COP: Watchdog Driver

Overview

The MCUXpresso SDK provides a peripheral driver for the Computer Operating Properly module (COP) of MCUXpresso SDK devices.

Typical use case

cop_config_t config;
COP_GetDefaultConfig(&config);
config.timeoutCycles = kCOP_2Power8CyclesOr2Power16Cycles;
COP_Init(sim_base,&config);

Data Structures
struct	cop_config_t
	Describes COP configuration structure. More...

Enumerations
enum	cop_clock_source_t {   kCOP_LpoClock = 0U,   kCOP_McgIrClock = 1U,   kCOP_OscErClock = 2U,   kCOP_BusClock = 3U }
	COP clock source selection. More...
enum	cop_timeout_cycles_t {   kCOP_2Power5CyclesOr2Power13Cycles = 1U,   kCOP_2Power8CyclesOr2Power16Cycles = 2U,   kCOP_2Power10CyclesOr2Power18Cycles = 3U }
	Define the COP timeout cycles. More...
enum	cop_timeout_mode_t {   kCOP_ShortTimeoutMode = 0U,   kCOP_LongTimeoutMode = 1U }
	Define the COP timeout mode. More...

Driver version
#define	FSL_COP_DRIVER_VERSION   (MAKE_VERSION(2, 0, 0))
	COP driver version 2.0.0. More...

COP refresh sequence.
#define	COP_FIRST_BYTE_OF_REFRESH   (0x55U)
	First byte of refresh sequence.
#define	COP_SECOND_BYTE_OF_REFRESH   (0xAAU)
	Second byte of refresh sequence.

COP Functional Operation
void	COP_GetDefaultConfig (cop_config_t *config)
	Initializes the COP configuration structure. More...
void	COP_Init (SIM_Type *base, const cop_config_t *config)
	Initializes the COP module. More...
static void	COP_Disable (SIM_Type *base)
	De-initializes the COP module. More...
void	COP_Refresh (SIM_Type *base)
	Refreshes the COP timer. More...

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Data Structure Documentation

struct cop_config_t

Data Fields
bool	enableWindowMode
	COP run mode: window mode or normal mode.
cop_timeout_mode_t	timeoutMode
	COP timeout mode: long timeout or short timeout.
bool	enableStop
	Enable or disable COP in STOP mode.
bool	enableDebug
	Enable or disable COP in DEBUG mode.
cop_clock_source_t	clockSource
	Set COP clock source.
cop_timeout_cycles_t	timeoutCycles
	Set COP timeout value.

Macro Definition Documentation

#define FSL_COP_DRIVER_VERSION   (MAKE_VERSION(2, 0, 0))

Enumeration Type Documentation

enum cop_clock_source_t

Enumerator
kCOP_LpoClock	COP clock sourced from LPO.
kCOP_McgIrClock	COP clock sourced from MCGIRCLK.
kCOP_OscErClock	COP clock sourced from OSCERCLK.
kCOP_BusClock	COP clock sourced from Bus clock.

enum cop_timeout_cycles_t

Enumerator
kCOP_2Power5CyclesOr2Power13Cycles	2^5 or 2^13 clock cycles
kCOP_2Power8CyclesOr2Power16Cycles	2^8 or 2^16 clock cycles
kCOP_2Power10CyclesOr2Power18Cycles	2^10 or 2^18 clock cycles

enum cop_timeout_mode_t

Enumerator
kCOP_ShortTimeoutMode	COP selects long timeout.
kCOP_LongTimeoutMode	COP selects short timeout.

Function Documentation

void COP_GetDefaultConfig

(

cop_config_t *

config

)

This function initializes the COP configuration structure to default values. The default values are:

*   copConfig->enableWindowMode = false;
*   copConfig->timeoutMode = kCOP_LongTimeoutMode;
*   copConfig->enableStop = false;
*   copConfig->enableDebug = false;
*   copConfig->clockSource = kCOP_LpoClock;
*   copConfig->timeoutCycles = kCOP_2Power10CyclesOr2Power18Cycles;
* 

Parameters

config

Pointer to the COP configuration structure.

See Also

cop_config_t

void COP_Init	(	SIM_Type *	base,
		const cop_config_t *	config
	)

This function configures the COP. After it is called, the COP starts running according to the configuration. Because all COP control registers are write-once only, the COP_Init function and the COP_Disable function can be called only once. A second call has no effect.

Example:

*  cop_config_t config;
*  COP_GetDefaultConfig(&config);
*  config.timeoutCycles = kCOP_2Power8CyclesOr2Power16Cycles;
*  COP_Init(sim_base,&config);
* 

Parameters

base	SIM peripheral base address.
config	The configuration of COP.

static void COP_Disable ( SIM_Type *  base )

inlinestatic

This dedicated function is not provided. Instead, the COP_Disable function can be used to disable the COP.

Disables the COP module.

This function disables the COP Watchdog. Note: The COP configuration register is a write-once after reset. To disable the COP Watchdog, call this function first.

Parameters

base	SIM peripheral base address.

void COP_Refresh

(

SIM_Type *

base

)

This function feeds the COP.

Parameters

base	SIM peripheral base address.