xf0);
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}
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void IntelligentKeyboard::resume() {
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}
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void IntelligentKeyboard::pause() {
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}
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void IntelligentKeyboard::disable_mouse() {
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}
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void IntelligentKeyboard::set_relative_mouse_position_reporting() {
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}
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void IntelligentKeyboard::set_absolute_mouse_position_reporting(uint16_t max_x, uint16_t max_y) {
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}
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void IntelligentKeyboard::set_mouse_position(uint16_t x, uint16_t y) {
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}
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void IntelligentKeyboard::set_mouse_keycode_reporting(uint8_t delta_x, uint8_t delta_y) {
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}
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void IntelligentKeyboard::set_mouse_threshold(uint8_t x, uint8_t y) {
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}
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void IntelligentKeyboard::set_mouse_scale(uint8_t x, uint8_t y) {
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}
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void IntelligentKeyboard::set_mouse_y_downward() {
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}
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void IntelligentKeyboard::set_mouse_y_upward() {
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}
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void IntelligentKeyboard::set_mouse_button_actions(uint8_t actions) {
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}
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void IntelligentKeyboard::interrogate_mouse_position() {
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output_byte(0xf7); // Beginning of mouse response.
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output_byte(0x00); // 0000dcba; a = right button down since last interrogation, b = right button up since, c/d = left button.
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output_byte(0x00); // x motion: MSB, LSB
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output_byte(0x00);
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output_byte(0x00); // y motion: MSB, LSB
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output_byte(0x00);
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}
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void IntelligentKeyboard::disable_joysticks() {
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}
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