2.5 Time Functions

2.5.1 void delay(ms);

• brief: delay several milliseconds.

• param:

  • ms: milliseconds to delay.

• return: void.

2.5.2 void delayMicroseconds(us);

• brief: delay several microseconds.

• param:

  • us: microseconds to delay.

• return: void.

2.5.3 unsigned long millis();

• brief: return the time length in milliseconds since the most recent rebooting. Clearly, the longest time that can be recorded is 2^32-1 milliseconds. After that, the time length will starts from 0 again.

• param:

  • void

• return: unsigned long.

2.5.4 unsigned long micros();

• brief: return the time length in microseconds since the most recent rebooting. Clearly, the longest time that can be recorded is 2^32-1 microseconds. After that, the time length will starts from 0 again.

• param:

  • void

• return: unsigned long.