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RNode_Firmware_CE.ino
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// 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
#if BOARD_MODEL == BOARD_RAK4631 || BOARD_MODEL == BOARD_OPENCOM_XL
#define INTERFACE_SPI
// 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
#define INTERFACE_SPI
SPIClass interface_spi[1] = {
// SX1262
SPIClass(
NRF_SPIM3,
interface_pins[0][3],
interface_pins[0][1],
interface_pins[0][2]
)
};
#elif BOARD_MODEL == BOARD_HELTEC_T114
#define INTERFACE_SPI
SPIClass interface_spi[1] = {
// SX1262
SPIClass(
NRF_SPIM1,
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];
uint8_t *packet_queue[INTERFACE_COUNT];
void setup() {
#if MCU_VARIANT == MCU_ESP32
boot_seq();
EEPROM.begin(EEPROM_SIZE);
Serial.setRxBufferSize(CONFIG_UART_BUFFER_SIZE);
#if BOARD_MODEL == BOARD_TDECK
pinMode(pin_poweron, OUTPUT);
digitalWrite(pin_poweron, HIGH);
pinMode(SD_CS, OUTPUT);
pinMode(DISPLAY_CS, OUTPUT);
digitalWrite(SD_CS, HIGH);
digitalWrite(DISPLAY_CS, HIGH);
pinMode(DISPLAY_BL_PIN, OUTPUT);
#endif
#elif MCU_VARIANT == MCU_NRF52
#if BOARD_MODEL == BOARD_TECHO
delay(200);
pinMode(PIN_VEXT_EN, OUTPUT);
digitalWrite(PIN_VEXT_EN, HIGH);
pinMode(pin_btn_usr1, INPUT_PULLUP);
pinMode(pin_btn_touch, INPUT_PULLUP);
pinMode(PIN_LED_RED, OUTPUT);
pinMode(PIN_LED_GREEN, OUTPUT);
pinMode(PIN_LED_BLUE, OUTPUT);
delay(200);
#elif BOARD_MODEL == BOARD_HELTEC_T114
delay(200);
pinMode(PIN_VEXT_EN, OUTPUT);
digitalWrite(PIN_VEXT_EN, HIGH);
delay(100);
#endif
if (!eeprom_begin()) { Serial.write("EEPROM initialisation failed.\r\n"); }
#endif
// Seed the PRNG for CSMA R-value selection
# if MCU_VARIANT == MCU_ESP32
// On ESP32, get the seed value from the
// hardware RNG
int seed_val = (int)esp_random();
#else
// Otherwise, get a pseudo-random seed
// value from an unconnected analog pin
int seed_val = analogRead(0);
#endif
randomSeed(seed_val);
// Initialise serial communication
memset(serialBuffer, 0, sizeof(serialBuffer));
fifo_init(&serialFIFO, serialBuffer, CONFIG_UART_BUFFER_SIZE);
Serial.begin(serial_baudrate);
#if HAS_NP
led_init();
#endif
#if BOARD_MODEL != BOARD_RAK4631 && BOARD_MODEL != BOARD_HELTEC_T114 && BOARD_MODEL != BOARD_TECHO && BOARD_MODEL != BOARD_T3S3 && BOARD_MODEL != BOARD_TBEAM_S_V1 && BOARD_MODEL != BOARD_OPENCOM_XL
// Some boards need to wait until the hardware UART is set up before booting
// the full firmware. In the case of the RAK4631/TECHO, the line below will wait
// until a serial connection is actually established with a master. Thus, it
// is disabled on this platform.
