Esp8266+ssd1306液晶屏+microPython(2
2020-09-26 本文已影响0人
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ssd1306_test.py 保存后上传到芯片根文件夹就可
# 0.96英寸 ssd1306 液晶显示屏
# Esp8266的Pin5一般指芯片上的D1针脚、Pin4一般是指D2针脚
from machine import Pin,I2C
import ssd1306
import time
i2c = I2C(scl=Pin(5), sda=Pin(4), freq=100000) #Init i2c 如果是esp8266，SCL接5口、SDA接4口
#i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000) #Init i2c 如果是esp32，SCL接22口、SDA接21口
lcd=ssd1306.SSD1306_I2C(128,64,i2c) #create LCD object,Specify col and row
lcd.text("SSD1306 Test",0,0) #在指定坐标显示内容
lcd.text("12345678ABCDEFGH",0,16)
lcd.text("abcdefgh,.?!@#$%",0,26)
# 功能演示：
lcd.pixel(127,0,1) #画点： X坐标，y坐标
lcd.hline(0,40,15,1) #画横线： X坐标，y坐标，宽度多少像素，颜色1
lcd.vline(20,40,15,1) #画竖线： X坐标，y坐标，高度多少像素，颜色1
lcd.line(32,40, 48,55, 1) #画两点之间的线：起点Xy坐标，终点xy坐标，颜色1
lcd.rect(60,40, 20,15, 1) #画矩形： X坐标，y坐标，宽度，调试，颜色1
lcd.fill_rect(84,40, 20,15, 1) #画矩形并填充： X坐标，y坐标，宽度，调试，颜色1
#lcd.scroll(10,10) #图像复制移位： 右移几个像素、下移几个像素
#正式显示
lcd.show()
以下代码为：ssd1306.py 存为这个文件名，并上传到芯片的lib文件夹下：
# MicroPython SSD1306 OLED driver, I2C and SPI interfaces
from micropython import const
import time
import framebuf
import sys
currentBoard=""
if(sys.platform=="esp8266"):
currentBoard="esp8266"
elif(sys.platform=="esp32"):
currentBoard="esp32"
elif(sys.platform=="pyboard"):
currentBoard="pyboard"
import pyb
# register definitions
SET_CONTRAST = const(0x81)
SET_ENTIRE_ON = const(0xa4)
SET_NORM_INV = const(0xa6)
SET_DISP = const(0xae)
SET_MEM_ADDR = const(0x20)
SET_COL_ADDR = const(0x21)
SET_PAGE_ADDR = const(0x22)
SET_DISP_START_LINE = const(0x40)
SET_SEG_REMAP = const(0xa0)
SET_MUX_RATIO = const(0xa8)
SET_COM_OUT_DIR = const(0xc0)
SET_DISP_OFFSET = const(0xd3)
SET_COM_PIN_CFG = const(0xda)
SET_DISP_CLK_DIV = const(0xd5)
SET_PRECHARGE = const(0xd9)
SET_VCOM_DESEL = const(0xdb)
SET_CHARGE_PUMP = const(0x8d)
class SSD1306:
def __init__(self, width, height, external_vcc):
self.width = width
self.height = height
self.external_vcc = external_vcc
self.pages = self.height // 8
self.buffer = bytearray(self.pages * self.width)
self.framebuf = framebuf.FrameBuffer(self.buffer, self.width, self.height, framebuf.MVLSB)
self.poweron()
self.init_display()
def init_display(self):
for cmd in (
SET_DISP | 0x00, # off
# address setting
SET_MEM_ADDR, 0x00, # horizontal
# resolution and layout
SET_DISP_START_LINE | 0x00,
SET_SEG_REMAP | 0x01, # column addr 127 mapped to SEG0
SET_MUX_RATIO, self.height - 1,
SET_COM_OUT_DIR | 0x08, # scan from COM[N] to COM0
SET_DISP_OFFSET, 0x00,
SET_COM_PIN_CFG, 0x02 if self.height == 32 else 0x12,
# timing and driving scheme
SET_DISP_CLK_DIV, 0x80,
SET_PRECHARGE, 0x22 if self.external_vcc else 0xf1,
SET_VCOM_DESEL, 0x30, # 0.83*Vcc
# display
SET_CONTRAST, 0xff, # maximum
SET_ENTIRE_ON, # output follows RAM contents
SET_NORM_INV, # not inverted
# charge pump
SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14,
SET_DISP | 0x01): # on
self.write_cmd(cmd)
self.fill(0)
self.show()
def poweroff(self):
self.write_cmd(SET_DISP | 0x00)
def contrast(self, contrast):
self.write_cmd(SET_CONTRAST)
self.write_cmd(contrast)
def invert(self, invert):
