【FireBeetle 2 ESP32 C6 开发板】+ 测试使用板载 core modules
<div class='showpostmsg'> 本帖最后由 ID.LODA 于 2024-5-23 15:05 编辑# Core Modules 的测试、使用
记上一章使用 Web Workflow 之后开发稳定性提高很多，今天来学习下 circuitpython core modules 的使用
## 查看板载支持的 modules
可以在 repl 或者 code.py 中输入 ``help("modules")`` 即可查看
## microcontroller
处理器模块的接口介绍可以查看以下章节 (https://docs.circuitpython.org/en/latest/shared-bindings/microcontroller/index.html)，包含了 unique id、cpu、frequency、temperature 等参数的获取，以及终端复位等的控制
### 示例演示
实现了 cpu 基础信息的获取
```python
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT
"""
This test will initialize the display using displayio and draw a solid green
background, a smaller purple rectangle, and some yellow text.
"""
import os
import time
import board
import digitalio
import microcontroller
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
cpu = microcontroller.cpu
print("cpu uid: ", )
print("cpu frequency: ", cpu.frequency)
print("cpu temperature: ", cpu.temperature)
print("cpu voltage: ", cpu.voltage)
print("cpu reset reason: ", cpu.reset_reason)
while True:
time.sleep(0.5)
led.value = not led.value
microcontroller.reset()
```
#### 结果展示
## WIFI
wifi 模块的接口介绍可以查看以下章节 (https://docs.circuitpython.org/en/latest/shared-bindings/wifi/index.html)，该模块为管理 wifi 连接提供了必要的底层功能，以及使用套接字池通过网络进行通信。
### 基础示例
实现了 WIFI 的连接，socket pool 的创建，域名解析以及 ping 包的实现
#### 示例代码
介于我在 settings.toml 里设置了 `CIRCUITPY_WIFI_SSID`、`CIRCUITPY_WIFI_PASSWORD`，通过 os.getenv 可以很方便的获取对应的数据
```python
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT
"""
This test will initialize the display using displayio and draw a solid green
background, a smaller purple rectangle, and some yellow text.
"""
import os
import time
import board
import digitalio
import socketpool
import wifi
import ipaddress
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
# code handler
while not wifi.radio.ipv4_address:
try:
print("Connecting to WiFi")
#connect to your SSID
wifi.radio.connect(os.getenv('CIRCUITPY_WIFI_SSID'), os.getenv('CIRCUITPY_WIFI_PASSWORD'))
except ConnectionError as e:
print("connect error:{}, retry in 2s".format(e))
time.sleep(2)
pool = socketpool.SocketPool(wifi.radio)
#prints IP address to REPL
print("My IP address is", wifi.radio.ipv4_address)
#prints MAC address to REPL
print("My MAC addr:", )
#pings eeworld
ip_address = pool.getaddrinfo("eeworld.com.cn", 80)[-1]
ipv4 = ipaddress.ip_address(ip_address)
print("Ping eeworld.com: %f ms" % (wifi.radio.ping(ipv4)*1000))
while True:
time.sleep(0.5)
led.value = not led.value
```
#### 运行结果
### http 请求示例
进行 http 请求依赖第三方库，可以在 (https://circuitpython.org/libraries) 根据对应的版本下载示例包，我这边使用的是 9.x，所以下载的 9.x 版本
#### 导入库
依赖 adafruit_connection_manager.mpy、adafruit_requests.mpy 库，将其导入 lib 目录即可
#### 示例代码
通过请求 https://www.adafruit.com/api/quotes.php，获取网页的内容，并打印
```python
# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import os
import time
import ssl
import wifi
import socketpool
import microcontroller
import adafruit_requests
#adafruit quotes URL
quotes_url = "https://www.adafruit.com/api/quotes.php"
#connect to SSID
wifi.radio.connect(os.getenv('CIRCUITPY_WIFI_SSID'), os.getenv('CIRCUITPY_WIFI_PASSWORD'))
pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool, ssl.create_default_context())
while True:
try:
#pings adafruit quotes
print("Fetching text from %s" % quotes_url)
#gets the quote from adafruit quotes
response = requests.get(quotes_url)
print("-" * 40)
#prints the response to the REPL
print("Text Response: ", response.text)
print("-" * 40)
response.close()
#delays for 1 minute
time.sleep(60)
# pylint: disable=broad-except
except Exception as e:
print("Error:\n", str(e))
print("Resetting microcontroller in 10 seconds")
time.sleep(10)
microcontroller.reset()
```
#### 运行结果
# 总结
circuitpython 内置了很多功能模块，官网也提供了对应的接口文档，相对还是比较上手使用
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