esp_watchdog.hpp

#pragma once
 
#include <cstdint>
 
#include "esp_def.hpp"
#include "hal/wdt_hal.h"
#include "soc/soc_caps.h"
#include "watchdog.hpp"
 
namespace LibXR
{
 
#if CONFIG_ESP_TASK_WDT_EN && !CONFIG_ESP_TASK_WDT_USE_ESP_TIMER
#define LIBXR_ESP_WDT_MWDT0_RESERVED 1
#else
#define LIBXR_ESP_WDT_MWDT0_RESERVED 0
#endif
 
#if SOC_TIMER_GROUPS >= 2
#if CONFIG_ESP_INT_WDT
#define LIBXR_ESP_WDT_MWDT1_RESERVED 1
#else
#define LIBXR_ESP_WDT_MWDT1_RESERVED 0
#endif
#else
#define LIBXR_ESP_WDT_MWDT1_RESERVED 1
#endif
 
#if (LIBXR_ESP_WDT_MWDT1_RESERVED == 0)
constexpr wdt_inst_t ESP32_WATCHDOG_DEFAULT_INSTANCE = WDT_MWDT1;
#elif (LIBXR_ESP_WDT_MWDT0_RESERVED == 0)
constexpr wdt_inst_t ESP32_WATCHDOG_DEFAULT_INSTANCE = WDT_MWDT0;
#else
constexpr wdt_inst_t ESP32_WATCHDOG_DEFAULT_INSTANCE = WDT_RWDT;
#endif
 
static_assert(!(ESP32_WATCHDOG_DEFAULT_INSTANCE == WDT_MWDT0 &&
                LIBXR_ESP_WDT_MWDT0_RESERVED),
              "LibXR ESP32Watchdog selected MWDT0, but MWDT0 is reserved by ESP-IDF.");
static_assert(!(ESP32_WATCHDOG_DEFAULT_INSTANCE == WDT_MWDT1 &&
                LIBXR_ESP_WDT_MWDT1_RESERVED),
              "LibXR ESP32Watchdog selected MWDT1, but MWDT1 is reserved by ESP-IDF.");
 
class ESP32Watchdog : public Watchdog
{
 public:
  explicit ESP32Watchdog(uint32_t timeout_ms = 1000, uint32_t feed_ms = 250);
 
  ErrorCode SetConfig(const Configuration& config) override;
  ErrorCode Feed() override;
  ErrorCode Start() override;
  ErrorCode Stop() override;
 
 private:
  static bool IsInstanceSupported(wdt_inst_t instance);
  ErrorCode InitializeHardware();
  ErrorCode ApplyConfiguration();
 
  wdt_hal_context_t hal_{};
  const wdt_inst_t instance_ = ESP32_WATCHDOG_DEFAULT_INSTANCE;
  bool initialized_ = false;
  bool started_ = false;
};
 
}  // namespace LibXR
 
#undef LIBXR_ESP_WDT_MWDT0_RESERVED
#undef LIBXR_ESP_WDT_MWDT1_RESERVED