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tools/simMain.cpp

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+// main.cpp
+// Lets Arduino RadioHead sketches run within a simulator on Linux as a single process
+// Copyright (C) 2014 Mike McCauley
+// $Id: simMain.cpp,v 1.3 2020/08/05 04:32:19 mikem Exp mikem $
+
+#include <RadioHead.h>
+#if (RH_PLATFORM == RH_PLATFORM_UNIX) 
+
+#include <stdio.h>
+#include <RHutil/simulator.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <time.h>
+
+SerialSimulator Serial;
+
+// Functions we expect to find in the sketch
+extern void setup();
+extern void loop();
+
+// Millis at the start of the process
+unsigned long start_millis;
+
+int    _simulator_argc;
+char** _simulator_argv;
+
+// Returns milliseconds since beginning of day
+unsigned long time_in_millis()
+{    
+    struct timeval te; 
+    gettimeofday(&te, NULL); // get current time
+    unsigned long milliseconds = te.tv_sec*1000LL + te.tv_usec/1000; // caclulate milliseconds
+    return milliseconds;
+}
+
+// Run the Arduino standard functions in the main loop
+int main(int argc, char** argv)
+{
+    // Let simulated program have access to argc and argv
+    _simulator_argc = argc;
+    _simulator_argv = argv;
+    start_millis = time_in_millis();
+    // Seed the random number generator
+    srand(getpid() ^ (unsigned) time(NULL)/2);
+    setup();
+    while (1)
+	loop();
+}
+
+void delay(unsigned long ms)
+{
+    usleep(ms * 1000);
+}
+
+// Arduino equivalent, milliseconds since process start
+unsigned long millis()
+{
+    return time_in_millis() - start_millis;
+}
+
+long random(long from, long to)
+{
+    return from + (random() % (to - from));
+}
+
+long random(long to)
+{
+    return random(0, to);
+}
+
+#endif