【MicroPython ESP32】1.8“tft ST7735驱动3Dcube图形显示示例

【MicroPython ESP32】1.8“tft ST7735驱动3Dcube图形显示示例

---

• 本实例基于Thonny平台开发
• 效果演示（Gif录制，帧率上不来，有重影，实际效果没有，很流畅）
  

本示例借鉴了坛友三十岁开始学编程的大叔的《micropython 旋转立方体》：https://live.csdn.net/v/226877?spm=1001.2014.3001.5501

驱动屏幕和开发板

• 驱动屏幕采用的是合宙1.8"tft屏幕

1.8寸SPI串口模块TFT彩屏，16位彩色，分辨率：128*160，65K色，驱动IC：ST7735;

• 开发板采用的esp32Dev
  

接线说明

sck(SCL) =Pin(18)
mosi（SDA）=Pin(23)
dc = Pin(21)
cs = Pin(16)
rst（RES）= Pin(22)
BL--不接

1
2
3
4
5
6
7

MicroPython固件

• 采用的是带中文字库的固件，固件资源下载地址：https://github.com/kaixindelele/ssd1306-MicroPython-ESP32-Chinese/

根据个人开发板情况选择对应的固件,虽然本示例未使用字体，但是需要使用此固件才能运行，不然运行会报错。

ST7735驱动模块

• st7735.py代码（保存到MicroPython设备上）

from time import sleep_ms
from ustruct import pack
from machine import SPI,Pin
from micropython import const
import framebuf

#   ST7735V registers definitions

NOP     = const(0x00) # No Operation
SWRESET = const(0x01) # Software reset

SLPIN   = const(0x10) # Sleep in & booster off
SLPOUT  = const(0x11) # Sleep out & booster on
PTLON   = const(0x12) # Partial mode on
NORON   = const(0x13) # Partial off (Normal)

INVOFF  = const(0x20) # Display inversion off
INVON   = const(0x21) # Display inversion on
DISPOFF = const(0x28) # Display off
DISPON  = const(0x29) # Display on
CASET   = const(0x2A) # Column address set
RASET   = const(0x2B) # Row address set
RAMWR   = const(0x2C) # Memory write
RGBSET  = const(0x2D) # Display LUT set

PTLAR   = const(0x30) # Partial start/end address set
COLMOD  = const(0x3A) # Interface pixel format
MADCTL  = const(0x36) # Memory data access control

# panel function commands
FRMCTR1 = const(0xB1) # In normal mode (Full colors)
FRMCTR2 = const(0xB2) # In Idle mode (8-colors)
FRMCTR3 = const(0xB3) # In partial mode + Full colors
INVCTR  = const(0xB4) # Display inversion control

PWCTR1  = const(0xC0) # Power control settings
PWCTR2  = const(0xC1) # Power control settings
PWCTR3  = const(0xC2) # In normal mode (Full colors)
PWCTR4  = const(0xC3) # In Idle mode (8-colors)
PWCTR5  = const(0xC4) # In partial mode + Full colors
VMCTR1  = const(0xC5) # VCOM control

GMCTRP1 = const(0xE0)
GMCTRN1 = const(0xE1)



class ST7735(framebuf.FrameBuffer):
    def __init__(self, width, height, spi, dc, rst, cs, rot=0, bgr=0):
        if dc is None:
            raise RuntimeError('TFT must be initialized with a dc pin number')
        dc.init(dc.OUT, value=0)
        if cs is None:
            raise RuntimeError('TFT must be initialized with a cs pin number')
        cs.init(cs.OUT, value=1)
        if rst is not None:
            rst.init(rst.OUT, value=1)
        else:
            self.rst =None
        self.spi = spi
        self.rot = rot
        self.dc = dc
        self.rst = rst
        self.cs = cs
        self.height = height
        self.width = width
        self.buffer = bytearray(self.height * self.width*2)
        super().__init__(self.buffer, self.width, self.height, framebuf.RGB565SW, self.width)
        if (self.rot ==0):
            madctl=0x00
        elif (self.rot ==1):
            madctl=0xa0
        elif (self.rot ==2):
            madctl=0xc0
        else :
            madctl=0x60
        if bgr==0:
            madctl|=0x08
        self.madctl = pack('>B', madctl)
        self.reset()

