Bitmap scrolling

edster99 · November 4, 2022, 10:00am

Hi all

Looking for a bit of direction. My objective is to display bitmaps on a 0.96" OLED, scrolling when I transition from one to the next. They will transition only when there is an input, and always in the same sequence. I have 26 images that I want to display. Each bitmap is the size of the screen (128x64). When I get to 26 I'll want to start from 1 again. It is a constraint that they must scroll not just replace. Therefore I will either be statically displaying one, or showing a bit of 2 of them when its moving. I've got all the bitmap arrays stored in PROGMEM and they display OK.

I currently have some I2C displays and they work fine - I am not sure if there will be speed issues with these, but a slow smooth transition is fine for my purposes.

My questions are : is there a library out there that would support this ? Could someone point me to a description of how scrolling is executed? I'm assuming it updates column by column, so if I wanted to control this myself I'd move the end-1 column to the end, the end-2 > end-1 etc and eventually add new data into the first column?

Any pointers gratefully received.

UKHeliBob · November 4, 2022, 10:51am

Please post your sketch that displays a singe static image but also contains the data for a second image

J-M-L · November 4, 2022, 10:54am

do you want scrolling from left to right or top to bottom?

+1 on posting your code and a couple pictures

edster99 · November 4, 2022, 11:42am

On the scrolling - I was assuming L to R although any direction is fine, as I will just orient the display as required. Code inbound in a bit for my 4 OLED display (its using aTCA9548A I2C multiplexer btw).
Edit : its only controlling 3 at present on lines 4,5,7 but I can run up to 8 off the multiplexer

edster99 · November 4, 2022, 1:20pm

All of this is just proof of concept - I only have one bmp in there but I would just add another
static const unsigned char PROGMEM logo_bmpx[] = {} statement with the relevant byte arrays

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
 
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

Adafruit_SSD1306 display0(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display1(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display2(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display3(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// one instance per screen

#define LOGO_HEIGHT   64
#define LOGO_WIDTH    128
static const unsigned char PROGMEM logo_bmp[] =
{ 0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x8f, 0xf0, 0x0f, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x07, 0xf0, 0x0f, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x07, 0xf0, 0x0f, 0xe0, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x03, 0xe0, 0x07, 0xc0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x01, 0x00, 0x00, 0x80, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x38, 0x00, 0x0f, 0xf0, 0x00, 0x1c, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x01, 0xff, 0xff, 0x80, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x03, 0xff, 0xff, 0xe0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x0f, 0xff, 0xff, 0xf0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x1f, 0xff, 0xff, 0xf8, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x3f, 0xff, 0xff, 0xfc, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x00, 0x3f, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x3f, 0xff, 0xff, 0xfc, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x1f, 0xff, 0xff, 0xf8, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x0f, 0xff, 0xff, 0xf0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x07, 0xff, 0xff, 0xe0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x01, 0xff, 0xff, 0x80, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x38, 0x00, 0x0f, 0xf0, 0x00, 0x1c, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x01, 0x00, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x03, 0xe0, 0x07, 0xc0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x07, 0xf0, 0x0f, 0xe0, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x07, 0xf0, 0x0f, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x8f, 0xf0, 0x0f, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };

  // Select I2C BUS
void TCA9548A(uint8_t bus){
  Wire.beginTransmission(0x70);  // TCA9548A address
  Wire.write(1 << bus);          // send byte to select bus
  Wire.endTransmission();
  Serial.print(bus);
}

void setup() {
  Serial.begin(115200);
  Wire.begin();
  delay(2000);
  Serial.println(F("Starting!"));

 TCA9548A(5);
 
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display0.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display0.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display0.clearDisplay();
  // Refresh (apply command)
  display0.display();
 
  // Set color of the text
  display0.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display0.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display0.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display0.display();


TCA9548A(4);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display1.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display1.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display1.clearDisplay();
  // Refresh (apply command)
  display1.display();
 
  // Set color of the text
  display1.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display1.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display1.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display1.display();

TCA9548A(7);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display2.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display2.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display2.clearDisplay();
  // Refresh (apply command)
  display2.display();
 
  // Set color of the text
  display2.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display2.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display2.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display2.display();
}
 
void loop() {
 TCA9548A(4);
     delay(1000);

  display1.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display1.drawBitmap(0,0,logo_bmp,128,64,WHITE);
  display1.setCursor(70, 25);
  // Set color of the text and color of the background
  display1.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
  display1.setTextSize(3);
  display1.print(F("XXX"));
   display1.invertDisplay(true);
 display1.display();
  delay(1000);

  TCA9548A(7);

// Clear the buffer
  display2.clearDisplay();
  // Refresh (apply command)
   display2.setCursor(70, 25);
  // Set color of the text and color of the background
  display2.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
  display2.setTextSize(3);
  display2.print(F("ZZZ"));
     display2.invertDisplay(true);
 display2.display();
  delay(1000);
  
}

J-M-L · November 4, 2022, 1:46pm

to answer your question, to draw the scrolling image it depends on the hardware

some support messing around with the framebuffer, so you would translate the content in one direction and then paint the missing line or column. That would be the fastest way probably but I don't know if your screen offers this capability.

otherwise you have to paint part of the screen with a decreasing part of the first image and the other part of the screen with an increasing part of the other image and repeat until the first image is gone.

this can be done in different ways.

