Time

Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.

Ethernet
Servo Motor
Stepping Motor
Character LCD
SPI
I²C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)
PPG (Pulse Generator)
WiFiEsp
ICS (Serial Servo)

Overview
Task
Queue
Timer
Interrupt Management

This library waits for and/or measures the specified time.

millis

Description

Returns the number of milliseconds since the GR-ROSE board began running the current program. This number will overflow (go back to zero), after approximately 50 days.

Syntax

unsigned long millis()

Parameters

None

Returns

Number of milliseconds since the program started (unsigned long)

micros

Description

Returns the number of microseconds since the GR-ROSE board began running the current program. This number will overflow (go back to zero), after approximately 70 minutes.

Syntax

unsigned long micros()

Parameters

None

Returns

Number of microseconds since the program started (unsigned long)

delay

Description

Pauses the program for the amount of time (in milliseconds) specified as parameter.

Syntax

delay(unsigned long ms)

Parameters

ms: The number of milliseconds to pause

Returns

None

Notes

Task switching is performed because the FreeRTOS vTaskDelay is used.

delayMicroseconds

Description

Pauses the program for the amount of time (in microseconds) specified as parameter.

Syntax

delayMicroseconds(unsigned long us)

Parameters

us: The number of microseconds to pause

Returns

None

Notes

Unlike with delay, task switching is not performed during stop because FreeRTOS vTaskDelay is not used.

Displays the time since program start in 100ms intervals via serial communications.

#include <Arduino.h>
#define INTERVAL 100
unsigned long val_time;
 
void setup()
{
    Serial.begin(9600);
}
 
void loop()
{
    val_time = millis();
    Serial.println( val_time );
    delay(INTERVAL);
}