Hi, Iam new to arduino.
(LED Display Board using P10 LED Matrix Display and Arduino).
Problem 1 :
I did same wiring but then remaining of led lights also tend to glow somewhat dimmer which were not given as inputs (characters,strings,numeric). Should I code something to set frequency or setpixel to turn off. I bought this display from my region which is of model P10 -(1R)-V806F.
Problem 2 :
I'm using DMD2 library. I want to use write function which takes input from Serial.
But this function has some limitation of scrolling not as that of DMD library. Slight change is required, but i want to know whether i want to edit in library or do something else.
Thanks in advance. It would be great if people would lend a hand for me.
From my point view, this board manufacturer P10 -(1R)-V806F is defective.
This product is failure unless he provides code for Polarization(Data and OE).
At setBrightness(255), background led lights should not glow.
I had followed correct circuit diagram but in the end,unsatisfied results.
As a request Arduino people can convey to the concerned manufacturer of about the product.
If the issue prevails, please don't buy this P10model P10 -(1R)-V806F.
For e.g. Look signs of DataPolar and OE Polar.These two pic, i had configured successfully and integrated in my product with the help of Powerled. But the current board P10 -(1R)-V806F, I am unable to configure. Its ok, but I think we can control through arduino uno setup. That's why I stated either manufacturer has to provide additional details or arduino person has to land a help.
It would be great help for me. Code isn't extraordinary, simply took Scrolling program from LED Display Board using P10 LED Matrix Display and Arduino (circuitdigest.com)
/*
Test sketch for split screen scrolling
NOTE that this sketch uses the Freetronics version of the DMD library available here:
https://github.com/freetronics/DMD/
but with the additional dmd.stepSplitMarquee() function.
I also suggest that you make sure this has been changed DMD.cpp
change the line:
SPI.setClockDivider(SPI_CLOCK_DIV128);
to:
SPI.setClockDivider(SPI_CLOCK_DIV2); // system clock / 2 = 8MHz SPI CLK to shift registers
This provides a marked improvement in the DMD update time within the interrupt routine.
*/
#include "SPI.h"
#include "DMD.h"
#include "TimerOne.h"
#include "SystemFont5x7.h"
#define DISPLAYS_ACROSS 2
#define DISPLAYS_DOWN 1
DMD dmd( DISPLAYS_ACROSS , DISPLAYS_DOWN);
void ScanDMD()
{
dmd.scanDisplayBySPI();
}
void setup()
{
Timer1.initialize( 5000 ); // I find the default 5000 gives a visible flicker
Timer1.attachInterrupt( ScanDMD );
dmd.selectFont(SystemFont5x7);
dmd.clearScreen( true ); // start with a blank screen
}
void loop()
{
unsigned long time;
int n;
boolean ret = false;
// Show some stationary text on the bottom half, and scrolling text on the top half
// scrolls 3 times
dmd.drawString(0,8,"Stays still",11,GRAPHICS_NORMAL); // the stationary string
dmd.drawMarquee("Scrolling text",14,0,0); // set up the marquee
time = millis();
n=0;
while(n<3) {
while (!ret) {
if ((time+30) < millis()) {
ret = dmd.stepSplitMarquee(0,7); // parameters are the top & bottom rows to be scrolled
time = millis();
}
}
ret = false;
n++;
}
dmd.clearScreen( true );
// Now some stationary text on the top half, and scrolling text on the bottom half
// scrolls for 10 seconds
dmd.drawString(0,0,"Stays still",11,GRAPHICS_NORMAL); // stationary text
dmd.drawMarquee("Scrolling text",14,0,8); // set up the marquee
time = millis();
while ((millis() - time)<10000){ // loop for 10 seconds
dmd.stepSplitMarquee(8,15); // only scroll rows 8 to 15
delay(30);
} // a slightly different way to loop for stepping the marquee
// note that this does not test for completion of the scroll, but continues until
// the 10 second time has expired
dmd.clearScreen( true );
// Now a bit of fun
dmd.drawString(0,-4,"vvvvvvvvvvv",11,GRAPHICS_NORMAL); // note the position is above a single DMD so
// only part of the text will be visible
dmd.drawString(0,13,"^^^^^^^^^^^",11,GRAPHICS_NORMAL); // and this is too far down a single DMD so
// only part will be visible
// these 2 lines above use partial characters displayed on the screen by placing the text at non-standard positions
// to give a graphical highlight effect.
dmd.drawMarquee("Scrolling text",14,0,5);
time = millis();
while ((millis() - time)<10000){ // again we will scroll for 10 seconds
dmd.stepSplitMarquee(5,11);
delay(30);
}
dmd.clearScreen( true );
}
Please give suggestion on the DMD library. Also I found that LedP10 libray gives the result what I want but has flickering issue. May be this LedP10 library is a headstart to study and solve this issue. I am having hard time to understand this library, like manual debugging.
