Semaphore (SEMA)

Modules
	SEMA_Registers

Functions
int	MXC_SEMA_Init (void)
int	MXC_SEMA_GetSema (unsigned sema)
int	MXC_SEMA_CheckSema (unsigned sema)
uint32_t	MXC_SEMA_Status (void)
void	MXC_SEMA_FreeSema (unsigned sema)
int	MXC_SEMA_Shutdown (void)

Detailed Description

Function Documentation

MXC_SEMA_CheckSema()

int MXC_SEMA_CheckSema

(

unsigned

sema

)

Check a semaphore.

Parameters

sema	Number of semaphore you want to check.

Returns

E_NO_ERROR if semaphore is free. E_BUSY if semaphore is already locked.

Note

Will not be atomic if you call this function and then attempt to MXC_SEMA_GetSema().

MXC_SEMA_FreeSema()

void MXC_SEMA_FreeSema

(

unsigned

sema

)

Frees the semaphore.

Parameters

sema	Number of semaphore want to free.

MXC_SEMA_GetSema()

int MXC_SEMA_GetSema

(

unsigned

sema

)

Attempt to get a semaphore.

Parameters

sema	Number of semaphore you are trying to get.

Returns

E_NO_ERROR if semaphore acquired. E_BUSY if semaphore is already locked.

MXC_SEMA_Init()

int MXC_SEMA_Init

(

void

)

Initialize the semaphore peripheral.

Returns

E_NO_ERROR if semaphore acquired.

MXC_SEMA_Shutdown()

int MXC_SEMA_Shutdown

(

void

)

Shutdown the semaphore peripheral.

Returns

E_NO_ERROR if semaphore released.

MXC_SEMA_Status()

uint32_t MXC_SEMA_Status

(

void

)

Check all semaphores.

Returns

Status of all semaphores. Each semaphore will be represented by 1 bit.

Note

Will not be atomic if you call this function and then attempt to MXC_SEMA_GetSema().