ports/esp32/modmachine.c - lite/micropython - Linaro Git Browser

 /*
  * This file is part of the MicroPython project, http://micropython.org/
  *
  * Development of the code in this file was sponsored by Microbric Pty Ltd
  *
  * The MIT License (MIT)
  *
  * Copyright (c) 2013-2023 Damien P. George
  * Copyright (c) 2016 Paul Sokolovsky
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 // This file is never compiled standalone, it's included directly from
 // extmod/modmachine.c via MICROPY_PY_MACHINE_INCLUDEFILE.

 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_mac.h"
 #include "esp_sleep.h"
 #include "esp_pm.h"

 #include "modmachine.h"
 #include "machine_rtc.h"

 #if MICROPY_HW_ENABLE_SDCARD
 #define MICROPY_PY_MACHINE_SDCARD_ENTRY { MP_ROM_QSTR(MP_QSTR_SDCard), MP_ROM_PTR(&machine_sdcard_type) },
 #else
 #define MICROPY_PY_MACHINE_SDCARD_ENTRY
 #endif

 #if SOC_TOUCH_SENSOR_SUPPORTED
 #define MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY { MP_ROM_QSTR(MP_QSTR_TouchPad), MP_ROM_PTR(&machine_touchpad_type) },
 #else
 #define MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY
 #endif

 #define MICROPY_PY_MACHINE_EXTRA_GLOBALS \
     { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&machine_lightsleep_obj) }, \
     \
     { MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) }, \
     MICROPY_PY_MACHINE_SDCARD_ENTRY \
     { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) }, \
     MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY \
     { MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&machine_rtc_type) }, \
     \
     /* wake abilities */ \
     { MP_ROM_QSTR(MP_QSTR_SLEEP), MP_ROM_INT(MACHINE_WAKE_SLEEP) }, \
     { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) }, \
     \
     /* Reset reasons */ \
     { MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(MP_HARD_RESET) }, \
     { MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(MP_PWRON_RESET) }, \
     { MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(MP_WDT_RESET) }, \
     { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(MP_DEEPSLEEP_RESET) }, \
     { MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(MP_SOFT_RESET) }, \
     \
     /* Wake reasons */ \
     { MP_ROM_QSTR(MP_QSTR_wake_reason), MP_ROM_PTR(&machine_wake_reason_obj) }, \
     { MP_ROM_QSTR(MP_QSTR_PIN_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT0) }, \
     { MP_ROM_QSTR(MP_QSTR_EXT0_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT0) }, \
     { MP_ROM_QSTR(MP_QSTR_EXT1_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT1) }, \
     { MP_ROM_QSTR(MP_QSTR_TIMER_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_TIMER) }, \
     { MP_ROM_QSTR(MP_QSTR_TOUCHPAD_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_TOUCHPAD) }, \
     { MP_ROM_QSTR(MP_QSTR_ULP_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_ULP) }, \

 typedef enum {
     MP_PWRON_RESET = 1,
     MP_HARD_RESET,
     MP_WDT_RESET,
     MP_DEEPSLEEP_RESET,
     MP_SOFT_RESET
 } reset_reason_t;

 static bool is_soft_reset = 0;

 // Note: this is from a private IDF header
 extern int esp_clk_cpu_freq(void);

 static mp_obj_t mp_machine_get_freq(void) {
     return mp_obj_new_int(esp_rom_get_cpu_ticks_per_us() * 1000000);
 }

 static void mp_machine_set_freq(size_t n_args, const mp_obj_t *args) {
     mp_int_t freq = mp_obj_get_int(args[0]) / 1000000;
     #if CONFIG_IDF_TARGET_ESP32C2
     if (freq != 80 && freq != 120) {
         mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 80MHz or 120MHz"));
     }
     #else
     if (freq != 20 && freq != 40 && freq != 80 && freq != 160
         #if !(CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32C6)
         && freq != 240
         #endif
         ) {
         #if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32C6
         mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 20MHz, 40MHz, 80Mhz or 160MHz"));
         #else
         mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 20MHz, 40MHz, 80Mhz, 160MHz or 240MHz"));
         #endif
     }
     #endif
     esp_pm_config_t pm = {
         .max_freq_mhz = freq,
         .min_freq_mhz = freq,
         .light_sleep_enable = false,
     };
     esp_err_t ret = esp_pm_configure(&pm);
     if (ret != ESP_OK) {
         mp_raise_ValueError(NULL);
     }
     while (esp_rom_get_cpu_ticks_per_us() != freq) {
         vTaskDelay(1);
     }
 }

