portapack-mayhem/firmware/application/apps/ui_keyfob.cpp

262 lines
6.1 KiB
C++

/*
* 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 */