LED P10 (32x16) with esp32

Other Hardware LEDs and Multiplexing
1

i am integrating ledp10 single color matrix(32x16) using this connection

IMG20240228193109
IMG202402281931091920×3415 281 KB

and code is an example od dmd32 library-`#include <DMD32.h>
#include "fonts/SystemFont5x7.h"
#include "fonts/Arial_Black_16_ISO_8859_1.h"

//Fire up the DMD library as dmd
#define DISPLAYS_ACROSS 1
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);

//Timer setup
//create a hardware timer of ESP32
hw_timer_t * timer = NULL;

/--------------------------------------------------------------------------------------
Interrupt handler for Timer1 (TimerOne) driven DMD refresh scanning, this gets
called at the period set in Timer1.initialize();
--------------------------------------------------------------------------------------/
void IRAM_ATTR triggerScan()
{
dmd.scanDisplayBySPI();
}

/--------------------------------------------------------------------------------------
setup
Called by the Arduino architecture before the main loop begins
--------------------------------------------------------------------------------------/
void setup(void)
{

// return the clock speed of the CPU
uint8_t cpuClock = ESP.getCpuFreqMHz();

// Use 1st timer of 4
// devide cpu clock speed on its speed value by MHz to get 1us for each signal of the timer
timer = timerBegin(0, cpuClock, true);
// Attach triggerScan function to our timer
timerAttachInterrupt(timer, &triggerScan, true);
// Set alarm to call triggerScan function
// Repeat the alarm (third parameter)
timerAlarmWrite(timer, 300, true);

// Start an alarm
timerAlarmEnable(timer);

//clear/init the DMD pixels held in RAM
dmd.clearScreen( true ); //true is normal (all pixels off), false is negative (all pixels on)
Serial.begin(115200);
}

/--------------------------------------------------------------------------------------
loop
Arduino architecture main loop
--------------------------------------------------------------------------------------/
void loop(void)
{
dmd.clearScreen( true );
dmd.selectFont(Arial_Black_16_ISO_8859_1);
// Français, Österreich, Magyarország
const char MSG = "Fran""\xe7""ais, ""\xd6""sterreich, Magyarorsz""\xe1""g";
dmd.drawMarquee(MSG,strlen(MSG),(32DISPLAYS_ACROSS)-1,0);
long start=millis();
long timer=start;
while(1){
if ((timer+30) < millis()) {
dmd.stepMarquee(-1,0);
timer=millis();
}
}
}`

and i found output like this -

IMG20240228193044
IMG202402281930441920×1080 183 KB

i have checked all connection properly.

2

A still image doesn't say much about scrolling text. Did you try to light on a single pixel in defined x, y point? Or a line from left to right?

3

no i did not try any single pixel, i am using example of library, i have also tried another code ,code has been run on serial monitor but module didnt give any response, its always looks like above image.

4

What module did you exactly get? You hooked it up as 1/4 scan (using A and B) but it could be 1/8 scan (using A, B and C). Maybe it uses 2 color channels.

5

@Rintin , OP said that it is a monochrome panel. As far as I know, all monochromes are only 1/4

@piyoosh
try the code below and show us the video

void loop(void)
{
unsigned long timer = millis();
uint16_t fg = 
dmd.clearScreen( true );
while(1) {
 if (millis() - timer > 30) {
   for (int i = 0; i < 16; i++) {
        for (int j = 0; j < 32; j++) {
            dmd.drawPixel(j,i, GRAPHICS_NORMAL, 1);
            delay(30);
        }
   }
  timer=millis();
  }
}
}
6

no it is 1/4

7 
#include <DMD32.h>
#include "fonts/SystemFont5x7.h"
#include "fonts/Arial_black_16.h"

#define DISPLAYS_ACROSS 1
#define DISPLAYS_DOWN 1

DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);

void setup() {
  Serial.begin(115200);
  dmd.clearScreen(true);
}

void loop() {
  dmd.selectFont(SystemFont5x7);
  dmd.clearScreen(true);
  dmd.drawString(0, 0, "Hello, World!", 12, GRAPHICS_NORMAL);
  delay(2000);
}

display is not working
8

It is not my code.

9

I found a lead to draw different-different graphic image on led matrix with arduino but still i didn`t undestand why module not workingh for esp32 while i am making all connection according dmd32 library.

10

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