質問編集履歴
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プログラムの内容を<code>を使っていれるようにしました。
test
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DS18B20a.pyがLCDに表示できません
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2019.9.23
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yama286です
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以上はRaspberry Pi Beginner Kitで購入したものです
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1. 不具合内容
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**1. 不具合内容**
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後述のサンプルプログラムDS18B20a.pyをターミナルで動作させると、ターミナルには測定結果が出ますが、標準開発環境Thonny Python IDEではエラーになります。
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2. DS18B20単独動作確認
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**2. DS18B20単独動作確認**
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連続温度測定は下記リスト(webより入手)で確認済みです。
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```ここに言語を入力
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#/usr/bin/ruby
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@@ -92,231 +100,243 @@
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main()
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```**実行結果**
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時刻と温度がパソコン画面に表示されます。この結果は正常です。
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**3.LCD:12 LCD Display単独動作確認**
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動作は下記リスト(webより入手)で確認済みです。
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```ここに言語を入力
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import smbus
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import time
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# Define some device parameters
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I2C_ADDR = 0x27 # I2C device address, if any error, change this address to 0x27
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LCD_WIDTH = 16 # Maximum characters per line
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# Define some device constants
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LCD_CHR = 1 # Mode - Sending data
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LCD_CMD = 0 # Mode - Sending command
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LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
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LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line
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LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line
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LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line
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LCD_BACKLIGHT = 0x08 # On
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#LCD_BACKLIGHT = 0x00 # Off
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ENABLE = 0b00000100 # Enable bit
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# Timing constants
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E_PULSE = 0.0005
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E_DELAY = 0.0005
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#Open I2C interface
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#bus = smbus.SMBus(0) # Rev 1 Pi uses 0
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bus = smbus.SMBus(1) # Rev 2 Pi uses 1
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def lcd_init():
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# Initialise display
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lcd_byte(0x33,LCD_CMD) # 110011 Initialise
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lcd_byte(0x32,LCD_CMD) # 110010 Initialise
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lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction
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lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off
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lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size
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lcd_byte(0x01,LCD_CMD) # 000001 Clear display
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time.sleep(E_DELAY)
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def lcd_byte(bits, mode):
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# Send byte to data pins
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# bits = the data
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# mode = 1 for data
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# 0 for command
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bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
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bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT
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# High bits
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bus.write_byte(I2C_ADDR, bits_high)
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lcd_toggle_enable(bits_high)
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# Low bits
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bus.write_byte(I2C_ADDR, bits_low)
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lcd_toggle_enable(bits_low)
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def lcd_toggle_enable(bits):
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# Toggle enable
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time.sleep(E_DELAY)
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bus.write_byte(I2C_ADDR, (bits | ENABLE))
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time.sleep(E_PULSE)
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bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
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time.sleep(E_DELAY)
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def lcd_string(message,line):
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# Send string to display
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message = message.ljust(LCD_WIDTH," ")
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lcd_byte(line, LCD_CMD)
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for i in range(LCD_WIDTH):
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lcd_byte(ord(message[i]),LCD_CHR)
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def main():
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# Main program block
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# Initialise display
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lcd_init()
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while True:
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# Send some test
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lcd_string("Created by <",LCD_LINE_1)
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lcd_string("Osoyoo.com <",LCD_LINE_2)
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time.sleep(3) # Send some more text
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lcd_string("> Tutorial Url:",LCD_LINE_1)
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lcd_string("> http://osoyoo.com",LCD_LINE_2)
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time.sleep(3)
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if __name__ == '__main__':
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try:
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main()
