Arduino Nano with TM1637 4 digit display; I don't get it

Other Hardware Displays
1

Hi,

I work with Arduino Nano boards with ATmega168 processors. I have several and they all seem to work, blinking LEDs as per the sketch and I am fiddling around with Hall effect switches, all is fine. But I also have a 4 digit display with TM1637 driver and I cannot get it to work.

I installed and ran everything conform this:
http://robojax.com/learn/arduino/?vid=robojax-TM1637
The library is found, I cannot compile the test sketch. After I remove the arduino.h inclusion I can compile and upload, but it does not work. Is there some other variant of arduino.h I should have in the library?

BTW, this is the code (of which I remove the include arduino.h line to make it compilable):

#include <Arduino.h>
#include <TM1637Display.h>

// Module connection pins (Digital Pins)
#define CLK 2
#define DIO 3

// The amount of time (in milliseconds) between tests
#define TEST_DELAY   2000

const uint8_t SEG_DONE[] = {
	SEG_B | SEG_C | SEG_D | SEG_E | SEG_G,           // d
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,   // O
	SEG_C | SEG_E | SEG_G,                           // n
	SEG_A | SEG_D | SEG_E | SEG_F | SEG_G            // E
	};

TM1637Display display(CLK, DIO);

void setup()
{
}

void loop()
{
  int k;
  uint8_t data[] = { 0xff, 0xff, 0xff, 0xff };
  display.setBrightness(0x0f);

  // All segments on
  display.setSegments(data);
  delay(TEST_DELAY);

  // Selectively set different digits
  data[0] = 0b01001001;
  data[1] = display.encodeDigit(1);
  data[2] = display.encodeDigit(2);
  data[3] = display.encodeDigit(3);

  for(k = 3; k >= 0; k--) {
	display.setSegments(data, 1, k);
	delay(TEST_DELAY);
	}

  display.setSegments(data+2, 2, 2);
  delay(TEST_DELAY);

  display.setSegments(data+2, 2, 1);
  delay(TEST_DELAY);

  display.setSegments(data+1, 3, 1);
  delay(TEST_DELAY);


  // Show decimal numbers with/without leading zeros
  bool lz = false;
  for (uint8_t z = 0; z < 2; z++) {
	for(k = 0; k < 10000; k += k*4 + 7) {
		display.showNumberDec(k, lz);
		delay(TEST_DELAY);
	}
	lz = true;
  }

  // Show decimal number whose length is smaller than 4
  for(k = 0; k < 4; k++)
	data[k] = 0;
  display.setSegments(data);

	// Run through all the dots
	for(k=0; k <= 4; k++) {
		display.showNumberDecEx(0, (0x80 >> k), true);
		delay(TEST_DELAY);
	}

  display.showNumberDec(153, false, 3, 1);
  delay(TEST_DELAY);
  display.showNumberDec(22, false, 2, 2);
  delay(TEST_DELAY);
  display.showNumberDec(0, true, 1, 3);
  delay(TEST_DELAY);
  display.showNumberDec(0, true, 1, 2);
  delay(TEST_DELAY);
  display.showNumberDec(0, true, 1, 1);
  delay(TEST_DELAY);
  display.showNumberDec(0, true, 1, 0);
  delay(TEST_DELAY);

  // Brightness Test
  for(k = 0; k < 4; k++)
	data[k] = 0xff;
  for(k = 0; k < 7; k++) {
    display.setBrightness(k);
    display.setSegments(data);
    delay(TEST_DELAY);
  }
  
  // On/Off test
  for(k = 0; k < 4; k++) {
    display.setBrightness(7, false);  // Turn off
    display.setSegments(data);
    delay(TEST_DELAY);
    display.setBrightness(7, true); // Turn on
    display.setSegments(data);
    delay(TEST_DELAY);  
  }

  // Done!
  display.setSegments(SEG_DONE);

  while(1);
}

Help is appreciated,
Cheers,

Hugo

2

In the meantime I managed to include the arduino.h library, but still the display is dead.

Hugo

3

Read this thread! :grinning:

4

Marvelous, thanks. Fixed it.

Hugo