Problem with system time in lpc176x bsp
Marcos Díaz
marcos.diaz at tallertechnologies.com
Mon Jan 11 19:25:06 UTC 2016
Well, we could still use the patch you sent with the protection in is
pending, but I think this will break the BSPs I mentioned, since you
changed timecounter functions signatures. Am I right?
On Mon, Jan 11, 2016 at 4:18 PM, Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:
> Hello,
>
> I already created a ticket which blocks the 4.11 release for this bug:
>
> https://devel.rtems.org/ticket/2502
>
> I sent a new version of the patch to one of your previous threads some
> days ago:
>
> https://lists.rtems.org/pipermail/devel/2016-January/013289.html
>
> There is still a bug in it, since we must disable interrupts in the is
> pending function, but the general approach should work.
>
> ----- Am 11. Jan 2016 um 20:05 schrieb Marcos Díaz
> marcos.diaz at tallertechnologies.com:
>
> > I made a fast search:
> > These BSPs use *rtems_timecounter_simple_downcounter*:
> > arm/shared/armv7m
> > m68k/mcf52235
> > m68k/mcf5225x
> > m68k/mcf5329
> > m68k/uC5282
> > powerpc/mpc55xxevb
> > sparc/erc32
> > sparc/leon2
> > sparc/leon3
> > sparc/shared
> >
> > These use *rtems_timecounter_simple_upcounter*:
> > powerpc/mpc55xxevb
> > arm/lpc22xx
> >
> > We should search a little more for the other changes but at least these
> > BSPs will be affected. Maybe we should wait Sebastian's opinion, since he
> > suggested the change in timecounter's signatures.
> >
> > On Mon, Jan 11, 2016 at 3:44 PM, Joel Sherrill <joel at rtems.org> wrote:
> >
> >>
> >>
> >> On Mon, Jan 11, 2016 at 12:28 PM, Marcos Díaz <
> >> marcos.diaz at tallertechnologies.com> wrote:
> >>
> >>> I will issue a ticket. But I noticed that in my patch I include changes
> >>> to common code that Sebastian suggested, and this will break any other
> BSP
> >>> that uses rtems timecounter simple downcounter or upcounter, since
> these
> >>> function's signatures changed. Should we update all BSPs? Or make
> changes
> >>> more locally to our BSP? Meanwhile please do not apply the patch I
> sent.
> >>>
> >>>
> >> I would prefer not to ship BSPs with bugs but fixing them comes with
> risks.
> >> So I would lean to the same fix on the master and 4.11 branch fixing it
> >> where it needs to be fixed.
> >>
> >> What BSPs does this change impact?
> >>
> >> --joel
> >>
> >>
> >>>
> >>> On Mon, Jan 11, 2016 at 3:16 PM, Joel Sherrill <joel at rtems.org> wrote:
> >>>
> >>>> At this point, a ticket is needed for anything applied to 4.11 that is
> >>>> not release
> >>>> mechanics related.
> >>>>
> >>>> --joel
> >>>>
> >>>> On Mon, Jan 11, 2016 at 11:47 AM, Marcos Diaz <
> >>>> marcos.diaz at tallertechnologies.com> wrote:
> >>>>
> >>>>> Hi Sebastian,
> >>>>>
> >>>>> we did some more testing and found out what's causing the problem.
> >>>>> Based on what
> >>>>> I posted at
> >>>>> https://lists.rtems.org/pipermail/devel/2015-December/013235.html,
> >>>>> the problem arises when the ticker interrupt occurs while a task is
> >>>>> executing
> >>>>> one of the instructions that make up the following line:
> >>>>>
> >>>>> is_count_pending = (systick->csr & ARMV7M_SYSTICK_CSR_COUNTFLAG) !=
> 0;
> >>>>>
> >>>>> which compiling with -O3 are:
> >>>>>
> >>>>> ldr.w r3, [r9]
> >>>>> ubfx r5, r3, #16, #1
> >>>>> strb.w r5, [r8, #64]
> >>>>>
> >>>>> If the SysTick counts to 0 and the ldr executes before the interrupt
> >>>>> occurs,
> >>>>> R3 will have the CSR.COUNTFLAG bit set. Even though
> _ARMV7M_TC_at_tick
> >>>>> will
> >>>>> clear the is_count_pending boolean, the task will still see it as
> true.
