I am having difficulty attempting to use either the "Picopixel.h" or "TomThumb.h

Other Hardware LEDs and Multiplexing
1

I am having difficulty attempting to use either the "Picopixel.h" or "TomThumb.h" font files in my sketch.

I am programming to a Genuino Mega 2560 driving a 64x64 Led Matrix.

Use of the standard font works OK, but is too large for my project. I am desiring to use one of the smaller fonts.

Can someone help me either learn how to load the file or create my own font file.
Many thanks in advance

2

I'm assuming this question is about some library or sketch you found somewhere. Please post a link to it.

What did you try? What problem did you encounter?

3

This was a "matrix demo" found online.
The sketch in its original form was fine.
I want to use a smaller font in my sketch, I think a 4x6 font will work.

Here is the link to the sketch I am working on...

thanks

4

here it is in code form

/* Code by Maddy McGee
 * Updated 7/2/18
 * https://www.hackster.io/Maddy
 * https://www.hackster.io/Maddy/using-the-dfrobot-rgb-led-matrix-921141?f=1
 *
 * Results: White text that says "LED MATRIX" stays on the screen for 2000ms.
 * Then the text changes color through the rainbow and moves from the bottom of the screen to the top of the screen.
 */
#include <DFRobot_RGBMatrix.h> // Hardware-specific library
#include <Adafruit_GFX.h>
//#include "Dialog_plain_5.h"
#include "FreeMono9pt7b.h"

//variables for all DFRobot RGB Matrix programs
#define OE    9
#define LAT   10
#define CLK   11
#define A     A0
#define B     A1
#define C     A2
#define D     A3
#define E     A4
#define WIDTH 64
#define HEIGHT 64

DFRobot_RGBMatrix matrix(A, B, C, D, E, CLK, LAT, OE, false, WIDTH, HEIGHT);

  matrix.setFont(&FreeMono9pt7b);
  
//variables for this specific program
boolean isDown;//determines if the text is moving down
int y;//y position of the text
int c;//counter for changing text color
uint16_t text;//the text color 
const uint16_t BACK = matrix.Color333(0, 0, 0);//the background color is black

void setup() {
  matrix.begin();
  matrix.setFont(&FreeMono9pt7b);
  text = matrix.Color333(7, 7, 7); //set text color to white
  isDown = true;//text is moving down at start
  y = 2;//text starts in the middle
  
  // fill with the background color
  matrix.fillScreen(BACK);
  
  // format text and display before starting motion
  matrix.setTextSize(1);// size 1 is 8 'pixels' or LEDs tall
  matrix.setTextColor(text);
  matrix.setCursor(2, y);
  matrix.setTextColor(text);
  matrix.println("0123456789");

  delay(2000);
}

void loop() {
  //clear previous text
  matrix.setCursor(2, y);
  matrix.setTextColor(BACK);
  matrix.println("0123456789");

 //move next text
  if (isDown){
    if(y<63){
      y++;
    }else{
      isDown = false;
    }
  }else{
    if(y>0){
      y--;
    }else{
      isDown = true;
    }
  }
  
  //change color for next text
  if(c<43){
    c++;
  } else{
    c = 0;
  }
  changeTextColor(c);
  
  //print new text
  matrix.setCursor(2, y);
  matrix.setTextColor(text);
  matrix.println("0123456789");

  delay(150);
}

// Changes variable text to a color based on input integer from 0 to 43
// If the input is to great color is white, if the input is too low color is black
// As the input increments the colors change red, yellow, green, cyan, blue, magenta, back to almost red
void changeTextColor(int pos) {
  if(pos<0){
    //negative input, black
    text = matrix.Color333(0, 0, 0);
  } else if(pos < 7) {
    //red to yellow
    text = matrix.Color333(7, pos, 0);
  } else if(pos < 15) {
    //yellow to green
    text = matrix.Color333(14-pos, 7, 0);
  } else if(pos < 22) {
    //green to cyan
    text = matrix.Color333(0, 7, pos-14);
  } else if(pos < 30){
    //cyan to blue
    text = matrix.Color333(0, 29-pos, 7);
  } else if(pos < 37){
    //blue to magenta
    text = matrix.Color333(pos-29, 0, 7);
  } else if(pos < 44){
    //magenta to red
    text = matrix.Color333(7, 0, 44-pos);
  } else {
    //input out of bounds, white
    text = matrix.Color333(7, 7, 7);
  }
}