If the bitmap organisation in memory is line by line and you scroll vertically, then it's easy as you don't need to mess with an intermediary buffer

When you want to start scrolling, You ask to paint at (0,0) a bitmap which starts at the second line of image 1 and is 63 lines high and then you pain at (0,63) a bitmap which starts at the beginning of image 2 and is 1 line high

then you repeat and ask to paint at (0,0) a bitmap which starts at the third line of image 1 and is 62 lines high and then you pain at (0,62) a bitmap which starts at the beginning of image 2 and is 2 lines high

rinse and repeat until the first image is gone

if the data is organised by columns in memory then it would be better to scroll horizontally

if you want to scroll differently then you need to build an intermediary buffer that you fill with the relevant bytes of both images and then push that buffer to the screen. That would be the slowest version as you need to move lots of bits around.

edster99 · November 4, 2022, 1:58pm

Thanks, thats interesting. I guess I'd need to go back to find the data sheet to know if there is some framebuffer capabilities. Is that functionality already built into the 1306 library? Or could you point me at a sketch that includes it?

Cheers

J-M-L · November 4, 2022, 2:05pm

if you look at the Adafruit_SSD1306 library they have scrolling functions

github.com

adafruit/Adafruit_SSD1306/blob/88711efc3e4b4a1a3fb238a1c5aa9590697f9c02/Adafruit_SSD1306.cpp#L1039


      
              SSD1306_MODE_DATA
              while (count--)
                SPIwrite(*ptr++);
            }
            TRANSACTION_END
          #if defined(ESP8266)
            yield();
          #endif
          }
          
          
// SCROLLING FUNCTIONS -----------------------------------------------------
          
          
/*!
              @brief  Activate a right-handed scroll for all or part of the display.
              @param  start
                      First row.
              @param  stop
                      Last row.
              @return None (void).
          */
          // To scroll the whole display, run: display.startscrollright(0x00, 0x0F)

that's what you should explore. they have an example with text scrolling

edster99 · November 4, 2022, 2:46pm

Great, thanks. I will experiment with these. I've just reread your explanation and got it this time, I need to experiment and see if I can write a specific number of lines from the image.

J-M-L · November 4, 2022, 3:31pm

you call

display0.drawBitmap(0,0,logo_bmp,128,64,WHITE);

so you display at 0,0 logo_bmp is the pointer to the start of the data (you can do some maths to be at the right position in memory) and 64 is the number of lines

I would assume (if the data is organised in lines in memory) and a pixel is a byte that

display0.drawBitmap(0,0,logo_bmp+10*64,128,64-10,WHITE);

will actually only display the bottom part of the image, skipping the top 10 lines

edster99 · November 4, 2022, 3:35pm

I was just coming to the same sort of conclusion!

edster99 · November 4, 2022, 6:46pm

close but no cigar: its logo_bmp+10*16
because they are 4-bit elements in the byte array... So now it's scrolling really quite smoothly on the first element. With a 'follower' it looks liek this

 display0.clearDisplay();

     for (currentYloc0=0;currentYloc0<64;currentYloc0++)
  // Set text size multiplier (x1 standard size)
{
  
   display0.clearDisplay();
   display0.drawBitmap(0,0,logo_bmp+(16*currentYloc0),128,64-currentYloc0,WHITE);
   display0.drawBitmap(0,64-currentYloc0,yRose,128,currentYloc0,WHITE);
   display0.invertDisplay(false);
   display0.display();
 //delay(100);
 }

Thanks for your assistance, I am now in good shape

,

J-M-L · November 4, 2022, 9:12pm

OK

That’s why I mentioned

Do I get the cigar then ?

edster99 · November 4, 2022, 9:36pm

Go on then

edster99 · November 4, 2022, 7:45pm

Hi all
I've got some working code which scrolls bitmaps on an OLED display. As one leaves the screen the next one takes up its place. It's pretty neat - lots of thanks to J-M-L and others. Currently I have two bitmaps, so I have manually made them swap places (see the main loop in the code). For my production version I will need 26 of them to display in a specific sequence and loop around to the beginning once completed. They will advance 1 on a trigger. That would be horrible to do manually. What I want to do is create all my bitmaps as byte arrays, stored in PROGMEM (as now) but load them into my processing code so that I always have an 'arriving image' and a 'leaving image' loaded from there that I can execute.
As the arrays are currently in a structure like this :