 static void machine_sleep_helper(wake_type_t wake_type, size_t n_args, const mp_obj_t *args) {
     // First, disable any previously set wake-up source
     esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_ALL);

     // Set the expiry time of the sleep, if given.
     if (n_args != 0) {
         mp_int_t expiry = mp_obj_get_int(args[0]);
         esp_sleep_enable_timer_wakeup(((uint64_t)expiry) * 1000);
     }

     #if SOC_PM_SUPPORT_EXT0_WAKEUP
     if (machine_rtc_config.ext0_pin != -1 && (machine_rtc_config.ext0_wake_types & wake_type)) {
         esp_sleep_enable_ext0_wakeup(machine_rtc_config.ext0_pin, machine_rtc_config.ext0_level ? 1 : 0);
     }
     #endif

     #if SOC_PM_SUPPORT_EXT1_WAKEUP
     if (machine_rtc_config.ext1_pins != 0) {
         esp_sleep_enable_ext1_wakeup(
             machine_rtc_config.ext1_pins,
             machine_rtc_config.ext1_level ? ESP_EXT1_WAKEUP_ANY_HIGH : ESP_EXT1_WAKEUP_ALL_LOW);
     }
     #endif

     #if SOC_TOUCH_SENSOR_SUPPORTED
     if (machine_rtc_config.wake_on_touch) {
         if (esp_sleep_enable_touchpad_wakeup() != ESP_OK) {
             mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("esp_sleep_enable_touchpad_wakeup() failed"));
         }
     }
     #endif

     #if SOC_ULP_SUPPORTED
     if (machine_rtc_config.wake_on_ulp) {
         if (esp_sleep_enable_ulp_wakeup() != ESP_OK) {
             mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("esp_sleep_enable_ulp_wakeup() failed"));
         }
     }
     #endif

     switch (wake_type) {
         case MACHINE_WAKE_SLEEP:
             esp_light_sleep_start();
             break;
         case MACHINE_WAKE_DEEPSLEEP:
             esp_deep_sleep_start();
             break;
     }
 }

 static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
     machine_sleep_helper(MACHINE_WAKE_SLEEP, n_args, args);
 };

 MP_NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args) {
     machine_sleep_helper(MACHINE_WAKE_DEEPSLEEP, n_args, args);
     mp_machine_reset();
 };

 static mp_int_t mp_machine_reset_cause(void) {
     if (is_soft_reset) {
         return MP_SOFT_RESET;
     }
     switch (esp_reset_reason()) {
         case ESP_RST_POWERON:
         case ESP_RST_BROWNOUT:
             return MP_PWRON_RESET;

         case ESP_RST_INT_WDT:
         case ESP_RST_TASK_WDT:
         case ESP_RST_WDT:
             return MP_WDT_RESET;

         case ESP_RST_DEEPSLEEP:
             return MP_DEEPSLEEP_RESET;

         case ESP_RST_SW:
         case ESP_RST_PANIC:
         case ESP_RST_EXT: // Comment in ESP-IDF: "For ESP32, ESP_RST_EXT is never returned"
             return MP_HARD_RESET;

         case ESP_RST_SDIO:
         case ESP_RST_UNKNOWN:
         default:
             return 0;
     }
 }

 #if MICROPY_ESP32_USE_BOOTLOADER_RTC
 #include "soc/rtc_cntl_reg.h"
 #include "usb.h"
 #if CONFIG_IDF_TARGET_ESP32S3
 #include "esp32s3/rom/usb/usb_dc.h"
 #include "esp32s3/rom/usb/usb_persist.h"
 #include "esp32s3/rom/usb/chip_usb_dw_wrapper.h"
 #endif

