Watchdog triggered Task

[rebel88]

Hello,
I have a strange error when running 2 tasks in my design, the Watchdog get triggered after 5 seconds from the starting run of the CPU,[in my configuration file the parameter Task Watchdog timeout period(seconds) is set to 5.], with:

E (5662) task_wdt: Task watchdog got triggered. The following tasks/users did not reset the watchdog in time:
E (5662) task_wdt: - IDLE (CPU 1)
E (5662) task_wdt: Tasks currently running:
E (5662) task_wdt: CPU 0: IDLE
E (5662) task_wdt: CPU 1: lvgl_change_scr
E (5662) task_wdt: Print CPU 1 backtrace

My code is :

• - Main function
  - display init
  - time task
  - change screen task

Time task has a 10ms delay

Code: Select all

 vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(10) );

and change screen task has a 1000ms delay

Code: Select all

vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(1000) );

this is my code:

Code: Select all

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_timer.h"
#include "esp_heap_task_info.h"
#include "display/display.h"
#include "display/gc9a01.h"
#include "display/ui_helpers.h"

/* PRIVATE STRUCTRES ---------------------------------------------------------*/
#define MAX_TASK_NUM 20                         // Max number of per tasks info that it can store
#define MAX_BLOCK_NUM 20                        // Max number of per block info that it can store


/* VARIABLES -----------------------------------------------------------------*/
static const char *TAG = "main";
/* DEFINITIONS ---------------------------------------------------------------*/

/* MACROS --------------------------------------------------------------------*/

/* PRIVATE FUNCTIONS DECLARATION ---------------------------------------------*/
static void lvgl_time_task(void*param);
static void lvgl_change_scr_task(void* param);
/* FUNCTION PROTOTYPES -------------------------------------------------------*/

void app_main(void)
{

	ESP_LOGI(TAG, "Start Main");

	gc9a01_displayInit();
	displayConfig();   

 	xTaskCreatePinnedToCore(lvgl_time_task, "lvgl_time_task", 2048*5, NULL, 3, NULL, 1);
 	xTaskCreatePinnedToCore(lvgl_change_scr_task, "lvgl_change_screen", 2048*5, NULL, 4, NULL, 1);

}


/**
 * @brief 	LVGL library timer task. Necessary to run once every 10ms
 *
 */
void lvgl_time_task(void* param)
{
	ESP_LOGI(TAG, "TIME Task");
	TickType_t xLastWakeTime = xTaskGetTickCount();

	while(1)
	{
        // The task running lv_timer_handler should have lower priority than that running `lv_tick_inc`
        lv_timer_handler();
        vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(10) );
	}
}


/**
 * @brief 	my task to test the screen called once every 1000ms
 *
 */
void lvgl_change_scr_task(void* param)
{
	
	TickType_t xLastWakeTime = xTaskGetTickCount();
	static uint16_t counter=0;
	
	while(1)
	{
		
		vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(1000) );
		//ESP_LOGI(TAG, "Chart Task %d ", counter);

		//--- check screen on display

		if(lv_scr_act() == ui_Screen2)
			ESP_LOGI(TAG, "Chart Task Screen 2 on display");
		if(lv_scr_act() == ui_Screen1)
			ESP_LOGI(TAG, "Chart Task Screen 1 on display");
		if(lv_scr_act() == ui_Screen3)
			ESP_LOGI(TAG, "Chart Task Screen 3 on display");
		if(lv_scr_act() == ui_Screen4)
			ESP_LOGI(TAG, "Chart Task Screen 4 on display");

		//execute action when counter is equal to a specific number
		if(counter == 6)
		{
			_ui_screen_change(&ui_Screen1, LV_SCR_LOAD_ANIM_NONE, 500, 0, &ui_Screen1_screen_init);
			ESP_LOGI(TAG, "Chart Task Called screen_change function to SCREEN 1");
			
		}
		
		if(counter == 12)
		{
			_ui_screen_change(&ui_Screen4, LV_SCR_LOAD_ANIM_NONE, 500, 0, &ui_Screen4_screen_init);
			ESP_LOGI(TAG, "Chart Task Called screen_change function to SCREEN 4");
		}
	 
	

		if(counter == 18)
			{
				_ui_screen_change(&ui_Screen3, LV_SCR_LOAD_ANIM_NONE, 500, 0, &ui_Screen3_screen_init);
				ESP_LOGI(TAG, "Chart Task Called screen_change function to SCREEN 3");
			}
		
		counter++;		
	}
}

the error is:

PS C:\ESP_IDF\40_MySensor_LVGL> set IDF_PATH=C:\Users\Admin\esp\esp-idf
PS C:\ESP_IDF\40_MySensor_LVGL> C:\Users\Admin\.espressif\python_env\idf5.0_py3.11_env\Scripts\python.exe C:\Users\Admin\esp\esp-idf\tools\idf_monitor.py -p COM3 -b 115200 --toolchain-prefix xtensa-esp32-elf- --target esp32 c:\ESP_IDF\40_MySensor_LVGL\build\40_MySensor_LVGL.elf
--- WARNING: GDB cannot open serial ports accessed as COMx
--- Using \\.\COM3 instead...
--- idf_monitor on \\.\COM3 115200 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_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:2
load:0x3fff0030,len:6984
load:0x40078000,len:15512
load:0x40080400,len:3864
0x40080400: _init at ??:?

