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#include <Arduino.h>
#include <WiFiUdp.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#define END 0xc0
#define ESC 0xdb
#define ESC_END 0xdc
#define ESC_ESC 0xdd
WiFiUDP u;
struct artnet {
char name[8]; // Art-Net\0
char opcode[2]; // 0x5000 in LE: { 0x00, 0x50 }
uint8_t version_hi; // 0
uint8_t version_lo; // 14
uint8_t sequence; // set to 0 to disable sequencing
uint8_t physical; // original universe
uint8_t sub_uni;
uint8_t net;
uint8_t length_hi;
uint8_t length_lo;
unsigned char data[512]; // increase for fun
} __attribute__((packed));
struct udp {
uint16_t srcport __attribute__((packed));
uint16_t dstport __attribute__((packed));
uint16_t length __attribute__((packed));
uint16_t checksum __attribute__((packed));
} __attribute__((packed));
#define LOW_DELAY (1 << 4)
#define HIGH_THROUGHPUT (1 << 3)
#define HIGH_RELIABILITY (1 << 2)
#define ROUTINE (0 << 5)
#define PRIORITY (1 << 5)
#define IMMEDIATE (1 << 6)
#define FLASH (PRIORITY | IMMEDIATE)
#define FLASH_OVERRIDE (1 << 7)
#define CRITICAL (FLASH_OVERRIDE | PRIORITY)
#define INETCTRL (FLASH_OVERRIDE | IMMEDIATE)
#define NETCTRL (FLASH_OVERRIDE | FLASH)
#define HEADLENOR (1 << 6) /* always bitwiseOR the headlen with this to apply the version number */
#define EVIL (1 << 15)
#define DF (1 << 14)
#define MF (1 << 13)
#define ICMP 1
#define TCP 6
#define UDP 17
struct ip {
uint8_t headlen;
uint8_t srvtype;
uint16_t length __attribute__((packed));
uint16_t identifier __attribute__((packed));
uint16_t foffset __attribute__((packed));
uint8_t ttl;
uint8_t protocol;
uint16_t checksum;
unsigned char src[4];
unsigned char dst[4];
} __attribute__((packed));
struct artnet_over_slip {
struct ip ip;
struct udp udp;
struct artnet artnet;
} __attribute__((packed));
struct artnet_over_slip p;
unsigned w = 0;
unsigned long č = 0;
unsigned char t;
void setup () {
pinMode(D0, OUTPUT);
Serial.begin(250000, SERIAL_8N2);
Serial.swap();
Serial1.begin(/* MONITOR_SPEED */ 115200);
// WiFi.softAP("dmx2artnet", NULL, 11, 0, 8);
WiFi.begin("OpenWrt", NULL);
// WiFi.begin("Hell Patrol", WIFI_PW);
u.begin(6454);
sprintf(p.artnet.name, "Art-Net");
p.artnet.opcode[0] = 0x00;
p.artnet.opcode[1] = 0x50;
p.artnet.version_hi = 0;
p.artnet.version_lo = 14;
p.artnet.sequence = 0;
p.artnet.physical = 0;
p.artnet.sub_uni = 0;
p.artnet.net = 0;
p.udp.srcport = p.udp.dstport = htons(6454);
p.udp.checksum = 0;
p.ip.headlen = HEADLENOR | 5;
p.ip.srvtype = 0;
p.ip.foffset = 0;
p.ip.ttl = 255;
p.ip.protocol = UDP;
p.ip.src[0] = 2;
p.ip.src[1] = (ESP.getChipId() & 0xff0000) >> 16;
p.ip.src[2] = (ESP.getChipId() & 0xff00) >> 8;
p.ip.src[3] = (ESP.getChipId() & 0xff);
memset(p.ip.dst, 255, 4);
}
char slip_buf[sizeof p * 2 + 1];
unsigned char recording[sizeof p.artnet.data * 2];
unsigned slip_off = 0;
unsigned slip_len = 0;
#define SLIP Serial1
void loop () {
unsigned avail = SLIP.availableForWrite();
if (slip_off < slip_len && avail) {
if (avail > slip_len-slip_off)
avail = slip_len-slip_off;
slip_off += SLIP.write(slip_buf+slip_off, avail);
}
if (Serial.available()) {
č = millis();
if (w < sizeof p.artnet.data * 2)
recording[w++] = Serial.read();
else
Serial.read();
}
if (č + 1 < millis() && w) {
unsigned T;
for (T = 0; T < w; T++) // prvi kanal ne sme biti 0, tako zaznamo začetek paketa
if (recording[T] > 1)
break;
memcpy(p.artnet.data, recording + T, sizeof p.artnet.data);
unsigned l = w-T;
if (l > sizeof p.artnet.data)
l = sizeof p.artnet.data;
/* l++;
while (--l)
if (p.data[l-1])
break; */
if (!t) {
p.artnet.length_hi = l / 256;
p.artnet.length_lo = l % 256;
IPAddress b(255, 255, 255, 255);
u.beginPacket(b, 6454);
u.write((unsigned char *) &p.artnet, sizeof p.artnet - sizeof p.artnet.data + l);
u.endPacket();
if (slip_off >= slip_len) {
p.ip.identifier = htons(millis());
p.udp.length = htons(sizeof p.udp + sizeof p.artnet - sizeof p.artnet.data + l);
p.ip.length = htons(sizeof p - sizeof p.artnet.data + l);
p.ip.checksum = 0;
uint32_t sum = 0;
for (unsigned i = 0; i < sizeof p/2+sizeof p%2; i++)
sum += ntohs(((uint16_t *) &p)[i]);
while (sum >> 16)
sum = (sum >> 16) + sum % 65536;
p.ip.checksum = htons(~sum);
slip_len = 0;
slip_off = 0;
for (unsigned i = 0; i < sizeof p; i++) {
unsigned char val = ((unsigned char *) &p)[i];
switch (val) {
case ESC:
slip_buf[slip_len++] = ESC;
slip_buf[slip_len++] = ESC_ESC;
break;
case END:
slip_buf[slip_len++] = ESC;
slip_buf[slip_len++] = ESC_END;
break;
default:
slip_buf[slip_len++] = val;
break;
}
}
slip_buf[slip_len++] = END;
}
}
/*
Serial1.println("dolžina podatkov " + String(w-T) + ", tip: " + String(t));
for (unsigned i = 0; i < l; i++)
if (p.artnet.data[i])
Serial1.println("\t" + String(i+1) + ": " + String(p.artnet.data[i]));
*/
w = 0;
}
}
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