The screen seems to break when I call Update.write() #786

srinn · 2025-04-25T09:23:47Z

I wanted to show OTA progress to my led matrix like this: #50 (comment)
But I cannot print anything to my led matrix while OTA updating..
I think when the Update.write() is called, the led matrix screen breaks.

https://www.youtube.com/watch?v=WrNr8dVeAxI

I'm using esp32s3 n16r8 with PSRAM on.
I'm using 6 panels now, so I must enable SPIRAM_FRAMEBUFFER.

This is my sample test code:

platformio.ini

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:esp32-s3-devkitc-1]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
board_build.arduino.memory_type = qio_opi
board_build.flash_mode = qio
board_build.prsam_type = opi
board_upload.flash_size = 16MB
board_upload.maximum_size = 16777216
board_build.extra_flags = 
	-DBOARD_HAS_PSRAM
	-DSPIRAM_FRAMEBUFFER
monitor_speed = 115200
lib_deps = 
	mrfaptastic/ESP32 HUB75 LED MATRIX PANEL DMA Display@^3.0.12
	adafruit/Adafruit GFX Library@^1.12.1

ESP32HTTPUpdateServer.h (From ESP MQTT Client, avdovin/ESP MQTT Client)

#ifndef ESP32_HTTP_UPDATE_SERVER_H
#define ESP32_HTTP_UPDATE_SERVER_H

/*
  Based on the HTTP update exemple of ESP32 core
*/

#include <WebServer.h>
#include <Update.h>

#define ESP32_WEB_UPDATE_HTML "<html><body><form method='POST' action='' enctype='multipart/form-data'><input type='file' name='update'><input type='submit' value='Update'></form></body></html>"
#define ESP32_WEB_UPDATE_SUCCESS_RESPONSE "<META http-equiv=\"refresh\" content=\"10;URL=/\">Update Success! Rebooting...\n"

class ESP32HTTPUpdateServer
{
private:
  WebServer* _server;

  String _username;
  String _password;
  bool _serialDebugging;

public:
  ESP32HTTPUpdateServer(bool serialDebugging = false)
  {
    _server = NULL;
    _username = "";
    _password = "";
  }

  void setup(WebServer* server, const char* path = "/", const char* username = "", const char* password = "")
  {
    _server = server;
    _username = username;
    _password = password;

    // Get of the index handling
    _server->on(path, HTTP_GET, [&]() {
      Serial.println("GET requested");
      // Force authentication if a user and password are defined
      if (_username.length() > 0 && _password.length() > 0 && !_server->authenticate(_username.c_str(), _password.c_str()))
        return _server->requestAuthentication();

      _server->sendHeader("Connection", "close");
      _server->send(200, "text/html", ESP32_WEB_UPDATE_HTML);
    });

    // Post of the file handling
    _server->on(path, HTTP_POST, [&]() {
      _server->client().setNoDelay(true);
      _server->send_P(200, "text/html", (Update.hasError()) ? "FAIL" : ESP32_WEB_UPDATE_SUCCESS_RESPONSE);
      delay(100);
      _server->client().stop();
      ESP.restart();
    }, [&]() {
      HTTPUpload& upload = _server->upload();

      if (upload.status == UPLOAD_FILE_START) 
      {
        // Check if we are authenticated
        if (!(_username.length() == 0 || _password.length() == 0 || _server->authenticate(_username.c_str(), _password.c_str())))
        {
          if (_serialDebugging)
            Serial.printf("Unauthenticated Update\n");

          return;
        }

        // Debugging message for upload start
        if (_serialDebugging) 
        {
          Serial.setDebugOutput(true);
          Serial.printf("Update: %s\n", upload.filename.c_str());
        }

        // Starting update
        bool error = Update.begin(UPDATE_SIZE_UNKNOWN);
        if (_serialDebugging && error)
          Update.printError(Serial);
      }
      else if (upload.status == UPLOAD_FILE_WRITE) 
      {
        if (Update.write(upload.buf, upload.currentSize) != upload.currentSize && _serialDebugging) 
          Update.printError(Serial);
      }
      else if (upload.status == UPLOAD_FILE_END) 
      {
        if (Update.end(true) && _serialDebugging)
          Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);
        else if(_serialDebugging)
          Update.printError(Serial);

        if(_serialDebugging)
          Serial.setDebugOutput(false);
      }
      else if(_serialDebugging)
        Serial.printf("Update Failed Unexpectedly (likely broken connection): status=%d\n", upload.status);
    });

