mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 12:08:40 +00:00
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2016 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 "modems.hpp"
|
|
#include "serializer.hpp"
|
|
|
|
#include "portapack_persistent_memory.hpp"
|
|
|
|
using namespace portapack;
|
|
|
|
namespace modems {
|
|
|
|
void generate_data(const std::string& in_message, uint16_t * out_data) {
|
|
serial_format_t serial_format;
|
|
uint8_t parity_init, parity, data_bits, bits, bit, cur_byte;
|
|
uint16_t ordered_word, bytes;
|
|
|
|
serial_format = persistent_memory::serial_format();
|
|
|
|
if (serial_format.parity == ODD)
|
|
parity_init = 1;
|
|
else
|
|
parity_init = 0;
|
|
|
|
data_bits = serial_format.data_bits;
|
|
|
|
for (bytes = 0; bytes < in_message.length(); bytes++) {
|
|
parity = parity_init;
|
|
cur_byte = in_message[bytes];
|
|
bit = 0;
|
|
|
|
if (serial_format.bit_order == MSB_FIRST) {
|
|
ordered_word = cur_byte;
|
|
for (bits = 0; bits < data_bits; bits++) {
|
|
bit = (cur_byte >> bits) & 1; // Get LSB
|
|
parity += bit;
|
|
}
|
|
} else {
|
|
ordered_word = 0;
|
|
for (bits = 0; bits < data_bits; bits++) {
|
|
bit = (cur_byte >> bits) & 1; // Get LSB
|
|
parity += bit;
|
|
ordered_word |= (bit << ((data_bits - 1) - bits)); // Set MSB
|
|
}
|
|
}
|
|
|
|
if (serial_format.parity) {
|
|
ordered_word <<= 1;
|
|
ordered_word |= (parity & 1);
|
|
}
|
|
|
|
for (bits = 0; bits < serial_format.stop_bits; bits++) {
|
|
ordered_word <<= 1;
|
|
ordered_word |= 1;
|
|
}
|
|
|
|
out_data[bytes] = ordered_word;
|
|
}
|
|
|
|
out_data[bytes] = 0; // End marker
|
|
}
|
|
|
|
} /* namespace modems */
|