esp32: Implement machine.WDT() class.

ports/esp32/Makefile

@@ -141,6 +141,7 @@ SRC_C = \
 	moduhashlib.c \
 	espneopixel.c \
 	machine_hw_spi.c \
+	machine_wdt.c \
 	mpthreadport.c \
 	$(SRC_MOD)
 

ports/esp32/machine_wdt.c

@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Paul Sokolovsky
+ * Copyright (c) 2017 Eric Poulsen
+ *
+ * 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.
+ */
+
+#include <string.h>
+
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "esp_task_wdt.h"
+
+const mp_obj_type_t machine_wdt_type;
+
+typedef struct _machine_wdt_obj_t {
+    mp_obj_base_t base;
+} machine_wdt_obj_t;
+
+STATIC machine_wdt_obj_t wdt_default = {{&machine_wdt_type}};
+
+STATIC mp_obj_t machine_wdt_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    mp_arg_check_num(n_args, n_kw, 0, 1, false);
+
+    mp_int_t id = 0;
+    if (n_args > 0) {
+        id = mp_obj_get_int(args[0]);
+    }
+
+    switch (id) {
+        case 0:
+            esp_task_wdt_feed();
+            return &wdt_default;
+        default:
+            mp_raise_ValueError(NULL);
+    }
+}
+
+STATIC mp_obj_t machine_wdt_feed(mp_obj_t self_in) {
+    (void)self_in;
+    esp_task_wdt_feed();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_wdt_feed_obj, machine_wdt_feed);
+
+STATIC const mp_map_elem_t machine_wdt_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_feed), (mp_obj_t)&machine_wdt_feed_obj },
+};
+STATIC MP_DEFINE_CONST_DICT(machine_wdt_locals_dict, machine_wdt_locals_dict_table);
+
+const mp_obj_type_t machine_wdt_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_WDT,
+    .make_new = machine_wdt_make_new,
+    .locals_dict = (mp_obj_t)&machine_wdt_locals_dict,
+};

ports/esp32/modmachine.c

@@ -114,6 +114,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
 
     { MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
+    { MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
     { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) },
     { MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
     { MP_ROM_QSTR(MP_QSTR_TouchPad), MP_ROM_PTR(&machine_touchpad_type) },

ports/esp32/modmachine.h

@@ -4,6 +4,7 @@
 #include "py/obj.h"
 
 extern const mp_obj_type_t machine_timer_type;
+extern const mp_obj_type_t machine_wdt_type;
 extern const mp_obj_type_t machine_pin_type;
 extern const mp_obj_type_t machine_touchpad_type;
 extern const mp_obj_type_t machine_adc_type;

ports/esp32/sdkconfig.h

@@ -45,6 +45,7 @@
 #define CONFIG_INT_WDT_TIMEOUT_MS 300
 #define CONFIG_INT_WDT_CHECK_CPU1 0
 #define CONFIG_TASK_WDT 1
+#define CONFIG_TASK_WDT_PANIC 1
 #define CONFIG_TASK_WDT_TIMEOUT_S 5
 #define CONFIG_TASK_WDT_CHECK_IDLE_TASK 0
 #define CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU1 0