mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2026-08-16 12:53:25 +00:00
Sarah Rose
bf5ea0a004
* Add KISS TNC external app for APRS RX/TX over USB serial Adds a KISS TNC (Terminal Node Controller) app that bridges APRS packets between the HackRF radio and a connected PC over USB CDC serial using the KISS protocol. Features: - APRS receive at 144.390 MHz (configurable), decoding packets via the existing APRS RX baseband (PAPR.bin) - Received AX.25 frames forwarded to host as KISS-framed data over USB serial - KISS frames received from host transmitted as AFSK audio using the existing AFSK TX baseband (PAFT.bin) - Clean RX->TX->RX baseband switching with proper timing delays - USB connection status indicator with periodic refresh - Compatible with standard KISS TNC clients (Xastir, APRSISCE/32, Dire Wolf, etc.) Firmware changes required to support the external app: - baseband_api.cpp: mark set_aprs() __attribute__((used)) so it is retained by the linker for external app use - protocols/ax25: add make_frame_from_raw() to build NRZI bitstream from raw AX.25 bytes, marked __attribute__((used)) - usb_serial_host_to_device: add kiss_raw_handler hook to route incoming USB bytes directly to a registered callback, bypassing the shell; marked __attribute__((used)) - baseband/proc_aprsrx: add constructor that auto-configures at 1200 baud so external apps do not need to call set_aprs() at init * Address PR review: generic RAII USB handler, fix TX cutoff and buffer overflow - Replace KISS-specific set_kiss_raw_handler() in shared USB code with a generic UsbSerialInputHandler RAII class; any app can now register a handler via the ctor and it auto-clears in the dtor — no app-specific 'if' checks in shared code, no __attribute__((used)) needed - Remove __attribute__((used)) from set_aprs() — it is referenced directly by ui_aprs_rx.cpp so it will never be dead-stripped - Fix send_kiss_frame() buffer overflow: per-byte bounds check prevents 2-byte escape sequences from writing past the end of the output buffer - Replace fillOBuffer(TIME_INFINITE) with chOQWriteTimeout(TIME_IMMEDIATE) to drop bytes instead of blocking the event loop - Remove chThdSleepMilliseconds() calls from start_tx() and finish_tx() - Fix TX cutoff bug: call start_tx() directly from process_kiss_frame() instead of deferring via tx_pending_ flag (deferral caused kiss_idx_ to be 0 by the time start_tx() fired, producing an empty frame) * Move USB write into UsbSerialInputHandler class Add a write() method to UsbSerialInputHandler so all USB I/O (both input callback and output) is encapsulated in the class. KISS TNC now uses usb_input_handler_->write() instead of calling chOQWriteTimeout(&SUSBD1.oqueue, ...) directly, keeping raw USB details out of app code. * Address PR review: remove auto-configure from APRSRxProcessor, add timeout param to write() - Remove default_config from APRSRxProcessor() constructor; baseband should start unconfigured and wait for APRSRxConfigureMessage from the app side (already sent via baseband::set_aprs() in KISS TNC and APRS RX app) - Remove stray #include "stdio.h" from proc_aprsrx.cpp - Add systime_t timeout parameter with default TIME_IMMEDIATE to UsbSerialInputHandler::write() so callers can choose blocking behaviour
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* Copyright (C) 2014 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 "crc.hpp"
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#include <cstring>
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#include <string>
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#ifndef __AX25_H__
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#define __AX25_H__
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#define AX25_FLAG 0x7E
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namespace ax25 {
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enum protocol_id_t {
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X25_PLP = 0x01,
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COMP_TCPIP = 0x06,
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UNCOMP_TCPIP = 0x07,
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SEG_FRAG = 0x08,
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FLEXNET = 0xCE,
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NO_LAYER3 = 0xF0
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};
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class AX25Frame {
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public:
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void make_ui_frame(char* const address, const uint8_t control, const uint8_t protocol, const std::string& info, const std::string& path = "");
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void make_frame_from_raw(const uint8_t* data, size_t len);
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private:
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void NRZI_add_bit(const uint32_t bit);
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void make_extended_field(char* const data, size_t length, bool is_last = false);
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void add_byte(uint8_t byte, bool is_flag, bool is_data);
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void add_data(uint8_t byte);
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void add_checksum();
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void add_flag();
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void flush();
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uint16_t* bb_data_ptr{nullptr};
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uint8_t current_bit{0};
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uint8_t current_byte{0};
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size_t bit_counter{0};
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uint8_t ones_counter{0};
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CRC<16, true, true> crc_ccitt{0x1021, 0xFFFF, 0xFFFF};
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};
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} /* namespace ax25 */
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#endif /*__AX25_H__*/
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