The nRF52840 System-on-Chip

This group documents the Nordic Semiconductor nRF52840 CPU. More...

Topics
	Device drivers

Files
file	arch/cpu/nrf52840/dbg.c
	Hardware specific implementation of putchar() and puts() functions.
file	arch/cpu/nrf52840/rtimer-arch.c
	Architecture dependent rtimer implementation header file.
file	arch/cpu/nrf52840/rtimer-arch.h
	Architecture dependent rtimer implementation header file.

Functions
int	dbg_putchar (int c)
	Print a character to debug output.
unsigned int	dbg_send_bytes (const unsigned char *s, unsigned int len)
	Print a stream of bytes.
void	rtimer_arch_init (void)
	Initialized the architecture-dependent part of rtimer.
void	rtimer_arch_schedule (rtimer_clock_t t)
	This function schedules a one-shot event with the nRF RTC.
rtimer_clock_t	rtimer_arch_now ()
	Returns the current real-time clock time.

Detailed Description

This group documents the Nordic Semiconductor nRF52840 CPU.

Function Documentation

dbg_putchar()

int dbg_putchar

(

int

c

)

Print a character to debug output.

Parameters

c	Character to print

Returns

Printed character

Definition at line 59 of file dbg.c.

dbg_send_bytes()

unsigned int dbg_send_bytes	(	const unsigned char *	seq,
		unsigned int	len )

Print a stream of bytes.

Parameters

seq	A pointer to the stream
len	The number of bytes to print

Returns

The number of printed bytes

Definition at line 71 of file dbg.c.

References dbg_putchar().

rtimer_arch_init()

void rtimer_arch_init

(

void

)

Initialized the architecture-dependent part of rtimer.

We don't need to explicitly initialise anything but this routine is required by the API.

Initialized the architecture-dependent part of rtimer.

The Sleep Timer starts ticking automatically as soon as the device turns on. We don't need to turn on interrupts before the first call to rtimer_arch_schedule()

Definition at line 52 of file rtimer-arch.c.

rtimer_arch_now()

rtimer_clock_t rtimer_arch_now

(

void

)

Returns the current real-time clock time.

Returns

The current rtimer time in ticks

See also

RTIMER_NOW()

< ST count/compare value 0

< ST count/compare value 1

< ST count/compare value 2

< ST count/compare value 3

Definition at line 76 of file rtimer-arch.c.

rtimer_arch_schedule()

void rtimer_arch_schedule

(

rtimer_clock_t

t

)

This function schedules a one-shot event with the nRF RTC.

Schedules an rtimer task to be triggered at time t.

Parameters

t	The time when the task will need executed.

t is an absolute time, in other words the task will be executed AT time t, not IN t rtimer ticks.

< Compare value load status

< STx upload status signal

< ST count/compare value 3

< ST count/compare value 2

< ST count/compare value 1

< ST count/compare value 0

Definition at line 70 of file rtimer-arch.c.