'static const unsigned char PROGMEM logo_bmp[] ='

I've tried various structures like:

unsigned char current_bmp[512] = logo_bmp; and suchlike, but get errors like this

exit status 1
array must be initialized with a brace-enclosed initializer

I'm suspecting that this is probably a question involving pointers but I'm not up to speed on them yet. Can anyone point me in the right direction?

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
 
int currentXloc0 = 0;
int currentYloc0 = 0; 

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

Adafruit_SSD1306 display0(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display1(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display2(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display3(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define LOGO_HEIGHT   64
#define LOGO_WIDTH    128

// this is the first BMP byte array
static const unsigned char PROGMEM logo_bmp[] =
{ 0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x8f, 0xf0, 0x0f, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x07, 0xf0, 0x0f, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x07, 0xf0, 0x0f, 0xe0, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x03, 0xe0, 0x07, 0xc0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x01, 0x00, 0x00, 0x80, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x38, 0x00, 0x0f, 0xf0, 0x00, 0x1c, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x01, 0xff, 0xff, 0x80, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x03, 0xff, 0xff, 0xe0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x0f, 0xff, 0xff, 0xf0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x1f, 0xff, 0xff, 0xf8, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x3f, 0xff, 0xff, 0xfc, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x00, 0x3f, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfe, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0x00, 0x7f, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x3f, 0xff, 0xff, 0xfc, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x1f, 0xff, 0xff, 0xf8, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x0f, 0xff, 0xff, 0xf0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xe0, 0x00, 0x07, 0xff, 0xff, 0xe0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf0, 0x00, 0x01, 0xff, 0xff, 0x80, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xf8, 0x38, 0x00, 0x0f, 0xf0, 0x00, 0x1c, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x01, 0x00, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xf8, 0x03, 0xe0, 0x07, 0xc0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xfc, 0x07, 0xf0, 0x0f, 0xe0, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x07, 0xf0, 0x0f, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0x8f, 0xf0, 0x0f, 0xf1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };

// this is the second BMP byte array

const unsigned char yRose[] PROGMEM = {
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xfe, 0x7f, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0xf7, 0xe7, 0xc3, 0xef, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x6f, 0xfc, 0x3f, 0xf0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xf0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x1f, 0xff, 0xff, 0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x1f, 0xff, 0xff, 0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x1f, 0xff, 0xff, 0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xf0, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x0f, 0xff, 0xff, 0xf0, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0x8f, 0xff, 0xff, 0xf0, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xc7, 0xff, 0xff, 0xe3, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfd, 0xff, 0xe7, 0xff, 0xff, 0xe7, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfd, 0xff, 0xf3, 0xc6, 0x6b, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0x7c, 0x3e, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfb, 0x7f, 0xfe, 0xbe, 0x7b, 0x7f, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xfd, 0xfe, 0x7f, 0xbf, 0xfd, 0xdf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xf6, 0xff, 0xff, 0x6f, 0xfd, 0xcf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf2, 0xff, 0xef, 0xff, 0xff, 0xf7, 0xfd, 0xef, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xef, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xef, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xf7, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xed, 0xff, 0xff, 0xff, 0xff, 0xf7, 0xfe, 0xf7, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xef, 0xfe, 0x4f, 0xff, 0xef, 0xf0, 0xff, 0x7b, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdb, 0xff, 0x83, 0xf1, 0x9f, 0xc1, 0xff, 0xfb, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdb, 0xff, 0xdf, 0xf7, 0xef, 0xfb, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xef, 0xf7, 0xfe, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xef, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xef, 0xf7, 0xfb, 0xff, 0xfb, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xdf, 0xff, 0x7f, 0xcf, 0xf3, 0xff, 0xff, 0xfb, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xef, 0xff, 0x5f, 0xf7, 0xef, 0xfe, 0xff, 0xf7, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf7, 0xff, 0xff, 0xfb, 0xdf, 0xf7, 0xff, 0xe7, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf3, 0xff, 0xbf, 0xfe, 0x7f, 0xfd, 0xff, 0xc7, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xe0, 0x01, 0xaf, 0xff, 0xff, 0xfd, 0x80, 0x03, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xe0, 0x07, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x03, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xc0, 0x1f, 0xdf, 0xff, 0xff, 0xfb, 0xf0, 0x01, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0x80, 0x3f, 0xff, 0x3f, 0xfd, 0xff, 0xfc, 0x00, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0x80, 0x7f, 0xf0, 0x3f, 0xfc, 0x6f, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xc0, 0xff, 0xfc, 0x7f, 0xfc, 0x3f, 0xff, 0x03, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xfc, 0x7f, 0xfe, 0x3f, 0xff, 0x3f, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xfc, 0xbe, 0x7d, 0x3f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xcf, 0xfb, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xfe, 0x77, 0xff, 0xff, 0xff, 0xff, 0xdf, 0x7f, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0x79, 0xff, 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xbe, 0x7f, 0xfe, 0x7f, 0xfc, 0xfc, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xcf, 0xbf, 0xfe, 0x7f, 0xfb, 0xf3, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0xdf, 0xfe, 0x7f, 0xf7, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xf9, 0xef, 0xfc, 0x3f, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x73, 0xfc, 0x3f, 0xdf, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xf8, 0x1f, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f, 0xf0, 0x1f, 0xfd, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xcf, 0xe0, 0x0f, 0xf3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0x90, 0x0b, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0xf8, 0x1e, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};