entry 0x40080650
I (26) boot: ESP-IDF v5.0.3 2nd stage bootloader
I (27) boot: compile time 15:56:53
I (27) boot: Multicore bootloader
I (30) boot: chip revision: v1.0
I (33) boot.esp32: SPI Speed : 40MHz
I (38) boot.esp32: SPI Mode : DIO
I (43) boot.esp32: SPI Flash Size : 4MB
I (47) boot: Enabling RNG early entropy source...
I (53) boot: Partition Table:
I (56) boot: ## Label Usage Type ST Offset Length
I (63) boot: 0 nvs WiFi data 01 02 00009000 00004000
I (71) boot: 1 otadata OTA data 01 00 0000d000 00002000
I (78) boot: 2 phy_init RF data 01 01 0000f000 00001000
I (86) boot: 3 factory factory app 00 00 00010000 00200000
I (93) boot: End of partition table
I (98) boot: Defaulting to factory image
I (102) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=1a67ch (108156) map
I (150) esp_image: segment 1: paddr=0002a6a4 vaddr=3ffb0000 size=020ach ( 8364) load
I (153) esp_image: segment 2: paddr=0002c758 vaddr=40080000 size=038c0h ( 14528) load
I (162) esp_image: segment 3: paddr=00030020 vaddr=400d0020 size=4825ch (295516) map
I (271) esp_image: segment 4: paddr=00078284 vaddr=400838c0 size=0a6c4h ( 42692) load
I (296) boot: Loaded app from partition at offset 0x10000
I (296) boot: Disabling RNG early entropy source...
I (307) cpu_start: Multicore app
I (307) cpu_start: Pro cpu up.
I (307) cpu_start: Starting app cpu, entry point is 0x40081264
0x40081264: call_start_cpu1 at C:/Users/Admin/esp/esp-idf/components/esp_system/port/cpu_start.c:143

I (0) cpu_start: App cpu up.
I (328) cpu_start: Pro cpu start user code
I (328) cpu_start: cpu freq: 160000000 Hz
I (328) cpu_start: Application information:
I (332) cpu_start: Project name: 40_MySensor_LVGL
I (338) cpu_start: App version: 1
I (343) cpu_start: Compile time: Aug 28 2023 18:32:32
I (349) cpu_start: ELF file SHA256: f52e61426bea9df4...
I (355) cpu_start: ESP-IDF: v5.0.3
I (360) cpu_start: Min chip rev: v0.0
I (364) cpu_start: Max chip rev: v3.99
I (369) cpu_start: Chip rev: v1.0
I (374) heap_init: Initializing. RAM available for dynamic allocation:
I (381) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (387) heap_init: At 3FFBAF48 len 000250B8 (148 KiB): DRAM
I (393) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (400) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (406) heap_init: At 4008DF84 len 0001207C (72 KiB): IRAM
I (414) spi_flash: detected chip: generic
I (417) spi_flash: flash io: dio
I (422) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (432) main: Start Main
I (432) display: Turn off LCD backlight
I (442) gpio: GPIO[18]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (452) display: Initialize SPI bus
I (452) display: Install panel IO
I (462) gpio: GPIO[21]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (462) display: Install GC9A01 panel driver
I (472) gpio: GPIO[22]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (602) display: Turn on LCD backlight
I (602) display: Initialize LVGL library
I (602) display: Register display driver to LVGL
I (612) display: Install LVGL tick timer
I (612) display: Display LVGL MySensor Widget
I (662) main: TIME Task
I (1662) main: Chart Task Screen 2 on display
I (2662) main: Chart Task Screen 2 on display
I (3662) main: Chart Task Screen 2 on display
I (4662) main: Chart Task Screen 2 on display
E (5662) task_wdt: Task watchdog got triggered. The following tasks/users did not reset the watchdog in time:
E (5662) task_wdt: - IDLE (CPU 1)
E (5662) task_wdt: Tasks currently running:
E (5662) task_wdt: CPU 0: IDLE
E (5662) task_wdt: CPU 1: lvgl_change_scr
E (5662) task_wdt: Print CPU 1 backtrace


