【得捷电子Follow me第4期】基础任务二
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本帖最后由 eew_uscYT9 于 2024-2-16 00:58 编辑
任务要求：主控板建立TCPIP或UDP服务器，局域网PC使用TCPIP或UDP客户端进行连接并发送数据，主控板接收到数据后，送液晶屏显示(没有则通过串口打印显示)；通过抓包软件抓取交互报文，展示并分析。(TCP和UDP二选一，或者全都操作)
参考官方代码建立了tcp服务器，代码如下
''' TCP Server example.
date: 2023-11-23
'''
from usocket import socket
from machine import Pin,SPI,UART,PWM
import time, network,framebuf
''' static netinfo
'''
ip = '192.168.1.20'
sn = '255.255.255.0'
gw = '192.168.1.1'
dns= '8.8.8.8'
BL = 13
DC = 8
RST = 12
MOSI = 11
SCK = 10
CS = 9
netinfo=(ip, sn, gw, dns)
localip = ''
localport = 8000
listen_info = (localip, localport)
conn_flag = False
''' uart0 init
baudrate: 115200
tx pin : gpio0
rx pin : gpio1
'''
uart = UART(0, 115200, tx=Pin(0), rx=Pin(1))
uart.init(115200, bits=8, parity=None, stop=1)
uart.write('WIZnet chip tcp server example.\r\n')
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)
def w5x00_init():
global localip
''' spi0 init
baudrate: 2000000
mosi pin: gpio19
miso pin: gpio16
sck pin: gpio18
cs pin: gpio17
rst pin: gpio20
'''
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)
# use dhcp, if fail use static netinfo
#try:
# nic.ifconfig('dhcp')
#except:
nic.ifconfig(netinfo)
localip = nic.ifconfig()[0]
print('ip :', nic.ifconfig()[0])
print('sn :', nic.ifconfig()[1])
print('gw :', nic.ifconfig()[2])
print('dns:', nic.ifconfig()[3])
uart.write('ip :{0}\r\n'.format(nic.ifconfig()[0]))
uart.write('sn :{0}\r\n'.format(nic.ifconfig()[1]))
uart.write('gw :{0}\r\n'.format(nic.ifconfig()[2]))
uart.write('dns:{0}\r\n'.format(nic.ifconfig()[3]))
while not nic.isconnected():
time.sleep(1)
# print(nic.regs())
print('no link')
uart.write('no link\r\n')
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)
LCD.text("Follow me NO.4",50,2,LCD.red)
LCD.show()
w5x00_init()
while True:
if(conn_flag == False):
s = socket()
s.bind(listen_info) # Source IP Address and Port
s.listen(5) # max conncet counts
conn_flag = True
print("TEST TCP server ")
conn, addr = s.accept()
print('Connect from %s' % str(addr))
LCD.text('Connect from',20,20,LCD.blue)
LCD.text('%s' % str(addr),20,40,LCD.blue)
LCD.show()
else:
try:
data = conn.recv(2048)
data = data.decode('utf-8')
data+='\r\n'
if data != 'NULL':
#conn.send(data)
LCD.text('data:',20,60,LCD.blue)
LCD.text(data,20,80,LCD.blue)
LCD.show()
except:
conn_flag = False
time.sleep(1)
LCD.fill(0xFFFF)
电脑进行发送消息，服务器能接收到
wireshark抓取信息如下图，抓取信息与发送信息一致
屏幕上显示接收到的信息
然后我在esp32s3上搭建了tcp客户端，进行数据的发送
服务器访问成功发送helloword
屏幕成功接收到信息，并显示出来
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