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RP2040 and RP2350 have different maximum watchdog delays (#2500)

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Andrew Scheller 2025-06-12 23:43:53 +01:00 • committed by GitHub
parent a1faacff07
commit e6d18920c7
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1 changed files with 9 additions and 2 deletions
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11
src/rp2_common/hardware_watchdog/include/hardware/watchdog.h
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@ -74,6 +74,13 @@ void watchdog_update(void);
* \note If \ref watchdog_start_tick value does not give a 1MHz clock to the watchdog system, then the \p delay_ms
* parameter will not be in milliseconds. See the datasheet for more details.
*
* \if rp2040_specific
* On RP2040 the maximum delay is 8388 milliseconds, which is approximately 8.3 seconds (this is due to RP2040-E1).
* \endif
* \if rp2350_specific
* On RP2350 the maximum delay is 16777 milliseconds, which is approximately 16.7 seconds.
* \endif
*
* By default the SDK assumes a 12MHz XOSC and sets the \ref watchdog_start_tick appropriately.
*
* This method sets a marker in the watchdog scratch register 4 that is checked by \ref watchdog_enable_caused_reboot.
@ -81,7 +88,7 @@ void watchdog_update(void);
* onto the RPI-RP2), then this value will be cleared, and so \ref watchdog_enable_caused_reboot will
* return false.
*
* \param delay_ms Number of milliseconds before watchdog will reboot without watchdog_update being called. Maximum of 8388, which is approximately 8.3 seconds
* \param delay_ms Number of milliseconds before watchdog will reboot without watchdog_update being called
* \param pause_on_debug If the watchdog should be paused when the debugger is stepping through code
*/
void watchdog_enable(uint32_t delay_ms, bool pause_on_debug);
@ -124,7 +131,7 @@ bool watchdog_enable_caused_reboot(void);
* \brief Returns the number of microseconds before the watchdog will reboot the chip.
* \ingroup hardware_watchdog
*
* \if rp2040_specicifc
* \if rp2040_specific
* On RP2040 this method returns the last value set instead of the remaining time due to a h/w bug.
* \endif
*