 MP_NORETURN static void machine_bootloader_rtc(void) {
     #if CONFIG_IDF_TARGET_ESP32S3 && MICROPY_HW_USB_CDC
     usb_usj_mode();
     usb_dc_prepare_persist();
     chip_usb_set_persist_flags(USBDC_BOOT_DFU);
     #endif
     REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
     esp_restart();
 }
 #endif

 #ifdef MICROPY_BOARD_ENTER_BOOTLOADER
 MP_NORETURN void mp_machine_bootloader(size_t n_args, const mp_obj_t *args) {
     MICROPY_BOARD_ENTER_BOOTLOADER(n_args, args);
     for (;;) {
     }
 }
 #endif

 void machine_init(void) {
     is_soft_reset = 0;
 }

 void machine_deinit(void) {
     // we are doing a soft-reset so change the reset_cause
     is_soft_reset = 1;
 }

 static mp_obj_t machine_wake_reason(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     return MP_OBJ_NEW_SMALL_INT(esp_sleep_get_wakeup_cause());
 }
 static MP_DEFINE_CONST_FUN_OBJ_KW(machine_wake_reason_obj, 0,  machine_wake_reason);

 MP_NORETURN static void mp_machine_reset(void) {
     esp_restart();
 }

 static mp_obj_t mp_machine_unique_id(void) {
     uint8_t chipid[6];
     esp_efuse_mac_get_default(chipid);
     return mp_obj_new_bytes(chipid, 6);
 }

 static void mp_machine_idle(void) {
     MP_THREAD_GIL_EXIT();
     taskYIELD();
     MP_THREAD_GIL_ENTER();
 }
	/*
	* This file is part of the MicroPython project, http://micropython.org/
	*
	* Development of the code in this file was sponsored by Microbric Pty Ltd
	*
	* The MIT License (MIT)
	*
	* Copyright (c) 2013-2023 Damien P. George
	* Copyright (c) 2016 Paul Sokolovsky
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	// This file is never compiled standalone, it's included directly from
	// extmod/modmachine.c via MICROPY_PY_MACHINE_INCLUDEFILE.

	#include "freertos/FreeRTOS.h"
	#include "freertos/task.h"
	#include "esp_mac.h"
	#include "esp_sleep.h"
	#include "esp_pm.h"

	#include "modmachine.h"
	#include "machine_rtc.h"

	#if MICROPY_HW_ENABLE_SDCARD
	#define MICROPY_PY_MACHINE_SDCARD_ENTRY { MP_ROM_QSTR(MP_QSTR_SDCard), MP_ROM_PTR(&machine_sdcard_type) },
	#else
	#define MICROPY_PY_MACHINE_SDCARD_ENTRY
	#endif

	#if SOC_TOUCH_SENSOR_SUPPORTED
	#define MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY { MP_ROM_QSTR(MP_QSTR_TouchPad), MP_ROM_PTR(&machine_touchpad_type) },
	#else
	#define MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY
	#endif

	#define MICROPY_PY_MACHINE_EXTRA_GLOBALS \
	{ MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&machine_lightsleep_obj) }, \
	\
	{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) }, \
	MICROPY_PY_MACHINE_SDCARD_ENTRY \
	{ MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) }, \
	MICROPY_PY_MACHINE_TOUCH_PAD_ENTRY \
	{ MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&machine_rtc_type) }, \
	\
	/* wake abilities */ \
	{ MP_ROM_QSTR(MP_QSTR_SLEEP), MP_ROM_INT(MACHINE_WAKE_SLEEP) }, \
	{ MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) }, \
	\
	/* Reset reasons */ \
	{ MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(MP_HARD_RESET) }, \
	{ MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(MP_PWRON_RESET) }, \
	{ MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(MP_WDT_RESET) }, \
	{ MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(MP_DEEPSLEEP_RESET) }, \
	{ MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(MP_SOFT_RESET) }, \
	\
	/* Wake reasons */ \
	{ MP_ROM_QSTR(MP_QSTR_wake_reason), MP_ROM_PTR(&machine_wake_reason_obj) }, \
	{ MP_ROM_QSTR(MP_QSTR_PIN_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT0) }, \
	{ MP_ROM_QSTR(MP_QSTR_EXT0_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT0) }, \
	{ MP_ROM_QSTR(MP_QSTR_EXT1_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_EXT1) }, \
	{ MP_ROM_QSTR(MP_QSTR_TIMER_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_TIMER) }, \
	{ MP_ROM_QSTR(MP_QSTR_TOUCHPAD_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_TOUCHPAD) }, \
	{ MP_ROM_QSTR(MP_QSTR_ULP_WAKE), MP_ROM_INT(ESP_SLEEP_WAKEUP_ULP) }, \