while (!Serial);
#endif
// Configure input and output pins
#if HAS_INPUT
input_init();
#endif
#if HAS_NP == false
pinMode(pin_led_rx, OUTPUT);
pinMode(pin_led_tx, OUTPUT);
#endif
for (int i = 0; i < INTERFACE_COUNT; i++) {
if (interface_pins[i][9] != -1) {
pinMode(interface_pins[i][9], OUTPUT);
digitalWrite(interface_pins[i][9], HIGH);
}
}
// Initialise buffers
memset(pbuf, 0, sizeof(pbuf));
memset(cmdbuf, 0, sizeof(cmdbuf));
memset(packet_starts_buf, 0, sizeof(packet_starts_buf));
memset(packet_lengths_buf, 0, sizeof(packet_starts_buf));
memset(seq, 0xFF, sizeof(seq));
memset(read_len, 0, sizeof(read_len));
setup_interfaces();
modem_packet_queue = xQueueCreate(MODEM_QUEUE_SIZE, sizeof(modem_packet_t*));
for (int i = 0; i < INTERFACE_COUNT; i++) {
fifo16_init(&packet_starts[i], packet_starts_buf, CONFIG_QUEUE_MAX_LENGTH);
fifo16_init(&packet_lengths[i], packet_lengths_buf, CONFIG_QUEUE_MAX_LENGTH);
packet_queue[i] = (uint8_t*)malloc(getQueueSize(i)+1);
}
memset(packet_rdy_interfaces_buf, 0, sizeof(packet_rdy_interfaces_buf));
fifo_init(&packet_rdy_interfaces, packet_rdy_interfaces_buf, MAX_INTERFACES);
#if HAS_GPS
// init GPS
gps_s.begin(GPS_BAUD_RATE);
#endif
// add call to init_channel_stats here? \todo
// Create and configure interface objects
for (uint8_t i = 0; i < INTERFACE_COUNT; i++) {
switch (interfaces[i]) {
case SX1262:
{
sx126x* obj;
// if default spi enabled
if (interface_cfg[i][0]) {
obj = new sx126x(i, &SPI, interface_cfg[i][1],
interface_cfg[i][2], interface_pins[i][0], interface_pins[i][1],
interface_pins[i][2], interface_pins[i][3], interface_pins[i][6],
interface_pins[i][5], interface_pins[i][4], interface_pins[i][8]);
}
else {
obj = new sx126x(i, &interface_spi[i], interface_cfg[i][1],
interface_cfg[i][2], interface_pins[i][0], interface_pins[i][1],
interface_pins[i][2], interface_pins[i][3], interface_pins[i][6],
interface_pins[i][5], interface_pins[i][4], interface_pins[i][8]);
}
interface_obj[i] = obj;
interface_obj_sorted[i] = obj;
break;
}
case SX1276:
case SX1278:
{
sx127x* obj;
// if default spi enabled
if (interface_cfg[i][0]) {
obj = new sx127x(i, &SPI, interface_pins[i][0],
interface_pins[i][1], interface_pins[i][2], interface_pins[i][3],
interface_pins[i][6], interface_pins[i][5], interface_pins[i][4]);
}
else {
obj = new sx127x(i, &interface_spi[i], interface_pins[i][0],
interface_pins[i][1], interface_pins[i][2], interface_pins[i][3],
interface_pins[i][6], interface_pins[i][5], interface_pins[i][4]);
}
interface_obj[i] = obj;
interface_obj_sorted[i] = obj;
break;
}
case SX1280:
{
sx128x* obj;
// if default spi enabled
if (interface_cfg[i][0]) {
obj = new sx128x(i, &SPI, interface_cfg[i][1],
interface_pins[i][0], interface_pins[i][1], interface_pins[i][2],
interface_pins[i][3], interface_pins[i][6], interface_pins[i][5],
interface_pins[i][4], interface_pins[i][8], interface_pins[i][7]);
}
else {
obj = new sx128x(i, &interface_spi[i], interface_cfg[i][1],
interface_pins[i][0], interface_pins[i][1], interface_pins[i][2],
interface_pins[i][3], interface_pins[i][6], interface_pins[i][5],
interface_pins[i][4], interface_pins[i][8], interface_pins[i][7]);
}
interface_obj[i] = obj;
interface_obj_sorted[i] = obj;
break;
}
default:
break;
}
}
#if BOARD_MODEL == BOARD_T3S3 && BOARD_VARIANT == MODEL_AC
// Fix weird radio not found bug on T3S3 SX1280
delay(300);
interface_obj[0]->reset();
delay(100);
#endif
// Check installed transceiver chip(s) and probe boot parameters. If any of
// the configured modems cannot be initialised, do not boot
for (int i = 0; i < INTERFACE_COUNT; i++) {
switch (interfaces[i]) {
case SX1262:
case SX1276:
case SX1278:
case SX1280:
selected_radio = interface_obj[i];
break;
default:
