CMU peripheral API

Collaboration diagram for CMU peripheral API:

Macros
#define	_CMU_REG(i)   MMIO32(CMU_BASE + ((i) >> 5))
#define	_CMU_BIT(i)   (1 << ((i) & 0x1f))

Functions
void	cmu_enable_lock (void)
	Enable CMU registers lock. More...
void	cmu_disable_lock (void)
	Disable CMU registers lock. More...
bool	cmu_get_lock_flag (void)
	Get CMU register lock flag. More...
void	cmu_periph_clock_enable (enum cmu_periph_clken clken)
	Enable Peripheral Clock in running mode. More...
void	cmu_periph_clock_disable (enum cmu_periph_clken clken)
	Disable Peripheral Clock in running mode. More...
void	cmu_osc_on (enum cmu_osc osc)
	Turn on Oscillator. More...
void	cmu_osc_off (enum cmu_osc osc)
	Turn off Oscillator. More...
bool	cmu_osc_ready_flag (enum cmu_osc osc)
	Get Oscillator read flag. More...
void	cmu_wait_for_osc_ready (enum cmu_osc osc)
	Wait while oscillator is not ready. More...
void	cmu_set_hfclk_source (enum cmu_osc osc)
	Set HFCLK clock source. More...
enum cmu_osc	cmu_get_hfclk_source (void)
	Get HFCLK clock source. More...
void	cmu_set_usbclk_source (enum cmu_osc osc)
	Set USBCLK clock source. More...
void	cmu_wait_for_usbclk_selected (enum cmu_osc osc)
	Wait while USBCLK is not selected. More...

Detailed Description

Macro Definition Documentation

_CMU_BIT

#define _CMU_BIT

(

i

)

(1 << ((i) & 0x1f))

Definition at line 55 of file cmu.c.

_CMU_REG

#define _CMU_REG

(

i

)

MMIO32(CMU_BASE + ((i) >> 5))

Definition at line 54 of file cmu.c.

Function Documentation

cmu_disable_lock()

void cmu_disable_lock

(

void

)

Disable CMU registers lock.

Definition at line 39 of file cmu.c.

References CMU_LOCK, and CMU_LOCK_LOCKKEY_UNLOCK.

cmu_enable_lock()

void cmu_enable_lock

(

void

)

Enable CMU registers lock.

Definition at line 31 of file cmu.c.

References CMU_LOCK, and CMU_LOCK_LOCKKEY_LOCK.

cmu_get_hfclk_source()

enum cmu_osc cmu_get_hfclk_source

(

void

)

Get HFCLK clock source.

Return values

enum	cmu_osc Oscillator name

Definition at line 251 of file cmu.c.

References CMU_STATUS, CMU_STATUS_HFRCOSEL, CMU_STATUS_HFXOSEL, CMU_STATUS_LFRCOSEL, CMU_STATUS_LFXOSEL, CMU_STATUS_USHFRCODIV2SEL, HFRCO, HFXO, LFRCO, LFXO, and USHFRCODIV2.

cmu_get_lock_flag()

bool cmu_get_lock_flag

(

void

)

Get CMU register lock flag.

Return values

true	if flag is set
false	if flag is not set

Definition at line 49 of file cmu.c.

References CMU_LOCK, CMU_LOCK_LOCKKEY_LOCKED, and CMU_LOCK_LOCKKEY_MASK.

cmu_osc_off()

void cmu_osc_off

(

enum cmu_osc

osc

)

Turn off Oscillator.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Definition at line 123 of file cmu.c.

References AUXHFRCO, CMU_OSCENCMD, CMU_OSCENCMD_AUXHFRCODIS, CMU_OSCENCMD_HFRCODIS, CMU_OSCENCMD_HFXODIS, CMU_OSCENCMD_LFRCODIS, CMU_OSCENCMD_LFXODIS, CMU_OSCENCMD_USHFRCODIS, HFRCO, HFXO, LFRCO, LFXO, and USHFRCO.

cmu_osc_on()

void cmu_osc_on

(

enum cmu_osc

osc

)

Turn on Oscillator.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Definition at line 92 of file cmu.c.

