Play two sliding animations at a time

Other Hardware Displays
1

Hi all,

I am using 4 number of 16x32 P10 LED in a combination of 32x64 - 2 Row and 2 Column.
I need to display two sliding animations on each row. Example - 1st row should display "HELLO TEAM" sliding text and 2nd row should display "WELCOME" sliding text.

with reference to this forum - Play different Animations at a time - DMD P10
I am successfully able to play different animations at a time but facing difficulty in playing two different sliding animation at the same time.

Please help.

Code for different animation at a time -

void setup()
{
  Timer1.initialize( 4000 );   // I find the default 5000 gives a visible flicker         
  Timer1.attachInterrupt( ScanDMD );  
  dmd.selectFont(SystemFont5x7);
  dmd.clearScreen( true );     // start with a blank screen
  dmd.drawMarquee("HELLO TEAM!",strlen("HELLO TEAM!"),0, 4);
}

void loop()
{
  int event_len1 = calStringWidth("TOGGLE");
  int event_len2 = calStringWidth("TEXT");


  if(topActive == false){
    topActive = true;
  }

  if (topActive && (millis() - lastTimeTop >= topPeriod)) {
    topActive =! dmd.stepSplitMarquee(0,16); // parameters are the top & bottom rows to be scrolled
    lastTimeTop = millis();
  } 

  if (bottomActive && (millis() - lastTimeBottom >= bottomPeriod)) { 
    dmd.drawString(event_len1,17,"TOGGLE",strlen("TOGGLE"),GRAPHICS_TOGGLE); // the stationary string
    dmd.drawString(event_len2,25,"TEXT",strlen("TEXT"),GRAPHICS_TOGGLE); // the stationary string
    lastTimeBottom = millis();
  } 
 }
2

Why do you do this ?

Code is not complete. Don’t post snippets (Snippets R Us!)

3

Hi @J-M-L ,
Regarding this -

if(topActive == false){
    topActive = true;
  }

I have added this part because once the sliding is finished, topActive =! dmd.stepSplitMarquee(0,16); the stepSplitMarquee func makes the topActive false, to start the sliding again, we reset the flag.

below is the complete code -

#include "SPI.h"        
#include "DMD.h"        
#include "TimerOne.h"
#include "SystemFont5x7.h"
#include "Arial14.h"

#define DISPLAYS_ACROSS 2
#define DISPLAYS_DOWN 2

DMD dmd( DISPLAYS_ACROSS , DISPLAYS_DOWN);

const char* name = "Hello Jane!";
const char* event = "Toggle Text";

const uint32_t topPeriod = 50;
uint32_t  lastTimeTop = -topPeriod;
bool topActive  = true;

const uint32_t bottomPeriod = 500;
uint32_t lastTimeBottom = -bottomPeriod;
bool bottomActive = true;

void ScanDMD()
{
  dmd.scanDisplayBySPI();
}

void setup()
{
  Timer1.initialize( 4000 );   // I find the default 5000 gives a visible flicker         
  Timer1.attachInterrupt( ScanDMD );  
  dmd.selectFont(SystemFont5x7);
  dmd.clearScreen( true );     // start with a blank screen
  Serial.begin(9600);
  dmd.drawMarquee("HELLO JANE!",strlen("HELLO JANE!"),0, 4);
}

int stringWidth(const char *bChars)
{
  int strWidth = 0;
  for (byte i = 0; i < strlen(bChars); i++) {  // step through the length of the string
    strWidth += dmd.charWidth(bChars[i]) + 1;  // increment by the width of this character in pixels,
                                               // plus the 1 pixel character spacing
  }
  return strWidth - 1;                         // don't allow for a character space at the end
}

int calStringWidth(const char* thisWord) {
  int Xstart = 31 - (stringWidth(thisWord) / 2);                  // work out where to display the first character
  if (0 > Xstart) Xstart = 0;
  return Xstart;
}

void loop()
{
  int event_len1 = calStringWidth("Toggle");
  int event_len2 = calStringWidth("Text");


  if(topActive == false){
    topActive = true;
  }

  if (topActive && (millis() - lastTimeTop >= topPeriod)) {
    
    topActive =! dmd.stepSplitMarquee(0,16); // parameters are the top & bottom rows to be scrolled
    lastTimeTop = millis();
  } 

  if (bottomActive && (millis() - lastTimeBottom >= bottomPeriod)) { 
    dmd.drawString(event_len1,17,"Toggle",strlen("Toggle"),GRAPHICS_TOGGLE); // the stationary string
    dmd.drawString(event_len2,25,"Text",strlen("Text"),GRAPHICS_TOGGLE); // the stationary string
    lastTimeBottom = millis();
  } 
 
  // here you have some business logic, non blocking. No delay
  }
4

Just get rid of the flag then

5

I understood. I removed those flags, currently was of no use. But my question is how can I play two sliding text at the same time in two rows.

6

I'm not sure I understand the question. You just need to take one step in one row and take one step in the other row when it's due

const uint32_t topPeriod = 50;
uint32_t  lastTimeTop = -topPeriod;

const uint32_t bottomPeriod = 500;
uint32_t lastTimeBottom = -bottomPeriod;

void setup() {
  // set up the environment, display what you want to scroll
}

void loop() 
{
  if (millis() - lastTimeTop >= topPeriod) {
    // here scroll the top one step
    lastTimeTop = millis();
  } 

  if (bottomActive && (millis() - lastTimeBottom >= bottomPeriod)) { 
    // here scroll the bottom one step
    lastTimeBottom = millis();
  } 
}
7

why do you slide the first text as whole string

but second as splitted to two parts?