modems_installed = false;
break;
}
if (selected_radio->preInit()) {
modems_installed = true;
#if HAS_INPUT
// Skip quick-reset console activation
#else
uint32_t lfr = selected_radio->getFrequency();
if (lfr == 0) {
// Normal boot
} else if (lfr == M_FRQ_R) {
// Quick reboot
#if HAS_CONSOLE
if (rtc_get_reset_reason(0) == POWERON_RESET) {
console_active = true;
}
#endif
} else {
// Unknown boot
}
selected_radio->setFrequency(M_FRQ_S);
#endif
} else {
modems_installed = false;
}
if (!modems_installed) {
break;
}
}
#if HAS_DISPLAY
#if HAS_EEPROM
if (EEPROM.read(eeprom_addr(ADDR_CONF_DSET)) != CONF_OK_BYTE) {
#elif MCU_VARIANT == MCU_NRF52
if (eeprom_read(eeprom_addr(ADDR_CONF_DSET)) != CONF_OK_BYTE) {
#endif
eeprom_update(eeprom_addr(ADDR_CONF_DSET), CONF_OK_BYTE);
#if BOARD_MODEL == BOARD_TECHO
eeprom_update(eeprom_addr(ADDR_CONF_DINT), 0x03);
#else
eeprom_update(eeprom_addr(ADDR_CONF_DINT), 0xFF);
#endif
}
#if BOARD_MODEL == BOARD_OPENCOM_XL && (DISPLAY == EINK_BW || DISPLAY == EINK_3C)
// On this board it isn't possible to run the main loop whilst the
// display is updating as the SPI pins are shared between the display and
// secondary modem. Because running the main loop causes a lockup, we
// just run the serial poll loop instead.
display_add_callback(process_serial);
#elif DISPLAY == EINK_BW || DISPLAY == EINK_3C
display_add_callback(work_while_waiting);
#endif
display_unblank();
disp_ready = display_init();
if (disp_ready) update_display();
#endif
#if HAS_PMU == true
pmu_ready = init_pmu();
#endif
#if HAS_BLUETOOTH || HAS_BLE == true
bt_init();
bt_init_ran = true;
#endif
if (console_active) {
#if HAS_CONSOLE
console_start();
#else
kiss_indicate_reset();
#endif
} else {
kiss_indicate_reset();
}
for (int i = 0; i < INTERFACE_COUNT; i++) {
selected_radio = interface_obj[i];
if (interfaces[i] == SX1280) {
selected_radio->setAvdInterference(false);
}
if (selected_radio->getAvdInterference()) {
#if HAS_EEPROM
uint8_t ia_conf = EEPROM.read(eeprom_addr(ADDR_CONF_DIA));
if (ia_conf == 0x00) { selected_radio->setAvdInterference(true); }
else { selected_radio->setAvdInterference(false); }
#elif MCU_VARIANT == MCU_NRF52
uint8_t ia_conf = eeprom_read(eeprom_addr(ADDR_CONF_DIA));
if (ia_conf == 0x00) { selected_radio->setAvdInterference(true); }
else { selected_radio->setAvdInterference(false); }
#endif
}
}
// Validate board health, EEPROM and config
validate_status();
}
void lora_receive(RadioInterface* radio) {
if (!implicit) {
radio->receive();
} else {
radio->receive(implicit_l);
}
}
inline void kiss_write_packet(int index) {
// Print index of interface the packet came from
serial_write(FEND);
serial_write(CMD_SEL_INT);
serial_write(index);
serial_write(FEND);
serial_write(FEND);
serial_write(CMD_DATA);
for (uint16_t i = 0; i < read_len[index]; i++) {
#if MCU_VARIANT == MCU_NRF52
portENTER_CRITICAL();
uint8_t byte = pbuf[i];
portEXIT_CRITICAL();
#else
uint8_t byte = pbuf[i];
#endif
if (byte == FEND) { serial_write(FESC); byte = TFEND; }
if (byte == FESC) { serial_write(FESC); byte = TFESC; }
serial_write(byte);
}
serial_write(FEND);
read_len[index] = 0;
#if MCU_VARIANT == MCU_ESP32 && HAS_BLE
bt_flush();
#endif
}
inline void getPacketData(RadioInterface* radio, uint16_t len) {
uint8_t index = radio->getIndex();
#if MCU_VARIANT != MCU_NRF52
while (len-- && read_len[index] < MTU) {
pbuf[read_len[index]++] = radio->read();
}
#else
BaseType_t int_mask = taskENTER_CRITICAL_FROM_ISR();
while (len-- && read_len[index] < MTU) {
pbuf[read_len[index]++] = radio->read();
}
taskEXIT_CRITICAL_FROM_ISR(int_mask);
#endif
}
inline bool queue_packet(RadioInterface* radio, uint8_t index) {
// Allocate packet struct, but abort if there
// is not enough memory available.
