/* * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc. * Copyright (C) 2017 Furrtek * * This file is part of PortaPack. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, * Boston, MA 02110-1301, USA. */ #include "ui_keyfob.hpp" #include "baseband_api.hpp" #include "cpld_update.hpp" #include "string_format.hpp" using namespace portapack; namespace ui { uint8_t KeyfobView::subaru_get_checksum() { uint8_t checksum = 0; for (size_t i = 0; i < 9; i++) { checksum ^= (frame[i] & 0x0F); // 00 11 22 33 44 55 66 77 88 9- checksum ^= ((frame[i] >> 4) & 0x0F); } checksum ^= ((frame[9] >> 4) & 0x0F); checksum++; checksum &= 0x0F; return checksum; } bool KeyfobView::subaru_is_valid() { if (frame[0] != 0x55) return false; if (subaru_get_checksum() != (frame[9] & 0x0F)) return false; return true; } uint16_t KeyfobView::subaru_get_code() { // 77777777 88888888 9999 return (frame[7] << 12) | (frame[8] << 4) | (frame[9] >> 4); } void KeyfobView::subaru_set_code(const uint16_t code) { frame[7] = (code >> 12) & 0xFF; frame[8] = (code >> 4) & 0xFF; frame[9] &= 0x0F; frame[9] |= (code & 0x0F) << 4; } int32_t KeyfobView::subaru_get_command() { uint32_t command_a = frame[5] & 0x0F; uint32_t command_b = frame[6] & 0x0F; if (command_a != command_b) return -1; return command_a; } void KeyfobView::subaru_set_command(const uint32_t command) { frame[5] &= 0xF0; frame[5] |= command; frame[6] &= 0xF0; frame[6] |= command; } void KeyfobView::generate_payload(size_t& bitstream_length) { for (size_t i = 0; i < (10 * 8); i++) { if (frame[i >> 3] & (1 << (7 - (i & 7)))) bitstream_append(bitstream_length, 2, 0b10); else bitstream_append(bitstream_length, 2, 0b01); } } size_t KeyfobView::generate_frame() { size_t bitstream_length = 0; uint64_t payload; // Symfield word to frame payload = field_payload_a.value_hex_u64(); for (size_t i = 0; i < 5; i++) { frame[4 - i] = payload & 0xFF; payload >>= 8; } payload = field_payload_b.value_hex_u64(); for (size_t i = 0; i < 5; i++) { frame[9 - i] = payload & 0xFF; payload >>= 8; } // Recompute checksum frame[9] = (frame[9] & 0xF0) | subaru_get_checksum(); update_symfields(); // Preamble: 128x 01 for (size_t i = 0; i < 128; i++) bitstream_append(bitstream_length, 2, 0b01); // Space: 4x 0 bitstream_append(bitstream_length, 4, 0b0000); // Payload generate_payload(bitstream_length); // Space: 8x 0 bitstream_append(bitstream_length, 8, 0b00000000); // Payload again generate_payload(bitstream_length); return bitstream_length; } void KeyfobView::focus() { options_make.focus(); } KeyfobView::~KeyfobView() { // save app settings settings.save("tx_keyfob", &app_settings); transmitter_model.disable(); hackrf::cpld::load_sram_no_verify(); // to leave all RX ok, without ghost signal problem at the exit . baseband::shutdown(); // better this function at the end, not load_sram() that sometimes produces hang up. } void KeyfobView::update_progress(const uint32_t progress) { text_status.set("Repeat #" + to_string_dec_uint(progress)); } void KeyfobView::on_tx_progress(const uint32_t progress, const bool done) { if (!done) { // Repeating... update_progress(progress + 1); progressbar.set_value(progress); } else { transmitter_model.disable(); text_status.set("Done"); progressbar.set_value(0); tx_view.set_transmitting(false); } } void KeyfobView::on_make_change(size_t index) { (void)index; } // DEBUG void KeyfobView::update_symfields() { for (size_t i = 0; i < 5; i++) { field_payload_a.set_sym(i << 1, frame[i] >> 4); field_payload_a.set_sym((i << 1) + 1, frame[i] & 0x0F); } for (size_t i = 0; i < 5; i++) { field_payload_b.set_sym(i << 1, frame[5 + i] >> 4); field_payload_b.set_sym((i << 1) + 1, frame[5 + i] & 0x0F); } } void KeyfobView::on_command_change(uint32_t value) { subaru_set_command(value); update_symfields(); } void KeyfobView::start_tx() { progressbar.set_max(repeats - 1); update_progress(1); size_t bitstream_length = generate_frame(); transmitter_model.set_sampling_rate(OOK_SAMPLERATE); transmitter_model.set_baseband_bandwidth(1750000); transmitter_model.enable(); baseband::set_ook_data( bitstream_length, subaru_samples_per_bit, repeats, 200 // Pause symbols ); } KeyfobView::KeyfobView( NavigationView& nav ) : nav_ { nav } { baseband::run_image(portapack::spi_flash::image_tag_ook); add_children({ &labels, &options_make, &options_command, &field_payload_a, &field_payload_b, &text_status, &progressbar, &tx_view }); // load app settings auto rc = settings.load("tx_keyfob", &app_settings); if(rc == SETTINGS_OK) { transmitter_model.set_rf_amp(app_settings.tx_amp); transmitter_model.set_tx_gain(app_settings.tx_gain); } frame[0] = 0x55; update_symfields(); options_make.on_change = [this](size_t index, int32_t) { on_make_change(index); }; options_command.on_change = [this](size_t, int32_t value) { on_command_change(value); }; options_make.set_selected_index(0); transmitter_model.set_tuning_frequency(433920000); // Fixed 433.92MHz tx_view.on_edit_frequency = [this, &nav]() { auto new_view = nav.push<FrequencyKeypadView>(transmitter_model.tuning_frequency()); new_view->on_changed = [this](rf::Frequency f) { transmitter_model.set_tuning_frequency(f); }; }; tx_view.on_start = [this]() { start_tx(); tx_view.set_transmitting(true); }; tx_view.on_stop = [this]() { tx_view.set_transmitting(false); }; } } /* namespace ui */