4.4 Debugging avec vTaskList et stack high-water mark

Activer dans idf.py menuconfig :

Component config → FreeRTOS → Enable FreeRTOS trace facility: YES
Component config → FreeRTOS → Enable statistics formatting functions: YES

void task_debug_monitor(void *pv)
{
    char     stats_buf[512];
    uint32_t cycle = 0;

    while (1) {
        cycle++;
        vTaskList(stats_buf);
        ESP_LOGI("DEBUG", "[Cycle %" PRIu32 "] Task states:\n"
                 "Name            State  Prio  Stack  Num\n%s",
                 cycle, stats_buf);

        // Stack high-water mark pour les tâches connues
        ESP_LOGI("DEBUG", "Sensor stack HWM: %" PRIu32 " words",
                 (uint32_t)uxTaskGetStackHighWaterMark(NULL));  // propre tâche

        vTaskDelay(pdMS_TO_TICKS(10000));
    }
    vTaskDelete(NULL);
}

Lecture de la sortie vTaskList :

Name            State  Prio  Stack  Num
sensor          R      5     1823   3     <- Running, 1823 words restants
display         B      3     2011   4     <- Blocked (attend queue)
wifi_reporter   B      1     1456   5     <- Blocked (attend notification)
Tmr Svc         B      1     1234   2     <- Timer daemon
IDLE0           R      0     748    0
IDLE1           R      0     751    1

Seuil d'alerte : si Stack HWM < 200 words, augmenter usStackDepth de 1024.