modem_packet_t *modem_packet = (modem_packet_t*)malloc(sizeof(modem_packet_t) + read_len[index]);
if(!modem_packet) { memory_low = true; return false; }
// Get packet RSSI and SNR
modem_packet->snr_raw = radio->packetSnrRaw();
// Pass raw SNR to get RSSI as SX127X driver requires it for calculations
modem_packet->rssi = radio->packetRssi(modem_packet->snr_raw);
modem_packet->interface = index;
// Send packet to event queue, but free the
// allocated memory again if the queue is
// unable to receive the packet.
modem_packet->len = read_len[index];
memcpy(modem_packet->data, pbuf, read_len[index]);
if (!modem_packet_queue || xQueueSendFromISR(modem_packet_queue, &modem_packet, NULL) != pdPASS) {
free(modem_packet);
return false;
}
return true;
}
void ISR_VECT receive_callback(uint8_t index, int packet_size) {
selected_radio = interface_obj[index];
bool ready = false;
BaseType_t int_mask;
if (!promisc) {
// The standard operating mode allows large
// packets with a payload up to 500 bytes,
// by combining two raw LoRa packets.
// We read the 1-byte header and extract
// packet sequence number and split flags
uint8_t header = selected_radio->read(); packet_size--;
uint8_t sequence = packetSequence(header);
if (isSplitPacket(header) && seq[index] == SEQ_UNSET) {
// This is the first part of a split
// packet, so we set the seq variable
// and add the data to the buffer
#if MCU_VARIANT == MCU_NRF52
int_mask = taskENTER_CRITICAL_FROM_ISR(); read_len[index] = 0; taskEXIT_CRITICAL_FROM_ISR(int_mask);
#else
read_len[index] = 0;
#endif
seq[index] = sequence;
getPacketData(selected_radio, packet_size);
} else if (isSplitPacket(header) && seq[index] == sequence) {
// This is the second part of a split
// packet, so we add it to the buffer
// and set the ready flag.
getPacketData(selected_radio, packet_size);
seq[index] = SEQ_UNSET;
ready = true;
} else if (isSplitPacket(header) && seq[index] != sequence) {
// This split packet does not carry the
// same sequence id, so we must assume
// that we are seeing the first part of
// a new split packet.
#if MCU_VARIANT == MCU_NRF52
int_mask = taskENTER_CRITICAL_FROM_ISR(); read_len[index] = 0; taskEXIT_CRITICAL_FROM_ISR(int_mask);
#else
read_len[index] = 0;
#endif
seq[index] = sequence;
getPacketData(selected_radio, packet_size);
} else if (!isSplitPacket(header)) {
// This is not a split packet, so we
// just read it and set the ready
// flag to true.
if (seq[index] != SEQ_UNSET) {
// If we already had part of a split
// packet in the buffer, we clear it.
#if MCU_VARIANT == MCU_NRF52
int_mask = taskENTER_CRITICAL_FROM_ISR(); read_len[index] = 0; taskEXIT_CRITICAL_FROM_ISR(int_mask);
#else
read_len[index] = 0;
#endif
seq[index] = SEQ_UNSET;
}
getPacketData(selected_radio, packet_size);
ready = true;
}
} else {
// In promiscuous mode, raw packets are
// output directly to the host
read_len[index] = 0;
getPacketData(selected_radio, packet_size);
ready = true;
}
if (ready) {
queue_packet(selected_radio, index);
}
last_rx = millis();
}
bool startRadio(RadioInterface* radio) {
update_radio_lock(radio);
if (modems_installed && !console_active) {
if (!radio->getRadioOnline()) {
if (!radio->getRadioLock() && hw_ready) {
if (!radio->begin()) {
// The radio could not be started.
