Cannot display text on 2.66inch Model B #24
Description
I try to rotate EPD from 152x296 to 296x152 (line 6&7), but it doesn't works. Text can't display on EPD.
Here is my code(copy from example):
from machine import Pin, SPI
import framebuf
import utime
# Display resolution
EPD_WIDTH = 296
EPD_HEIGHT = 152
RST_PIN = 12
DC_PIN = 8
CS_PIN = 9
BUSY_PIN = 13
WF_PARTIAL_2IN66 =[
0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x40,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0A,0x00,0x00,0x00,0x00,0x00,0x02,0x01,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x22,0x22,0x22,0x22,0x22,0x22,
0x00,0x00,0x00,0x22,0x17,0x41,0xB0,0x32,0x36,
]
class EPD_2in9_B:
def __init__(self):
self.reset_pin = Pin(RST_PIN, Pin.OUT)
self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP)
self.cs_pin = Pin(CS_PIN, Pin.OUT)
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
self.lut = WF_PARTIAL_2IN66
self.spi = SPI(1)
self.spi.init(baudrate=4000_000)
self.dc_pin = Pin(DC_PIN, Pin.OUT)
self.buffer_black = bytearray(self.height * self.width // 8)
self.buffer_red = bytearray(self.height * self.width // 8)
self.imageblack = framebuf.FrameBuffer(self.buffer_black, self.width, self.height, framebuf.MONO_HLSB)
self.imagered = framebuf.FrameBuffer(self.buffer_red, self.width, self.height, framebuf.MONO_HLSB)
self.init()
def digital_write(self, pin, value):
pin.value(value)
def digital_read(self, pin):
return pin.value()
def delay_ms(self, delaytime):
utime.sleep(delaytime / 1000.0)
def spi_writebyte(self, data):
self.spi.write(bytearray(data))
def module_exit(self):
self.digital_write(self.reset_pin, 0)
# Hardware reset
def reset(self):
self.digital_write(self.reset_pin, 1)
self.delay_ms(50)
self.digital_write(self.reset_pin, 0)
self.delay_ms(2)
self.digital_write(self.reset_pin, 1)
self.delay_ms(50)
def send_command(self, command):
self.digital_write(self.dc_pin, 0)
self.digital_write(self.cs_pin, 0)
self.spi_writebyte([command])
self.digital_write(self.cs_pin, 1)
def send_data(self, data):
self.digital_write(self.dc_pin, 1)
self.digital_write(self.cs_pin, 0)
self.spi_writebyte([data])
self.digital_write(self.cs_pin, 1)
def SetWindow(self, x_start, y_start, x_end, y_end):
self.send_command(0x44)
self.send_data((x_start>>3) & 0x1f)
self.send_data((x_end>>3) & 0x1f)
self.send_command(0x45)
self.send_data(y_start&0xff)
self.send_data((y_start&0x100)>>8)
self.send_data((y_end&0xff))
self.send_data((y_end&0x100)>>8)
def SetCursor(self, x_start, y_start):
self.send_command(0x4E)
self.send_data(x_start & 0x1f)
self.send_command(0x4f)
self.send_data(y_start&0xff)
self.send_data((y_start&0x100)>>8)
def ReadBusy(self):
print('e-Paper busy')
utime.sleep_ms(50)
while(self.busy_pin.value() == 1): # 0: idle, 1: busy
utime.sleep_ms(10)
print('e-Paper busy release')
utime.sleep_ms(50)
def TurnOnDisplay(self):
self.send_command(0x20)
self.ReadBusy()
def init(self):
print('init')
self.reset()
self.ReadBusy()
self.send_command(0x12)
self.ReadBusy()#waiting for the electronic paper IC to release the idle signal
self.send_command(0x11)
self.send_data(0x03)
self.SetWindow(0, 0, self.width-1, self.height-1)
self.send_command(0x21) #resolution setting
self.send_data (0x00)
self.send_data (0x80)
self.SetCursor(0,0)
self.ReadBusy()
def display(self):
high = self.height
if( self.width % 8 == 0) :
wide = self.width // 8
else :
wide = self.width // 8 + 1
self.send_command(0x24) # high wide wide
# TODO:
for j in range(0, high):
for i in range(0, wide):
self.send_data(self.buffer_black[i + j * wide])
self.send_command(0x26)
for j in range(0, high):
for i in range(0, wide):
self.send_data(~self.buffer_red[i + j * wide])
self.TurnOnDisplay()
def Clear(self, colorblack, colorred):
high = self.height
if( self.width % 8 == 0) :
wide = self.width // 8
else :
wide = self.width // 8 + 1
self.send_command(0x24)
for j in range(0, high):
for i in range(0, wide):
self.send_data(colorblack)
self.send_command(0x26)
for j in range(0, high):
for i in range(0, wide):
self.send_data(~colorred)
self.TurnOnDisplay()
def sleep(self):
self.send_command(0X10) # deep sleep
self.send_data(0x01)
if __name__=='__main__':
epd = EPD_2in9_B()
epd.Clear(0xff, 0xff)
epd.imageblack.fill(0xff)
epd.imagered.fill(0xff)
epd.imageblack.text("Waveshare", 0, 0, 0x00)
epd.imagered.text("Waveshare",10, 20, 0)
epd.display()
epd.delay_ms(2000)
'''
epd.imagered.vline(10, 90, 40, 0x00)
epd.imagered.vline(90, 90, 40, 0x00)
epd.imageblack.hline(10, 90, 80, 0x00)
epd.imageblack.hline(10, 130, 80, 0x00)
epd.imagered.line(10, 90, 90, 130, 0x00)
epd.imageblack.line(90, 90, 10, 130, 0x00)
epd.display()
epd.delay_ms(2000)
epd.imageblack.rect(10, 150, 40, 40, 0x00)
epd.imagered.fill_rect(60, 150, 40, 40, 0x00)
epd.display()
epd.delay_ms(2000)
'''
epd.Clear(0xff, 0xff)
epd.delay_ms(2000)
print("sleep")
epd.sleep()