    _server->begin();
  }
};

#endif

main.cpp

#include <Arduino.h>
#include <WebServer.h>
#include "ESP32HTTPUpdateServer.h"
#include <WiFi.h>
#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>

#define R1_PIN 4
#define G1_PIN 5
#define B1_PIN 6
#define R2_PIN 7
#define G2_PIN 15
#define B2_PIN 16
#define A_PIN  18
#define B_PIN  8
#define C_PIN  3
#define D_PIN  42
#define E_PIN  39
#define LAT_PIN 40
#define OE_PIN  2
#define CLK_PIN 41

HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};

const int panelResX = 64;      // Number of pixels wide of each INDIVIDUAL panel module. 
const int panelResY = 64;     // Number of pixels tall of each INDIVIDUAL panel module.
// My LED Matrix's actual height is 32px however the scan rate is 1/32 so I set this value to 64 instead 32.
const int panel_chain = 1;      // Total number of panels chained one to another
MatrixPanel_I2S_DMA *dma_display = nullptr;

WebServer* _httpServer;
ESP32HTTPUpdateServer* _httpUpdater;
TaskHandle_t DisplayTask;

void displaySetup() {
  HUB75_I2S_CFG mxconfig(
    panelResX,   // module width
    panelResY,   // module height
    panel_chain,    // Chain length
    _pins
  );
  mxconfig.clkphase = false;
  mxconfig.driver = HUB75_I2S_CFG::FM6124;

  dma_display = new MatrixPanel_I2S_DMA(mxconfig);
  dma_display->begin();
}


void displayLoop(void *param) {
  Serial.print("tick");
  while (true) {
    dma_display->setBrightness8(20);
    dma_display->fillScreen(dma_display->color565(0, 0, 0));
    dma_display->setFont();
    dma_display->setCursor(0, 0);
    dma_display->print("test");
    Serial.print(".");
    vTaskDelay(1);
  }
}

void setup() {
  displaySetup();

  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  Serial.println("Wifi will begin");
  WiFi.begin(
    "SomeWifiSSID",
    "SomeWifiPassword"
  );
  _httpServer = new WebServer(80);
  _httpUpdater = new ESP32HTTPUpdateServer();
  while (!WiFi.isConnected()) {
    Serial.println("detect wifi");
    delay(1000);
  }
  _httpUpdater->setup(_httpServer, "/", "test", "test");
  _httpServer->begin();

  xTaskCreatePinnedToCore(
    displayLoop,       // 태스크 함수
    "DisplayTask",     // 테스크 이름
    10000,             // 스택 크기(워드단위)
    NULL,              // 태스크 파라미터
    1,                 // 태스크 우선순위
    &DisplayTask,      // 태스크 핸들
  0);                // 실행될 코어
}

void loop() {
  if (WiFi.isConnected()) {
    // Serial.println(WiFi.localIP());
    _httpServer->handleClient();
  }
  delay(100);
}

What is the problem and How can I solve this?

The text was updated successfully, but these errors were encountered:

sintrb · 2025-04-27T06:01:49Z

You can change i2sspeed the to try. I found that this parameter will affect WiFi.

mxconfig.i2sspeed = HUB75_I2S_CFG::clk_speed::HZ_16M;

srinn · 2025-04-27T08:34:33Z

You can change i2sspeed the to try. I found that this parameter will affect WiFi.
mxconfig.i2sspeed = HUB75_I2S_CFG::clk_speed::HZ_16M;

Thank you for your reply, however it was not effective.
I think it crashes when massive psram/flash memory access.

mrcodetastic · 2025-04-29T17:47:32Z

Interesting. I'll try have a look and see if I can replicate.

srinn · 2025-05-02T01:19:58Z

Interesting. I'll try have a look and see if I can replicate.

I figured it out what is the problem.
As far as I know, Cache_WriteBack_Addr() cannot avoid DMA cache corruption.
It can avoid screen crash to use esp_cache_msync() API from ESP-IDF framework, with flags "ESP_CACHE_MSYNC_FLAG_DIR_C2M", "ESP_CACHE_MSYNC_FLAG_TYPE_DATA", "ESP_CACHE_MSYNC_FLAG_UNALIGNED".

