Monochrome P10 LED Matrix with 64x16 (32x16 + 32x16 Two panel in series) using stm32f103.

[nawab-sw]

I am working on monochrome led matrix size 64x16 (32x16 + 32x16 Two panel in series) by using stm32f103, I want to Display WELCOME moving across the display. but not display well, video is attached kindly what i am doing wrong, all the connection and wiring is well connected and i am suing spi2 .thank you in advance..

https://github.com/board707/DMD_STM32/assets/49905624/a97cdade-74e6-4e07-8fa7-68a1d9c8cdcd

I hone for positive result and code is below:

/*-------------------------------------------------------------------------------------- Demo code for DMD panels

DMD_STM32a example code for STM32F103xxx board ------------------------------------------------------------------------------------- / // choose between Parallel ans SPI wiring // comment line below for SPI connection //#define DMD_PARA /-------------------------------------------------------------------------------------- Includes --------------------------------------------------------------------------------------*/

if defined(DMD_PARA)

include "DMD_Monochrome_Parallel.h"

else

include "DMD_MonoChrome_SPI.h"

endif

// Fonts includes

include "st_fonts/UkrRusArial14.h"

pragma GCC diagnostic ignored "-Wnarrowing"

pragma GCC diagnostic ignored "-Woverflow"

include "gfx_fonts/GlametrixLight12pt7b.h"

include "gfx_fonts/GlametrixBold12pt7b.h"

pragma GCC diagnostic warning "-Wnarrowing"

pragma GCC diagnostic warning "-Woverflow"

//Number of panels in x and y axis

define DISPLAYS_ACROSS 2

define DISPLAYS_DOWN 1

// Enable of output buffering // if true, changes only outputs to matrix after // swapBuffers(true) command // If dual buffer not enabled, all output draw at matrix directly // and swapBuffers(true) cimmand do nothing

define ENABLE_DUAL_BUFFER true

// ----- Select pins for P10 matrix connection ------------ // pins A, B, SCLK may be any digital I/O, pin nOE should be Timer3 PWM pin as PB0,PB1 // if connect as SPI, do not use corresponding MiSO pin - PA6 for SPI1 and PB14 for SPI2

define DMD_PIN_A PA11

define DMD_PIN_B PA12

define DMD_PIN_nOE PB1

//#define DMD_PIN_nOE PA6

define DMD_PIN_SCLK PA15

//#define DMD_PIN_SCLK PB4

// pins for SPI connect // SPI specific pins as CLK and R_DATA has predefined values: // for SPI(1) CLK = PA5 R_DATA = PA7 // for SPI(2) CLK = PB13 R_DATA = PB15 // --------------------------------------------------------

//=== Config for Parallel connect ====

if defined(DMD_PARA)

//pins for rows at x axis // example for two rows // all those pins must be selected from same port! uint8_t pins[] = { PA5, PA7, PA6 }; // CLK , row1, row 2

//Fire up the DMD object as dmd DMD_Monochrome_Parallel dmd(DMD_PIN_A, DMD_PIN_B, DMD_PIN_nOE, DMD_PIN_SCLK, pins, DISPLAYS_ACROSS, DISPLAYS_DOWN,ENABLE_DUAL_BUFFER);

else

//=== Config for SPI connect ==== SPIClass dmd_spi(2); DMD_MonoChrome_SPI dmd(DMD_PIN_A, DMD_PIN_B, DMD_PIN_nOE, DMD_PIN_SCLK, DISPLAYS_ACROSS, DISPLAYS_DOWN, dmd_spi, ENABLE_DUAL_BUFFER);

endif

// --- Define fonts ---- // DMD.h old style font DMD_Standard_Font UkrRusArial_F(UkrRusArial_14);

// GFX font with sepatate parts for Latin and Cyrillic chars DMD_GFX_Font GlametrixL((uint8_t)&GlametrixLight12pt7b,(uint8_t)&GlametrixLight12pt8b_rus,0x80,13);

/*-------------------------------------------------------------------------------------- UTF8 char recoding

--------------------------------------------------------------------------------------/ int utf8_rus(char dest, const unsigned char* src) {

uint16_t i, j; for ( i =0, j =0; src[i]; i++) { if ((src[i] == 0xD0 )&& src[i+1]) { dest[j++] = src[++i] - 0x10;} else if ((src[i] == 0xD1 )&& src[i+1]) {dest[j++] = src[++i] + 0x30; } else dest[j++] = src[i]; } dest[j] ='\0'; return j; }