self.write_cmd(SET_NORM_INV | (invert & 1))
def show(self):
x0 = 0
x1 = self.width - 1
if self.width == 64:
# displays with width of 64 pixels are shifted by 32
x0 += 32
x1 += 32
self.write_cmd(SET_COL_ADDR)
self.write_cmd(x0)
self.write_cmd(x1)
self.write_cmd(SET_PAGE_ADDR)
self.write_cmd(0)
self.write_cmd(self.pages - 1)
self.write_data(self.buffer)
def fill(self, col):
self.framebuf.fill(col)
def pixel(self, x, y, col):
self.framebuf.pixel(x, y, col)
def scroll(self, dx, dy):
self.framebuf.scroll(dx, dy)
def text(self, string, x, y, col=1):
self.framebuf.text(string, x, y, col)
def hline(self, x, y, w, col):
self.framebuf.hline(x, y, w, col)
def vline(self, x, y, h, col):
self.framebuf.vline(x, y, h, col)
def line(self, x1, y1, x2, y2, col):
self.framebuf.line(x1, y1, x2, y2, col)
def rect(self, x, y, w, h, col):
self.framebuf.rect(x, y, w, h, col)
def fill_rect(self, x, y, w, h, col):
self.framebuf.fill_rect(x, y, w, h, col)
def blit(self, fbuf, x, y):
self.framebuf.blit(fbuf, x, y)
class SSD1306_I2C(SSD1306):
def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
self.i2c = i2c
self.addr = addr
self.temp = bytearray(2)
super().__init__(width, height, external_vcc)
def write_cmd(self, cmd):
self.temp[0] = 0x80 # Co=1, D/C#=0
self.temp[1] = cmd
#IF SYS :
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.i2c.writeto(self.addr, self.temp)
elif currentBoard=="pyboard":
self.i2c.send(self.temp,self.addr)
#ELSE:
def write_data(self, buf):
self.temp[0] = self.addr << 1
self.temp[1] = 0x40 # Co=0, D/C#=1
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.i2c.start()
self.i2c.write(self.temp)
self.i2c.write(buf)
self.i2c.stop()
elif currentBoard=="pyboard":
#self.i2c.send(self.temp,self.addr)
#self.i2c.send(buf,self.addr)
self.i2c.mem_write(buf,self.addr,0x40)
def poweron(self):
pass
class SSD1306_SPI(SSD1306):
def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
self.rate = 10 * 1024 * 1024
dc.init(dc.OUT, value=0)
res.init(res.OUT, value=0)
cs.init(cs.OUT, value=1)
self.spi = spi
self.dc = dc
self.res = res
self.cs = cs
super().__init__(width, height, external_vcc)
def write_cmd(self, cmd):
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.spi.init(baudrate=self.rate, polarity=0, phase=0)
elif currentBoard=="pyboard":
self.spi.init(mode = pyb.SPI.MASTER,baudrate=self.rate, polarity=0, phase=0)
self.cs.high()
self.dc.low()
self.cs.low()
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.spi.write(bytearray([cmd]))
elif currentBoard=="pyboard":
self.spi.send(bytearray([cmd]))
self.cs.high()
def write_data(self, buf):
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.spi.init(baudrate=self.rate, polarity=0, phase=0)
elif currentBoard=="pyboard":
self.spi.init(mode = pyb.SPI.MASTER,baudrate=self.rate, polarity=0, phase=0)
self.cs.high()
self.dc.high()
self.cs.low()
global currentBoard
if currentBoard=="esp8266" or currentBoard=="esp32":
self.spi.write(buf)
elif currentBoard=="pyboard":
self.spi.send(buf)
self.cs.high()
def poweron(self):
self.res.high()
time.sleep_ms(1)
self.res.low()
time.sleep_ms(10)
self.res.high()