	typedef enum {
	MP_PWRON_RESET = 1,
	MP_HARD_RESET,
	MP_WDT_RESET,
	MP_DEEPSLEEP_RESET,
	MP_SOFT_RESET
	} reset_reason_t;

	static bool is_soft_reset = 0;

	// Note: this is from a private IDF header
	extern int esp_clk_cpu_freq(void);

	static mp_obj_t mp_machine_get_freq(void) {
	return mp_obj_new_int(esp_rom_get_cpu_ticks_per_us() * 1000000);
	}

	static void mp_machine_set_freq(size_t n_args, const mp_obj_t *args) {
	mp_int_t freq = mp_obj_get_int(args[0]) / 1000000;
	#if CONFIG_IDF_TARGET_ESP32C2
	if (freq != 80 && freq != 120) {
	mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 80MHz or 120MHz"));
	}
	#else
	if (freq != 20 && freq != 40 && freq != 80 && freq != 160
	#if !(CONFIG_IDF_TARGET_ESP32C3 \|\| CONFIG_IDF_TARGET_ESP32C6)
	&& freq != 240
	#endif
	) {
	#if CONFIG_IDF_TARGET_ESP32C3 \|\| CONFIG_IDF_TARGET_ESP32C6
	mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 20MHz, 40MHz, 80Mhz or 160MHz"));
	#else
	mp_raise_ValueError(MP_ERROR_TEXT("frequency must be 20MHz, 40MHz, 80Mhz, 160MHz or 240MHz"));
	#endif
	}
	#endif
	esp_pm_config_t pm = {
	.max_freq_mhz = freq,
	.min_freq_mhz = freq,
	.light_sleep_enable = false,
	};
	esp_err_t ret = esp_pm_configure(&pm);
	if (ret != ESP_OK) {
	mp_raise_ValueError(NULL);
	}
	while (esp_rom_get_cpu_ticks_per_us() != freq) {
	vTaskDelay(1);
	}
	}

	static void machine_sleep_helper(wake_type_t wake_type, size_t n_args, const mp_obj_t *args) {
	// First, disable any previously set wake-up source
	esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_ALL);

	// Set the expiry time of the sleep, if given.
	if (n_args != 0) {
	mp_int_t expiry = mp_obj_get_int(args[0]);
	esp_sleep_enable_timer_wakeup(((uint64_t)expiry) * 1000);
	}

	#if SOC_PM_SUPPORT_EXT0_WAKEUP
	if (machine_rtc_config.ext0_pin != -1 && (machine_rtc_config.ext0_wake_types & wake_type)) {
	esp_sleep_enable_ext0_wakeup(machine_rtc_config.ext0_pin, machine_rtc_config.ext0_level ? 1 : 0);
	}
	#endif

	#if SOC_PM_SUPPORT_EXT1_WAKEUP
	if (machine_rtc_config.ext1_pins != 0) {
	esp_sleep_enable_ext1_wakeup(
	machine_rtc_config.ext1_pins,
	machine_rtc_config.ext1_level ? ESP_EXT1_WAKEUP_ANY_HIGH : ESP_EXT1_WAKEUP_ALL_LOW);
	}
	#endif

