Watchdog Timer (WDT)

Macros
#define	CPU_WDT_WTCNT(x)   (0x5A00U | ((x) & 0x00FF))
	Value to write to the CPU-WDT WTCNTW register.
#define	CPU_WDT_WTCSR(x)   (0xA500U | ((x) & 0x00FF))
	Value to write to the CPU-WDT WTCSRW register.
#define	CPU_WDT_CLEAR_WOVF_RSTCSR   (0xA500U)
	Value to write to the CPU-WDT RSTCSRW register.
#define	CPU_WDT_CLEAR_RSTCSR(x)   (0x5A3FU | ((x) & 0x00FF))
	Value to write to the CPU-WDT RSTCSRW register.

Typedefs
typedef enum cpu_wdt_clock	cpu_wdt_clock_t
	CPU-WDT clock divisors.
typedef enum cpu_wdt_mode	cpu_wdt_mode_t
	CPU-WDT modes.
typedef void(*	cpu_wdt_ihr_t) (void)
	Callback type.

Enumerations
enum	cpu_wdt_clock
	CPU-WDT clock divisors. More...
enum	cpu_wdt_mode
	CPU-WDT modes. More...

Functions
static void	cpu_wdt_count_set (uint8_t count)
	Set the 1-byte WDT tick count.
static uint8_t	cpu_wdt_count_get (void)
	Obtain the current 1-byte WDT tick count.
static void	cpu_wdt_enable (void)
	Enable the CPU-WDT.
static void	cpu_wdt_disable (void)
	Disable the CPU-WDT.
static uint8_t	cpu_wdt_interrupt_priority_get (void)
	Obtain the interrupt priority level for CPU-WDT.
static void	cpu_wdt_interrupt_priority_set (uint8_t priority)
	Set the interrupt priority level for CPU-WDT.
void	cpu_wdt_init (cpu_wdt_clock_t clock_div)
	Fully initialize the CPU-WDT depending with a specific clock divisor.

Detailed Description

Description goes here.

Macro Definition Documentation

CPU_WDT_WTCNT

#define CPU_WDT_WTCNT

(

x

)

(0x5A00U | ((x) & 0x00FF))

Value to write to the CPU-WDT WTCNTW register.

Parameters

x	The 2-byte value.

CPU_WDT_WTCSR

#define CPU_WDT_WTCSR

(

x

)

(0xA500U | ((x) & 0x00FF))

Value to write to the CPU-WDT WTCSRW register.

When clearing the WOVF bit:

*(volatile uint16_t *)RSTCSRW = 0xA500 | 0x00;

Parameters

x	The 2-byte value.

CPU_WDT_CLEAR_WOVF_RSTCSR

#define CPU_WDT_CLEAR_WOVF_RSTCSR   (0xA500U)

Value to write to the CPU-WDT RSTCSRW register.

For writing to WTCSRW and WTCNTW, use 16-bit writes only:

*(volatile uint16_t *)WTCSRW = 0xA518 | (value & 0xFF);
*(volatile uint16_t *)WTCNTW = 0x5A00 | (value & 0xFF);

CPU_WDT_CLEAR_RSTCSR

#define CPU_WDT_CLEAR_RSTCSR

(

x

)

(0x5A3FU | ((x) & 0x00FF))

Value to write to the CPU-WDT RSTCSRW register.

Parameters

x	The 2-byte value.

Typedef Documentation

cpu_wdt_clock_t

typedef enum cpu_wdt_clock cpu_wdt_clock_t

CPU-WDT clock divisors.

See also

cpu_wdt_init

cpu_wdt_mode_t

typedef enum cpu_wdt_mode cpu_wdt_mode_t

CPU-WDT modes.

See also

cpu_wdt_timer_mode_set

cpu_wdt_ihr_t

typedef void(* cpu_wdt_ihr_t) (void)

Callback type.

See also

cpu_wdt_timer_mode_set

Enumeration Type Documentation

cpu_wdt_clock

enum cpu_wdt_clock

CPU-WDT clock divisors.

See also

cpu_wdt_init

Enumerator
CPU_WDT_CLOCK_DIV_2	WDT clock divisor of \(\frac{\phi}{2}\).
CPU_WDT_CLOCK_DIV_64	WDT clock divisor of \(\frac{\phi}{64}\).
CPU_WDT_CLOCK_DIV_128	WDT clock divisor of \(\frac{\phi}{128}\).
CPU_WDT_CLOCK_DIV_256	WDT clock divisor of \(\frac{\phi}{256}\).
CPU_WDT_CLOCK_DIV_512	WDT clock divisor of \(\frac{\phi}{512}\).
CPU_WDT_CLOCK_DIV_1024	WDT clock divisor of \(\frac{\phi}{1024}\).
CPU_WDT_CLOCK_DIV_4096	WDT clock divisor of \(\frac{\phi}{4096}\).
CPU_WDT_CLOCK_DIV_8192	WDT clock divisor of \(\frac{\phi}{8192}\).

cpu_wdt_mode

enum cpu_wdt_mode

CPU-WDT modes.

See also

cpu_wdt_timer_mode_set

Enumerator
CPU_WDT_MODE_INTERVAL	Interval mode.
CPU_WDT_MODE_WATCHDOG	Watchdog mode.

Function Documentation

cpu_wdt_count_set()

static void cpu_wdt_count_set ( uint8_t  count )

inlinestatic

Set the 1-byte WDT tick count.

Parameters

count

The 1-byte tick value to set.

cpu_wdt_count_get()

static uint8_t cpu_wdt_count_get ( void  )

inlinestatic

Obtain the current 1-byte WDT tick count.

Returns

Return the 1-byte WDT tick count.

cpu_wdt_interrupt_priority_get()

static uint8_t cpu_wdt_interrupt_priority_get ( void  )

inlinestatic

Obtain the interrupt priority level for CPU-WDT.

Returns

The interrupt priority level ranging from 0 to 15.

cpu_wdt_interrupt_priority_set()

static void cpu_wdt_interrupt_priority_set ( uint8_t  priority )

inlinestatic

Set the interrupt priority level for CPU-WDT.

Parameters

priority

The priority ranging from 0 to 15.

cpu_wdt_init()

void cpu_wdt_init

(

cpu_wdt_clock_t

clock_div

)

Fully initialize the CPU-WDT depending with a specific clock divisor.

Parameters

clock_div

The clock divisor.