Scrolling text on GD2

[lightcalamar]

How to make text that scrolls in GD2 library? For example like this video;

[tftlcdcyg]

My friend, try this:


//#include <EEPROM.h>
#include <SPI.h>
#include <GD3.h>

float PX = -190; //límite izquierdo
// PX = 990;     //límite derecho

float VelX = 5;

void setup()
{
 GD.begin();
 GD.cmd_setrotate(0);
}

void loop()
{
 GD.ClearColorRGB(0x000030);
 GD.Clear();

//    if (PX>=990){PX=-190;}   //avance a la derecha
   if (PX>=990){VelX = (-1)*abs(VelX);}    if (PX<=-190){VelX = abs(VelX);}   //ambas direcciones
    Texto();
   PX=PX+VelX;    

 GD.swap();
}

void Texto()
{
 if (FT_810_ENABLE==1){GD.cmd_text(PX, GD.h / 2, 31, OPT_CENTER, "FT810  en linea");}
 if (FT_811_ENABLE==1){GD.cmd_text(PX, GD.h / 2, 31, OPT_CENTER, "FT811  en linea");}
 if (FT_812_ENABLE==1){GD.cmd_text(PX, GD.h / 2, 31, OPT_CENTER, "FT812  en linea");}
 if (FT_813_ENABLE==1){GD.cmd_text(PX, GD.h / 2, 31, OPT_CENTER, "FT813  en linea");}
}

[tftlcdcyg]

Or this:


//#include <EEPROM.h>
#include <SPI.h>
#include <GD3.h>

//PX = -190; //límite izquierdo
//PX = 990;     //límite derecho

float PX[10], VelX[10];

void setup()
{
 Serial.begin(9600);
 GD.begin();
 GD.cmd_setrotate(0);
 PX[1] = -190; VelX[1]=5;
 PX[2] = -190; VelX[2]=5;
 PX[3] = 990; VelX[3]=-5;
}

void loop()
{
 GD.ClearColorRGB(0x000030);
 GD.Clear();

   if (PX[1]>=990){VelX[1] = (-1)*abs(VelX[1]);}    if (PX[1]<=-190){VelX[1] = abs(VelX[1]);}   //ambas direcciones
    Texto(1, GD.h / 2);

   if (PX[2]>=990){PX[2]=-190;}   //avance a la derecha
    Texto(2, 120);

   if (PX[3]<=-190){PX[3]=990;}   //avance a la izquierda
    Texto(3, 360);    

   PX[1]=PX[1]+VelX[1];
   PX[2]=PX[2]+VelX[2];
   PX[3]=PX[3]+VelX[3];
 GD.swap();
}

void Texto(int IDTexto, int PY)
{
 if (FT_810_ENABLE==1){GD.cmd_text(PX[IDTexto], PY, 31, OPT_CENTER, "FT810  en linea");}
 if (FT_811_ENABLE==1){GD.cmd_text(PX[IDTexto], PY, 31, OPT_CENTER, "FT811  en linea");}
 if (FT_812_ENABLE==1){GD.cmd_text(PX[IDTexto], PY, 31, OPT_CENTER, "FT812  en linea");}
 if (FT_813_ENABLE==1){GD.cmd_text(PX[IDTexto], PY, 31, OPT_CENTER, "FT813  en linea");}
}

[jamesbowman]

This scrolls "hello world" from right to left, moving 2 pixels per frame:


#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>

void setup()
{
 GD.begin();
}

void loop()
{
 for (int x = 480; x > 0; x -= 2) {
   GD.ClearColorRGB(0x103000);
   GD.Clear();
   GD.cmd_text(x, 136, 31, OPT_CENTER, "Hello world");
   GD.swap();
 }
}
You can adjust the increment on the 'for' loop line to make it go slower or faster.

[lightcalamar]

Work fine!

Thanks friends tftlcdcyg and jamesbowman !
Checked all codes and working well. A pleasure!