  // Select I2C BUS from the multiplexer
void TCA9548A(uint8_t bus){
  Wire.beginTransmission(0x70);  // TCA9548A address
  Wire.write(1 << bus);          // send byte to select bus
  Wire.endTransmission();
  Serial.print(bus);
}

void setup() {
  Serial.begin(115200);
  Wire.begin();
  delay(2000);
  Serial.println(F("Starting!"));

// select channel 5 
 TCA9548A(5);
 
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display0.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display0.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display0.clearDisplay();
  // Refresh (apply command)
  display0.display();
 
  // Set color of the text
  display0.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display0.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display0.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display0.display();

//select channel 4
TCA9548A(4);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display1.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display1.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display1.clearDisplay();
  // Refresh (apply command)
  display1.display();
 
  // Set color of the text
  display1.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display1.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display1.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display1.display();

// select channel 7
TCA9548A(7);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display2.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));
 
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display2.display();
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer
  display2.clearDisplay();
  // Refresh (apply command)
  display2.display();
 
  // Set color of the text
  display2.setTextColor(SSD1306_WHITE);
  // Set position of cursor
  display2.setCursor(0, 0);
  // Set text size multiplier (x1 standard size)
display2.drawBitmap(0,0,logo_bmp,128,64,WHITE);
display2.display();
}
 
void loop() {
//back to channel 5
 TCA9548A(5);

     for (currentYloc0=0;currentYloc0<64;currentYloc0++)
  // for each vertical line draw the first image at the same point, starting one line lower
// and draw more lines from the second image underneath, starting one line higher
{
   display0.clearDisplay();
   display0.drawBitmap(0,0,logo_bmp+(16*currentYloc0),128,64-currentYloc0,WHITE);
   display0.drawBitmap(0,64-currentYloc0,yRose,128,currentYloc0,WHITE);
   display0.invertDisplay(false);
   display0.display();
 }

//now swap the images around and it appears to be a continuous loop
 for (currentYloc0=0;currentYloc0<64;currentYloc0++)
  // Set text size multiplier (x1 standard size)
{
   display0.clearDisplay();
   display0.drawBitmap(0,0,yRose+(16*currentYloc0),128,64-currentYloc0,WHITE);
   display0.drawBitmap(0,64-currentYloc0,logo_bmp,128,currentYloc0,WHITE);
   display0.invertDisplay(false);
   display0.display();
 //delay(100);
 }
 
}

jremington · November 4, 2022, 8:16pm

Please do not start a new thread on the same project.

One approach would be to copy the two "active" arrays from program memory to ram.

edster99 · November 4, 2022, 9:35pm

Sorry I hadnt seen any comments about keeping all different questions together, I assumed as it was a coding question not hardware related it shouldnt be mashed on the end. But i'll know for the future.

And yes, the approach to copy the active arrays is what I want to do, but cant make it work. That's what the question is - how do I copy them.

jremington · November 4, 2022, 9:44pm

I've asked the moderator to merge the two threads.

There are a number of special functions that allow you to copy data from program memory to RAM. The Arduino Reference pages are the first resource you should consult. The pgmspace.h library reference is the second, in this case.

red_car · November 4, 2022, 9:51pm

Check out...

memcpy_P(destArray, srcArray, size)

edster99 · November 4, 2022, 10:12pm

Right, so I am confused then. It said on the first thread that once it was marked as 'solved' that you should not add any more details. Is that incorrect?

And yes, I did look at the Arduino reference but couldn't find anything in there that seemed related to my question. And I've never come across the second one before, so I'll take a look.

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