> >>>>>
> >>>>> The solution we found is to simply disable interrupts while reading
> >>>>> that flag.
> >>>>> We also use a local variable inside _ARMV7M_TC_is_pending instead of
> >>>>> directly
> >>>>> returning the current value of the is_count_pending global, just in
> >>>>> case.
> >>>>>
> >>>>> Here's the patch that fixes it; this applies to the 4.11 branch.
> >>>>> Do we have to open a new thread for it to be applied to the mainline,
> >>>>> or will
> >>>>> this suffice? Should we open a ticket for 4.11?
> >>>>>
> >>>>> ---
> >>>>> .../arm/shared/armv7m/clock/armv7m-clock-config.c | 38
> >>>>> +++++++++++++++-------
> >>>>> c/src/lib/libbsp/shared/clockdrv_shell.h | 16 ++++++++-
> >>>>> cpukit/rtems/src/clocktick.c | 6 +++-
> >>>>> cpukit/sapi/include/rtems/timecounter.h | 35
> >>>>> ++++++++++++++++----
> >>>>> cpukit/score/include/rtems/score/timecounter.h | 37
> >>>>> +++++++++++++++++++--
> >>>>> cpukit/score/src/kern_tc.c | 16 ++++-----
> >>>>> doc/bsp_howto/clock.t | 13 +++++++-
> >>>>> 7 files changed, 130 insertions(+), 31 deletions(-)
> >>>>>
> >>>>> diff --git
> >>>>> a/c/src/lib/libbsp/arm/shared/armv7m/clock/armv7m-clock-config.c
> >>>>> b/c/src/lib/libbsp/arm/shared/armv7m/clock/armv7m-clock-config.c
> >>>>> index e78684c..53bd7cf 100644
> >>>>> --- a/c/src/lib/libbsp/arm/shared/armv7m/clock/armv7m-clock-config.c
> >>>>> +++ b/c/src/lib/libbsp/arm/shared/armv7m/clock/armv7m-clock-config.c
> >>>>> @@ -25,6 +25,8 @@ static void Clock_isr(void *arg);
> >>>>>
> >>>>> static rtems_timecounter_simple _ARMV7M_TC;
> >>>>>
> >>>>> +static bool is_count_pending = false;
> >>>>> +
> >>>>> static uint32_t _ARMV7M_TC_get(rtems_timecounter_simple *tc)
> >>>>> {
> >>>>> volatile ARMV7M_Systick *systick = _ARMV7M_Systick;
> >>>>> @@ -34,9 +36,20 @@ static uint32_t
> >>>>> _ARMV7M_TC_get(rtems_timecounter_simple *tc)
> >>>>>
> >>>>> static bool _ARMV7M_TC_is_pending(rtems_timecounter_simple *tc)
> >>>>> {
> >>>>> - volatile ARMV7M_SCB *scb = _ARMV7M_SCB;
> >>>>> + volatile ARMV7M_Systick *systick = _ARMV7M_Systick;
> >>>>> + ISR_lock_Context lock_context;
> >>>>> +
> >>>>> + _Timecounter_Acquire( &lock_context );
> >>>>> + /* We use this bool since the hardware flag is reset each time it
> is
> >>>>> read. */
> >>>>> + if (!is_count_pending)
> >>>>> + {
> >>>>> + is_count_pending = ((systick->csr &
> ARMV7M_SYSTICK_CSR_COUNTFLAG)
> >>>>> != 0 );
> >>>>> + }
> >>>>>
> >>>>> - return ((scb->icsr & ARMV7M_SCB_ICSR_PENDSTSET) != 0);
> >>>>> + const bool is_pending_local = is_count_pending;
> >>>>> +
> >>>>> + _Timecounter_Release( &lock_context );
> >>>>> + return is_pending_local;
> >>>>> }
> >>>>>
> >>>>> static uint32_t _ARMV7M_TC_get_timecount(struct timecounter *tc)
> >>>>> @@ -48,19 +61,23 @@ static uint32_t _ARMV7M_TC_get_timecount(struct
> >>>>> timecounter *tc)
> >>>>> );
> >>>>> }
> >>>>>
> >>>>> -static void _ARMV7M_TC_tick(void)
> >>>>> -{
> >>>>> - rtems_timecounter_simple_downcounter_tick(&_ARMV7M_TC,
> >>>>> _ARMV7M_TC_get);
> >>>>> -}
> >>>>> -
> >>>>> -static void _ARMV7M_Systick_at_tick(void)
> >>>>> +static void _ARMV7M_TC_at_tick(rtems_timecounter_simple *tc)