// Indicate this failure over both the
// serial port and with the onboard LEDs
kiss_indicate_error(ERROR_INITRADIO);
led_indicate_error(0);
return false;
} else {
radio->enableCrc();
radio->onReceive(receive_callback);
radio->updateBitrate();
sort_interfaces();
kiss_indicate_phy_stats(radio);
lora_receive(radio);
// Flash an info pattern to indicate
// that the radio is now on
kiss_indicate_radiostate(radio);
led_indicate_info(3);
return true;
}
} else {
// Flash a warning pattern to indicate
// that the radio was locked, and thus
// not started
kiss_indicate_radiostate(radio);
led_indicate_warning(3);
return false;
}
} else {
// If radio is already on, we silently
// ignore the request.
kiss_indicate_radiostate(radio);
return true;
}
}
return false;
}
void stopRadio(RadioInterface* radio) {
if (radio->getRadioOnline()) {
radio->end();
sort_interfaces();
kiss_indicate_radiostate(radio);
}
}
void update_radio_lock(RadioInterface* radio) {
if (radio->getFrequency() != 0 && radio->getSignalBandwidth() != 0 && radio->getTxPower() != 0xFF && radio->getSpreadingFactor() != 0) {
radio->setRadioLock(false);
} else {
radio->setRadioLock(true);
}
}
// Check if the queue is full for the selected radio.
// Returns true if full, false if not
bool queue_full(RadioInterface* radio) {
return (queue_height[radio->getIndex()] >= (CONFIG_QUEUE_MAX_LENGTH) || queued_bytes[radio->getIndex()] >= (getQueueSize(radio->getIndex())));
}
volatile bool queue_flushing = false;
// Flushes all packets for the interface
void flush_queue(RadioInterface* radio) {
uint8_t index = radio->getIndex();
if (!queue_flushing) {
queue_flushing = true;
led_tx_on();
uint16_t processed = 0;
uint8_t data_byte;
while (!fifo16_isempty(&packet_starts[index])) {
uint16_t start = fifo16_pop(&packet_starts[index]);
uint16_t length = fifo16_pop(&packet_lengths[index]);
if (length >= MIN_L && length <= MTU) {
for (uint16_t i = 0; i < length; i++) {
uint16_t pos = (start+i)%(getQueueSize(index));
tbuf[i] = packet_queue[index][pos];
}
transmit(radio, length);
processed++;
}
}
lora_receive(radio);
led_tx_off();
}
queue_flushing = false;
queue_height[index] = 0;
queued_bytes[index] = 0;
radio->updateAirtime();
#if HAS_DISPLAY
display_tx[radio->getIndex()] = true;
#endif
}
void pop_queue(RadioInterface* radio) {
uint8_t index = radio->getIndex();
if (!queue_flushing) {
queue_flushing = true;
led_tx_on(); uint16_t processed = 0;
if (!fifo16_isempty(&packet_starts[index])) {
uint16_t start = fifo16_pop(&packet_starts[index]);
uint16_t length = fifo16_pop(&packet_lengths[index]);
if (length >= MIN_L && length <= MTU) {
for (uint16_t i = 0; i < length; i++) {
uint16_t pos = (start+i)%getQueueSize(index);
tbuf[i] = packet_queue[index][pos];
}
transmit(radio, length); processed++;
}
queue_height[index] -= processed;
queued_bytes[index] -= length;
}
lora_receive(radio); led_tx_off();
}
radio->updateAirtime();
queue_flushing = false;
#if HAS_DISPLAY
display_tx[radio->getIndex()] = true;
#endif
}
void transmit(RadioInterface* radio, uint16_t size) {
if (radio->getRadioOnline()) {
if (!promisc) {
uint16_t written = 0;
uint8_t header = random(256) & 0xF0;
