Skip to main content

GPIOD port from Raspberry Pi Python port from MicroPython library for TM1637 LED driver.

Project description

TM1637

GPIOD Python 3 TM1637

A Python 3 port from MicroPython library for the quad 7-segment LED display modules based on the TM1637 LED driver, implemented using Linux GPIOD.

Installation

This project is available through pip. Make sure that you are using Python 3.

$ pip3 install gpiod-tm1637

Examples

Basic usage

import tm1637
tm = tm1637.TM1637("/dev/gpiochip0", clk=3, dio=2)

# 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)

For more detailed examples, see demo.py

Seven Segment Font

They are called 7-segment displays as there are 7 LEDs for each digit (segment). One byte (7 lower bits) for each segment. The 8th bit (MSB) is for the colon and only on the 2nd segment.

      A
     ---
  F |   | B   *
     -G-      H (on 2nd segment)
  E |   | C   *
     ---
      D

  HGFEDCBA
0b01101101 = 0x6D = 109 = show "5"
Display Bin Hex Dec
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

Methods

Get or set brightness.

brightness(val=None)

Write one or more segments at a given offset.

write(segments, pos=0)

Convert a single hex digit (0x00-0x0f) to a segment.

encode_digit(digit)

Convert a string to a list of segments.

encode_string(string)

Convert a single character to a segment.

encode_char(char)

Display a number in hexadecimal format 0000 through FFFF.

hex(val)

Display a number -999 through 9999, right aligned.

number(num)

Display 2 independent numbers on either side of the (optional) colon, with leading zeros.

numbers(num1, num2, colon=True)

Display a temperature -9 through 99 followed by degrees C.

temperature(num)

Show a string on the display. Shorthand for write(encode_string()). Limited to first 4 characters.

show(string, colon=False)

Display a string on the display, scrolling from the right to left, speed adjustable. String starts off-screen and scrolls until off-screen at 4 FPS by default.

scroll(string, delay=250)

Parts

Connections

Raspberry Pi 4 Digit Display
GPIO3 CLK
GPIO2 DIO
3V3 (or 5V) VCC
GND GND

Links

License

Licensed under the MIT License.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

gpiod-tm1637-1.3.7.tar.gz (7.1 kB view details)

Uploaded Source

Built Distribution

gpiod_tm1637-1.3.7-py3-none-any.whl (7.3 kB view details)

Uploaded Python 3

File details

Details for the file gpiod-tm1637-1.3.7.tar.gz.

File metadata

  • Download URL: gpiod-tm1637-1.3.7.tar.gz
  • Upload date:
  • Size: 7.1 kB
  • Tags: Source
  • Uploaded using Trusted Publishing? No
  • Uploaded via: twine/4.0.2 CPython/3.11.7

File hashes

Hashes for gpiod-tm1637-1.3.7.tar.gz
Algorithm Hash digest
SHA256 15d233de7e51cd8fb0f9d6baff7b8ad6a4e84a91ebefc2f70dee80ce04569e51
MD5 1c66e1781028c05225861bc909554671
BLAKE2b-256 73ca49c9a384781f4006bb565b24b0dc0bfe06b7d560efdef1e829f9935124d7

See more details on using hashes here.

File details

Details for the file gpiod_tm1637-1.3.7-py3-none-any.whl.

File metadata

File hashes

Hashes for gpiod_tm1637-1.3.7-py3-none-any.whl
Algorithm Hash digest
SHA256 e62eaeefd01bc4847220e800b1e50fa598a341bc37608b90c506f801b9c0290d
MD5 de3f7c535a48ead6f357a4fd41690cb7
BLAKE2b-256 187b0c5370e097ead3cd9304ca9af3a494ffb1c6387d487a6946d82c5b20b264

See more details on using hashes here.

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page