91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
#include <iostream>
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#include <windows.h>
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#include <thread>
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#include <chrono>
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void generateRandomColors(unsigned char& r, unsigned char& g, unsigned char& b);
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void sendDMXData(HANDLE hSerial, unsigned char* data, int length) {
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// Start with a DMX break condition
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EscapeCommFunction(hSerial, SETBREAK);
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std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Break duration
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EscapeCommFunction(hSerial, CLRBREAK);
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std::this_thread::sleep_for(std::chrono::milliseconds(1)); // Mark-after-break duration
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// Write the start code followed by the DMX data
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DWORD bytesWritten;
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unsigned char startCode = 0;
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WriteFile(hSerial, &startCode, 1, &bytesWritten, NULL);
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WriteFile(hSerial, data, length, &bytesWritten, NULL);
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}
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int main() {
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// Open the serial port
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HANDLE hSerial = CreateFileA("\\\\.\\COM3", GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (hSerial == INVALID_HANDLE_VALUE) {
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std::cerr << "Error opening COM3 port" << std::endl;
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return 1;
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}
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// Configure the serial port
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DCB dcbSerialParams = { 0 };
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dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
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if (!GetCommState(hSerial, &dcbSerialParams)) {
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std::cerr << "Error getting COM3 state" << std::endl;
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CloseHandle(hSerial);
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return 1;
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}
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dcbSerialParams.BaudRate = 250000; // DMX512 uses 250000 baud
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dcbSerialParams.ByteSize = 8;
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dcbSerialParams.StopBits = TWOSTOPBITS; // DMX512 uses 2 stop bits
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dcbSerialParams.Parity = NOPARITY;
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if (!SetCommState(hSerial, &dcbSerialParams)) {
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std::cerr << "Error setting COM3 state" << std::endl;
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CloseHandle(hSerial);
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return 1;
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}
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// Set timeouts
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COMMTIMEOUTS timeouts = { 0 };
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timeouts.ReadIntervalTimeout = 50;
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timeouts.ReadTotalTimeoutConstant = 50;
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timeouts.ReadTotalTimeoutMultiplier = 10;
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timeouts.WriteTotalTimeoutConstant = 50;
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timeouts.WriteTotalTimeoutMultiplier = 10;
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if (!SetCommTimeouts(hSerial, &timeouts)) {
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std::cerr << "Error setting COM3 timeouts" << std::endl;
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CloseHandle(hSerial);
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return 1;
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}
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srand(static_cast<unsigned int>(time(nullptr)));
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// DMX data (512 channels, all set to 255)
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const int num_channels = 512;
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unsigned char buffer[num_channels];
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memset(buffer, 255, sizeof(buffer)); // Fill the buffer with 255
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// Send DMX data in an infinite loop
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while (true) {
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// Generate and send random colors for channels 1, 2, and 3
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generateRandomColors(buffer[0], buffer[1], buffer[2]);
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// Send DMX data with random colors
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sendDMXData(hSerial, buffer, num_channels);
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std::this_thread::sleep_for(std::chrono::milliseconds(25)); // DMX refresh rate
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}
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// Close the serial port
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CloseHandle(hSerial);
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return 0;
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}
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void generateRandomColors(unsigned char& r, unsigned char& g, unsigned char& b) {
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r = rand() % 256;
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g = rand() % 256;
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b = rand() % 256;
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} |