121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* vim: sw=2 ts=2 expandtab
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*
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* "THE PIZZA-WARE LICENSE" (derived from "THE BEER-WARE LICENCE"):
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* Thomas Kolb <cfr34k@tkolb.de> wrote this file. As long as you retain this
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* notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a pizza in return.
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* - Thomas Kolb
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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#include "sk6812.h"
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#define SET_COLOR 0
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#define FADE_COLOR 1
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#define ADD_COLOR 2
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#define SET_FADESTEP 3
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struct __attribute__((__packed__)) SK6812Packet {
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uint8_t action;
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uint16_t module;
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uint8_t data[4];
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};
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int sk6812_socket = -1;
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struct __attribute__((__packed__)) SK6812Packet packetQueue[1024];
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int queueIndex = 0;
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// creates the socket needed for steering the LED strip
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int sk6812_init(const char *host, unsigned short port) {
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struct addrinfo hints;
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struct addrinfo *result;
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char portstr[6];
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = 0;
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hints.ai_protocol = 0;
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sprintf(portstr, "%u", port);
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if(getaddrinfo(host, portstr, &hints, &result) != 0) {
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perror("getaddrinfo() failed");
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return 1;
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}
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sk6812_socket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
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if (sk6812_socket == -1) {
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perror("socket() failed");
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freeaddrinfo(result);
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return 2;
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}
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if (connect(sk6812_socket, result->ai_addr, result->ai_addrlen) == -1) {
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perror("connect() failed");
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freeaddrinfo(result);
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return 3;
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}
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freeaddrinfo(result);
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return 0;
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}
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void sk6812_set_color(uint16_t module, uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
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packetQueue[queueIndex].action = SET_COLOR;
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packetQueue[queueIndex].module = htons(module);
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packetQueue[queueIndex].data[0] = r;
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packetQueue[queueIndex].data[1] = g;
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packetQueue[queueIndex].data[2] = b;
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packetQueue[queueIndex].data[3] = w;
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queueIndex++;
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}
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void sk6812_fade_color(uint16_t module, uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
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packetQueue[queueIndex].action = FADE_COLOR;
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packetQueue[queueIndex].module = htons(module);
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packetQueue[queueIndex].data[0] = r;
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packetQueue[queueIndex].data[1] = g;
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packetQueue[queueIndex].data[2] = b;
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packetQueue[queueIndex].data[3] = w;
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queueIndex++;
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}
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void sk6812_add_color(uint16_t module, uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
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packetQueue[queueIndex].action = ADD_COLOR;
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packetQueue[queueIndex].module = htons(module);
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packetQueue[queueIndex].data[0] = r;
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packetQueue[queueIndex].data[1] = g;
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packetQueue[queueIndex].data[2] = b;
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packetQueue[queueIndex].data[3] = w;
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queueIndex++;
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}
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void sk6812_set_fadestep(uint8_t fadestep) {
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packetQueue[queueIndex].action = SET_FADESTEP;
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packetQueue[queueIndex].data[0] = fadestep;
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queueIndex++;
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}
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int sk6812_commit(void) {
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if(send(sk6812_socket, packetQueue, queueIndex * sizeof(struct SK6812Packet), 0) == -1) {
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return 1;
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}
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queueIndex = 0;
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return 0;
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}
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void sk6812_shutdown() {
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close(sk6812_socket);
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}
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