References AUXHFRCO, CMU_OSCENCMD, CMU_OSCENCMD_AUXHFRCOEN, CMU_OSCENCMD_HFRCOEN, CMU_OSCENCMD_HFXOEN, CMU_OSCENCMD_LFRCOEN, CMU_OSCENCMD_LFXOEN, CMU_OSCENCMD_USHFRCOEN, HFRCO, HFXO, LFRCO, LFXO, and USHFRCO.

Referenced by efm32hg_usbd_init().

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cmu_osc_ready_flag()

bool cmu_osc_ready_flag

(

enum cmu_osc

osc

)

Get Oscillator read flag.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Return values

true	if flag is set
false	if flag is not set

Definition at line 156 of file cmu.c.

References AUXHFRCO, CMU_STATUS, CMU_STATUS_AUXHFRCORDY, CMU_STATUS_HFRCORDY, CMU_STATUS_HFXORDY, CMU_STATUS_LFRCORDY, CMU_STATUS_LFXORDY, CMU_STATUS_USHFRCORDY, HFRCO, HFXO, LFRCO, LFXO, and USHFRCO.

cmu_periph_clock_disable()

void cmu_periph_clock_disable

(

enum cmu_periph_clken

clken

)

Disable Peripheral Clock in running mode.

Disable the clock on particular peripheral.

Parameters

[in]

clken

Peripheral Name

For available constants, see enum::cmu_periph_clken (CMU_LEUART1 for example)

Definition at line 83 of file cmu.c.

References _CMU_REG.

cmu_periph_clock_enable()

void cmu_periph_clock_enable

(

enum cmu_periph_clken

clken

)

Enable Peripheral Clock in running mode.

Enable the clock on particular peripheral.

Parameters

[in]

clken

Peripheral Name

For available constants, see enum::cmu_periph_clken (CMU_LEUART1 for example)

Definition at line 68 of file cmu.c.

References _CMU_BIT, and _CMU_REG.

Referenced by efm32hg_usbd_init().

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cmu_set_hfclk_source()

void cmu_set_hfclk_source

(

enum cmu_osc

osc

)

Set HFCLK clock source.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Note

calling cmu_set_hfclk_source() do not set source immediately, use cmu_get_hfclk_source() to verify that the source has been set.

See also

cmu_get_hfclk_source()

Definition at line 223 of file cmu.c.

References CMU_CMD, CMU_CMD_HFCLKSEL_HFRCO, CMU_CMD_HFCLKSEL_HFXO, CMU_CMD_HFCLKSEL_LFRCO, CMU_CMD_HFCLKSEL_LFXO, CMU_CMD_HFCLKSEL_USHFRCODIV2, HFRCO, HFXO, LFRCO, LFXO, and USHFRCODIV2.

cmu_set_usbclk_source()

void cmu_set_usbclk_source

(

enum cmu_osc

osc

)

Set USBCLK clock source.

Parameters

osc	Oscillator name

Definition at line 274 of file cmu.c.

References CMU_CMD, CMU_CMD_USBCCLKSEL_LFRCO, CMU_CMD_USBCCLKSEL_LFXO, CMU_CMD_USBCCLKSEL_USHFRCO, LFRCO, LFXO, and USHFRCO.

Referenced by efm32hg_usbd_init().

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cmu_wait_for_osc_ready()

void cmu_wait_for_osc_ready

(

enum cmu_osc

osc

)

Wait while oscillator is not ready.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Definition at line 189 of file cmu.c.

References AUXHFRCO, CMU_STATUS, CMU_STATUS_AUXHFRCORDY, CMU_STATUS_HFRCORDY, CMU_STATUS_HFXORDY, CMU_STATUS_LFRCORDY, CMU_STATUS_LFXORDY, CMU_STATUS_USHFRCORDY, HFRCO, HFXO, LFRCO, LFXO, and USHFRCO.

Referenced by efm32hg_usbd_init().

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cmu_wait_for_usbclk_selected()

void cmu_wait_for_usbclk_selected

(

enum cmu_osc

osc

)

Wait while USBCLK is not selected.

Parameters

[in]

osc

enum cmu_osc Oscillator name

Definition at line 296 of file cmu.c.

References CMU_STATUS, CMU_STATUS_USBCLFRCOSEL, CMU_STATUS_USBCLFXOSEL, CMU_STATUS_USBCUSHFRCOSEL, LFRCO, LFXO, and USHFRCO.

Referenced by efm32hg_usbd_init().

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