├── LICENSE
├── README.md
└── tm1637.py


/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2016 John La Rooy
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
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1 | # raspberrypi-tm1637
2 | Proof of concept TM1637 driver for raspberry pi for Python3
3 | 
4 | 
5 | 


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/tm1637.py:
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  1 | #!/usr/bin/env python3
  2 | 
  3 | import subprocess
  4 | from time import time, sleep, localtime
  5 | 
  6 | from wiringpi2 import wiringPiSetupGpio, pinMode, digitalRead, digitalWrite, GPIO
  7 | wiringPiSetupGpio()
  8 | 
  9 | CLK = 21
 10 | DIO = 20
 11 | 
 12 | """
 13 |       A
 14 |      ---
 15 |   F |   | B
 16 |      -G-
 17 |   E |   | C
 18 |      ---
 19 |       D
 20 | 
 21 | """
 22 | 
 23 | 
 24 | class TM1637:
 25 |     I2C_COMM1 = 0x40
 26 |     I2C_COMM2 = 0xC0
 27 |     I2C_COMM3 = 0x80
 28 |     digit_to_segment = [
 29 |         0b0111111, # 0
 30 |         0b0000110, # 1
 31 |         0b1011011, # 2
 32 |         0b1001111, # 3
 33 |         0b1100110, # 4
 34 |         0b1101101, # 5
 35 |         0b1111101, # 6
 36 |         0b0000111, # 7
 37 |         0b1111111, # 8
 38 |         0b1101111, # 9
 39 |         0b1110111, # A
 40 |         0b1111100, # b
 41 |         0b0111001, # C
 42 |         0b1011110, # d
 43 |         0b1111001, # E
 44 |         0b1110001  # F
 45 |         ]
 46 | 
 47 |     def __init__(self, clk, dio):
 48 |         self.clk = clk
 49 |         self.dio = dio
 50 |         self.brightness = 0x0f
 51 | 
 52 |         pinMode(self.clk, GPIO.INPUT)
 53 |         pinMode(self.dio, GPIO.INPUT)
 54 |         digitalWrite(self.clk, GPIO.LOW)
 55 |         digitalWrite(self.dio, GPIO.LOW)
 56 | 
 57 |     def bit_delay(self):
 58 |         sleep(0.001)
 59 |         return
 60 |    
 61 |     def set_segments(self, segments, pos=0):
 62 |         # Write COMM1
 63 |         self.start()
 64 |         self.write_byte(self.I2C_COMM1)
 65 |         self.stop()
 66 | 
 67 |         # Write COMM2 + first digit address
 68 |         self.start()
 69 |         self.write_byte(self.I2C_COMM2 + pos)
 70 | 
 71 |         for seg in segments:
 72 |             self.write_byte(seg)
 73 |         self.stop()
 74 | 
 75 |         # Write COMM3 + brightness
 76 |         self.start()
 77 |         self.write_byte(self.I2C_COMM3 + self.brightness)
 78 |         self.stop()
 79 | 
 80 |     def start(self):
 81 |         pinMode(self.dio, GPIO.OUTPUT)
 82 |         self.bit_delay()
 83 |    
 84 |     def stop(self):
 85 |         pinMode(self.dio, GPIO.OUTPUT)
 86 |         self.bit_delay()
 87 |         pinMode(self.clk, GPIO.INPUT)
 88 |         self.bit_delay()
 89 |         pinMode(self.dio, GPIO.INPUT)
 90 |         self.bit_delay()
 91 |   
 92 |     def write_byte(self, b):
 93 |       # 8 Data Bits
 94 |         for i in range(8):
 95 | 
 96 |             # CLK low
 97 |             pinMode(self.clk, GPIO.OUTPUT)
 98 |             self.bit_delay()
 99 | 
100 |             pinMode(self.dio, GPIO.INPUT if b & 1 else GPIO.OUTPUT)
101 | 
102 |             self.bit_delay()
103 | 
104 |             pinMode(self.clk, GPIO.INPUT)
105 |             self.bit_delay()
106 |             b >>= 1
107 |       
108 |         pinMode(self.clk, GPIO.OUTPUT)
109 |         self.bit_delay()
110 |         pinMode(self.clk, GPIO.INPUT)
111 |         self.bit_delay()
112 |         pinMode(self.clk, GPIO.OUTPUT)
113 |         self.bit_delay()
114 | 
115 |         return
116 | 
117 | 
118 | def show_ip_address(tm):
119 |     ipaddr = subprocess.check_output("hostname -I", shell=True, timeout=1).strip().split(b".")
120 |     for octet in ipaddr:
121 |         tm.set_segments([0, 0, 0, 0])
122 |         sleep(0.1)
123 |         tm.set_segments([tm.digit_to_segment[int(x) & 0xf] for x in octet])
124 |         sleep(0.9)
125 | 
126 | 
127 | def show_clock(tm):
128 |         t = localtime()
129 |         sleep(1 - time() % 1)
130 |         d0 = tm.digit_to_segment[t.tm_hour // 10] if t.tm_hour // 10 else 0
131 |         d1 = tm.digit_to_segment[t.tm_hour % 10]
132 |         d2 = tm.digit_to_segment[t.tm_min // 10]
133 |         d3 = tm.digit_to_segment[t.tm_min % 10]
134 |         tm.set_segments([d0, 0x80 + d1, d2, d3])
135 |         sleep(.5)
136 |         tm.set_segments([d0, d1, d2, d3])
137 | 
138 | 
139 | if __name__ == "__main__":
140 |     tm = TM1637(CLK, DIO)
141 | 
142 |     show_ip_address(tm)
143 | 
144 |     while True:
145 |         show_clock(tm)
146 | 
147 | 
148 | 
149 | 


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