micropython驱动微雪2.13寸墨水屏（电子纸）
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原帖：https://forum.micropython.org/viewtopic.php?t=6319&p=35965 """ Example for 2.13 inch black & white & red Waveshare 2.13B E-ink screen Run on ESP32 Waveshare driver board (software SPI) Adapted by me -- April 2019 """ import epaper2in13b from machine import Pin, SPI # software SPI on ESP32 Waveshare driver board sck = Pin(13) mosi = Pin(14) cs = Pin(15) busy = Pin(25) rst = Pin(26) dc = Pin(27) # miso is not used but must be declared. Let's take any unused gpio: 12 miso = Pin(12) spi = SPI(baudrate=100000, polarity=0, phase=0, sck=sck, mosi=mosi, miso=miso) e = epaper2in13b.EPD(spi, cs, dc, rst, busy) e.init() w = 104 h = 212 x = 0 y = 0 # -------------------- # use a frame buffer # 212 * 104 / 8 = 2756 - that's some pixels import framebuf buf = bytearray(w * h // 8) fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_HLSB) black = 0 white = 1 fb.fill(white) # -------------------- # write hello world with black bg and white text # from toto import hello_world_dark from image_dark import hello_world_dark from image_light import hello_world_light print('Image dark') bufImage = hello_world_dark fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB) fb.blit(fbImage, 20, 2) bufImage = hello_world_light fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB) fb.blit(fbImage, 168, 2) # e.display_frame(buf) e.display_frame(buf, buf) # -------------------- # write hello world with white bg and black text print('Image light') #e.display_frame(hello_world_light) # -------------------- print('Frame buffer things') fb.fill(white) fb.text('Hello World',30,0,black) fb.pixel(30, 10, black) fb.hline(30, 30, 10, black) fb.vline(30, 50, 10, black) fb.line(30, 70, 40, 80, black) fb.rect(30, 90, 10, 10, black) fb.fill_rect(30, 110, 10, 10, black) for row in range(0,36): fb.text(str(row),0,row*8,black) fb.text('Line 36',0,288,black) #e.display_frame(buf) e.display_frame(buf, buf) # -------------------- # wrap text inside a box black = 0 white = 1 # clear fb.fill(white) # display as much as this as fits in the box str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vel neque in elit tristique vulputate at et dui. Maecenas nec felis lectus. Pellentesque sit amet facilisis dui. Maecenas ac arcu euismod, tempor massa quis, ultricies est.' # this could be useful as a new method in FrameBuffer def text_wrap(str,x,y,color,w,h,border=None): # optional box border if border is not None: fb.rect(x, y, w, h, border) cols = w // 8 # for each row j = 0 for i in range(0, len(str), cols): # draw as many chars fit on the line fb.text(str[i:i+cols], x, y + j, color) j += 8 # dont overflow text outside the box if j >= h: break # clear fb.fill(white) # draw text box 1 # box position and dimensions print('Box 1') bx = 8 by = 8 bw = 112 # = 14 cols bh = 112 # = 14 rows (196 chars in total) text_wrap(str,bx,by,black,bw,bh,black) #e.display_frame(buf) e.display_frame(buf, buf) # draw text box 2 print('Box 2 & 3') bx = 0 by = 128 bw = w # 128 = 16 cols bh = 6 * 8 # 48 = 6 rows (96 chars in total) text_wrap(str,bx,by,black,bw,bh,black) # draw text box 3 bx = 0 by = 184 bw = w//2 # 64 = 8 cols bh = 8 * 8 # 64 = 8 rows (64 chars in total) text_wrap(str,bx,by,black,bw,bh,None) #e.display_frame(buf) e.display_frame(buf, buf) # -------------------- 复制代码
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