> >>>>> {
> >>>>> volatile ARMV7M_Systick *systick = _ARMV7M_Systick;
> >>>>> -
> >>>>> + is_count_pending = false;
> >>>>> /* Clear COUNTFLAG */
> >>>>> systick->csr;
> >>>>> }
> >>>>>
> >>>>> +static void _ARMV7M_TC_tick(void)
> >>>>> +{
> >>>>> + rtems_timecounter_simple_downcounter_tick(
> >>>>> + &_ARMV7M_TC,
> >>>>> + _ARMV7M_TC_get,
> >>>>> + _ARMV7M_TC_at_tick
> >>>>> + );
> >>>>> +}
> >>>>> +
> >>>>> static void _ARMV7M_Systick_handler(void)
> >>>>> {
> >>>>> _ARMV7M_Interrupt_service_enter();
> >>>>> @@ -111,9 +128,6 @@ static void _ARMV7M_Systick_cleanup(void)
> >>>>>
> >>>>> #define Clock_driver_timecounter_tick() _ARMV7M_TC_tick()
> >>>>>
> >>>>> -#define Clock_driver_support_at_tick() \
> >>>>> - _ARMV7M_Systick_at_tick()
> >>>>> -
> >>>>> #define Clock_driver_support_initialize_hardware() \
> >>>>> _ARMV7M_Systick_initialize()
> >>>>>
> >>>>> diff --git a/c/src/lib/libbsp/shared/clockdrv_shell.h
> >>>>> b/c/src/lib/libbsp/shared/clockdrv_shell.h
> >>>>> index d546fb8..96b962f 100644
> >>>>> --- a/c/src/lib/libbsp/shared/clockdrv_shell.h
> >>>>> +++ b/c/src/lib/libbsp/shared/clockdrv_shell.h
> >>>>> @@ -44,6 +44,13 @@
> >>>>> #define Clock_driver_support_find_timer()
> >>>>> #endif
> >>>>>
> >>>>> +/**
> >>>>> + * @brief Do nothing by default.
> >>>>> + */
> >>>>> +#ifndef Clock_driver_support_at_tick
> >>>>> + #define Clock_driver_support_at_tick()
> >>>>> +#endif
> >>>>> +
> >>>>> /*
> >>>>> * A specialized clock driver may use for example
> >>>>> rtems_timecounter_tick_simple()
> >>>>> * instead of the default.
> >>>>> @@ -108,7 +115,14 @@ rtems_isr Clock_isr(
> >>>>> && _Thread_Executing->Start.entry_point
> >>>>> == (Thread_Entry) rtems_configuration_get_idle_task()
> >>>>> ) {
> >>>>> - _Timecounter_Tick_simple(interval,
> >>>>> (*tc->tc_get_timecount)(tc));
> >>>>> + ISR_lock_Context lock_context;
> >>>>> +
> >>>>> + _Timecounter_Acquire(&lock_context);
> >>>>> + _Timecounter_Tick_simple(
> >>>>> + interval,
> >>>>> + (*tc->tc_get_timecount)(tc),
> >>>>> + &lock_context
> >>>>> + );
> >>>>> }
> >>>>>
> >>>>> Clock_driver_support_at_tick();
> >>>>> diff --git a/cpukit/rtems/src/clocktick.c
> b/cpukit/rtems/src/clocktick.c
> >>>>> index e2cd35f..a6bf26d 100644
> >>>>> --- a/cpukit/rtems/src/clocktick.c
> >>>>> +++ b/cpukit/rtems/src/clocktick.c
> >>>>> @@ -23,9 +23,13 @@
> >>>>>
> >>>>> rtems_status_code rtems_clock_tick( void )
> >>>>> {
> >>>>> + ISR_lock_Context lock_context;
> >>>>> +
> >>>>> + _Timecounter_Acquire( &lock_context );
> >>>>> _Timecounter_Tick_simple(
> >>>>> rtems_configuration_get_microseconds_per_tick(),
> >>>>> - 0
> >>>>> + 0,
> >>>>> + &lock_context
> >>>>> );
> >>>>>
> >>>>> return RTEMS_SUCCESSFUL;
> >>>>> diff --git a/cpukit/sapi/include/rtems/timecounter.h
> >>>>> b/cpukit/sapi/include/rtems/timecounter.h
> >>>>> index 04bc534..06b3973 100644
> >>>>> --- a/cpukit/sapi/include/rtems/timecounter.h
> >>>>> +++ b/cpukit/sapi/include/rtems/timecounter.h
> >>>>> @@ -94,6 +94,13 @@ typedef struct {
> >>>>> } rtems_timecounter_simple;
> >>>>>
> >>>>> /**
> >>>>> + * @brief At tick handling done under protection of the timecounter
> >>>>> lock.
