７セグ４桁LEDモジュールTM1637をmicropythonで使うために、
調べ直しました。
■過去の使用例記事
python版、ラズパイ使用
■出典
MicroPython TM1637 quad 7-segment LED display driver
■配線
I2Cのように見えるが実際は違う。
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基板 RPP
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CLK GP27(ANY)
DIO GP28(ANY)
VCC 3V3(VUSB-available)
GND GND
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■micropythonでの使い方例
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# test_tm1637_py
# --- please upload driver tm1637,py on root of RPP
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import tm1637
from machine import Pin
tm = tm1637.TM1637(clk=Pin(5), dio=Pin(4))
# all LEDS on "88:88"
tm.write([127, 255, 127, 127])
# all LEDS off
tm.write([0, 0, 0, 0])
# show "0123"
tm.write([63, 6, 91, 79])
# show "COOL"
tm.write([0b00111001, 0b00111111, 0b00111111, 0b00111000])
# show "HELP"
tm.show('help')
# display "dEAd", "bEEF"
tm.hex(0xdead)
tm.hex(0xbeef)
# show "12:59"
tm.numbers(12, 59)
# show "-123"
tm.number(-123)
# show temperature '24*C'
tm.temperature(24)
■セグメントコード
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A
---
F | | B *
-G- H (on 2nd segment)
E | | C *
---
D
データ順列 HGFEDCBA
例：0b01101101 = 0x6D = 109 = show "5"
Display Bin Hex Dec
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0 0b00111111 0x3F 63
1 0b00000110 0x06 6
2 0b01011011 0x5B 91
3 0b01001111 0x4F 79
4 0b01100110 0x66 102
5 0b01101101 0x6D 109
6 0b01111101 0x7D 125
7 0b00000111 0x07 7
8 0b01111111 0x7F 127
9 0b01101111 0x6F 111
A 0b01110111 0x77 119
b 0b01111100 0x7C 124
C 0b00111001 0x39 57
d 0b01011110 0x5E 94
E 0b01111001 0x79 121
F 0b01110001 0x71 113
G 0b00111101 0x3D 61
H 0b01110110 0x76 118
I 0b00000110 0x06 6
J 0b00011110 0x1E 30
K 0b01110110 0x76 118
L 0b00111000 0x38 56
M 0b01010101 0x55 85
n 0b01010100 0x54 84
O 0b00111111 0x3F 63
P 0b01110011 0x73 115
q 0b01100111 0x67 103
r 0b01010000 0x50 80
S 0b01101101 0x6D 109
t 0b01111000 0x78 120
U 0b00111110 0x3E 62
v 0b00011100 0x1C 28
W 0b00101010 0x2A 42
X 0b01110110 0x76 118
y 0b01101110 0x6E 110
Z 0b01011011 0x5B 91
blank 0b00000000 0x00 0
- 0b01000000 0x40 64
* 0b01100011 0x63 99
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■ドライバーコード（出典からコピペ）
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# tm1637.py
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"""
MicroPython TM1637 quad 7-segment LED display driver
https://github.com/mcauser/micropython-tm1637
MIT License
Copyright (c) 2016-2023 Mike Causer
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""
__version__ = '1.3.0'
from micropython import const
from machine import Pin
from time import sleep_us, sleep_ms
TM1637_CMD1 = const(64) # 0x40 data command
TM1637_CMD2 = const(192) # 0xC0 address command
TM1637_CMD3 = const(128) # 0x80 display control command
TM1637_DSP_ON = const(8) # 0x08 display on
TM1637_DELAY = const(10) # 10us delay between clk/dio pulses
TM1637_MSB = const(128) # msb is the decimal point or the colon depending on your display
# 0-9, a-z, blank, dash, star
_SEGMENTS = bytearray(b'\x3F\x06\x5B\x4F\x66\x6D\x7D\x07\x7F\x6F\x77\x7C\x39\x5E\x79\x71\x3D\x76\x06\x1E\x76\x38\x55\x54\x3F\x73\x67\x50\x6D\x78\x3E\x1C\x2A\x76\x6E\x5B\x00\x40\x63')
class TM1637(object):
"""Library for quad 7-segment LED modules based on the TM1637 LED driver."""
