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ESP-mp-01开发板I2C驱动OLED显示

已有 1047 次阅读2016-12-13 19:51 |个人分类:MicroPython

ESP-mp-01开发板是基于ESP8266 Soc的可以运行MicroPython的开发板，不像STM32版本的Pyboard，ESP8266本身没有USB，只能通过TTL串口和Wifi访问ESP8266。文件传输需要借助uPyLoader或ESPyHarp等工具来进行文件传输。此次使用开发板的I2C功能来驱动OLED显示。
【1】硬件连接：

ESP8266 I2C对应的引脚为Pin(14)--SCL，Pin(2)--SDA:
【2】程序源码：

# main.py -- put your code here!
import machine
from machine import Pin,I2C
import ssd1306
import math
import time
# construct an I2C bus
i2c = I2C(scl=Pin(14), sda=Pin(2), freq=100000)
display = ssd1306.SSD1306_I2C(128,64, i2c)
led_blue = machine.Pin(2, Pin.OUT) # 设置 GPIO2 为输出
led_blue.high()
try:
display.poweron()
display.init_display()
display.text('PYBNano I2C OLED',1,1)
display.text('Hi, MicroPython!',1,16)
display.text('By: hbzjt2012',1,31)
# Write display buffer
display.show()
time.sleep(10)
display.fill(0)
for x in range(0, 128):
display.pixel(x, 32+int(math.sin(x/64*math.pi)*7 + 8), 1)
display.show()
time.sleep(10)
display.fill(0)
x = 0
y = 0
direction_x = True
direction_y = True
while True:
# Clear the previous lines
prev_x = x
prev_y = y
# Move bars
x += (1 if direction_x else -1)
y += (1 if direction_y else -1)
# Bounce back, if required
if x == 128:
direction_x = False
x = 126
elif x == -1:
direction_x = True
x = 1
if y == 64:
direction_y = False
y = 63
elif y == -1:
direction_y = True
y = 1
# Draw new lines
for i in range(64):
display.pixel(prev_x, i, False)
display.pixel(x, i, True)
for i in range(128):
display.pixel(i, prev_y, False)
display.pixel(i, y, True)
# Make sure the corners are active
display.pixel(0, 0, True)
display.pixel(127, 0, True)
display.pixel(0, 63, True)
display.pixel(127, 63, True)
# Write display buffer
display.show()
except Exception as ex:
led_blue.low()
print('Unexpected error: {0}'.format(ex))
display.poweroff()

复制代码

【3】效果演示：

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