> >>>>> + */
> >>>>> +typedef uint32_t rtems_timecounter_simple_at_tick(
> >>>>> + rtems_timecounter_simple *tc
> >>>>> +);
> >>>>> +
> >>>>> +/**
> >>>>> * @brief Returns the current value of a simple timecounter.
> >>>>> */
> >>>>> typedef uint32_t rtems_timecounter_simple_get(
> >>>>> @@ -199,20 +206,28 @@ RTEMS_INLINE_ROUTINE uint32_t
> >>>>> rtems_timecounter_simple_scale(
> >>>>> *
> >>>>> * @param[in] tc The simple timecounter.
> >>>>> * @param[in] get The method to get the value of the simple
> >>>>> timecounter.
> >>>>> + * @param[in] at_tick The method to perform work under timecounter
> lock
> >>>>> + * protection at this tick, e.g. clear a pending flag.
> >>>>> */
> >>>>> RTEMS_INLINE_ROUTINE void rtems_timecounter_simple_downcounter_tick(
> >>>>> - rtems_timecounter_simple *tc,
> >>>>> - rtems_timecounter_simple_get get
> >>>>> + rtems_timecounter_simple *tc,
> >>>>> + rtems_timecounter_simple_get get,
> >>>>> + rtems_timecounter_simple_at_tick at_tick
> >>>>> )
> >>>>> {
> >>>>> + ISR_lock_Context lock_context;
> >>>>> uint32_t current;
> >>>>>
> >>>>> + _Timecounter_Acquire( &lock_context );
> >>>>> +
> >>>>> + ( *at_tick )( tc );
> >>>>> +
> >>>>> current = rtems_timecounter_simple_scale(
> >>>>> tc,
> >>>>> tc->real_interval - ( *get )( tc )
> >>>>> );
> >>>>>
> >>>>> - _Timecounter_Tick_simple( tc->binary_interval, current );
> >>>>> + _Timecounter_Tick_simple( tc->binary_interval, current,
> >>>>> &lock_context );
> >>>>> }
> >>>>>
> >>>>> /**
> >>>>> @@ -220,17 +235,25 @@ RTEMS_INLINE_ROUTINE void
> >>>>> rtems_timecounter_simple_downcounter_tick(
> >>>>> *
> >>>>> * @param[in] tc The simple timecounter.
> >>>>> * @param[in] get The method to get the value of the simple
> >>>>> timecounter.
> >>>>> + * @param[in] at_tick The method to perform work under timecounter
> lock
> >>>>> + * protection at this tick, e.g. clear a pending flag.