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except KeyboardInterrupt:
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pass
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finally:
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lcd_byte(0x01, LCD_CMD)
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```
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**実行結果**
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時刻と温度がパソコン画面に表示されます。
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3.LCD:12 LCD Display単独動作確認
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動作は下記リスト(webより入手)で確認済みです。
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********************************************************************************
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import smbus
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import time
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# Define some device parameters
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I2C_ADDR = 0x27 # I2C device address, if any error, change this address to 0x27
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120
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LCD_WIDTH = 16 # Maximum characters per line
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# Define some device constants
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LCD_CHR = 1 # Mode - Sending data
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LCD_CMD = 0 # Mode - Sending command
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LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
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LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line
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LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line
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LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line
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LCD_BACKLIGHT = 0x08 # On
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#LCD_BACKLIGHT = 0x00 # Off
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ENABLE = 0b00000100 # Enable bit
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# Timing constants
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E_PULSE = 0.0005
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E_DELAY = 0.0005
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#Open I2C interface
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#bus = smbus.SMBus(0) # Rev 1 Pi uses 0
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bus = smbus.SMBus(1) # Rev 2 Pi uses 1
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def lcd_init():
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# Initialise display
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lcd_byte(0x33,LCD_CMD) # 110011 Initialise
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lcd_byte(0x32,LCD_CMD) # 110010 Initialise
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lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction
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lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off
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lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size
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lcd_byte(0x01,LCD_CMD) # 000001 Clear display
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time.sleep(E_DELAY)
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def lcd_byte(bits, mode):
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# Send byte to data pins
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# bits = the data
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# mode = 1 for data
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# 0 for command
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bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
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bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT
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# High bits
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bus.write_byte(I2C_ADDR, bits_high)
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lcd_toggle_enable(bits_high)
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# Low bits
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bus.write_byte(I2C_ADDR, bits_low)
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lcd_toggle_enable(bits_low)
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def lcd_toggle_enable(bits):
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# Toggle enable
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time.sleep(E_DELAY)
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bus.write_byte(I2C_ADDR, (bits | ENABLE))
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229
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time.sleep(E_PULSE)
|
|
230
|
-
|
|
231
|
-
bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
|
|
232
|
-
|
|
233
|
-
time.sleep(E_DELAY)
|
|
234
|
-
|
|
235
|
-
|
|
236
|
-
|
|
237
|
-
def lcd_string(message,line):
|
|
238
|
-
|
|
239
|
-
# Send string to display
|
|
240
|
-
|
|
241
|
-
|
|
242
|
-
|
|
243
|
-
message = message.ljust(LCD_WIDTH," ")
|
|
244
|
-
|
|
245
|
-
|
|
246
|
-
|
|
247
|
-
lcd_byte(line, LCD_CMD)
|
|
248
|
-
|
|
249
|
-
|
|
250
|
-
|
|
251
|
-
for i in range(LCD_WIDTH):
|
|
252
|
-
|
|
253
|
-
lcd_byte(ord(message[i]),LCD_CHR)
|
|
254
|
-
|
|
255
|
-
|
|
256
|
-
|
|
257
|
-
def main():
|
|
258
|
-
|
|
259
|
-
# Main program block
|
|
260
|
-
|
|
261
|
-
|
|
262
|
-
|
|
263
|
-
# Initialise display
|
|
264
|
-
|
|
265
|
-
lcd_init()
|
|
266
|
-
|
|
267
|
-
|
|
268
|
-
|
|
269
|
-
while True:
|
|
270
|
-
|
|
271
|
-
|
|
272
|
-
|
|
273
|
-
# Send some test
|
|
274
|
-
|
|
275
|
-
lcd_string("Created by <",LCD_LINE_1)
|
|
276
|
-
|
|
277
|
-
lcd_string("Osoyoo.com <",LCD_LINE_2)
|
|
278
|
-
|
|
279
|
-
time.sleep(3) # Send some more text
|
|
280
|
-
|
|
281
|
-
|
|
282
|
-
|
|
283
|
-
lcd_string("> Tutorial Url:",LCD_LINE_1)
|
|
284
|
-
|
|
285
|
-
lcd_string("> http://osoyoo.com",LCD_LINE_2)
|
|
286
|
-
|
|
287
|
-
|
|
288
|
-
|
|
289
|
-
time.sleep(3)
|
|
290
|
-
|
|
291
|
-
|
|
292
|
-
|
|
293
|
-
if __name__ == '__main__':
|
|
294
|
-
|
|
295
|
-
|
|
296
|
-
|
|
297
|
-
try:
|
|
298
|
-
|
|
299
|
-
main()
|
|
300
|
-
|
|
301
|
-
except KeyboardInterrupt:
|
|
302
|
-
|
|
303
|
-
pass
|
|
304
|
-
|
|
305
|
-
finally:
|
|
306
|
-
|
|
307
|
-
lcd_byte(0x01, LCD_CMD)
|
|
308
|
-
|
|
309
|
-
**実行結果**
|
|
310
|
-
|
|
311
|
-
LCDに“Created by <” と "> Tutorial Url:"
|
|
329
|
+
LCDに“Created by <” と "> Tutorial Url:"
|
|
312
|
-
|
|
330
|
+
|
|
313
|
-
"Osoyoo.com <" "> http://osoyoo.com"
|
|
331
|
+
"Osoyoo.com <" "> http://osoyoo.com"
|
|
314
332
|
|
|
315
333
|
が交互に表示されます。
|
|
316
334
|
|
|
317
|
-
|
|
335
|
+
これも正常表示です。
|
|
318
|
-
|
|
336
|
+
|
|
337
|
+
|
|
338
|
+
|
|
319
|
-
4. DS18B20の測定データをLCD:12 LCD Displayに表示させたい
|
|
339
|
+
**4. DS18B20の測定データをLCD:12 LCD Displayに表示させたい**
|
|
320
340
|
|
|
321
341
|
1)参考資料 https://www.denshi.club/pc/raspi/5raspberry-pi-zeroiot161.html
|
|
322
342
|
|
|
@@ -334,7 +354,7 @@
|
|
|
334
354
|
|
|
335
355
|
正しく認識されています。(DS18B20は1-wireのためアドレスは出ません)
|
|
336
356
|
|
|
337
|
-
3)プログラム作成 1
|
|
357
|
+
3)プログラム作成 1)参考資料urlのプログラム参照ください
|
|
338
358
|
|
|
339
359
|
この資料の“プログラム”にある47ステップをコーディングしました。
|
|
340
360
|
|