if (size > SINGLE_MTU - HEADER_L) {
header = header | FLAG_SPLIT;
}
radio->beginPacket();
radio->write(header); written++;
for (uint16_t i=0; i < size; i++) {
radio->write(tbuf[i]);
written++;
// Only start a new packet if this is a split packet and it has
// exceeded the length of a single packet
if (written == 255 && isSplitPacket(header)) {
if (!radio->endPacket()) {
kiss_indicate_error(ERROR_MODEM_TIMEOUT);
kiss_indicate_error(ERROR_TXFAILED);
led_indicate_error(5);
hard_reset();
}
radio->addAirtime();
radio->beginPacket();
radio->write(header);
written = 1;
}
}
if (!radio->endPacket()) {
kiss_indicate_error(ERROR_MODEM_TIMEOUT);
kiss_indicate_error(ERROR_TXFAILED);
led_indicate_error(5);
hard_reset();
}
radio->addAirtime();
} else {
// In promiscuous mode, we only send out
// plain raw LoRa packets with a maximum
// payload of 255 bytes
led_tx_on();
uint16_t written = 0;
// Cap packets at 255 bytes
if (size > SINGLE_MTU) {
size = SINGLE_MTU;
}
// If implicit header mode has been set,
// set packet length to payload data length
if (!implicit) {
radio->beginPacket();
} else {
radio->beginPacket(size);
}
for (uint16_t i=0; i < size; i++) {
radio->write(tbuf[i]);
written++;
}
radio->endPacket(); radio->addAirtime();
}
last_tx = millis();
} else {
kiss_indicate_error(ERROR_TXFAILED);
led_indicate_error(5);
}
}
void serial_callback(uint8_t sbyte) {
if (IN_FRAME && sbyte == FEND &&
command == CMD_DATA) {
IN_FRAME = false;
if (interface < INTERFACE_COUNT) {
if (!fifo16_isfull(&packet_starts[interface]) && (queued_bytes[interface] < (getQueueSize(interface)))) {
uint16_t s = current_packet_start[interface];
int32_t e = queue_cursor[interface]-1; if (e == -1) e = (getQueueSize(interface))-1;
uint16_t l;
if (s != e) {
l = (s < e) ? e - s + 1: (getQueueSize(interface)) - s + e + 1;
} else {
l = 1;
}
if (l >= MIN_L) {
queue_height[interface]++;
fifo16_push(&packet_starts[interface], s);
fifo16_push(&packet_lengths[interface], l);
current_packet_start[interface] = queue_cursor[interface];
}
}
}
} else if (sbyte == FEND) {
IN_FRAME = true;
command = CMD_UNKNOWN;
frame_len = 0;
} else if (IN_FRAME && frame_len < MTU) {
// Have a look at the command byte first
if (frame_len == 0 && command == CMD_UNKNOWN) {
command = sbyte;
} else if (command == CMD_SEL_INT) {
interface = sbyte;
} else if (command == CMD_DATA) {
if (bt_state != BT_STATE_CONNECTED) cable_state = CABLE_STATE_CONNECTED;
if (sbyte == FESC) {
ESCAPE = true;
} else {
if (ESCAPE) {
if (sbyte == TFEND) sbyte = FEND;
if (sbyte == TFESC) sbyte = FESC;
ESCAPE = false;
}
if (interface < INTERFACE_COUNT) {
if (queue_height[interface] < CONFIG_QUEUE_MAX_LENGTH && queued_bytes[interface] < (getQueueSize(interface))) {
queued_bytes[interface]++;
packet_queue[interface][queue_cursor[interface]++] = sbyte;
if (queue_cursor[interface] == (getQueueSize(interface))) queue_cursor[interface] = 0;
}
}
}
} else if (command == CMD_INTERFACES) {
for (int i = 0; i < INTERFACE_COUNT; i++) {
kiss_indicate_interface(i);
}
} else if (command == CMD_FREQUENCY) {
if (sbyte == FESC) {
ESCAPE = true;
} else {
if (ESCAPE) {
if (sbyte == TFEND) sbyte = FEND;