> >>>>> */
> >>>>> RTEMS_INLINE_ROUTINE void rtems_timecounter_simple_upcounter_tick(
> >>>>> - rtems_timecounter_simple *tc,
> >>>>> - rtems_timecounter_simple_get get
> >>>>> + rtems_timecounter_simple *tc,
> >>>>> + rtems_timecounter_simple_get get,
> >>>>> + rtems_timecounter_simple_at_tick at_tick
> >>>>> )
> >>>>> {
> >>>>> + ISR_lock_Context lock_context;
> >>>>> uint32_t current;
> >>>>>
> >>>>> + _Timecounter_Acquire( &lock_context );
> >>>>> +
> >>>>> + ( *at_tick )( tc );
> >>>>> +
> >>>>> current = rtems_timecounter_simple_scale( tc, ( *get )( tc ) );
> >>>>>
> >>>>> - _Timecounter_Tick_simple( tc->binary_interval, current );
> >>>>> + _Timecounter_Tick_simple( tc->binary_interval, current,
> >>>>> &lock_context );
> >>>>> }
> >>>>>
> >>>>> /**
> >>>>> diff --git a/cpukit/score/include/rtems/score/timecounter.h
> >>>>> b/cpukit/score/include/rtems/score/timecounter.h
> >>>>> index 0d17cc7..0e611b5 100644
> >>>>> --- a/cpukit/score/include/rtems/score/timecounter.h
> >>>>> +++ b/cpukit/score/include/rtems/score/timecounter.h
> >>>>> @@ -26,6 +26,8 @@
> >>>>> #include <sys/time.h>
> >>>>> #include <sys/timetc.h>
> >>>>>
> >>>>> +#include <rtems/score/isrlock.h>
> >>>>> +
> >>>>> #ifdef __cplusplus
> >>>>> extern "C" {
> >>>>> #endif /* __cplusplus */
> >>>>> @@ -161,6 +163,31 @@ void _Timecounter_Install( struct timecounter
> *tc
> >>>>> );
> >>>>> void _Timecounter_Tick( void );
> >>>>>
> >>>>> /**
> >>>>> + * @brief Lock to protect the timecounter mechanic.
> >>>>> + */
> >>>>> +ISR_LOCK_DECLARE( extern, _Timecounter_Lock )
> >>>>> +
> >>>>> +/**
> >>>>> + * @brief Acquires the timecounter lock.
> >>>>> + *
> >>>>> + * @param[in] lock_context The lock context.
> >>>>> + *
> >>>>> + * See _Timecounter_Tick_simple().
> >>>>> + */
> >>>>> +#define _Timecounter_Acquire( lock_context ) \
> >>>>> + _ISR_lock_ISR_disable_and_acquire( &_Timecounter_Lock,
> lock_context )
> >>>>> +
> >>>>> +/**
> >>>>> + * @brief Releases the timecounter lock.
> >>>>> + *
> >>>>> + * @param[in] lock_context The lock context.
> >>>>> + *
> >>>>> + * See _Timecounter_Tick_simple().
> >>>>> + */
> >>>>> +#define _Timecounter_Release(lock_context) \
> >>>>> + _ISR_lock_Release_and_ISR_enable(&_Timecounter_Lock, lock_context)
> >>>>> +
> >>>>> +/**
> >>>>> * @brief Performs a simple timecounter tick.
> >>>>> *
> >>>>> * This is a special purpose tick function for simple timecounter to
> >>>>> support
> >>>>> @@ -169,8 +196,14 @@ void _Timecounter_Tick( void );
> >>>>> * @param[in] delta The time in timecounter ticks elapsed since the
> >>>>> last call
> >>>>> * to _Timecounter_Tick_simple().
> >>>>> * @param[in] offset The current value of the timecounter.
> >>>>> - */
> >>>>> -void _Timecounter_Tick_simple( uint32_t delta, uint32_t offset );
> >>>>> + * @param[in] lock_context The lock context of the corresponding
> >>>>> + * _Timecounter_Acquire().
> >>>>> + */
> >>>>> +void _Timecounter_Tick_simple(
> >>>>> + uint32_t delta,
> >>>>> + uint32_t offset,
> >>>>> + ISR_lock_Context *lock_context
> >>>>> +);
> >>>>>
> >>>>> /**
> >>>>> * @brief The wall clock time in seconds.
> >>>>> diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c
> >>>>> index f6a1136..4257533 100644
> >>>>> --- a/cpukit/score/src/kern_tc.c
> >>>>> +++ b/cpukit/score/src/kern_tc.c
> >>>>> @@ -64,7 +64,9 @@ __FBSDID("$FreeBSD r284178 2015-06-09T11:49:56Z$");
> >>>>> #ifdef __rtems__
> >>>>> #include <limits.h>
> >>>>> #include <rtems.h>
> >>>>> -ISR_LOCK_DEFINE(static, _Timecounter_Lock, "Timecounter");
> >>>>> +ISR_LOCK_DEFINE(, _Timecounter_Lock, "Timecounter")
> >>>>> +#define _Timecounter_Release(lock_context) \
> >>>>> + _ISR_lock_Release_and_ISR_enable(&_Timecounter_Lock, lock_context)
> >>>>> #define hz rtems_clock_get_ticks_per_second()
> >>>>> #define printf(...)
> >>>>> #define log(...)
