wdttb
Vitis Drivers API Documentation
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This file contains a design example using the Watchdog Timer Timebase driver (XWdtTb) and hardware device.
None.
MODIFICATION HISTORY:
Ver Who Date Changes
1.00b jhl 02/13/02 First release 1.00b sv 04/26/05 Minor changes to comply to Doxygen and coding guidelines 2.00a ktn 12/02/09 Updated the example to use the HAL APIs/macros. Updated this example to check for Watchdog timer reset condition instead of timer expiry state to avoid a race condition 4.0 sha 02/04/16 Added debug messages. Updated WatchdogTimebase.RegBaseAddress -> WatchdogTimebase.Config.BaseAddr. Calling XWdtTb_LookupConfig and XWdtTb_CfgInitialize functions instead of XWdtTb_Initialize for initialization. 4.5 nsk 08/07/19 Add macro to support testapp generation for polled mode 5.7 sb 07/12/23 Added support for system device-tree flow. *
Functions | |
int | WdtTbExample (u16 DeviceId) |
This function tests the functioning of the TimeBase WatchDog Timer module in the polled mode. More... | |
int | main (void) |
Main function to call the Wdttb driver example. More... | |
int main | ( | void | ) |
Main function to call the Wdttb driver example.
References WdtTbExample().
int WdtTbExample | ( | u16 | DeviceId | ) |
This function tests the functioning of the TimeBase WatchDog Timer module in the polled mode.
After one expiration of the WDT timeout interval, the WDT state bit is set to one in the status register. If the state bit is not cleared (by writing a 1 to the state bit) before the next expiration of the timeout interval, a WDT reset is generated.
This function checks for Watchdog timer reset condition in two timer expiry state.
This function may require some time (seconds or even minutes) to execute because it waits for the watchdog timer to expire.
DeviceId | is the XPAR_<WDTB_instance>_DEVICE_ID value from xparameters.h. |
References XWdtTb_Config::BaseAddr, XWdtTb::Config, XWdtTb_CfgInitialize(), XWdtTb_IsWdtExpired(), XWdtTb_LookupConfig(), XWdtTb_ReadReg, XWdtTb_RestartWdt(), XWdtTb_SelfTest(), XWdtTb_Start(), XWdtTb_Stop(), XWT_CSR0_WRS_MASK, and XWT_TWCSR0_OFFSET.
Referenced by main().