        self._write(SLPOUT)
        sleep_ms(120)
        for command, data in (
            (COLMOD,  b"\x05"),
            (MADCTL,  pack('>B', madctl)),
            ):
            self._write(command, data)
        if self.width==80 or self.height==80:
            self._write(INVON, None)
        else:
            self._write(INVOFF, None)
        buf=bytearray(128)
        for i in range(32):
            buf[i]=i*2
            buf[i+96]=i*2
        for i in range(64):
            buf[i+32]=i
        self._write(RGBSET, buf)
        #self._write(NORON)
        #sleep_ms(10)
        self.show()
        self._write(DISPON)
        #sleep_ms(100)
    def reset(self):
        if self.rst is None:
            self._write(SWRESET)
            sleep_ms(50)
            return
        self.rst.off()
        sleep_ms(50)
        self.rst.on()
        sleep_ms(50)
    def _write(self, command, data = None):
        self.cs.off()
        self.dc.off()
        self.spi.write(bytearray([command]))
        self.cs.on()
        if data is not None:
            self.cs.off()
            self.dc.on()
            self.spi.write(data)
            self.cs.on()
    def show(self):
        if self.width==80 or self.height==80:
            if self.rot==0 or self.rot==2:
                self._write(CASET,pack(">HH", 26, self.width+26-1))
                self._write(RASET,pack(">HH", 1, self.height+1-1))
            else:
                self._write(CASET,pack(">HH", 1, self.width+1-1))
                self._write(RASET,pack(">HH", 26, self.height+26-1))
        else:
            if self.rot==0 or self.rot==2:
                self._write(CASET,pack(">HH", 0, self.width-1))
                self._write(RASET,pack(">HH", 0, self.height-1))
            else:
                self._write(CASET,pack(">HH", 0, self.width-1))
                self._write(RASET,pack(">HH", 0, self.height-1))
            
        self._write(RAMWR,self.buffer)
    def rgb(self,r,g,b):
        return ((r&0xf8)<<8)|((g&0xfc)<<3)|((b&0xf8)>>3)



1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

文件架构

• 运行代码前先上传st7735.py模块到Micropython设备上。
  

实例代码

from math import cos,sin,pi
from st7735 import ST7735
from machine import Pin,SPI


cube=[[-35,-35,-35],[-35,35,-35],[35,35,-35],[35,-35,-35],[-35,-35,35],[-35,35,35],[35,35,35],[35,-35,35]]
lineid=[1,2,2,3,3,4,4,1,5,6,6,7,7,8,8,5,8,4,7,3,6,2,5,1]

# 初始化SPI
spi=SPI(2, baudrate=20000000, polarity=0, phase=0, sck=Pin(18), mosi=Pin(23))

# 初始化LCD  rot 是显示方向，bgr是默认显示的颜色
lcd= ST7735 (128, 160, spi,dc=Pin(21),cs=Pin(16),rst=Pin(22),rot=2,bgr=0)

def matconv(a,matrix):
    res=[0,0,0]
    for i in range(0,3):
        res[i]=matrix[i][0]*a[0]+matrix[i][1]*a[1]+matrix[i][2]*a[2]
    for i in range(0,3):
        a[i]=res[i]
    return a

def rotate(obj,x,y,z):
    x=x/pi
    y=y/pi
    z=z/pi
    rz=[[cos(z),-sin(z),0],[sin(z),cos(z),0],[0,0,1]]
    ry=[[1,0,0],[0,cos(y),-sin(y)],[0,sin(y),cos(y)]]
    rx=[[cos(x),0,sin(x)],[0,1,0],[-sin(x),0,cos(x)]]
    matconv(matconv(matconv(obj,rz),ry),rx)
    
def drawcube(x,y,z):
    lcd.fill(0x9527)# 背景颜色
    for i in range(0,8):
        rotate(cube[i],x,y,z)
    for i in range(0,24,2):
        x1=int(64+cube[lineid[i]-1][0])
        y1=int(72+cube[lineid[i]-1][1])
        x2=int(64+cube[lineid[i+1]-1][0])
        y2=int(72+cube[lineid[i+1]-1][1])
        lcd.line(x1,y1,x2,y2,0xf88f)
        #print(64+cube[lineid[i]-1][0],32+cube[lineid[i]-1][1],64+cube[lineid[i+1]-1][0],32+cube[lineid[i+1]-1][1])
    lcd.show()
while True:
    drawcube(0.1,0.2,0.3)






1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51