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Guru Meditation Error: Core 1 panic'ed (Cache disabled but cached memory region accessed).

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#include <WiFi.h>
#include <Adafruit_GFX.h>
#include <RGBmatrixPanel.h>

#define A    12
#define B    16
#define C    17
#define D    18
#define CLK  15 
#define LAT  32 
#define OE   33

#define Sound 14 

RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false, 64);

const char* ssid = "SSID";
const char* password = "PASSWORD";

void setup() 
{
  Serial.begin(115200);
  Serial.println("Starting Screen");
  Serial.println("");
  
  pinMode(Sound, OUTPUT);
 
 //beep on start 
  tone(Sound, 5000, 400);
  vTaskDelay(1000/portTICK_PERIOD_MS);
  noTone(Sound);

  Serial.println("Starting WiFi STA");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  
  Serial.println("Starting Matrix");
  matrix.begin();                           // setup the LED matrix
  matrix.setTextWrap(false); // Don't wrap at end of line - will do ourselves
  matrix.fillScreen(0);
}

void loop() 
{
  vTaskDelay(1000/portTICK_PERIOD_MS);
}

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ELF file SHA256: 0000000000000000

Rebooting...
ets Jun  8 2016 00:22:57

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1344
load:0x40078000,len:13864
load:0x40080400,len:3608
entry 0x400805f0
[     4][D][esp32-hal-cpu.c:244] setCpuFrequencyMhz(): PLL: 480 / 2 = 240 Mhz, APB: 80000000 Hz
Starting Screen

[    32][D][Tone.cpp:124] tone(): _pin=14, frequency=5000 Hz, duration=400 ms
[    32][V][Tone.cpp:62] tone_init(): Creating tone queue
[    34][V][Tone.cpp:68] tone_init(): Tone queue created
[    39][V][Tone.cpp:72] tone_init(): Creating tone task
[    44][V][Tone.cpp:85] tone_init(): Tone task created
[    49][D][Tone.cpp:31] tone_task(): Task received from queue TONE_START: _pin=14, frequency=5000 Hz, duration=400 ms
[    59][D][Tone.cpp:33] tone_task(): Setup LED controll on channel 0
[  1049][D][Tone.cpp:105] noTone(): noTone was called
Starting WiFi STA
[  1049][D][Tone.cpp:45] tone_task(): Task received from queue TONE_END: pin=14
[  1066][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
[  1152][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[  1154][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[  1154][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
Starting Matrix
[  3579][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: SSID, BSSID: 00:00:00:00:00:00, Reason: 201
[  3580][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  3587][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND
[  3593][D][WiFiGeneric.cpp:966] _eventCallback(): WiFi Reconnect Running
Guru Meditation Error: Core  1 panic'ed (Cache disabled but cached memory region accessed). 

Core  1 register dump:
PC      : 0x400d5c58  PS      : 0x00060035  A0      : 0x8008199d  A1      : 0x3ffbf21c  
A2      : 0x00000000  A3      : 0x0036f318  A4      : 0x8008f3a0  A5      : 0x3ffb7e50  
A6      : 0x00000003  A7      : 0x00060323  A8      : 0x800d5c58  A9      : 0x3ffbf1fc  
A10     : 0x0036f30f  A11     : 0x00000000  A12     : 0x0036f30e  A13     : 0x80000000  
A14     : 0x007bf298  A15     : 0x003fffff  SAR     : 0x00000020  EXCCAUSE: 0x00000007  
EXCVADDR: 0x00000000  LBEG    : 0x400852d5  LEND    : 0x400852dd  LCOUNT  : 0x00000027  


Backtrace:0x400d5c55:0x3ffbf21c |<-CORRUPTED

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#if defined(ARDUINO_ARCH_ESP32)
  timer_config_t tim_config;
  tim_config.divider = 2; // Run Timer at 40 MHz
  tim_config.counter_dir = TIMER_COUNT_UP;
  tim_config.counter_en = TIMER_PAUSE;
  tim_config.alarm_en = TIMER_ALARM_EN;
  tim_config.auto_reload = TIMER_AUTORELOAD_EN;
  tim_config.intr_type = TIMER_INTR_LEVEL;

  timer_init(TIMER_GROUP_1, TIMER_0, &tim_config);
  /* Timer's counter will initially start from value below.
       Also, if auto_reload is set, this value will be automatically reload on
     alarm */
  timer_set_counter_value(TIMER_GROUP_1, TIMER_0, 0x00000000ULL);
  /* Configure the alarm value and the interrupt on alarm. */
  timer_set_alarm_value(TIMER_GROUP_1, TIMER_0, 10000);
  timer_enable_intr(TIMER_GROUP_1, TIMER_0);
  timer_isr_register(TIMER_GROUP_1, TIMER_0, IRQ_HANDLER, (void *)TIMER_0,
                     ESP_INTR_FLAG_IRAM, NULL);

  //timer_start(TIMER_GROUP_1, TIMER_0);