【ラズパイ】SSD1306で大きく数字を表示する【Python】【入門】
みなさんこんにちは。
SSD1306って使いやすいですけど標準の関数のみで数字を表示したら小さくて遠くから見ずらいですよね？
今回はmicropythonで画面いっぱいに数字を表示できるようにしてみようと思います！
使用例
下記の動画で使用しています！
このように画面全体に表示します。
youtu.be
数字を表示してみる
コード
def WriteDigitalNumber(i,wh,oled): #width space wi_s = 5 #height space hi_s = 8 #width wi = 19 #height hi = 48 w = 0 if wh == 1: w = 5 elif wh == 2: w = 34 elif wh == 3: w = 61 elif wh == 4: w = 75 elif wh == 5: w = 104 else : print('number is out of index') if i == 0: oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 1: oled.vline(w+wi,hi_s,hi,1) elif i == 2: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,int(hi/2),1) oled.hline(w,hi_s+int((hi/2)),wi,1) oled.vline(w,hi_s+int((hi/2)),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 3: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 4: oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) elif i == 5: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s+int(hi/2),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 6: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s+int(hi/2),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 7: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) elif i == 8: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 9: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1)
解説
oledにある描画関数の
vline(縦線)とhline(横線)を使用しています。
使い方
下のようにした場合0が1番目の位置に表示されます
#０を一番目に表示 WriteDigitalNumber(0,1,oled) # 引数1:表示する数字、引数2:表示する位置(１から５まで)、引数3:oled
下の画像のように、真ん中のスペースが足りていないので３番目の位置は各々小数点とか描画したらいいと思います。
#０を一番目に表示 WriteDigitalNumber(0,1,oled) #０を2番目に表示 WriteDigitalNumber(0,2,oled) #3を4番目に表示 WriteDigitalNumber(3,4,oled) #9を5番目に表示 WriteDigitalNumber(9,5,oled)
サンプル
ラズパイピコにて超音波センサーの測定結果を表示するために使用しました。
import machine import utime import ssd1306 # 超音波センサー trigger = machine.Pin(14, machine.Pin.OUT) echo = machine.Pin(15, machine.Pin.IN) # ssd1306 sda = machine.Pin(6) scl = machine.Pin(7) i2c = machine.I2C(1,sda=sda, scl=scl, freq=400000) oled_width = 128 oled_height = 64 oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c) def read_distance(): trigger.low() utime.sleep_us(2) trigger.high() utime.sleep(0.00001) trigger.low() while echo.value() == 0: signaloff = utime.ticks_us() while echo.value() == 1: signalon = utime.ticks_us() timepassed = signalon - signaloff distance = (timepassed * 0.0343) / 2 return distance def WriteDigitalNumber(i,wh): #width space wi_s = 5 #height space hi_s = 8 #width wi = 19 #height hi = 48 w = 0 if wh == 1: w = 5 elif wh == 2: w = 34 elif wh == 3: w = 61 elif wh == 4: w = 75 elif wh == 5: w = 104 else : print('number is out of index') if i == 0: oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 1: oled.vline(w+wi,hi_s,hi,1) elif i == 2: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,int(hi/2),1) oled.hline(w,hi_s+int((hi/2)),wi,1) oled.vline(w,hi_s+int((hi/2)),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 3: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 4: oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) elif i == 5: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s+int(hi/2),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 6: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s+int(hi/2),int(hi/2),1) oled.hline(w,hi_s+hi,wi,1) elif i == 7: oled.hline(w,hi_s,wi,1) oled.vline(w+wi,hi_s,hi,1) elif i == 8: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,hi,1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 9: oled.hline(w,hi_s,wi,1) oled.vline(w,hi_s,int(hi/2),1) oled.hline(w,hi_s+int(hi/2),wi,1) oled.vline(w+wi,hi_s,hi,1) oled.hline(w,hi_s+hi,wi,1) elif i == 10 and wh == 3: oled.vline(w+3,hi_s+3,42,1) oled.vline(w+3,hi_s+18,14,0) def WriteDigitalDot(position): wh = position #print(wh) #width space wi_s = 5 #height space hi_s = 8 #width wi = 19 #height hi = 48 w = 0 if wh == 1: w = 5 elif wh == 2: w = 34 elif wh == 3: w = 61 elif wh == 4: w = 75 elif wh == 5: w = 104 else : print('number is out of index') #oled.hline(w,hi_s+hi,wi,1) oled.fill_rect(w,hi,5,5,1) if __name__ == "__main__": while True: oled.fill(0) oled.rect(0,0,128,64,1) d = read_distance() d = round(d, 2) if d < 100: n=0 if d < 10: n=1 WriteDigitalNumber(0,1) for i in str(d): n+=1 if i == ".": WriteDigitalDot(3) continue WriteDigitalNumber(int(i),n) print(d) oled.show() utime.sleep(0.3)
