[实验] 树莓派 Pico W 点亮 1602 屏、连接 WiFi

scoopydoo

一不做二不休，俺要把手里的屏全都点亮一次！

树莓派 Pico W 链连上  WiFi 可以有很多玩法，俺的另一块 Pico W 被用于遥控俺的工作台照明灯了，用的 MQTT 协议。

老规矩，上代码 main.py：

1. import machine
   
2. import network
   
3. import time
   
4. import lcd1602_4bit
   
5. 
   
6. # Configure LED Pin as an output pin
   
7. led = machine.Pin('LED', machine.Pin.OUT)
   
8. 
   
9. # Initialize LCD pins
   
10. RS = machine.Pin(17, machine.Pin.OUT)
    
11. EN = machine.Pin(18, machine.Pin.OUT)
    
12. D4 = machine.Pin(22, machine.Pin.OUT)
    
13. D5 = machine.Pin(21, machine.Pin.OUT)
    
14. D6 = machine.Pin(26, machine.Pin.OUT)
    
15. D7 = machine.Pin(27, machine.Pin.OUT)
    
16. 
    
17. disp = lcd1602_4bit.LCD1602(RS, EN, D4, D5, D6, D7)
    
18. disp.Clear()
    
19. disp.WriteLine('RPi Pico W  DHCP', 1)
    
20. disp.WriteLine('Connecting ...', 2)
    
21. disp.CursorBlink()
    
22. 
    
23. # Replace these with your Wi-Fi credentials
    
24. SSID = "your_SSID"
    
25. PASSWORD = "your_password"
    
26. 
    
27. # Connect to Wi-Fi
    
28. wlan = network.WLAN(network.STA_IF)
    
29. wlan.active(True)
    
30. wlan.connect(SSID, PASSWORD)
    
31. 
    
32. # Wait for connection
    
33. while not wlan.isconnected():
    
34.     led.toggle()
    
35.     time.sleep(0.5)
    
36. 
    
37. # Connected
    
38. led.value(True)
    
39. disp.CursorOff()
    
40. disp.SetCursor(1, 0)
    
41. # Add extra spaces ensure correct display format
    
42. disp.WriteLine(wlan.ifconfig()[0] + 9*" ", 2)
    
43. 
    

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手里这个 1602 屏是并口的，在网上找了个 4bit 的驱动代码，基本没改，就加了最后那一小段设置光标位置的代码 lcd1602_4bit.py：

1. import utime
   
2. 
   
3. class LCD1602:
   
4.    
   
5.     def __init__(self, RS, EN, D4, D5, D6, D7):
   
6.         self.RS = RS
   
7.         self.EN = EN
   
8.         self.D4 = D4
   
9.         self.D5 = D5
   
10.         self.D6 = D6
    
11.         self.D7 = D7
    
12.         self.Reset()
    
13.    
    
14.     def Reset(self):
    
15.         self.RS.value(0)
    
16.         self.WriteCommand(0x03)
    
17.         self.WriteCommand(0x03)
    
18.         self.WriteCommand(0x03)
    
19.         
    
20.         #Initialize LCD into 4 bit mode
    
21.         self.WriteCommand(0x02)
    
22.         
    
23.         #Enable 5x7 character mode
    
24.         self.WriteCommand(0x28)
    
25.         
    
26.         #Cursor off
    
27.         self.WriteCommand(0x0C)
    
28.         
    
29.         #Increment cursor
    
30.         self.WriteCommand(0x06)
    
31.         
    
32.         #Clear screen
    
33.         self.WriteCommand(0x01)
    
34.         
    
35.         #Sleep for two mSeconds
    
36.         utime.sleep_ms(2)
    
37.      
    
38.     # Generate EnablePulse
    
39.     def EnablePulse(self):
    
40.         self.EN.value(1)
    
41.         utime.sleep_us(40)
    
42.         self.EN.value(0)
    
43.         utime.sleep_us(40)
    
44. 
    
