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rp2/machine_wdt: Check for the maximum timeout value of watchdog.

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The value will be checked for timeout <= 8388.  Notes were added to the
documentation.
This commit is contained in:
robert-hh
2022-08-22 08:09:02 +02:00
committed by Damien George
parent 8308f9c977
commit 47c45d0e7f
3 changed files with 12 additions and 3 deletions
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9
ports/rp2/machine_wdt.c
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@@ -29,6 +29,9 @@
#include "hardware/watchdog.h"
// The maximum timeout in milliseconds is: 0xffffff / 2 / 1000
#define WDT_TIMEOUT_MAX 8388
typedef struct _machine_wdt_obj_t {
mp_obj_base_t base;
} machine_wdt_obj_t;
@@ -53,7 +56,11 @@ STATIC mp_obj_t machine_wdt_make_new(const mp_obj_type_t *type, size_t n_args, s
}
// Start the watchdog (timeout is in milliseconds).
watchdog_enable(args[ARG_timeout].u_int, false);
uint32_t timeout = args[ARG_timeout].u_int;
if (timeout > WDT_TIMEOUT_MAX) {
mp_raise_ValueError(MP_ERROR_TEXT("timeout exceeds " MP_STRINGIFY(WDT_TIMEOUT_MAX)));
}
watchdog_enable(timeout, false);
return MP_OBJ_FROM_PTR(&machine_wdt);
}