マイクロビットでI2C電子ペーパモジュールを使ってみる

マイクロビットでI2C電子ペーパーモジュールを使ってみます。

今回使用するモジュールはWaveShare 1.9インチ 91セグメント I2C電子ペーパモジュール(以後、e-paperと略す)で、これから記載するコードは公式サイトで配布されているラズベリーパイ用のMicroPythonのコードをマイクロビット用に書き換えたものになります。

1.9インチ 91セグメント I2C電子ペーパモジュール — スイッチサイエンス

配線はマイクロビットに拡張ボードをかまし

e-paper	microbit
VCC	3.3V
GND	GND
SDA	GPIO 20
SCL	GPIO 19
RST	GPIO 0
BUSY	GPIO 1

にします。

from microbit import *

RST_PIN = pin0
BUSY_PIN = pin1

ADDS_COM   = 60
ADDS_DATA  = 61

VAR_Temperature = 20

class EPD:
	def reset(self):
		RST_PIN.write_digital(1)
		sleep(200)
		RST_PIN.write_digital(0)
		sleep(20)
		RST_PIN.write_digital(1)
		sleep(200) 

	def send_command(self, i):
		i2c.write(ADDS_COM, bytes([i]))
		sleep(1)

	def send_data(self, i):
		i2c.write(ADDS_DATA, bytes([i]))
		sleep(1)
				
	def ReadBusy(self):
		while(BUSY_PIN.read_digital() == 0):	  # 0: idle, 1: busy
			sleep(1)
		sleep(10)
			
	
	# DU waveform white extinction diagram + black out diagram
	# Bureau of brush waveform
	def lut_DU_WB(self):
		self.send_command(0x82)
		self.send_command(0x80)
		self.send_command(0x00)
		self.send_command(0xC0)
		self.send_command(0x80)
		self.send_command(0x80)
		self.send_command(0x62) 
	   
	# GC waveform
	# The brush waveform
	def lut_GC(self):
		self.send_command(0x82)
		self.send_command(0x20)
		self.send_command(0x00)
		self.send_command(0xA0)
		self.send_command(0x80)
		self.send_command(0x40)
		self.send_command(0x63)
	   
	# 5 waveform  better ghosting
	# Boot waveform
	def lut_5S(self):
		self.send_command(0x82)
		self.send_command(0x28)
		self.send_command(0x20)
		self.send_command(0xA8)
		self.send_command(0xA0)
		self.send_command(0x50)
		self.send_command(0x65) 
			
	 # temperature measurement
	# You are advised to periodically measure the temperature and modify the driver parameters
	# If an external temperature sensor is available, use an external temperature sensor
	def Temperature(self):
		if ( VAR_Temperature < 10 ):
			self.send_command(0x7E)
			self.send_command(0x81)
			self.send_command(0xB4)
		else: 
			self.send_command(0x7b)
			self.send_command(0x81)
			self.send_command(0xB4) 
		
		self.ReadBusy()		
		self.send_command(0xe7)	# Set default frame time
		
		# Set default frame time
		if (VAR_Temperature<5):
			self.send_command(0x31) # 0x31  (49+1)*20ms=1000ms
		elif (VAR_Temperature<10):
			self.send_command(0x22) # 0x22  (34+1)*20ms=700ms
		elif (VAR_Temperature<15):
			self.send_command(0x18) # 0x18  (24+1)*20ms=500ms
		elif (VAR_Temperature<20):
			self.send_command(0x13) # 0x13  (19+1)*20ms=400ms
		else:
			self.send_command(0x0e) # 0x0e  (14+1)*20ms=300ms
							
	# Note that the size and frame rate of V0 need to be set during initialization, 
	# otherwise the local brush will not be displayed
	def init(self):
		i2c.init()
		
		self.reset()
		
		self.send_command(0x2B) # POWER_ON
		sleep(10)
		self.send_command(0xA7) # boost
		self.send_command(0xE0) # TSON 
		sleep(10)
		self.Temperature()
		
	def Write_Screen(self, image):
		self.send_command(0xAC) # Close the sleep
		self.send_command(0x2B) # turn on the power
		self.send_command(0x40) # Write RAM address
		self.send_command(0xA9) # Turn on the first SRAM
		self.send_command(0xA8) # Shut down the first SRAM
		
		for j in range(0, 15):
			self.send_data(image[j])
		
		self.send_data(0x00)
		self.send_command(0xAB) # Turn on the second SRAM
		self.send_command(0xAA) # Shut down the second SRAM
		self.send_command(0xAF) # display on
		self.ReadBusy()
		# IIC.delay_ms(2000)
		self.send_command(0xAE) # display off
		self.send_command(0x28) # HV OFF
		self.send_command(0xAD) # sleep in	
		
	   
	def Write_Screen1(self, image):
		self.send_command(0xAC) # Close the sleep
		self.send_command(0x2B) # turn on the power
		self.send_command(0x40) # Write RAM address
		self.send_command(0xA9) # Turn on the first SRAM
		self.send_command(0xA8) # Shut down the first SRAM
		
		for j in range(0, 15):
			self.send_data(image[j])
			
		self.send_data(0x03)
		
		self.send_command(0xAB) # Turn on the second SRAM
		self.send_command(0xAA) # Shut down the second SRAM
		self.send_command(0xAF) # display on
		self.ReadBusy()
		# IIC.delay_ms(2000)
		self.send_command(0xAE) # display off
		self.send_command(0x28) # HV OFF
		self.send_command(0xAD) # sleep in	
		
	def sleep(self):
		self.send_command(0x28) # POWER_OFF
		self.ReadBusy()
		self.send_command(0xAC) # DEEP_SLEEP
		
		sleep(2000)
		RST_PIN.write_digital(0)

