Reset WDT in window mode

In this use case, the WDT is configured for:

• Window mode
• Timeout period of 16 ms

The use case enables the WDT in window mode, and resets it after 10 ms to prevent system reset before window timeout after 8 ms and after time out period of 16 ms.

Setup steps

Prerequisites

For the setup code of this use case to work, the following must be added to the project:

1. Busy-Wait Delay Routines

Example code

Add to application initialization:

wdt_set_timeout_period(WDT_TIMEOUT_PERIOD_16CLK);
wdt_enable();
wdt_set_window_period(WDT_TIMEOUT_PERIOD_8CLK);
wdt_enable_window_mode();

Workflow

1. Set timeout period to 16 cycles or 16 ms:

   • wdt_set_timeout_period(WDT_TIMEOUT_PERIOD_16CLK); 

2. Enable WDT:

   • wdt_enable(); 

3. Set window period to 8 cycles or 8 ms:

   • wdt_set_window_period(WDT_TIMEOUT_PERIOD_8CLK); 

4. Enable window mode:

   • wdt_enable_window_mode(); 

Usage steps

Example code

Add to, e.g., main loop in application C-file:

delay_ms(10);
wdt_reset();

Workflow

1. Wait for 10 ms to not reset the WDT before window timeout:

   • delay_ms(10); 

2. Reset the WDT before the timeout period is over to prevent system reset:

   • wdt_reset();