当前位置：网站首页>Anti electronic ink screen st7302

Anti electronic ink screen st7302

2022-07-26 02:50:00 【Zhuoqing】

§01ST7302 Electronic screen

One 、 Background introduction

This kind of ST7302 It's from TB Purchased , Let's test its characteristics , Accumulate experience for later application .

-3-
The test platform adopts ESP32 Module adapter board Using it SPI Interface to test the function of the electronic screen . This module adapter board has hardware and software SPI Interface . application HSPI1, Corresponding to GPIO12,13,14, In addition, reset and data allocation IO, This is the corresponding allocation scheme .

-2-

Two 、 Build the test circuit

Build a test circuit on the bread board . This is the pin function description given in the device data manual .

3、 ... and 、 The test program

from machine                import Pin,SPI
import time

lcd_spi = SPI(1, 1000000)
lcd_dc = Pin(15, Pin.OUT)
lcd_cs = Pin(2, Pin.OUT)
lcd_res = Pin(27, Pin.OUT)

lcd_cs.on()
lcd_dc.on()
lcd_res.on()

def LCDWriteBus(dat):
   lcd_cs.off()
   lcd_spi.write(bytes([dat]))
   lcd_cs.on()

def LCDWriteData8(dat):
   LCDWriteBus(dat)

def LCDWriteData(dat):
   datbyte = dat.to_bytes(2, 1)
   LCDWriteData8(datbyte[0])
   LCDWriteData8(datbyte[1])

def LCDWriteReg(dat):
   lcd_dc.off()
   LCDWriteBus(dat)
   lcd_dc.on()

def LCDAddressSet(x1,y1,x2,y2):
   LCDWriteReg(0x2a)
   LCDWriteData8(x1+0x19)
   LCDWriteData8(x2+0x19)
   LCDWriteReg(0x2b)
   LCDWriteData8(y1)
   LCDWriteData8(y2)
   LCDWriteReg(0x2c)

def LCDInit():
   lcd_res.off()
   time.sleep_ms(100)
   lcd_res.on()
   time.sleep_ms(400)

   LCDWriteReg(0x38)
   LCDWriteReg(0xeb)
   LCDWriteData8(0x02)
   LCDWriteReg(0xd7)

   LCDWriteData8(0x68)
   LCDWriteReg(0xd1)
   LCDWriteData8(0x01)
   LCDWriteReg(0xc0)
   LCDWriteData8(0x80)
   LCDWriteReg(0xc1)

   LCDWriteData8(0x28)
   LCDWriteData8(0x28)
   LCDWriteData8(0x28)
   LCDWriteData8(0x28)
   LCDWriteData8(0x14)
   LCDWriteData8(0x00)

   LCDWriteReg(0xc2)
   LCDWriteData8(0x00)
   LCDWriteData8(0x00)
   LCDWriteData8(0x00)
   LCDWriteData8(0x00)

   LCDWriteReg(0xcb)
   LCDWriteData8(0x14)
   LCDWriteReg(0xb4)
   LCDWriteData8(0xe5)
   LCDWriteData8(0x77)
   LCDWriteData8(0xf1)
   LCDWriteData8(0xff)
   LCDWriteData8(0xff)
   LCDWriteData8(0x4f)
   LCDWriteData8(0xf1)
   LCDWriteData8(0xff)
   LCDWriteData8(0xff)
   LCDWriteData8(0x4f)

   LCDWriteReg(0x11)
   time.sleep_ms(100)

   LCDWriteReg(0xc7)
   LCDWriteData8(0xa6)
   LCDWriteData8(0xe9)

   LCDWriteReg(0xb0)
   LCDWriteData8(0x64)
   LCDWriteReg(0x36)
   LCDWriteData8(0x00)
   LCDWriteReg(0x3a)
   LCDWriteData8(0x11)
   LCDWriteReg(0xb9)
   LCDWriteData8(0x23)
   LCDWriteReg(0xb8)
   LCDWriteData8(0x09)
   LCDWriteReg(0x2a)
   LCDWriteData8(0x05)
   LCDWriteData8(0x36)

   LCDWriteReg(0x2b)
   LCDWriteData8(0x00)
   LCDWriteData8(0xc7)
   LCDWriteReg(0xd0)
   LCDWriteData8(0x1f)

   LCDWriteReg(0x29)
   LCDWriteReg(0xb9)
   LCDWriteData8(0xe3)
   time.sleep_ms(100)

   LCDWriteReg(0xb9)
   LCDWriteData8(0x23)
   LCDWriteReg(0x72)
   LCDWriteData8(0x00)

   LCDWriteReg(0x39)
   LCDWriteReg(0x2a)
   LCDWriteReg(0x19)
   LCDWriteData8(0x23)

   LCDWriteReg(0x2b)
   LCDWriteData8(0)
   LCDWriteData8(0x7c)
   LCDWriteData8(0x2c)

   time.sleep_ms(120)

def LCDFill(xsta, ysta, xend, yend, color):
   LCDAddressSet(xsta, ysta, xend-1, yend-1)

   for _ in range(5000):
       LCDWriteData8(color)

LCDInit()
LCDFill(0,0,10,0x7c, 0xf0)

buf = bytes([0x55, 0xa0])

count = 0
while True:

   count += 1
   time.sleep_ms(100)