/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* 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 .
*
*/
#ifdef ARDUINO_ARCH_ESP32
#include "../../inc/MarlinConfig.h"
#if ENABLED(WIFISUPPORT)
#include "WebSocketSerial.h"
#include "wifi.h"
#include
#include
struct ring_buffer_r {
unsigned char buffer[RX_BUFFER_SIZE];
volatile ring_buffer_pos_t head, tail;
};
struct ring_buffer_t {
unsigned char buffer[256];
volatile uint8_t head, tail;
};
ring_buffer_r rx_buffer = { { 0 }, 0, 0 };
ring_buffer_t tx_buffer = { { 0 }, 0, 0 };
static bool _written;
#if ENABLED(EMERGENCY_PARSER)
static EmergencyParser::State emergency_state; // = EP_RESET
#endif
AsyncWebSocket ws("/ws"); // access at ws://[esp ip]/ws
FORCE_INLINE int next_rx_index(const int i) { return (ring_buffer_pos_t)(i + 1) & (ring_buffer_pos_t)(RX_BUFFER_SIZE - 1); }
FORCE_INLINE int next_tx_index(const int i) { return (ring_buffer_pos_t)(i + 1) & (ring_buffer_pos_t)(TX_BUFFER_SIZE - 1); }
static void addToBuffer(uint8_t * const data, const size_t len) {
for (size_t i = 0; i < len; i++) {
ring_buffer_pos_t h = rx_buffer.head;
const ring_buffer_pos_t t = rx_buffer.tail, n = next_rx_index(h);
if (n != t) { rx_buffer.buffer[h] = data[i]; h = n; }
// TODO: buffer is full, handle?
rx_buffer.head = h;
}
}
// Handle WebSocket event
static void onEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len) {
switch (type) {
case WS_EVT_CONNECT: client->ping(); break; // client connected
case WS_EVT_DISCONNECT: // client disconnected
case WS_EVT_ERROR: // error was received from the other end
case WS_EVT_PONG: break; // pong message was received (in response to a ping request maybe)
case WS_EVT_DATA: { // data packet
AwsFrameInfo * info = (AwsFrameInfo*)arg;
if (info->opcode == WS_TEXT || info->message_opcode == WS_TEXT)
addToBuffer(data, len);
}
}
}
// Public Methods
void WebSocketSerial::begin(const long baud_setting) {
ws.onEvent(onEvent);
server.addHandler(&ws); // attach AsyncWebSocket
}
void WebSocketSerial::end() { }
int WebSocketSerial::peek(void) {
const int v = rx_buffer.head == rx_buffer.tail ? -1 : rx_buffer.buffer[rx_buffer.tail];
return v;
}
int WebSocketSerial::read(void) {
const ring_buffer_pos_t h = rx_buffer.head, t = rx_buffer.tail;
if (h == t) return -1; // Nothing to read? Return now
const int v = rx_buffer.buffer[t];
rx_buffer.tail = (ring_buffer_pos_t)(t + 1) & (RX_BUFFER_SIZE - 1); // Advance tail
return v;
}
bool WebSocketSerial::available(void) {
const ring_buffer_pos_t h = rx_buffer.head, t = rx_buffer.tail;
return (ring_buffer_pos_t)(RX_BUFFER_SIZE + h - t) & (RX_BUFFER_SIZE - 1);
}
void WebSocketSerial::flush(void) {
ws.textAll("flush");
rx_buffer.tail = rx_buffer.head;
}
#if TX_BUFFER_SIZE
void WebSocketSerial::write(const uint8_t c) {
_written = true;
const uint8_t i = (tx_buffer.head + 1) & (TX_BUFFER_SIZE - 1);
// Store new char. head is always safe to move
tx_buffer.buffer[tx_buffer.head] = c;
tx_buffer.head = i;
if (c == '\n') {
ws.textAll(tx_buffer.buffer, tx_buffer.head);
tx_buffer.head = 0;
}
}
void WebSocketSerial::flushTx(void) {
ws.textAll("flushTx");
if (!_written) return;
}
#else
//void WebSocketSerial::write(const uint8_t c) { _written = true; }
//void WebSocketSerial::flushTx(void) { if (!_written) return; }
#endif
/**
* Imports from print.h
*/
void WebSocketSerial::print(char c, int base) { print((long)c, base); }
void WebSocketSerial::print(unsigned char b, int base) { print((unsigned long)b, base); }
void WebSocketSerial::print(int n, int base) { print((long)n, base); }
void WebSocketSerial::print(unsigned int n, int base) { print((unsigned long)n, base); }
void WebSocketSerial::print(long n, int base) {
if (base == 0)
write(n);
else if (base == 10) {
if (n < 0) { print('-'); n = -n; }
printNumber(n, 10);
}
else
printNumber(n, base);
}
void WebSocketSerial::print(unsigned long n, int base) {
if (base == 0) write(n); else printNumber(n, base);
}
void WebSocketSerial::print(double n, int digits) { printFloat(n, digits); }
void WebSocketSerial::println(void) { print('\r'); print('\n'); }
void WebSocketSerial::println(const String& s) { print(s); println(); }
void WebSocketSerial::println(const char c[]) { print(c); println(); }
void WebSocketSerial::println(char c, int base) { print(c, base); println(); }
void WebSocketSerial::println(unsigned char b, int base) { print(b, base); println(); }
void WebSocketSerial::println(int n, int base) { print(n, base); println(); }
void WebSocketSerial::println(unsigned int n, int base) { print(n, base); println(); }
void WebSocketSerial::println(long n, int base) { print(n, base); println(); }
void WebSocketSerial::println(unsigned long n, int base) { print(n, base); println(); }
void WebSocketSerial::println(double n, int digits) { print(n, digits); println(); }
// Private Methods
void WebSocketSerial::printNumber(unsigned long n, uint8_t base) {
if (n) {
unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
int8_t i = 0;
while (n) {
buf[i++] = n % base;
n /= base;
}
while (i--)
print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
}
else
print('0');
}
void WebSocketSerial::printFloat(double number, uint8_t digits) {
// Handle negative numbers
if (number < 0.0) { print('-'); number = -number; }
// Round correctly so that print(1.999, 2) prints as "2.00"
// Use a lookup table for performance
constexpr double rounds[] = { 0.5, 0.05, 0.005, 0.0005, 0.00005, 0.000005, 0.0000005, 0.00000005 };
number += rounds[digits];
//number += pow(10, -(digits + 1)); // slower single-line equivalent
// Extract the integer part of the number and print it
unsigned long int_part = (unsigned long)number;
print(int_part);
// Print the decimal point, but only if there are digits beyond
double remainder = number - (double)int_part;
if (digits) {
print('.');
// Extract digits from the remainder one at a time
while (digits--) {
remainder *= 10.0;
const int toPrint = int(remainder);
print(toPrint);
remainder -= toPrint;
}
}
}
#endif // WIFISUPPORT
#endif // ARDUINO_ARCH_ESP32