I'm not an expert for esp32, ESP-IDF, and DMA.. so I can't explain it well. I recommend you to see this thread:
https://esp32.com/viewtopic.php?t=24459&start=130#p144126

so I modified it and now working charm!
master...srinn:ESP32-HUB75-MatrixPanel-DMA:master

However, this change ONLY works under the ESP-IDF framework because it requires the use of the esp_cache_msync() API. so I'm hesitant to pull request this change.

mrcodetastic · 2025-05-02T18:14:19Z

Can you create a pull request with code that detects if the library is being compiled using the esp32-arduino framework or not? And includes this work around if no Arduino.

They would be greatly appreciated.

Jason2866 · 2025-05-02T18:30:52Z

However, this change ONLY works under the ESP-IDF framework because it requires the use of the esp_cache_msync() API. so I'm hesitant to pull request this change.

Why? Just call it from Arduino.

srinn · 2025-05-02T22:49:01Z

However, this change ONLY works under the ESP-IDF framework because it requires the use of the esp_cache_msync() API. so I'm hesitant to pull request this change.

Why? Just call it from Arduino.

I don't know why it cannot import this API from arduino framework.

srinn · 2025-05-03T01:10:00Z

However, this change ONLY works under the ESP-IDF framework because it requires the use of the esp_cache_msync() API. so I'm hesitant to pull request this change.

Why? Just call it from Arduino.

Can you create a pull request with code that detects if the library is being compiled using the esp32-arduino framework or not? And includes this work around if no Arduino.

They would be greatly appreciated.

Sorry, Forget about it. I just forget to include esp_cache.h.

srinn · 2025-05-03T02:55:03Z

When I tried to use under ESP-IDF it works okay but after change to arduino framework, the screen crashes.
It is related this problem: #779

so I temporally changed 226th line of gdma_lcd_parallel16.cpp
from

#ifdef SPIRAM_DMA_BUFFER

to

#ifdef SPIRAM_FRAMEBUFFER

srinn · 2025-05-03T03:13:30Z

I think I misunderstood this problem has been solved. my screen still crashing in arduino framework when I tried to update.
I'll figure it out what differences between my two workspaces based on arduino framework and esp-idf framework

EDIT: I set the target_compile_option() in CMakeLists.txt on my ESP-IDF framework workspace like this:

target_compile_options(${COMPONENT_LIB} PRIVATE -DSPIRAM_FRAMEBUFFER -DMATRIX_ONE_SCAN -DBOARD_HAS_PSRAM)

but SPIRAM_FRAMEBUFFER doesn't seems to work. even MATRIX_ONE_SCAN (I added it in my forked code) is working. it's strange, anyway in ESP-IDF framework test application was always using internal sram, not the psram.

So.. my code is definitely not effective anything to this problem.

mrcodetastic · 2025-05-04T00:58:06Z

See if using -DSPIRAM_DMA_BUFFER solves you issue.

srinn · 2025-05-05T02:52:29Z

See if using -DSPIRAM_DMA_BUFFER solves you issue.

Okay, don't mind about using ESP-IDF framework, I will focusing to solve this problem now..
and now I figured it out I can recover when the screen is not working, to set:

LCD_CAM.lcd_user.lcd_start = 1;

When screen is gone.
During update, the screen is keep breaking.
and when I set this value to 1, the screen is back to normal in a very short period.
after the short period, the screen breaks again while OTA updating.

my pseudo code:

void displayLoop() {
  if (LCD_CAM.lcd_user.lcd_start != 1) {
    LCD_CAM.lcd_user.lcd_start = 1;
  }
  dma_display->setBrightness8(clockDim);
  // some display things...
}
void updateLoop() {
  // some OTA loop...
}

https://www.youtube.com/watch?v=Ko0QhLQT7tY

I don't know what makes it set to 0.
I'll figure it out about this.

mrcodetastic · 2025-05-05T22:35:44Z

That's bizarre, potentially worth reporting to the esp-idf repository.

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The screen seems to break when I call Update.write() #786

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The screen seems to break when I call Update.write() #786

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