if (sbyte == TFESC) sbyte = FESC;
ESCAPE = false;
}
if (frame_len < CMD_L) cmdbuf[frame_len++] = sbyte;
}
if (frame_len == 4) {
selected_radio = interface_obj[interface];
uint32_t freq = (uint32_t)cmdbuf[0] << 24 | (uint32_t)cmdbuf[1] << 16 | (uint32_t)cmdbuf[2] << 8 | (uint32_t)cmdbuf[3];
if (freq == 0) {
kiss_indicate_frequency(selected_radio);
} else {
if (op_mode == MODE_HOST) selected_radio->setFrequency(freq);
kiss_indicate_frequency(selected_radio);
}
interface = 0;
}
} else if (command == CMD_BANDWIDTH) {
if (sbyte == FESC) {
ESCAPE = true;
} else {
if (ESCAPE) {
if (sbyte == TFEND) sbyte = FEND;
if (sbyte == TFESC) sbyte = FESC;
ESCAPE = false;
}
if (frame_len < CMD_L) cmdbuf[frame_len++] = sbyte;
}
if (frame_len == 4) {
selected_radio = interface_obj[interface];
uint32_t bw = (uint32_t)cmdbuf[0] << 24 | (uint32_t)cmdbuf[1] << 16 | (uint32_t)cmdbuf[2] << 8 | (uint32_t)cmdbuf[3];
if (bw == 0) {
kiss_indicate_bandwidth(selected_radio);
} else {
if (op_mode == MODE_HOST) selected_radio->setSignalBandwidth(bw);
selected_radio->updateBitrate();
sort_interfaces();
kiss_indicate_bandwidth(selected_radio);
kiss_indicate_phy_stats(selected_radio);
}
interface = 0;
}
} else if (command == CMD_TXPOWER) {
selected_radio = interface_obj[interface];
if (sbyte == 0xFF) {
kiss_indicate_txpower(selected_radio);
} else {
int8_t txp = (int8_t)sbyte;
if (op_mode == MODE_HOST) setTXPower(selected_radio, txp);
kiss_indicate_txpower(selected_radio);
}
interface = 0;
} else if (command == CMD_SF) {
selected_radio = interface_obj[interface];
if (sbyte == 0xFF) {
kiss_indicate_spreadingfactor(selected_radio);
} else {
int sf = sbyte;
if (sf < 5) sf = 5;
if (sf > 12) sf = 12;
if (op_mode == MODE_HOST) selected_radio->setSpreadingFactor(sf);
selected_radio->updateBitrate();
sort_interfaces();
kiss_indicate_spreadingfactor(selected_radio);
kiss_indicate_phy_stats(selected_radio);
}
interface = 0;
} else if (command == CMD_CR) {
selected_radio = interface_obj[interface];
if (sbyte == 0xFF) {
kiss_indicate_codingrate(selected_radio);
} else {
int cr = sbyte;
if (cr < 5) cr = 5;
if (cr > 8) cr = 8;
if (op_mode == MODE_HOST) selected_radio->setCodingRate4(cr);
selected_radio->updateBitrate();
sort_interfaces();
kiss_indicate_codingrate(selected_radio);
kiss_indicate_phy_stats(selected_radio);
}
interface = 0;
} else if (command == CMD_IMPLICIT) {
set_implicit_length(sbyte);
kiss_indicate_implicit_length();
} else if (command == CMD_LEAVE) {
if (sbyte == 0xFF) {
display_unblank();
cable_state = CABLE_STATE_DISCONNECTED;
//current_rssi = -292;
last_rssi = -292;
last_rssi_raw = 0x00;
last_snr_raw = 0x80;
}
} else if (command == CMD_RADIO_STATE) {
selected_radio = interface_obj[interface];
if (bt_state != BT_STATE_CONNECTED) cable_state = CABLE_STATE_CONNECTED;
if (sbyte == 0xFF) {
kiss_indicate_radiostate(selected_radio);
} else if (sbyte == 0x00) {
stopRadio(selected_radio);
} else if (sbyte == 0x01) {
startRadio(selected_radio);
}
interface = 0;
} else if (command == CMD_ST_ALOCK) {
if (sbyte == FESC) {
ESCAPE = true;
} else {
if (ESCAPE) {
if (sbyte == TFEND) sbyte = FEND;
if (sbyte == TFESC) sbyte = FESC;
ESCAPE = false;