【FireBeetle 2 ESP32 C6】micropython基本功能测试
<div class='showpostmsg'><p><a href="https://bbs.eeworld.com.cn/thread-1279403-1-1.html" target="_blank">下载micropython固件</a>后，先进行一些基本功能测试。</p><p> </p>
<p><strong>闪灯</strong></p>
<pre>
<code class="language-python">from machine import Pin
from time import sleep_ms
LED=Pin(15,Pin.OUT)
while 1:
LED(not LED())
sleep_ms(200)</code></pre>
<p> </p>
<p><strong>呼吸灯</strong>（使用定时器周期设置PWM占空比）</p>
<pre>
<code class="language-python">from machine import Pin, PWM, Timer
LED = PWM(Pin(15), freq=1000)
n = 0
def breathing(t):
global n
LED.duty(abs(1023- n*32))
n = (n + 1) % 64
T0 = Timer(0)
T0.init(period=50, mode=Timer.PERIODIC, callback=breathing)</code></pre>
<p> </p>
<p><strong>读取按键</strong></p>
<pre>
<code class="language-python">from machine import Pin
from time import sleep_ms
sw=Pin(9, Pin.IN)
while 1:
sw()
sleep_ms(200)</code></pre>
<p> </p>
<p>使用Signal方式读取按键（sw信号是通过电阻上拉到VCC的，按下时是低电平，释放时是高电平。直接读取时按下按钮是低，未按下时是高，逻辑上上反的，使用signal，就可以变为正逻辑）</p>
<pre>
<code class="language-python">from machine import Pin, Signal
from time import sleep_ms
sw=Signal(Pin(9, Pin.IN), invert=True)
while 1:
sw()
sleep_ms(200)</code></pre>
<p> </p>
<p><strong>按键中断</strong>，按下按钮翻转LED</p>
<pre>
<code class="language-python">from machine import Pin, Signal
sw=Pin(9, Pin.IN)
LED=Signal(Pin(15,Pin.OUT))
sw.irq(trigger=Pin.IRQ_FALLING, handler=lambda t: LED(not LED()))</code></pre>
<p> </p>
<p><strong>ADC</strong>（读取电池电压，如果未接入电池，输出为4.2V左右）</p>
<pre>
<code class="language-python">from machine import ADC, Pin
aVBAT = ADC(Pin(0), atten=ADC.ATTN_11DB)
def VBAT():
return aVBAT.read_uv()*2/1000000</code></pre>
<p> </p>
<p><strong>查看内部文件系统大小</strong></p>
<pre>
<code class="language-python">import os
os.statvfs('/')</code></pre>
<p>例如返回值是：(4096, 4096, 512, 509, 509, 0, 0, 0, 0, 255)</p>
<p source-line="84" source-line-end="85" style=" color: rgb(50, 55, 63); letter-spacing: normal; orphans: 2; widows: 2; word-spacing: 0px; white-space: normal; background-color: rgb(255, 255, 255)">磁盘大小：4096*512=2097152</p>
<p source-line="84" source-line-end="85" style=" color: rgb(50, 55, 63); letter-spacing: normal; orphans: 2; widows: 2; word-spacing: 0px; white-space: normal; background-color: rgb(255, 255, 255)"> 2097152/1024/1024=<strong>2.0M</strong></p>
<p source-line="88" source-line-end="89" style=" color: rgb(50, 55, 63); letter-spacing: normal; orphans: 2; widows: 2; word-spacing: 0px; white-space: normal; background-color: rgb(255, 255, 255)">剩余空间大小：4096*509=2084864</p>
<p source-line="90" source-line-end="91" style=" color: rgb(50, 55, 63); letter-spacing: normal; orphans: 2; widows: 2; word-spacing: 0px; white-space: normal; background-color: rgb(255, 255, 255)"> 2084864/1024**2=<strong>1.988281M</strong></p>
<p> </p>
<p><strong>搜索网络</strong></p>
<pre>
<code class="language-python">import network
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.scan()</code></pre>
<p>正常情况下，返回带有可见路由器信息的元组列表。</p>
<p> </p>
<p><strong>连接网络</strong></p>
<pre>
<code class="language-python">import network
w=network.WLAN(network.STA_IF)
w.active(1)
w.connect('ssid','password')
w.isconnected()</code></pre>
<p>注意替换上面的 siid 和 password。</p>
<p> </p>
<p><strong>ntptime</strong>（假设已经联网）</p>
<pre>
<code>>>> import ntptime
>>> ntptime.host
'pool.ntp.org'
>>> ntptime.utime.localtime()
(2000, 1, 1, 13, 30, 55, 5, 1)
>>> ntptime.settime()
>>> ntptime.utime.localtime()
(2024, 4, 26, 2, 55, 55, 4, 117)</code></pre>
<p> </p>
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