【得捷电子Follow me第4期】基础任务一(补充):ping通互联网站点
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本篇帖子是上一篇帖子【得捷电子Follow me第4期】基础任务的延续
5.ping通互联网站点
若使用开发板PING 到互联网网站的话,需要配置访问DNS服务器,具体介绍可以看这个视频:
3. W5100S/W5500+RP2040树莓派Pico MicroPython开发《DNS》_哔哩哔哩_bilibili
这里主要使用usocket. getaddrinfo 这个函数对DNS进行解析,
此函数在MICOpython中文WIKI的介绍如下:
体现在代码里为:
def dns_query(domain):
ip = usocket.getaddrinfo(domain, 80,0, usocket.SOCK_STREAM)
return ip[0][4][0]
在初始化之后进行调用dns_query函数可以得到服务器返回的IP地址,这里以百度为例:
ip = dns_query("www.baidu.com")
print("IP address is %s"%(ip))
结合前面的代码,将返回的IP地址显示在屏幕上:
from machine import Pin,SPI,PWM
import usocket
import network
import framebuf
import time
BL = 13
DC = 8
RST = 12
MOSI = 11
SCK = 10
CS = 9
def w5x00_init():
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K(spi,Pin(17),Pin(20))
nic.active(True)
nic.ifconfig(('192.168.2.114','255.255.255.0','192.168.2.1','8.8.8.8'))
print('IP address :', nic.ifconfig())
while not nic.isconnected():
time.sleep(1)
print(nic.regs())
def dns_query(domain):
ip = usocket.getaddrinfo(domain, 80,0, usocket.SOCK_STREAM)
return ip[0][4][0]
class LCD_1inch14(framebuf.FrameBuffer):
def __init__(self):
self.width = 240
self.height = 135
self.cs = Pin(CS,Pin.OUT)
self.rst = Pin(RST,Pin.OUT)
self.cs(1)
self.spi = SPI(1)
self.spi = SPI(1,1000_000)
self.spi = SPI(1,10000_000,polarity=0, phase=0,sck=Pin(SCK),mosi=Pin(MOSI),miso=None)
self.dc = Pin(DC,Pin.OUT)
self.dc(1)
self.buffer = bytearray(self.height * self.width * 2)
super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
self.init_display()
self.red = 0x07E0
self.green = 0x001f
self.blue = 0xf800
self.white = 0xffff
def write_cmd(self, cmd):
self.cs(1)
self.dc(0)
self.cs(0)
self.spi.write(bytearray([cmd]))
self.cs(1)
def write_data(self, buf):
self.cs(1)
self.dc(1)
self.cs(0)
self.spi.write(bytearray([buf]))
self.cs(1)
def init_display(self):
"""Initialize dispaly"""
self.rst(1)
self.rst(0)
self.rst(1)
self.write_cmd(0x36)
self.write_data(0x70)
self.write_cmd(0x3A)
self.write_data(0x05)
self.write_cmd(0xB2)
self.write_data(0x0C)
self.write_data(0x0C)
self.write_data(0x00)
self.write_data(0x33)
self.write_data(0x33)
self.write_cmd(0xB7)
self.write_data(0x35)
self.write_cmd(0xBB)
self.write_data(0x19)
self.write_cmd(0xC0)
self.write_data(0x2C)
self.write_cmd(0xC2)
self.write_data(0x01)
self.write_cmd(0xC3)
self.write_data(0x12)
self.write_cmd(0xC4)
self.write_data(0x20)
self.write_cmd(0xC6)
self.write_data(0x0F)
self.write_cmd(0xD0)
self.write_data(0xA4)
self.write_data(0xA1)
self.write_cmd(0xE0)
self.write_data(0xD0)
self.write_data(0x04)
self.write_data(0x0D)
self.write_data(0x11)
self.write_data(0x13)
self.write_data(0x2B)
self.write_data(0x3F)
self.write_data(0x54)
self.write_data(0x4C)
self.write_data(0x18)
self.write_data(0x0D)
self.write_data(0x0B)
self.write_data(0x1F)
self.write_data(0x23)
self.write_cmd(0xE1)
self.write_data(0xD0)
self.write_data(0x04)
self.write_data(0x0C)
self.write_data(0x11)
self.write_data(0x13)
self.write_data(0x2C)
self.write_data(0x3F)
self.write_data(0x44)
self.write_data(0x51)
self.write_data(0x2F)
self.write_data(0x1F)
self.write_data(0x1F)
self.write_data(0x20)
self.write_data(0x23)
self.write_cmd(0x21)
self.write_cmd(0x11)
self.write_cmd(0x29)
def show(self):
self.write_cmd(0x2A)
self.write_data(0x00)
self.write_data(0x28)
self.write_data(0x01)
self.write_data(0x17)
self.write_cmd(0x2B)
self.write_data(0x00)
self.write_data(0x35)
self.write_data(0x00)
self.write_data(0xBB)
self.write_cmd(0x2C)
self.cs(1)
self.dc(1)
self.cs(0)
self.spi.write(self.buffer)
self.cs(1)
if __name__=='__main__':
pwm = PWM(Pin(BL))
pwm.freq(1000)
pwm.duty_u16(32768)#max 65535
LCD = LCD_1inch14()
#color BRG
LCD.fill(LCD.white)
w5x00_init()
ip = dns_query("www.baidu.com")
print("IP address is %s"%(ip))
LCD.text("Follow me NO.4",20,20,LCD.red)
LCD.text("Basic Task 1:",20,40,LCD.green)
LCD.text("IP address is %s"%(ip),20,60,LCD.red)
LCD.text("by ee_jark",20,80,LCD.blue)
LCD.show()
time.sleep(1)
LCD.fill(0xFFFF)
此时开发板的屏幕上显示如图画面:
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