Golang and Arduino

Just copy following lines to begin of tinkercad code

#define LC_INIT(lc)
struct pt { unsigned short lc; };
#define PT_THREAD(name_args)  char name_args
#define PT_BEGIN(pt)          switch(pt->lc) { case 0:
#define PT_WAIT_UNTIL(pt, c)  pt->lc = __LINE__; case __LINE__: \
                              if(!(c)) return 0
#define PT_END(pt)            } pt->lc = 0; return 2
#define PT_INIT(pt)   LC_INIT((pt)->lc)

Simple program with 2 different delays

#define LC_INIT(lc)
struct pt { unsigned short lc; };
#define PT_THREAD(name_args) char name_args
#define PT_BEGIN(pt) switch(pt->lc) { case 0:
#define PT_WAIT_UNTIL(pt, c) pt->lc = __LINE__; case __LINE__: \
 if(!(c)) return 0
#define PT_END(pt) } pt->lc = 0; return 2
#define PT_INIT(pt) LC_INIT((pt)->lc)



struct pt pt1;
struct pt pt2;

void setup() {
 Serial.begin(9600);
 while(!Serial);
 PT_INIT(&pt1);
 PT_INIT(&pt2);
}

void loop() {
 test(&pt1);
 test2(&pt2);
}

unsigned long timeNow = 0;
PT_THREAD(test(struct pt *pt)) {
 PT_BEGIN(pt);
 timeNow = millis();
 PT_WAIT_UNTIL(pt, millis() - timeNow > 5000);
 Serial.println("print test1");
 PT_END(pt);
}


unsigned long timeNow2 = 0;
PT_THREAD(test2(struct pt *pt)) {
 PT_BEGIN(pt);
 timeNow2 = millis();
 PT_WAIT_UNTIL(pt, millis() - timeNow2 > 1000);
 Serial.println("print test2");
 PT_END(pt);
}

Thats it! Now you have pretty syntax instead of arduino millis() trick to delay tasks.

You can read more about protothreads http://dunkels.com/adam/pt/expansion.html