On m5stack atom s3 watchdog is rebooting, but on m5stack atom watchdog is halting.

[jensolsson]

Board

M5Stack ATOM / M5Stack ATOM S3

Device Description

m5stack atom
m5stack atom s3

Hardware Configuration

none

Version

v3.0.5

Type

Question

IDE Name

Arduino IDE

Operating System

macOS

Flash frequency

40Mhz

PSRAM enabled

yes

Upload speed

115200

Description

I try to support both and it is very important for me that the watchdog reboots the system if it is not fed. Is there any way to make it do so on Arduino for the non-s3 version of m5stack atom?

Sketch

-

Debug Message

This is what I get on the non-s3 version

E (39856) task_wdt: Task watchdog got triggered. The following tasks/users did not reset the watchdog in time:
E (39857) task_wdt:  - loopTask (CPU 1)
E (39859) task_wdt: Tasks currently running:
E (39862) task_wdt: CPU 0: IDLE0
E (39865) task_wdt: CPU 1: IDLE1
E (39868) task_wdt: Aborting.
E (39871) task_wdt: Print CPU 1 (current core) backtrace




Backtrace: 0x400948b7:0x3ffbcb90 0x400fbcc5:0x3ffbcbb0 0x40097047:0x3ffbcbd0 0x40098aae:0x3ffbcbf0




ELF file SHA256: d633cc5fcf9e9481

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[lbernstone]

Figure out what is blocking the cpu and stop it from blocking. Typically this means adding delay/yield into your loops, so the the system has time to execute things while your code is blocked.

[SuGlider]

@jensolsson - It is interesting that the S3 reboots with WDT but the ESP32 doesn't. Both have the same Arduino WDT configuration in sdkconfig, therefore both should behave in the same way.

CONFIG_ESP_TASK_WDT_INIT=y
CONFIG_ESP_TASK_WDT_PANIC=y
CONFIG_ESP_TASK_WDT_TIMEOUT_S=5
CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0=y
# CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1 is not set

I have tested WDT with ESP32 and ESP32-S3 dev module boards (using the Espressif board selection from menu).
Both won't trigger WDT by default because the Arduino Core is running in Core 1, which won't check the WDT Task starvation event.

If I select Arduino Run On: "Core 0", both will trigger WDT Task panic.

I try to support both and it is very important for me that the watchdog reboots the system if it is not fed. Is there any way to make it do so on Arduino for the non-s3 version of m5stack atom?

Select Arduino Run On: "Core 0" in the Arduino IDE Menu in order to force loop() task to be executed by Core 0, which has Task WDT enabled. It will trigger a panic reset after 5 seconds if the WDT Task is not fed.

[SuGlider]

In order to change the WDT Task setttings of the task that is runing loop() task, it is possible to deinit WDT and init again with a different setting using code:

#include "esp_task_wdt.h"

//3 seconds WDT in the currect running Core (any IDE Menu selection)
#define WDT_TIMEOUT_MS 3000
#ifdef CONFIG_FREERTOS_UNICORE
#define CONFIG_FREERTOS_NUMBER_OF_CORES 1
#else
#define CONFIG_FREERTOS_NUMBER_OF_CORES 2
#endif

esp_task_wdt_config_t twdt_config = {
        .timeout_ms = WDT_TIMEOUT_MS,
        .idle_core_mask = (1 << CONFIG_FREERTOS_NUMBER_OF_CORES) - 1,    // Bitmask of all cores
        .trigger_panic = true, // enable panic reset if WDT is nor fed
    };

void setup() {
  Serial.begin(115200);
  Serial.println("Configuring WDT... " + String(CONFIG_FREERTOS_NUMBER_OF_CORES) + " cores");
  esp_task_wdt_deinit(); //wdt is enabled by default, so we need to deinit it first
  esp_task_wdt_init(&twdt_config); //enable panic so ESP32 restarts
  esp_task_wdt_add(NULL); //add current thread to WDT watch
}

int i = 0;
int last = millis();
void loop() {
  // resetting WDT every 2s, 5 times only
  if (millis() - last >= 2000 && i < 5) {
      Serial.println("Resetting WDT...");
      esp_task_wdt_reset();
      last = millis();
      i++;
      if (i == 5) {
        Serial.println("Stopping WDT reset. CPU should reboot in 3s");
      }
  }
}