rscmbbng
commented
2 years ago The pinouts don't match with what you declare. For example:
# | DC | gpio 0 | D3 | Data/Command control pin (High: Data; Low: Command) |dc = Pin(2)
Should be dc = Pin(0) etc
I am try to drive epaper with esp8266, but failed...
Hardware
Code
EPD 2in13 8PIN
ESP 8266 40PIN
#
| EPD 8PIN | 8266 GPIO | 8266 PIN | |
| -------- | --------- | -------- | ----------------------------------------------------------------- |
| VCC | | | 3.3V |
| GND | | | GND |
| DIN | gpio 13 | D7 | MOSI pin of SPI interface, data transmitted from Master to Slave. |
| CLK | gpio 14 | D5 | SCK pin of SPI interface, clock input |
| CS | gpio 15 | D8 | Chip select pin of SPI interface, Low active |
| DC | gpio 0 | D3 | Data/Command control pin (High: Data; Low: Command) |
| RST | gpio 2 | D4 | Reset pin, low active |
| BUSY | gpio 4 | D2 | Busy pin |
spi = SPI(1, baudrate=80000000, polarity=0, phase=0) cs = Pin(15) dc = Pin(2) rst = Pin(4) busy = Pin(5)
e = epaper2in13.EPD(spi, cs, dc, rst, busy) e.init()
w = 128 h = 250 x = 0 y = 0
--------------------
clear display
e.clear_frame_memory(b'\xFF') e.display_frame()
use a frame buffer
128 * 250 / 8 = 4000 - thats a lot of pixels
import framebuf buf = bytearray(128 250 // 8) fb = framebuf.FrameBuffer(buf, 128, 250, framebuf.MONO_HLSB) black = 0 white = 1 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(0,37): fb.text(str(row),0,row8,black) fb.text('Line 36',0,288,black) e.set_frame_memory(buf, x, y, w, h) e.display_frame()