mirror of
https://github.com/dingusdev/dingusppc.git
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d08b486db0
AdbKeyboard would copy the event into its own fields and set the changed field, so that we could return the event when register was 0. However, if a subsequent event was received before ADB polling, the previous event would be overwritten and lost. Fix this by maintaining a queue of events, so that we can return everything since the last poll.
118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file Apple Desktop Bus Keyboard emulation. */
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#include <devices/common/adb/adbkeyboard.h>
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#include <devices/common/adb/adbbus.h>
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#include <devices/deviceregistry.h>
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#include <core/hostevents.h>
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#include <loguru.hpp>
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AdbKeyboard::AdbKeyboard(std::string name) : AdbDevice(name) {
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EventManager::get_instance()->add_keyboard_handler(this, &AdbKeyboard::event_handler);
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this->reset();
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}
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void AdbKeyboard::event_handler(const KeyboardEvent& event) {
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this->pending_events.push_back(std::make_unique<KeyboardEvent>(event));
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}
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void AdbKeyboard::reset() {
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this->my_addr = ADB_ADDR_KBD;
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this->dev_handler_id = 2; // Extended ADB keyboard
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this->exc_event_flag = 1;
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this->srq_flag = 1; // enable service requests
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this->pending_events.clear();
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}
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bool AdbKeyboard::get_register_0() {
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if (this->pending_events.empty()) {
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return false;
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}
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uint8_t* out_buf = this->host_obj->get_output_buf();
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out_buf[0] = this->consume_pending_event();
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out_buf[1] = this->consume_pending_event();
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this->host_obj->set_output_count(2);
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return true;
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}
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uint8_t AdbKeyboard::consume_pending_event() {
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if (this->pending_events.empty()) {
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// In most cases we have only on pending event when the host polls us,
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// but we need to fill two entries of the output buffer. We need to set
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// the key status bit to 1 (released), and the key to a non-existent
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// one (0x7F). Otherwise if we leave it empty, the host will think that
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// the 'a' key (code 0) is pressed (status 0).
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return 0xFF;
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}
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std::unique_ptr<KeyboardEvent> event = std::move(this->pending_events.front());
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this->pending_events.pop_front();
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uint8_t key_state = 0;
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if (event->flags & KEYBOARD_EVENT_DOWN) {
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key_state = 0;
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} else if (event->flags & KEYBOARD_EVENT_UP) {
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key_state = 1;
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} else {
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LOG_F(WARNING, "%s: unknown keyboard event flags %x", this->name.c_str(), event->flags);
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}
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return (key_state << 7) | (event->key & 0x7F);
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}
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void AdbKeyboard::set_register_2() {
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}
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void AdbKeyboard::set_register_3() {
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if (this->host_obj->get_input_count() < 2) // ensure we got enough data
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return;
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const uint8_t* in_data = this->host_obj->get_input_buf();
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switch (in_data[1]) {
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case 0:
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this->my_addr = in_data[0] & 0xF;
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this->srq_flag = !!(in_data[0] & 0x20);
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break;
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case 1:
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case 2:
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this->dev_handler_id = in_data[1];
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break;
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case 3: // extended keyboard protocol isn't supported yet
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break;
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case 0xFE: // move to a new address if there was no collision
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if (!this->got_collision) {
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this->my_addr = in_data[0] & 0xF;
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}
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break;
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default:
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LOG_F(WARNING, "%s: unknown handler ID = 0x%X", this->name.c_str(), in_data[1]);
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}
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}
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static const DeviceDescription AdbKeyboard_Descriptor = {
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AdbKeyboard::create, {}, {}
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};
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REGISTER_DEVICE(AdbKeyboard, AdbKeyboard_Descriptor);
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