def __init__(self, clk, dio, brightness=7):
self.clk = clk
self.dio = dio
if not 0 <= brightness <= 7:
raise ValueError("Brightness out of range")
self._brightness = brightness
self.clk.init(Pin.OUT, value=0)
self.dio.init(Pin.OUT, value=0)
sleep_us(TM1637_DELAY)
self._write_data_cmd()
self._write_dsp_ctrl()
def _start(self):
self.dio(0)
sleep_us(TM1637_DELAY)
self.clk(0)
sleep_us(TM1637_DELAY)
def _stop(self):
self.dio(0)
sleep_us(TM1637_DELAY)
self.clk(1)
sleep_us(TM1637_DELAY)
self.dio(1)
def _write_data_cmd(self):
# automatic address increment, normal mode
self._start()
self._write_byte(TM1637_CMD1)
self._stop()
def _write_dsp_ctrl(self):
# display on, set brightness
self._start()
self._write_byte(TM1637_CMD3 | TM1637_DSP_ON | self._brightness)
self._stop()
def _write_byte(self, b):
for i in range(8):
self.dio((b >> i) & 1)
sleep_us(TM1637_DELAY)
self.clk(1)
sleep_us(TM1637_DELAY)
self.clk(0)
sleep_us(TM1637_DELAY)
self.clk(0)
sleep_us(TM1637_DELAY)
self.clk(1)
sleep_us(TM1637_DELAY)
self.clk(0)
sleep_us(TM1637_DELAY)
def brightness(self, val=None):
"""Set the display brightness 0-7."""
# brightness 0 = 1/16th pulse width
# brightness 7 = 14/16th pulse width
if val is None:
return self._brightness
if not 0 <= val <= 7:
raise ValueError("Brightness out of range")
self._brightness = val
self._write_data_cmd()
self._write_dsp_ctrl()
def write(self, segments, pos=0):
"""Display up to 6 segments moving right from a given position.
The MSB in the 2nd segment controls the colon between the 2nd
and 3rd segments."""
if not 0 <= pos <= 5:
raise ValueError("Position out of range")
self._write_data_cmd()
self._start()
self._write_byte(TM1637_CMD2 | pos)
for seg in segments:
self._write_byte(seg)
self._stop()
self._write_dsp_ctrl()
def encode_digit(self, digit):
"""Convert a character 0-9, a-f to a segment."""
return _SEGMENTS[digit & 0x0f]
def encode_string(self, string):
"""Convert an up to 4 character length string containing 0-9, a-z,
space, dash, star to an array of segments, matching the length of the
source string."""
segments = bytearray(len(string))
for i in range(len(string)):
segments[i] = self.encode_char(string[i])
return segments
def encode_char(self, char):
"""Convert a character 0-9, a-z, space, dash or star to a segment."""
o = ord(char)
if o == 32:
return _SEGMENTS[36] # space
if o == 42:
return _SEGMENTS[38] # star/degrees
if o == 45:
return _SEGMENTS[37] # dash
if o >= 65 and o <= 90:
return _SEGMENTS[o-55] # uppercase A-Z
if o >= 97 and o <= 122:
return _SEGMENTS[o-87] # lowercase a-z
if o >= 48 and o <= 57:
return _SEGMENTS[o-48] # 0-9
raise ValueError("Character out of range: {:d} '{:s}'".format(o, chr(o)))
def hex(self, val):
"""Display a hex value 0x0000 through 0xffff, right aligned."""
string = '{:04x}'.format(val & 0xffff)
self.write(self.encode_string(string))
def number(self, num):
"""Display a numeric value -999 through 9999, right aligned."""
# limit to range -999 to 9999
num = max(-999, min(num, 9999))
string = '{0: >4d}'.format(num)
self.write(self.encode_string(string))
def numbers(self, num1, num2, colon=True):
"""Display two numeric values -9 through 99, with leading zeros
and separated by a colon."""
num1 = max(-9, min(num1, 99))
num2 = max(-9, min(num2, 99))
segments = self.encode_string('{0:0>2d}{1:0>2d}'.format(num1, num2))
if colon:
segments[1] |= 0x80 # colon on
self.write(segments)
def temperature(self, num):
if num < -9:
self.show('lo') # low
elif num > 99:
self.show('hi') # high
else:
string = '{0: >2d}'.format(num)
self.write(self.encode_string(string))
self.write([_SEGMENTS[38], _SEGMENTS[12]], 2) # degrees C
def show(self, string, colon=False):
segments = self.encode_string(string)
if len(segments) > 1 and colon:
segments[1] |= 128
self.write(segments[:4])
def scroll(self, string, delay=250):
segments = string if isinstance(string, list) else self.encode_string(string)
data = [0] * 8
data[4:0] = list(segments)
for i in range(len(segments) + 5):
self.write(data[0+i:4+i])
sleep_ms(delay)
class TM1637Decimal(TM1637):
"""Library for quad 7-segment LED modules based on the TM1637 LED driver.
This class is meant to be used with decimal display modules (modules
that have a decimal point after each 7-segment LED).
"""
def encode_string(self, string):
"""Convert a string to LED segments.
Convert an up to 4 character length string containing 0-9, a-z,
space, dash, star and '.' to an array of segments, matching the length of
the source string."""
segments = bytearray(len(string.replace('.','')))
j = 0
for i in range(len(string)):
if string[i] == '.' and j > 0:
segments[j-1] |= TM1637_MSB
continue
segments[j] = self.encode_char(string[i])
j += 1
return segments