timer.c File Reference

Timer controller for the mbed lpc1768 board. More...

#include <stdio.h>
#include <rtems/status-checks.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/io.h>
#include <bsp/timer.h>

Functions
rtems_status_code	lpc176x_timer_reset (const lpc176x_timer_number tnumber)
	resets timer counter and stops it.
rtems_status_code	lpc176x_timer_set_mode (const lpc176x_timer_number tnumber, const lpc176x_timer_mode mode)
	Sets mode of the timer (timer, counter rising, counter falling or counter both edges)
rtems_status_code	lpc176x_timer_start (const lpc176x_timer_number tnumber)
	Starts the timer counter.
rtems_status_code	lpc176x_timer_is_started (const lpc176x_timer_number tnumber, bool *is_started)
	true if timer is started.
rtems_status_code	lpc176x_timer_set_resolution (const lpc176x_timer_number tnumber, const lpc176x_microseconds resolution)
	sets the resolution in microseconds of the timer
rtems_status_code	lpc176x_timer_match_config (const lpc176x_timer_number tnumber, const lpc176x_match_port match_port, const lpc176x_match_function function, const uint32_t match_value)
	Configures the timer match.
rtems_status_code	lpc176x_timer_capture_config (const lpc176x_timer_number tnumber, const lpc176x_capture_port capture_port, const lpc176x_capture_function function)
	Configures the capture ports.
rtems_status_code	lpc176x_timer_external_match_config (const lpc176x_timer_number number, const lpc176x_match_port match_port, const lpc176x_ext_match_function function)
	Configures the external match ports.
uint32_t	lpc176x_timer_get_capvalue (const lpc176x_timer_number number, const lpc176x_capture_port capture_port)
	Gets the captured value.
uint32_t	lpc176x_timer_get_timer_value (const lpc176x_timer_number tnumber)
	Gets the timer value.
rtems_status_code	lpc176x_timer_set_timer_value (const lpc176x_timer_number tnumber, const uint32_t timer_value)
	Sets the timer value.
void	lpc176x_timer_isr (void *arg)
	Timer generic isroutine.
rtems_status_code	lpc176x_timer_init (const lpc176x_timer_number tnumber)
	Initializes timer in timer mode and resets counter but without starting it, and without any capture or match function.
rtems_status_code	lpc176x_timer_init_with_interrupt (const lpc176x_timer_number tnumber, const lpc176x_isr_funct_vector *const vector)
	Initializes timer in timer mode and resets counter but without starting it, and without any capture or match function.

Variables
const lpc176x_timer	timers [LPC176X_TIMER_COUNT]
	Represents all the timers.
lpc176x_timer_functions	functions_vector [LPC176X_TIMER_COUNT]
	Represents all the functions according to the timers.

Detailed Description

Timer controller for the mbed lpc1768 board.

Function Documentation

lpc176x_timer_capture_config()

rtems_status_code lpc176x_timer_capture_config ( lpc176x_timer_number  tnumber, lpc176x_capture_port  capture_port, lpc176x_capture_function  function  )

inline

Configures the capture ports.

Parameters

tnumber	the device to be modified
capture_port	which port of this timer will be setted
function	At which edge/s will the capture work, and if it will interrupt

lpc176x_timer_external_match_config()

rtems_status_code lpc176x_timer_external_match_config ( lpc176x_timer_number  tnumber, lpc176x_match_port  match_port, lpc176x_ext_match_function  function  )

inline

Configures the external match ports.

Parameters

tnumber	the device to be modified
match_port	which match for this timer
function	what should do when match: set, clear toggle or nothing

lpc176x_timer_get_capvalue()

uint32_t lpc176x_timer_get_capvalue ( lpc176x_timer_number  tnumber, lpc176x_capture_port  capnumber  )

inline

Gets the captured value.

Parameters

tnumber	the device to be modified
capnumber	which capture port for this timer

Returns

the captured value

lpc176x_timer_get_timer_value()

uint32_t lpc176x_timer_get_timer_value ( lpc176x_timer_number  tnumber )

inline

Gets the timer value.

Parameters

tnumber

the device

Returns

the timer value

lpc176x_timer_init()

rtems_status_code lpc176x_timer_init

(

lpc176x_timer_number

tnumber

)

Initializes timer in timer mode and resets counter but without starting it, and without any capture or match function.

Parameters

tnumber

which timer

Returns

RTEMS_SUCCESSFUL when everything ok.

lpc176x_timer_init_with_interrupt()

rtems_status_code lpc176x_timer_init_with_interrupt	(	lpc176x_timer_number	tnumber,
		const lpc176x_isr_funct_vector *	vector
	)

Initializes timer in timer mode and resets counter but without starting it, and without any capture or match function.

