Difference between revisions of "5 Light up all kinds of LED"

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(Use mian.py)
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==Use mian.py==
 
==Use mian.py==
 +
*Prepare the following code into the main.py file. Unlike the previous one, this effect is continuous. It will make the light on and wait for one second before it goes off.
 +
 +
from machine import Pin
 +
import time
 +
led = Pin(18, Pin.OUT) # get a led on gpio 18.
 +
print('turn on')
 +
led.value(1) # turn on
 +
print('sleep 1s')
 +
time.sleep(1) # sleep 1s
 +
print('turn off')
 +
led.value(0) # turn off

Revision as of 23:42, 17 February 2019

Light up all kinds of LED

If Hello World is the beginning of religious programming for software programmers, Blink Led is the same for hardware programmers. All hardware programming starts with lighting a lamp.

So we started to prepare our hardware, and I was using a beta version 1.3. It is sufficient for the purposes of this chapter, and is common to subsequent boards. Therefore, we pay attention to progressive, first a lamp, and then a row of lights.

Ready.png

Use repl

  • Go into repl mode

Into repl.png

  • input (after selecting the text to copy, right-click in the black box and paste)
from machine import Pin
  • input again
Pin(18, Pin.OUT).value(1)

Light up.png

  • Make sure that one of the lights on the panel is lit

Light result.png

  • Just to make sure it's the light we're controlling,input
Pin(18, Pin.OUT).value(0)

Light down.png

  • That's when you see it go out

Light restore.png

Use mian.py

  • Prepare the following code into the main.py file. Unlike the previous one, this effect is continuous. It will make the light on and wait for one second before it goes off.
from machine import Pin
import time
led = Pin(18, Pin.OUT) # get a led on gpio 18.
print('turn on')
led.value(1) # turn on
print('sleep 1s')
time.sleep(1) # sleep 1s
print('turn off')
led.value(0) # turn off