1 files changed, 78 insertions, 0 deletions
diff --git a/ports/rp2/machine_wdt.c b/ports/rp2/machine_wdt.c
new file mode 100644
index 000000000..38e059701
--- /dev/null
+++ b/ports/rp2/machine_wdt.c
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020-2021 Damien P. George
+ *
+ * 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 "py/runtime.h"
+#include "modmachine.h"
+
+#include "hardware/watchdog.h"
+
+typedef struct _machine_wdt_obj_t {
+    mp_obj_base_t base;
+} machine_wdt_obj_t;
+
+STATIC const machine_wdt_obj_t machine_wdt = {{&machine_wdt_type}};
+
+STATIC mp_obj_t machine_wdt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
+    enum { ARG_id, ARG_timeout };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_timeout, MP_ARG_INT, {.u_int = 5000} },
+    };
+
+    // Parse the arguments.
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    // Verify the WDT id.
+    mp_int_t id = args[ARG_id].u_int;
+    if (id != 0) {
+        mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("WDT(%d) doesn't exist"), id);
+    }
+
+    // Start the watchdog (timeout is in milliseconds).
+    watchdog_enable(args[ARG_timeout].u_int, false);
+
+    return MP_OBJ_FROM_PTR(&machine_wdt);
+}
+
+STATIC mp_obj_t machine_wdt_feed(mp_obj_t self_in) {
+    (void)self_in;
+    watchdog_update();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_wdt_feed_obj, machine_wdt_feed);
+
+STATIC const mp_rom_map_elem_t machine_wdt_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_feed), MP_ROM_PTR(&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_dict_t *)&machine_wdt_locals_dict,
+};