!! ssd1306

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VCCとGNDの違いがあるので注意

!Arduinoで
https://qiita.com/jakalada/items/8f83d07291d984a31633

! micropython で
https://qiita.com/inachi/items/ceb3e8e12022a7cbdf7b

 git 

https://github.com/micropython/micropython/blob/master/drivers/display/ssd1306.py

https://github.com/micropython/micropython/tree/master/drivers/display


!配線
,SSD1306	,ESP32,STM32F103
,GND ,GND , GND
,VCC	,3v3, 3v3
,SCL	,IO4, SCL1(PB6)
,SDA	,IO5, SDA1(PB7)

!! 接続の確認
 from machine import I2C, Pin, SoftI2C
 # i2c=I2C(scl=Pin(5),sda=Pin(4),freq=100000)
 i2c=SoftI2C(scl=Pin(5),sda=Pin(4),freq=100000)
 print(i2c.scan())
 print("END")

!! micropython サンプル
! 文字を表示
 # SSD1306
 from machine import Pin, I2C
 from ssd1306 import SSD1306_I2C
 
 i2c = I2C(scl=Pin(4), sda=Pin(5))
 ## i2c = I2C(scl=Pin(34), sda=Pin(33))
 
 oled = SSD1306_I2C(128, 64, i2c)
 
 oled.text('Hello, World 1!', 0, 0)
 oled.text('Hello, World 2!', 0, 10)
 oled.text('Hello, World 3!', 0, 20)
 
 oled.text('Hello, World 4!', 0, 30)
 oled.text('Hello, World 5!', 0, 40)
 oled.text('Hello, World 6!', 0, 50)
 
 oled.show()

! 図形を描く

 # SSD1306
 from machine import Pin, I2C
 from ssd1306 import SSD1306_I2C
 i2c = I2C(scl=Pin(4), sda=Pin(5))
 ## i2c = I2C(scl=Pin(34), sda=Pin(33))
 oled = SSD1306_I2C(128, 64, i2c)
 
 oled.fill(0)
 oled.hline(0,32,128,1)
 oled.vline(64,0,64,1)
 oled.show()
 
 oled.line(0,0,127,63,1)
 oled.rect(72,8,24,16,1)
 oled.fill_rect(24,48,24,16,1)
 oled.show()

! 大きなフォント
https://github.com/peterhinch/micropython-font-to-py/tree/master/writer

https://github.com/peterhinch/micropython-nano-gui
 arial10.py
 courier20.py
 を使う

! 時刻を OLED に
QIITA のコードを参考（丸写し？）して大きなフォントで時刻表示
https://qiita.com/tshimizu8/items/a7c189612a9ba0a5284b
 # ORIGNAL CODE https://qiita.com/tshimizu8/items/a7c189612a9ba0a5284b
 # Watch with NTP synchronization
 # MicroPython on Lolin ESP32 OLED 128x64 16x6(0..50)
 
 ssid = "yourAPid"; password =  "APpassword"
 ntp_host = "jp.pool.ntp.org"
 # (datetime.date(2000, 1, 1) - datetime.date(1900, 1, 1)).days * 24 * 60 * 60
 NTP_DELTA = 3155673600
 
 import machine, time, ssd1306
 import network, socket, struct
 import gc
 
 i2c = machine.I2C(scl=machine.Pin(4), sda=machine.Pin(5))
 oled = ssd1306.SSD1306_I2C(128, 64, i2c)
 
 oled.fill(0)
 #         '1234567890123456'
 oled.text('Python NtpClient', 0, 0)
 # oled.text('SSD1306 128x64  ', 0, 10)
 
 station = network.WLAN(network.STA_IF)
 station.active(True)
 station.connect(ssid, password)
 
 while station.isconnected() == False: pass
 
 oled.text(station.ifconfig()[0], 0, 15,1)
 oled.show()
 
 import arial10   # font
 import courier20 # FONT
 from writer import Writer
 wri10 = Writer(oled, arial10, verbose=False)
 wri20 = Writer(oled, courier20, verbose=False)
 
 # NTPの時刻取得ルーチン
 NTP_QUERY = bytearray(48)
 NTP_QUERY[0] = 0x1b
 # アドレス取得
 addr = socket.getaddrinfo(ntp_host, 123)[0][-1]
 # NTPポートを開く
 s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 res = s.sendto(NTP_QUERY, addr)
 msg = s.recv(48)
 s.close()
 
 val = struct.unpack("!I", msg[40:44])[0]
 # 時刻 val に９時間分付加してJSTにする
 ntpSec = val - NTP_DELTA  + (9*60*60)
 deltaSec = ntpSec - time.time() 
 
 def f2(i): return '{:0>2}'.format(i)    
 
 nowString = dayString = ""
 
 while True:
        nowSec = time.time() + deltaSec
        now = time.localtime(nowSec)
 
        # oled.text(nowString,0,35,0)  # Clear 
        nowString = '%s:%s:%s' % (f2(now[3]),f2(now[4]),f2(now[5]))
        #print(nowString)
        #oled.text(nowString,0,35)
        Writer.set_textpos(oled, 30, 8 )
        wri20.printstring(nowString)
 
        # oled.text(dayString,0,50,0)
        dayString = '%s/%s/%s' % (str(now[0]),f2(now[1]),f2(now[2]))
        # oled.text(dayString,0,50)
        Writer.set_textpos(oled, 50, 8 )
        wri10.printstring(dayString)
 
        oled.show()
        time.sleep(1)
        
----
! STM32F103