Backtrace: 0x40085A0A:0x3FFB1430 0x40082F95:0x3FFB1450 0x400D5FB1:0x3FFCA6C0 0x400D678B:0x3FFCA6F0 0x400D564B:0x3FFCA710 0x400D5216:0x3FFCA730 0x4000BD83:0x3FFCA750 0x4000117D:0x3FFCA770 0x400592FE:0x3FFCA790 0x4005937A:0x3FFCA7B0 0x40107B43:0x3FFCA7D0 0x4011340B:0x3FFCA800 0x4010EE32:0x3FFCA820 0x4010EFAD:0x3FFCAB30 0x40118261:0x3FFCAB60 0x4008C885:0x3FFCAB90 0x400D6801:0x3FFCABE0 0x40089A79:0x3FFCAC10
0x40085a0a: esp_crosscore_isr at C:/Users/Admin/esp/esp-idf/components/esp_system/crosscore_int.c:96

0x40082f95: _xt_lowint1 at C:/Users/Admin/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S:1118

0x400d5fb1: uart_tx_char at C:/Users/Admin/esp/esp-idf/components/vfs/vfs_uart.c:154

0x400d678b: uart_write at C:/Users/Admin/esp/esp-idf/components/vfs/vfs_uart.c:209

0x400d564b: console_write at C:/Users/Admin/esp/esp-idf/components/vfs/vfs_console.c:73

0x400d5216: esp_vfs_write at C:/Users/Admin/esp/esp-idf/components/vfs/vfs.c:436 (discriminator 4)

0x40107b43: __sfvwrite_r at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/stdio/fvwrite.c:251

0x4011340b: __sprint_r at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/stdio/vfprintf.c:429
(inlined by) __sprint_r at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/stdio/vfprintf.c:399

0x4010ee32: _vfprintf_r at ??:?

0x4010efad: vprintf at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/stdio/vprintf.c:34 (discriminator 5)

0x40118261: esp_log_writev at C:/Users/Admin/esp/esp-idf/components/log/log.c:200

0x4008c885: esp_log_write at C:/Users/Admin/esp/esp-idf/components/log/log.c:210

0x400d6801: lvgl_change_scr_task at C:/ESP_IDF/40_MySensor_LVGL/main/main.c:76 (discriminator 13)

0x40089a79: vPortTaskWrapper at C:/Users/Admin/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c:154

BUT if i change the first if condition in the lvgl_change_scr_task task waiting only 3 seconds to execute the first action
in this way:

Code: Select all

...
if(counter == 3)
		{
			_ui_screen_change(&ui_Screen1, LV_SCR_LOAD_ANIM_NONE, 500, 0, &ui_Screen1_screen_init);
			//lv_obj_clean(ui_Screen2);
			//lv_disp_load_scr(ui_Screen1);
			ESP_LOGI(TAG, "Chart Task Called screen_change function to SCREEN 1");
			
		}
		...

everything works correctly.

Why my task get stuck when running the lvgl_change_scr_task code?
could you please give me some advice to avoid this error?
thanks

[rebel88]

No updates on this topic?

[ESP_Sprite]

Not a clue what's going on here. Is there something somewhere else in your code that happens after four seconds? Potentially that subtly corrupts memory and causes the log line to loop forever?

[rebel88]

Hi ESP_Sprite,
thanks for your reply.
Sadly I have no other actions after 4 seconds.
I'm trying to test LVGL library using a simple task to change screen instead of using buttons.
I'm using following functions:
- gc9a01_displayInit : simple initialization display function for gc9a01 chip based display that includes SPI drivers, gpio, functions to attach lcd panel to SPI
- display_config: a function used to allocate lcd buffers, register lcd drivers for LVGL libraries, call esp_timer_create_args_t function to install a 2ms tick update, call function to initialize LVGL display.

after I have 2 tasks:
- lvgl_time_task: called every 10ms to inform lvgl that are elapsed 10ms from the previous call
- lvgl_change_scr_task : called every 1000ms to schedule the update of the screen with the function

Code: Select all

vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(1000) );

this is the line code called when default screen is displayed

Code: Select all

if(lv_scr_act() == ui_Screen2)
ESP_LOGI(TAG, "Chart Task Screen 2 on display");

the function lv_scr_act()is provided by the LVGL library :

Code: Select all

static inline lv_obj_t * lv_scr_act(void)
{
    return lv_disp_get_scr_act(lv_disp_get_default());
}

where

Code: Select all

lv_obj_t * lv_disp_get_scr_act(lv_disp_t * disp)
{
    if(!disp) disp = lv_disp_get_default();
    if(!disp) {
        LV_LOG_WARN("no display registered to get its active screen");
        return NULL;
    }

    return disp->act_scr;
}

Any clue?

[joy586210]

suggest set bigger lv memory size to have a try:

Code: Select all

(Top) → Component config → LVGL configuration → Memory settings
                                                                          Espressif IoT Development Framework Configuration
[ ] If true use custom malloc/free, otherwise use the built-in `lv_mem_alloc()` and `lv_mem_free()`
(64) Size of the memory used by `lv_mem_alloc` in kilobytes (>= 2kB)
(0x0) Address for the memory pool instead of allocating it as a normal array
(16) Number of the memory buffer
[ ] Use the standard memcpy and memset instead of LVGL's own functions

I just increased it from 32 to 64 to solve similar issue.