User Guide For Tm1637 4 Digits Display Yr8LQNg7d V

user_guide_for_tm1637_4_digits_display_Yr8LQNg7dV

User Manual:

Open the PDF directly: View PDF PDF.
Page Count: 4

User guide for TM1637 4 digits display
Connection to an Arduino is like so:
VCC to Arduino 5v
GND to Arduino GND
CLK to Arduino digital pin, your choice
DIO to Arduino digital pin, your choice
This document is based on the library available at http://playground.arduino.cc/Main/TM1637.
The library defines a class object TM1637Display with public methods for controlling the device
through two digital IO pins.
First you have to create a new object of type TM1637Display like so:
#include <TM1637Display.h>
#define CLK 9 //can be any digital pin
#define DIO 8 //can be any digital pin
TM1637Display display(CLK, DIO);
Available functions
display.setBrightness
You can set the brightness with the following command setting the parameter from 0 for lowest
brightness to 7 for the highest.
setBrightness(7);
display.showNumberDec
Next function that is simple to use is showNumberDec. The parameters are:
Number of type integer. Values up to 9999.
True/false. Display leading zeroes for values up to 999. Default value is false;
Correspond to the number of digits to be displayed.
Position of the least significant digit (0 – leftmost, 3 – rightmost).
Examples:
display.showNumberDec(1,false) 0001
display.showNumberDec(1,false,1,0) 1000
display.showNumberDec(1,false,1,2) 0010
display.showNumberDec(10,false,2,0) 1000
You can write a for example a for loop to display numbers from 1 to 9999.
void loop() {
display.showNumberDec(i++)
if (I > 9999)
i=0;
}
To turn on the center colon 00:00, execute the following code.
uint8_t segto;
int value = 1244;
segto = 0x80 | display.encodeDigit((value / 100)%10);
display.setSegments(&segto, 1, 1);
display.setSegments
Each of the four digits has 7 segments that can be addressed each individually. Each segment is
represented by a letter as shown below which is addressed by one bit.
// A
// ---
// F | | B
// -G-
// E | | C
// ---
// D
The table below shows mapping between from numbers to segments.
XGFEDCBA
0b00111111, 0
0b00000110, 1
0b01011011, 2
0b01001111, 3
0b01100110, 4
0b01101101, 5
0b01111101, 6
0b00000111, 7
0b01111111, 8
0b01101111, 9
0b01110111, A
0b01111100, B
0b00111001, C
0b01000111, D
0b01111001, E
0b01110001 F
To turn off all segments, use this command.
Uint8_t data[] = {0x0, 0x0, 0x0, 0x0};
display.setSegments(data);
To turn on all segments, use this command.
Uint8_t data[] = {0xff, 0xff, 0xff, 0xff};
display.setSegments(data);
display.encodeDigit
This fonction returns the 7 bits representation for the digit between 1 and 15.
Uint8_t data[] = {0x0, 0x0, 0x0, 0x0};
data[0]= display.encodeDigit(15);
display.setSegments(data);
Result: F000
Note: Release version 1.0.0 has bug for the representation of letter D in the TM1637Display.cpp
file. You need to change the code for this:
const uint8_t digitToSegment[] = {
// XGFEDCBA
0b00111111, // 0
0b00000110, // 1
0b01011011, // 2
0b01001111, // 3
0b01100110, // 4
0b01101101, // 5
0b01111101, // 6
0b00000111, // 7
0b01111111, // 8
0b01101111, // 9
0b01110111, // A
0b01111100, // B
0b00111001, // C
0b01011110, // D
0b01111001, // E
0b01110001 // F
};

Navigation menu