	#if SOC_TOUCH_SENSOR_SUPPORTED
	if (machine_rtc_config.wake_on_touch) {
	if (esp_sleep_enable_touchpad_wakeup() != ESP_OK) {
	mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("esp_sleep_enable_touchpad_wakeup() failed"));
	}
	}
	#endif

	#if SOC_ULP_SUPPORTED
	if (machine_rtc_config.wake_on_ulp) {
	if (esp_sleep_enable_ulp_wakeup() != ESP_OK) {
	mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("esp_sleep_enable_ulp_wakeup() failed"));
	}
	}
	#endif

	switch (wake_type) {
	case MACHINE_WAKE_SLEEP:
	esp_light_sleep_start();
	break;
	case MACHINE_WAKE_DEEPSLEEP:
	esp_deep_sleep_start();
	break;
	}
	}

	static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
	machine_sleep_helper(MACHINE_WAKE_SLEEP, n_args, args);
	};

	MP_NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args) {
	machine_sleep_helper(MACHINE_WAKE_DEEPSLEEP, n_args, args);
	mp_machine_reset();
	};

	static mp_int_t mp_machine_reset_cause(void) {
	if (is_soft_reset) {
	return MP_SOFT_RESET;
	}
	switch (esp_reset_reason()) {
	case ESP_RST_POWERON:
	case ESP_RST_BROWNOUT:
	return MP_PWRON_RESET;

	case ESP_RST_INT_WDT:
	case ESP_RST_TASK_WDT:
	case ESP_RST_WDT:
	return MP_WDT_RESET;

	case ESP_RST_DEEPSLEEP:
	return MP_DEEPSLEEP_RESET;

	case ESP_RST_SW:
	case ESP_RST_PANIC:
	case ESP_RST_EXT: // Comment in ESP-IDF: "For ESP32, ESP_RST_EXT is never returned"
	return MP_HARD_RESET;

	case ESP_RST_SDIO:
	case ESP_RST_UNKNOWN:
	default:
	return 0;
	}
	}

	#if MICROPY_ESP32_USE_BOOTLOADER_RTC
	#include "soc/rtc_cntl_reg.h"
	#include "usb.h"
	#if CONFIG_IDF_TARGET_ESP32S3
	#include "esp32s3/rom/usb/usb_dc.h"
	#include "esp32s3/rom/usb/usb_persist.h"
	#include "esp32s3/rom/usb/chip_usb_dw_wrapper.h"
	#endif

	MP_NORETURN static void machine_bootloader_rtc(void) {
	#if CONFIG_IDF_TARGET_ESP32S3 && MICROPY_HW_USB_CDC
	usb_usj_mode();
	usb_dc_prepare_persist();
	chip_usb_set_persist_flags(USBDC_BOOT_DFU);
	#endif
	REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
	esp_restart();
	}
	#endif

	#ifdef MICROPY_BOARD_ENTER_BOOTLOADER
	MP_NORETURN void mp_machine_bootloader(size_t n_args, const mp_obj_t *args) {
	MICROPY_BOARD_ENTER_BOOTLOADER(n_args, args);
	for (;;) {
	}
	}
	#endif

	void machine_init(void) {
	is_soft_reset = 0;
	}

	void machine_deinit(void) {
	// we are doing a soft-reset so change the reset_cause
	is_soft_reset = 1;
	}

	static mp_obj_t machine_wake_reason(size_t n_args, const mp_obj_t pos_args, mp_map_t kw_args) {
	return MP_OBJ_NEW_SMALL_INT(esp_sleep_get_wakeup_cause());
	}
	static MP_DEFINE_CONST_FUN_OBJ_KW(machine_wake_reason_obj, 0, machine_wake_reason);

	MP_NORETURN static void mp_machine_reset(void) {
	esp_restart();
	}

	static mp_obj_t mp_machine_unique_id(void) {
	uint8_t chipid[6];
	esp_efuse_mac_get_default(chipid);
	return mp_obj_new_bytes(chipid, 6);
	}

	static void mp_machine_idle(void) {
	MP_THREAD_GIL_EXIT();
	taskYIELD();
	MP_THREAD_GIL_ENTER();
	}