10. TIMER Example

1. Overview

The K230 contains 6 Timer hardware modules with a minimum timing period of 1 microsecond. These timers enable precise timing and periodic tasks.

2. Example

The following example demonstrates how to use the Timer module for timing operations.

from machine import Timer
import time

# Instantiate a software timer
tim = Timer(-1)

# Initialize the timer in one-shot mode with a period of 100ms
tim.init(period=100, mode=Timer.ONE_SHOT, callback=lambda t: print(1))
time.sleep(0.2)

# Initialize the timer in periodic mode with a frequency of 1Hz
tim.init(freq=1, mode=Timer.PERIODIC, callback=lambda t: print(2))
time.sleep(2)

# Release timer resources
tim.deinit()

3. Code Explanation

1. Instantiate Timer:

   • Create a Timer object, -1 indicates using a software timer.

2. One-shot Mode Timer:

   • Use tim.init(period=100, mode=Timer.ONE_SHOT, callback=lambda t: print(1)) to initialize the timer with a period of 100 milliseconds. The callback function will output 1 when the timer expires.

3. Delay:

   • time.sleep(0.2) pauses for 200 milliseconds to ensure the timer callback output can be observed.

4. Periodic Mode Timer:

   • Use tim.init(freq=1, mode=Timer.PERIODIC, callback=lambda t: print(2)) to initialize the timer with a frequency of 1Hz. The timer triggers the callback every second, outputting 2.

5. Another Delay:

   • time.sleep(2) pauses for 2 seconds to observe the output of the periodic mode timer.

6. Release Resources:

   • Call tim.deinit() to release timer resources and stop all timer operations.

Note

For detailed Timer module interfaces, please refer to the API Documentation