45.     # Write a byte to LCD
    
46.     # Separate into 2 nibbles and then write to LCD
    
47.     def WriteByte(self, data):
    
48.        self.D4.value((data & 0b00010000) >>4)
    
49.        self.D5.value((data & 0b00100000) >>5)
    
50.        self.D6.value((data & 0b01000000) >>6)
    
51.        self.D7.value((data & 0b10000000) >>7)
    
52.        self.EnablePulse()
    
53.       
    
54.        self.D4.value((data & 0b00000001) >>0)
    
55.        self.D5.value((data & 0b00000010) >>1)
    
56.        self.D6.value((data & 0b00000100) >>2)
    
57.        self.D7.value((data & 0b00001000) >>3)
    
58.        self.EnablePulse()
    
59.       
    
60.     # Write a command to LCD
    
61.     def WriteCommand(self, data):
    
62.         # Disable Register Select
    
63.         self.RS.value(0)
    
64.         # Write Command Byte to LCD
    
65.         self.WriteByte(data)
    
66.         
    
67.     # Write a data to LCD
    
68.     def WriteData(self, data):
    
69.         # Enable Register Select
    
70.         self.RS.value(1)
    
71.         # Write Command Byte to LCD
    
72.         self.WriteByte(data)
    
73.         # Disable Register Select
    
74.         self.RS.value(0)
    
75.    
    
76.     # Writes a string into Line 1 or Line2
    
77.     def WriteLine(self, string, line_number):
    
78.         if(line_number == 1):
    
79.             self.WriteCommand(0x80)
    
80.             for x in string:
    
81.                 self.WriteData(ord(x))
    
82.         if(line_number == 2):
    
83.             self.WriteCommand(0xC0)
    
84.             for x in string:
    
85.                 self.WriteData(ord(x))   
    
86. 
    
87.     def Clear(self):
    
88.         self.WriteCommand(0x01)
    
89.         self.WriteCommand(0x02)
    
90.         # Clear screen and put the cursor into Home needs longer time
    
91.         # Introduce two mSeconds delay
    
92.         utime.sleep_ms(2)
    
93. 
    
94.     # Cursor On
    
95.     def CursorOn(self):
    
96.         self.WriteCommand(0x0E)
    
97. 
    
98.     # Cursor Blinking
    
99.     def CursorBlink(self):
    
100.         self.WriteCommand(0x0D)
     
101.         
     
102.     # Cursor Off
     
103.     def CursorOff(self):
     
104.         self.WriteCommand(0x0C)
     
105.    
     
106.     # Set cursor position
     
107.     def SetCursor(self, row, col):
     
108.         # Row 0 address starts at 0x00, Row 1 address starts at 0x40
     
109.         address = col + (0x40 if row else 0x00)
     
110.         # Set DDRAM address command
     
111.         self.WriteCommand(0x80 | address)
     
112. 
     

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JuncoJet

这WIFI这么丝滑
完全看不出来2片IC

scoopydoo

JuncoJet 发表于 2025-1-21 19:58
这WIFI这么丝滑
完全看不出来2片IC

树莓派 Pico W 上面的 WiFi 芯片是英飞凌的 CYW43439，俺对这颗芯片一无所知但是不耽误俺用它，这就是封装的魅力吧！

washu

皮可针不辍 燃鹅多年的 Basic 让我习惯了啥结构体都要写个 End 结尾 实在是不习惯 Python 有头无尾的语法

话说皮可也可以用 C 吧大湿

scoopydoo

washu 发表于 2025-1-22 00:32
皮可针不辍  燃鹅多年的 Basic 让我习惯了啥结构体都要写个 End 结尾  实在是不习惯 Python 有头无尾的 ...

前两天的实验代码就是用 C 写的啊 ...

http://www.crystalradio.cn/forum ... &extra=page%3D1