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Add watchdog routines for Due #3111

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Merged
merged 3 commits into from
May 8, 2015
Merged

Add watchdog routines for Due #3111

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4725d75
Add watchdog routines for Due.
bobc Jul 27, 2014
d2c510d
Add Due watchdog functions; modified according to feedback supplied
bobc Jan 15, 2015
7f8cba6
Due watchdog: change flags to effectively reset board
facchinm Mar 5, 2015
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Add watchdog routines for Due.
  • Loading branch information
@bobc @facchinm
bobc authored and facchinm committed May 8, 2015
commit 4725d750546b5bb2c6abf20fa213b06742eb9766
50 changes: 48 additions & 2 deletions hardware/arduino/sam/variants/arduino_due_x/variant.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -358,6 +358,52 @@ void serialEventRun(void)
if (Serial3.available()) serialEvent3();
}

// ----------------------------------------------------------------------------
extern "C" {

/**
* Watchdog enable
*
* Enable the watchdog timer with the specified settings.
* WDTO_xxx macros provide standard settings.
* Should only be called once.
*/
void wdt_enable (uint32_t mode)
{
WDT_Enable (WDT, mode);
}

/**
* Watchdog disable
*
* Disable the watchdog timer.
* Should only be called once.
*/
void wdt_disable(void)
{
WDT_Disable (WDT);
}

/**
* Watchdog reset
*
* Resets the watchdog counter
*/
void wdt_reset(void)
{
WDT_Restart (WDT);
}

} // extern "C"

/**
* Watchdog initialize hook
*
* This function is called from init().
* Default action is to disable watchdog.
*/
void wdt_initialize(void) __attribute__ ((weak, alias("wdt_disable")));

// ----------------------------------------------------------------------------

#ifdef __cplusplus
Expand All @@ -377,8 +423,8 @@ void init( void )
while (true);
}

// Disable watchdog
WDT_Disable(WDT);
// Initialize watchdog
wdt_initialize();

// Initialize C library
__libc_init_array();
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20 changes: 20 additions & 0 deletions hardware/arduino/sam/variants/arduino_due_x/variant.h
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Expand Up @@ -232,6 +232,25 @@ static const uint8_t CAN1TX = 89;
#define TC_MIN_DUTY_CYCLE 0
#define TC_RESOLUTION 8

// Watchdog routines

#define WDTO_15MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(4) | WDT_MR_WDD(4)
#define WDTO_30MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(8) | WDT_MR_WDD(8)
#define WDTO_60MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(15) | WDT_MR_WDD(15)
#define WDTO_120MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(31) | WDT_MR_WDD(31)
#define WDTO_250MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(64) | WDT_MR_WDD(64)
#define WDTO_500MS WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(128) | WDT_MR_WDD(128)
#define WDTO_1S WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(256) | WDT_MR_WDD(256)
#define WDTO_2S WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(512) | WDT_MR_WDD(512)
#define WDTO_4S WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(1024) | WDT_MR_WDD(1024)
#define WDTO_8S WDT_MR_WDRSTEN | WDT_MR_WDRPROC | WDT_MR_WDV(2048) | WDT_MR_WDD(2048)

void wdt_enable (uint32_t mode);

void wdt_disable(void);

void wdt_reset(void);

#ifdef __cplusplus
}
#endif
Expand Down Expand Up @@ -274,5 +293,6 @@ extern USARTClass Serial3;
#define SERIAL_PORT_HARDWARE2 Serial2
#define SERIAL_PORT_HARDWARE3 Serial3


#endif /* _VARIANT_ARDUINO_DUE_X_ */