PYB Nano驅動OLED顯示

這是論壇網友hbzjt2012的做品:
http://www.micropython.org.cn/forum.php?mod=viewthread&tid=408&extra=

此次使用PYB Nano驅動0.96寸OLED顯示屏，這次參考了國外網友的例程，OLED可使用SPI或者I2C都可。

【1】硬件鏈接：
這裏以SPI鏈接方式爲例，使用PYB Nano的SPI1：

【2】程序源碼：
庫文件：SSD1306

import pyb
from ssd1306 import SSD1306

# SPI
display = SSD1306(pinout={'dc': 'Y9',
                          'res': 'Y10'},
                  height=64,
                  external_vcc=False)

# I2C connected to Y9, Y10 (I2C bus 2)
# display = SSD1306(pinout={'sda': 'Y10',
#                           'scl': 'Y9'},
#                   height=64,
#                   external_vcc=False)

led_red = pyb.LED(1)
led_red.off()

try:
  display.poweron()
  display.init_display()

  display.draw_text(1,1,'PYB Nano OLED Test',size=1,space=1)
  display.draw_text(1,10,'Hello MicroPython!',size=1,space=1)
  
  # Write display buffer
  display.display()
  pyb.delay(10000)

  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.set_pixel(prev_x, i, False)
      display.set_pixel(x, i, True)
    for i in range(128):
      display.set_pixel(i, prev_y, False)
      display.set_pixel(i, y, True)

    # Make sure the corners are active
    display.set_pixel(0,   0,  True)
    display.set_pixel(127, 0,  True)
    display.set_pixel(0,   63, True)
    display.set_pixel(127, 63, True)
    
    # Write display buffer
    display.display()

except Exception as ex:
  led_red.on()
  print('Unexpected error: {0}'.format(ex))
  display.poweroff()

【3】顯示效果：