dmd32 lib use with espNow crash

[microElabDevelop]

hi, im using dmd32 lib with esp now ,, but simple program rebooting again and again, `#include

include

include //

include "fonts/SystemFont5x7.h"

include "fonts/Arial_black_16.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;

////////////// typedef struct struct_message{ uint8_t a; uint8_t b;

}struct_message; // Create a structured object struct_message myData;

void OnDataRecv(const uint8_t mac, const uint8_t incomingData, int len); /-------------------------------------------------------------------------------------- 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(); } void setup(void){ Serial.begin(115200); Serial.println("receive");

// 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) /////////////// // Set ESP32 as a Wi-Fi Station WiFi.mode(WIFI_STA); // Initilize ESP-NOW if (esp_now_init() != ESP_OK) { Serial.println("Error initializing ESP-NOW"); return; } // Print MAC Address to Serial monitor

Serial.print("Responder "); Serial.print("MAC Address: "); Serial.println(WiFi.macAddress());

// Register callback function esp_now_register_recv_cb(OnDataRecv); }

/-------------------------------------------------------------------------------------- loop Arduino architecture main loop --------------------------------------------------------------------------------------/ unsigned int count; char buf[]="1234"; void loop(void){

byte b;
// 10 x 14 font clock, including demo of OR and NOR modes for pixels so that the flashing colon can be overlayed dmd.clearScreen( true ); dmd.selectFont(Arial_Black_16); snprintf(buf, sizeof(buf), "%d",count); dmd.drawString( 3,1,buf,strlen(buf), GRAPHICS_NORMAL );

delay(500); count++; }

// Callback function executed when data is received void OnDataRecv(const uint8_t mac, const uint8_t incomingData, int len) { memcpy(&myData, incomingData, sizeof(myData)); Serial.print("Data received: "); Serial.println(len); Serial.print("Character Value: "); Serial.println(myData.a); Serial.print("Integer Value: "); Serial.println(myData.b); }`

[Ashutoshkarve007]

Check, add a delay after or before hardware timer configuration.