Parameters

tnumber	which timer to init
vector	the functions to be used by the isr.

Returns

RTEMS_SUCCESSFUL when everything ok.

lpc176x_timer_is_started()

rtems_status_code lpc176x_timer_is_started ( lpc176x_timer_number  tnumber, bool *  is_started  )

inline

true if timer is started.

Parameters

tnumber	the timer number to check.
is_started	TRUE if the timer is running.

Returns

RTEMS_SUCCESSFUL if the started timer check was successfuly.

lpc176x_timer_isr()

void lpc176x_timer_isr

(

void *

lpc176x_timer_number

)

Timer generic isroutine.

Parameters

timernumber

the number of timer.

lpc176x_timer_match_config()

rtems_status_code lpc176x_timer_match_config	(	lpc176x_timer_number	tnumber,
		lpc176x_match_port	match_port,
		lpc176x_match_function	function,
		uint32_t	match_value
	)

Configures the timer match.

Parameters

tnumber	the device to be modified
match_port	which port of this timer will be setted
function	what the timer should do when match: stop timer, clear, and/or interrupt
match_value	the value that the timer should match.

Returns

RTEMS_SUCCESSFUL if the timer was configured successfuly.

lpc176x_timer_reset()

rtems_status_code lpc176x_timer_reset ( lpc176x_timer_number  tnumber )

inline

resets timer counter and stops it.

Parameters

tnumber

the device to be reseted

Returns

RTEMS_SUCCESSFUL if the timer was reseted successfuly.

lpc176x_timer_set_mode()

rtems_status_code lpc176x_timer_set_mode ( lpc176x_timer_number  tnumber, lpc176x_timer_mode  mode  )

inline

Sets mode of the timer (timer, counter rising, counter falling or counter both edges)

Parameters

tnumber	the device to be setted
mode	the desired mode

Returns

RTEMS_SUCCESSFUL if the timer's mode was setted successfuly.

lpc176x_timer_set_resolution()

rtems_status_code lpc176x_timer_set_resolution ( lpc176x_timer_number  tnumber, lpc176x_microseconds  resolution  )

inline

sets the resolution in microseconds of the timer

Parameters

tnumber	the device to be modified.
resolution	how many microseconds will mean each timer counter unit.

Returns

RTEMS_SUCCESSFUL if the timer resolution was setted successfuly.

lpc176x_timer_set_timer_value()

rtems_status_code lpc176x_timer_set_timer_value ( lpc176x_timer_number  tnumber, uint32_t  lpc176x_timer_value  )

inline

Sets the timer value.

Parameters

tnumber	the timer to modify.
timer_value	the value to set.

lpc176x_timer_start()

rtems_status_code lpc176x_timer_start ( lpc176x_timer_number  tnumber )

inline

Starts the timer counter.

Parameters

tnumber

the device to be started

Returns

RTEMS_SUCCESSFUL if the timer's was started successfuly.

Variable Documentation

functions_vector

lpc176x_timer_functions functions_vector[LPC176X_TIMER_COUNT]

Initial value:

=
{
  {
    .funct_vector = NULL
  },
  {
    .funct_vector = NULL
  },
  {
    .funct_vector = NULL
  },
  {
    .funct_vector = NULL
  }
}

Represents all the functions according to the timers.

timers

const lpc176x_timer timers[LPC176X_TIMER_COUNT]

Initial value:

=
{
  {
    .device = (lpc176x_timer_device *) LPC176X_TMR0_BASE_ADDR,
    .module = LPC176X_MODULE_TIMER_0,
    .pinselcap = LPC176X_TIMER0_CAPTURE_PORTS,
    .pinselemat = LPC176X_TIMER0_EMATCH_PORTS,
  },
  {
    .device = (lpc176x_timer_device *) LPC176X_TMR1_BASE_ADDR,
    .module = LPC176X_MODULE_TIMER_1,
    .pinselcap = LPC176X_TIMER1_CAPTURE_PORTS,
    .pinselemat = LPC176X_TIMER1_EMATCH_PORTS,
  },
  {
    .device = (lpc176x_timer_device *) LPC176X_TMR2_BASE_ADDR,
    .module = LPC176X_MODULE_TIMER_2,
    .pinselcap = LPC176X_TIMER2_CAPTURE_PORTS,
    .pinselemat = LPC176X_TIMER2_EMATCH_PORTS,
  },
  {
    .device = (lpc176x_timer_device *) LPC176X_TMR3_BASE_ADDR,
    .module = LPC176X_MODULE_TIMER_3,
    .pinselcap = LPC176X_TIMER3_CAPTURE_PORTS,
    .pinselemat = LPC176X_TIMER3_EMATCH_PORTS,
  }
}

Represents all the timers.