opencom_xl_firmware/opencom_xl_firmware.ino

// Copyright (C) 2024, Mark Qvist

// 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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.

#include <Arduino.h>
#include <SPI.h>
#include "Utilities.h"

#if MCU_VARIANT == MCU_NRF52
  #define INTERFACE_SPI
  #if BOARD_MODEL == BOARD_RAK4631 || BOARD_MODEL == BOARD_OPENCOM_XL
        // Required because on RAK4631, non-default SPI pins must be initialised when class is declared.
      SPIClass interface_spi[1] = {
            // SX1262
            SPIClass(
                NRF_SPIM2, 
                interface_pins[0][3], 
                interface_pins[0][1], 
                interface_pins[0][2]
               )
      };
  #elif BOARD_MODEL == BOARD_TECHO
    SPIClass interface_spi[1] = {
            // SX1262
            SPIClass(
                NRF_SPIM3, 
                interface_pins[0][3], 
                interface_pins[0][1], 
                interface_pins[0][2]
               )
      };
  #endif
#endif

#ifndef INTERFACE_SPI
// INTERFACE_SPI is only required on NRF52 platforms, as the SPI pins are set in the class constructor and not by a setter method.
// Even if custom SPI interfaces are not needed, the array must exist to prevent compilation errors.
#define INTERFACE_SPI
SPIClass interface_spi[1];
#endif

FIFOBuffer serialFIFO;
uint8_t serialBuffer[CONFIG_UART_BUFFER_SIZE+1];

uint16_t packet_starts_buf[(CONFIG_QUEUE_MAX_LENGTH)+1];

uint16_t packet_lengths_buf[(CONFIG_QUEUE_MAX_LENGTH)+1];

FIFOBuffer16 packet_starts[INTERFACE_COUNT];
FIFOBuffer16 packet_lengths[INTERFACE_COUNT];

volatile uint8_t queue_height[INTERFACE_COUNT] = {0};
volatile uint16_t queued_bytes[INTERFACE_COUNT] = {0};

volatile uint16_t queue_cursor[INTERFACE_COUNT] = {0};
volatile uint16_t current_packet_start[INTERFACE_COUNT] = {0};
volatile bool serial_buffering = false;
extern void setup_interfaces(); // from src/misc/ModemISR.h
#if HAS_BLUETOOTH || HAS_BLE == true
  bool bt_init_ran = false;
#endif

#if HAS_CONSOLE
  #include "Console.h"
#endif

#define MODEM_QUEUE_SIZE 4*INTERFACE_COUNT
typedef struct {
      size_t len;
      int rssi;
      int snr_raw;
      uint8_t interface;
      uint8_t data[];
} modem_packet_t;
static xQueueHandle modem_packet_queue = NULL;

char sbuf[128];