DSPNUM_WB = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]  # black
DSPNUM_WW = [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]  # white
DSPNUM_WB = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]  # All black font
DSPNUM_W0 = [0x00, 0xbf, 0x1f, 0xbf, 0x1f, 0xbf, 0x1f, 0xbf, 0x1f, 0xbf, 0x1f, 0xbf, 0x1f, 0x00, 0x00]  # 0
DSPNUM_W1 = [0xff, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x00, 0x00]  # 1
DSPNUM_W2 = [0x00, 0xfd, 0x17, 0xfd, 0x17, 0xfd, 0x17, 0xfd, 0x17, 0xfd, 0x17, 0xfd, 0x37, 0x00, 0x00]  # 2
DSPNUM_W3 = [0x00, 0xf5, 0x1f, 0xf5, 0x1f, 0xf5, 0x1f, 0xf5, 0x1f, 0xf5, 0x1f, 0xf5, 0x1f, 0x00, 0x00]  # 3
DSPNUM_W4 = [0x00, 0x47, 0x1f, 0x47, 0x1f, 0x47, 0x1f, 0x47, 0x1f, 0x47, 0x1f, 0x47, 0x3f, 0x00, 0x00]  # 4
DSPNUM_W5 = [0x00, 0xf7, 0x1d, 0xf7, 0x1d, 0xf7, 0x1d, 0xf7, 0x1d, 0xf7, 0x1d, 0xf7, 0x1d, 0x00, 0x00]  # 5
DSPNUM_W6 = [0x00, 0xff, 0x1d, 0xff, 0x1d, 0xff, 0x1d, 0xff, 0x1d, 0xff, 0x1d, 0xff, 0x3d, 0x00, 0x00]  # 6
DSPNUM_W7 = [0x00, 0x21, 0x1f, 0x21, 0x1f, 0x21, 0x1f, 0x21, 0x1f, 0x21, 0x1f, 0x21, 0x1f, 0x00, 0x00]  # 7
DSPNUM_W8 = [0x00, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x1f, 0xff, 0x3f, 0x00, 0x00]  # 8
DSPNUM_W9 = [0x00, 0xf7, 0x1f, 0xf7, 0x1f, 0xf7, 0x1f, 0xf7, 0x1f, 0xf7, 0x1f, 0xf7, 0x1f, 0x00, 0x00]  # 9

number_0 = [0xbf, 0x1f]
number_1 = [0x1f, 0x00]
number_2 = [0xfd, 0x17]
number_3 = [0xf5, 0x1f]
number_4 = [0x47, 0x1f]
number_5 = [0xf7, 0x1d]
number_6 = [0xff, 0x1d]
number_7 = [0x21, 0x1f]
number_8 = [0xff, 0x1f]
number_9 = [0xf7, 0x1f]
number = [[0xbf, 0x1f], [0x1f, 0x00], [0xfd, 0x17], [0xf5, 0x1f], [0x47, 0x1f], [0xf7, 0x1d], [0xff, 0x1d], [0x21, 0x1f], [0xff, 0x1f], [0xf7, 0x1f]]
radix_point = 0x20
degree_centigrad = 0x05
Fahrenheit_degree = 0x06
BLE = 0x08
POW = 0x10
First_black = 0x1f
First_white = 0x00

print("epd1in9 Demo")
	
epd = EPD()
print("init and Clear")
	
epd.init()

epd.lut_5S()
print("1111")
epd.Write_Screen(DSPNUM_WW)

sleep(500)

epd.lut_GC()
epd.Write_Screen1(DSPNUM_WB)
sleep(500)
epd.Write_Screen(DSPNUM_WW)
sleep(500)

epd.lut_DU_WB()
sleep(500)
epd.Write_Screen(DSPNUM_W0)
sleep(500)
epd.Write_Screen(DSPNUM_W1)
sleep(500)
epd.Write_Screen(DSPNUM_W2)
sleep(500)
epd.Write_Screen(DSPNUM_W3)
sleep(500)
epd.Write_Screen(DSPNUM_W4)
sleep(500)
epd.Write_Screen(DSPNUM_W5)
sleep(500)
epd.Write_Screen(DSPNUM_W6)
sleep(500)
epd.Write_Screen(DSPNUM_W7)
sleep(500)
epd.Write_Screen(DSPNUM_W8)
sleep(500)
epd.Write_Screen(DSPNUM_W9)
sleep(500)
epd.Write_Screen(DSPNUM_WB)
sleep(500)

epd.sleep()

下記URL先のページでもMicroPythonのコードを確認できます。

https://github.com/inunosinsi/e-paper_on_microbit/blob/main/main.py