libopencm3
A free/libre/open-source firmware library for various ARM Cortex-M3 microcontrollers.
•All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Modules Pages
Functions
CLOCK peripheral API
Peripheral APIs

Access functions for the NRF51 Clock Controller More...

Collaboration diagram for CLOCK peripheral API:

Functions

void clock_set_xtal_freq (enum clock_xtal_freq freq)
 Select nominal frequency of external crystal for HFCLK. More...
 
void clock_start_lfclk (bool wait)
 Start Low Frequency Clock. More...
 
void clock_stop_lfclk ()
 Stop Low Frequency Clock. More...
 
void clock_start_hfclk (bool wait)
 Start High Frequency Crystal Oscillator. More...
 
void clock_stop_hfclk ()
 Stop High Frequency Crystal Oscillator. More...
 
void clock_set_lfclk_src (enum clock_lfclk_src lfclk_src)
 Low Frequency Clock Source. More...
 

Detailed Description

Access functions for the NRF51 Clock Controller

Access functions for the Clock Controller

LGPL License Terms libopencm3 License

Author
© 2016 Roel Postelmans

LGPL License Terms libopencm3 License

Author
© 2016 Maxim Sloyko maxim.nosp@m.s@go.nosp@m.ogle..nosp@m.com
© 2021 Eduard Drusa <ventyl86 at netkosice dot sk>

Function Documentation

◆ clock_set_lfclk_src()

void clock_set_lfclk_src ( enum clock_lfclk_src  lfclk_src)

Low Frequency Clock Source.

Parameters
[in]lfclk_srcenum clock_lfclk_src

Definition at line 78 of file clock_common.c.

References CLOCK_LFCLKSRC.

◆ clock_set_xtal_freq()

void clock_set_xtal_freq ( enum clock_xtal_freq  freq)

Select nominal frequency of external crystal for HFCLK.

This register has to match the actual crystal used in design to enable correct behaviour.

Parameters
[in]freqenum clock_xtal_freq

Definition at line 40 of file clock.c.

References CLOCK_XTALFREQ.

◆ clock_start_hfclk()

void clock_start_hfclk ( bool  wait)

Start High Frequency Crystal Oscillator.

Oscillator needs to be running for the radio to work.

Parameters
[in]waitbool If true, will busy wait for the clock to start.

Definition at line 60 of file clock_common.c.

References CLOCK_HFCLKSTAT, CLOCK_HFCLKSTAT_STATE, CLOCK_TASK_HFCLKSTART, and PERIPH_TRIGGER_TASK.

◆ clock_start_lfclk()

void clock_start_lfclk ( bool  wait)

Start Low Frequency Clock.

Parameters
[in]waitbool: If true, will busy wait for the clock to start.

Definition at line 40 of file clock_common.c.

References CLOCK_LFCLKSTAT, CLOCK_LFCLKSTAT_STATE, CLOCK_TASK_LFCLKSTART, and PERIPH_TRIGGER_TASK.

◆ clock_stop_hfclk()

void clock_stop_hfclk ( void  )

Stop High Frequency Crystal Oscillator.

Definition at line 69 of file clock_common.c.

References CLOCK_TASK_HFCLKSTOP, and PERIPH_TRIGGER_TASK.

◆ clock_stop_lfclk()

void clock_stop_lfclk ( void  )

Stop Low Frequency Clock.

Definition at line 49 of file clock_common.c.

References CLOCK_TASK_LFCLKSTOP, and PERIPH_TRIGGER_TASK.