/-------------------------------------------------------------------------------------- setup Called by the Arduino architecture before the main loop begins --------------------------------------------------------------------------------------/

void setup(void) {

// initialize DMD objects // scan DMD row each 700 us dmd.init(700); dmd.setBrightness(80);

}

/-------------------------------------------------------------------------------------- loop Arduino architecture main loop --------------------------------------------------------------------------------------/ void loop(void) {

// text
const char m[] = "WELCOME!";
// transcode message to UTF for use with GFX fonts
char k[30];
utf8_rus(k, (const unsigned char* )m);

// but initially select standard font
dmd.selectFont(&UkrRusArial_F);

// shift steps in pixels for running text (positive - shift right, negative - left)
int8_t step[] = { 1,-1,-2,2 };
// running text shift interval
uint16_t interval = 50;

long prev_step = millis();
uint8_t i = 0, b = 0;
uint8_t test = 255;
uint8_t test_cnt = 4;

 // Cycle for tests:
// -- running texts moving at x and y axis with single and double speed
// -- brightness control
// -- vertical scrolling message
while (1) {
    if ((millis() - prev_step) > interval) {
        if (test >= test_cnt) {
            test = 0;
            // draw message
            dmd.drawMarqueeX(m, -1 * (dmd.stringWidth(m)), 0);
            dmd.swapBuffers(true);

        }
        switch (test) {
          // moving text at x axis
        case 0:
            if (dmd.stepMarquee(step[i], 0) & 1) { // if text is reached screen bounds

                dmd.clearScreen(true);
                i++;
                // if all moving finished
                if (i > 3) {
                  // go to next stage
                    i =0;
                    test++;
                    dmd.drawMarqueeX(m, 0, 0);
                }
                else {
                    if (step[i] < 0) dmd.drawMarqueeX(m, dmd.width() - 1, 0);
                    else dmd.drawMarqueeX(m, -1 * dmd.stringWidth(m), 0);
                }
            }
            else {

                if (step[i] != 1) dmd.drawFilledBox(0, 0, 5, dmd.height() - 1, GRAPHICS_INVERSE);
            }
            // output mem buffer to matrix
            dmd.swapBuffers(true);
            break;

        // change brightness
        case 1:
            b++;
            dmd.setBrightness(b);
            if (b > 200) {
                test++;
                b = 80;
                i = 0;
                dmd.setBrightness(b);
                dmd.drawMarqueeX(m, 0, 0);
            }
            dmd.swapBuffers(true);
            break;

        // moving text at y axis
        case 2:
            if (dmd.stepMarquee(0, step[i]) & 1) {

                // clear the screen
                dmd.clearScreen(true);
                // select new moving speed
                i++;
                // if all moving finished
                if (i > 3) {
                  // go to next stage
                    test++;
                    // select GFX font for vertical scroll
                    dmd.selectFont(&UkrRusArial_F);
                    dmd.drawMarquee(k, strlen(k), dmd.width() - 1, 0, 1);

                }
                else {
                    if (step[i] < 0) dmd.drawMarqueeX(m, 0, dmd.height());
                    else dmd.drawMarqueeX(m, 0, 0);
                }
            }
            // output mem buffer to matrix
            dmd.swapBuffers(true);
            break;

        // vertical scrolling    
        case 3:

            dmd.stepMarquee(-1, 0, 1);
            dmd.swapBuffers(true);
            break;

        }

        prev_step = millis();

    }
}

}

[nawab-sw]

PROBLEM RESOLVED

[board707]

I apologize for the delay in response. What was the issue?

[nawab-sw]

Thank you very much for your response Problem is now solved.

Thanx for supporting us

On Thu, Jan 18, 2024, 2:30 PM board707 @.***> wrote:

I apologize for the delay in response. What was the issue?

— Reply to this email directly, view it on GitHub https://github.com/board707/DMD_STM32/issues/69#issuecomment-1898059562, or unsubscribe https://github.com/notifications/unsubscribe-auth/AL4X7WA2XOLMDFJWBAKRRSDYPDQA7AVCNFSM6AAAAABB6FVAFSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQOJYGA2TSNJWGI . You are receiving this because you authored the thread.Message ID: @.***>