Implemented streaming of images over UDP with Ethernet Shield
This commit is contained in:
Uwe Lippmann
parent
0845f3705a
commit
db3ffa126e
1 changed files with 50 additions and 84 deletions
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@ -1,11 +1,15 @@
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#include <SPI.h>
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#include <Ethernet.h>
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#include <EthernetUdp.h>
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#include "Adafruit_NeoPixel.h"
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#define PIN 6
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enum {
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WIDTH=16,
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HEIGHT=16,
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N=WIDTH*HEIGHT*3
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};
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#define WIDTH 16
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#define HEIGHT 16
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#define UDP_PACKET_MAX_SIZE 768
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#define PIXEL_OFFSET 0x80
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// Parameter 1 = number of pixels in strip
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// Parameter 2 = pin number (most are valid)
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// Parameter 3 = pixel type flags, add together as needed:
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@ -15,92 +19,54 @@ enum {
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// NEO_KHZ800 800 KHz bitstream (e.g. High Density LED strip)
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Adafruit_NeoPixel strip = Adafruit_NeoPixel(WIDTH * HEIGHT, PIN, NEO_GRB + NEO_KHZ800);
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// Network configuration
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byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
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IPAddress ip(172, 22, 239, 182);
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unsigned int localPort = 8888;
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// buffers for receiving and sending data
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char packetBuffer[UDP_PACKET_MAX_SIZE]; // buffer to hold incoming packet
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// Create EthernetUdp instance to send and receive packets over UDP
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EthernetUDP Udp;
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void setup() {
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// initialize ethernet device
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Ethernet.begin(mac, ip);
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// Start UDP
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Udp.begin(localPort);
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strip.begin();
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strip.show(); // Initialize all pixels to 'off'
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Serial.begin(115200);
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}
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int j = 0;
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int counter = 0;
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char buf[3*WIDTH*HEIGHT];
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void loop() {
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int incomingByte = 0;
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while((Serial.available() > 0) && (incomingByte != -1)) {
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incomingByte = Serial.read();
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if (incomingByte != -1) {
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if(incomingByte == 254)
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counter = 0;
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else{
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buf[counter] = incomingByte;
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counter++;
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if (counter >= N)
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counter = 0;
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}
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}
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}
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if (counter >= N-1) {
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for (int i = 0; i < WIDTH*HEIGHT; i++) {
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strip.setPixelColor(i, strip.Color(buf[3*i], buf[3*i+1], buf[3*i+2]));
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}
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strip.show();
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}
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}
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// Fill the dots one after the other with a color
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void colorWipe(uint32_t c, uint8_t wait) {
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for(uint16_t i=0; i<strip.numPixels(); i++) {
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strip.setPixelColor(i, c);
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strip.show();
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delay(wait);
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}
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}
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void colorFill(uint32_t c) {
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for(uint16_t i=0; i<strip.numPixels(); i++) {
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strip.setPixelColor(i, c);
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// Initialize all pixels to 'off'
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for (int i=0; i<256; i++) {
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strip.setPixelColor(i, strip.Color(0, 0, 0));
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}
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strip.show();
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// delay(50);
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Serial.begin(115200);
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Serial.println("Ready.");
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}
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void rainbow(uint8_t wait) {
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uint16_t i, j;
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void loop() {
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// if there is data available, read a packet
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int packetSize = Udp.parsePacket();
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for(j=0; j<256; j++) {
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for(i=0; i<strip.numPixels(); i++) {
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strip.setPixelColor(i, Wheel((i+j) & 255));
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if (packetSize) {
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// read the packet into packet buffer
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Udp.read(packetBuffer, UDP_PACKET_MAX_SIZE);
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Serial.println("Received packet:");
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Serial.print("Length: ");
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Serial.println(packetSize);
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// assume an incoming uncompressed BMP image
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// assume we know the pixels start at offset 54
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for (int i = 0; i < packetSize; i = i + 3) {
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Serial.print(packetBuffer[i], HEX);
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Serial.print(packetBuffer[i+1], HEX);
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Serial.print(packetBuffer[i+2], HEX);
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Serial.print(" ");
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strip.setPixelColor(i / 3, packetBuffer[i], packetBuffer[i+1], packetBuffer[i+2]);
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}
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Serial.print("\n");
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strip.show();
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delay(wait);
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}
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}
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// Slightly different, this makes the rainbow equally distributed throughout
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void rainbowCycle(uint8_t wait) {
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uint16_t i, j;
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for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
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for(i=0; i< strip.numPixels(); i++) {
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strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
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}
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strip.show();
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delay(wait);
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}
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}
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// Input a value 0 to 255 to get a color value.
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// The colours are a transition r - g - b - back to r.
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uint32_t Wheel(byte WheelPos) {
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if(WheelPos < 85) {
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return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
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} else if(WheelPos < 170) {
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WheelPos -= 85;
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return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
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} else {
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WheelPos -= 170;
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return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
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}
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}
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