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https://github.com/eried/portapack-mayhem.git
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243 lines
6.0 KiB
C++
243 lines
6.0 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2017 Furrtek
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*
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* This file is part of PortaPack.
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*
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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 2, or (at your option)
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* any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "ui_keyfob.hpp"
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#include "baseband_api.hpp"
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#include "string_format.hpp"
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using namespace portapack;
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namespace ui {
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uint8_t KeyfobView::subaru_get_checksum() {
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uint8_t checksum = 0;
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for (size_t i = 0; i < 9; i++) {
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checksum ^= (frame[i] & 0x0F); // 00 11 22 33 44 55 66 77 88 9-
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checksum ^= ((frame[i] >> 4) & 0x0F);
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}
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checksum ^= ((frame[9] >> 4) & 0x0F);
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checksum++;
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checksum &= 0x0F;
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return checksum;
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}
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bool KeyfobView::subaru_is_valid() {
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if (frame[0] != 0x55)
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return false;
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if (subaru_get_checksum() != (frame[9] & 0x0F))
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return false;
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return true;
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}
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uint16_t KeyfobView::subaru_get_code() {
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// 77777777 88888888 9999
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return (frame[7] << 12) | (frame[8] << 4) | (frame[9] >> 4);
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}
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void KeyfobView::subaru_set_code(const uint16_t code) {
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frame[7] = (code >> 12) & 0xFF;
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frame[8] = (code >> 4) & 0xFF;
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frame[9] &= 0x0F;
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frame[9] |= (code & 0x0F) << 4;
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}
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int32_t KeyfobView::subaru_get_command() {
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uint32_t command_a = frame[5] & 0x0F;
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uint32_t command_b = frame[6] & 0x0F;
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if (command_a != command_b)
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return -1;
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return command_a;
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}
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void KeyfobView::subaru_set_command(const uint32_t command) {
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frame[5] &= 0xF0;
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frame[5] |= command;
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frame[6] &= 0xF0;
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frame[6] |= command;
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}
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void KeyfobView::generate_payload(size_t& bitstream_length) {
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for (size_t i = 0; i < (10 * 8); i++) {
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if (frame[i >> 3] & (1 << (7 - (i & 7))))
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bitstream_append(bitstream_length, 2, 0b10);
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else
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bitstream_append(bitstream_length, 2, 0b01);
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}
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}
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size_t KeyfobView::generate_frame() {
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size_t bitstream_length = 0;
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uint64_t payload;
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// Symfield word to frame
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payload = field_payload_a.to_integer();
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for (size_t i = 0; i < 5; i++) {
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frame[4 - i] = payload & 0xFF;
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payload >>= 8;
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}
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payload = field_payload_b.to_integer();
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for (size_t i = 0; i < 5; i++) {
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frame[9 - i] = payload & 0xFF;
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payload >>= 8;
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}
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// Recompute checksum
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frame[9] = (frame[9] & 0xF0) | subaru_get_checksum();
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update_symfields();
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// Preamble: 128x 01
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for (size_t i = 0; i < 128; i++)
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bitstream_append(bitstream_length, 2, 0b01);
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// Space: 4x 0
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bitstream_append(bitstream_length, 4, 0b0000);
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// Payload
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generate_payload(bitstream_length);
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// Space: 8x 0
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bitstream_append(bitstream_length, 8, 0b00000000);
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// Payload again
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generate_payload(bitstream_length);
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return bitstream_length;
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}
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void KeyfobView::focus() {
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options_make.focus();
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}
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KeyfobView::~KeyfobView() {
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transmitter_model.disable();
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baseband::shutdown();
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}
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void KeyfobView::update_progress(const uint32_t progress) {
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text_status.set("Repeat #" + to_string_dec_uint(progress));
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}
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void KeyfobView::on_tx_progress(const uint32_t progress, const bool done) {
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if (!done) {
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// Repeating...
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update_progress(progress + 1);
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progressbar.set_value(progress);
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} else {
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transmitter_model.disable();
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text_status.set("Done");
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progressbar.set_value(0);
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tx_view.set_transmitting(false);
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}
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}
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void KeyfobView::on_make_change(size_t index) {
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(void)index;
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}
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// DEBUG
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void KeyfobView::update_symfields() {
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for (size_t i = 0; i < 5; i++) {
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field_payload_a.set_offset(i << 1, frame[i] >> 4);
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field_payload_a.set_offset((i << 1) + 1, frame[i] & 0x0F);
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}
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for (size_t i = 0; i < 5; i++) {
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field_payload_b.set_offset(i << 1, frame[5 + i] >> 4);
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field_payload_b.set_offset((i << 1) + 1, frame[5 + i] & 0x0F);
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}
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}
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void KeyfobView::on_command_change(uint32_t value) {
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subaru_set_command(value);
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update_symfields();
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}
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void KeyfobView::start_tx() {
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progressbar.set_max(repeats - 1);
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update_progress(1);
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size_t bitstream_length = generate_frame();
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transmitter_model.enable();
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baseband::set_ook_data(
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bitstream_length,
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subaru_samples_per_bit,
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repeats,
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200 // Pause symbols
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);
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}
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KeyfobView::KeyfobView(
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NavigationView& nav)
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: nav_{nav} {
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baseband::run_image(portapack::spi_flash::image_tag_ook);
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add_children({&labels,
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&options_make,
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&options_command,
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&field_payload_a,
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&field_payload_b,
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&text_status,
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&progressbar,
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&tx_view});
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frame[0] = 0x55;
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update_symfields();
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options_make.on_change = [this](size_t index, int32_t) {
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on_make_change(index);
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};
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options_command.on_change = [this](size_t, int32_t value) {
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on_command_change(value);
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};
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options_make.set_selected_index(0);
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tx_view.on_edit_frequency = [this, &nav]() {
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auto new_view = nav.push<FrequencyKeypadView>(transmitter_model.target_frequency());
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new_view->on_changed = [this](rf::Frequency f) {
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transmitter_model.set_target_frequency(f);
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};
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};
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tx_view.on_start = [this]() {
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start_tx();
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tx_view.set_transmitting(true);
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};
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tx_view.on_stop = [this]() {
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tx_view.set_transmitting(false);
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};
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}
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} /* namespace ui */
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