> >>>>> @@ -1383,7 +1385,7 @@ tc_windup(void)
> >>>>> #ifdef __rtems__
> >>>>> ISR_lock_Context lock_context;
> >>>>>
> >>>>> - _ISR_lock_ISR_disable_and_acquire(&_Timecounter_Lock,
> >>>>> &lock_context);
> >>>>> + _Timecounter_Acquire(&lock_context);
> >>>>> #endif /* __rtems__ */
> >>>>>
> >>>>> /*
> >>>>> @@ -1538,7 +1540,7 @@ tc_windup(void)
> >>>>> timekeep_push_vdso();
> >>>>> #endif /* __rtems__ */
> >>>>> #ifdef __rtems__
> >>>>> - _ISR_lock_Release_and_ISR_enable(&_Timecounter_Lock,
> >>>>> &lock_context);
> >>>>> + _Timecounter_Release(&lock_context);
> >>>>> #endif /* __rtems__ */
> >>>>> }
> >>>>>
> >>>>> @@ -1963,14 +1965,12 @@ _Timecounter_Tick(void)
> >>>>> }
> >>>>> #ifdef __rtems__
> >>>>> void
> >>>>> -_Timecounter_Tick_simple(uint32_t delta, uint32_t offset)
> >>>>> +_Timecounter_Tick_simple(uint32_t delta, uint32_t offset,
> >>>>> + ISR_lock_Context *lock_context)
> >>>>> {
> >>>>> struct bintime bt;
> >>>>> struct timehands *th;
> >>>>> uint32_t ogen;
> >>>>> - ISR_lock_Context lock_context;
> >>>>> -
> >>>>> - _ISR_lock_ISR_disable_and_acquire(&_Timecounter_Lock,
> >>>>> &lock_context);
> >>>>>
> >>>>> th = timehands;
> >>>>> ogen = th->th_generation;
> >>>>> @@ -1997,7 +1997,7 @@ _Timecounter_Tick_simple(uint32_t delta,
> uint32_t
> >>>>> offset)
> >>>>> time_second = th->th_microtime.tv_sec;
> >>>>> time_uptime = th->th_offset.sec;
> >>>>>
> >>>>> - _ISR_lock_Release_and_ISR_enable(&_Timecounter_Lock,
> >>>>> &lock_context);
> >>>>> + _Timecounter_Release(lock_context);
> >>>>>
> >>>>> _Watchdog_Tick();
> >>>>> }
> >>>>> diff --git a/doc/bsp_howto/clock.t b/doc/bsp_howto/clock.t
> >>>>> index f58b898..2891bb2 100644
> >>>>> --- a/doc/bsp_howto/clock.t
> >>>>> +++ b/doc/bsp_howto/clock.t
> >>>>> @@ -89,6 +89,13 @@ static uint32_t some_tc_get(
> >>>>> rtems_timecounter_simple *tc )
> >>>>> return some.counter;
> >>>>> @}
> >>>>>
> >>>>> +static void some_tc_at_tick( rtems_timecounter_simple *tc )
> >>>>> +@{
> >>>>> + /*
> >>>>> + * Do work necessary at the clock tick interrupt, e.g. clear a
> >>>>> pending flag.
> >>>>> + */
> >>>>> +@}
> >>>>> +
> >>>>> static bool some_tc_is_pending( rtems_timecounter_simple *tc )
> >>>>> @{
> >>>>> return some.is_pending;
> >>>>> @@ -105,7 +112,11 @@ static uint32_t some_tc_get_timecount( struct
> >>>>> timecounter *tc )
> >>>>>
> >>>>> static void some_tc_tick( void )
> >>>>> @{
> >>>>> - rtems_timecounter_simple_downcounter_tick( &some_tc, some_tc_get
> );
> >>>>> + rtems_timecounter_simple_downcounter_tick(
> >>>>> + &some_tc,
> >>>>> + some_tc_get,
> >>>>> + some_tc_at_tick
> >>>>> + );
> >>>>> @}
> >>>>>
> >>>>> static void some_support_initialize_hardware( void )
> >>>>> --
> >>>>> 2.7.0
> >>>>>
> >>>>> _______________________________________________
> >>>>> devel mailing list
> >>>>> devel at rtems.org
> >>>>> http://lists.rtems.org/mailman/listinfo/devel
> >>>>>
> >>>>
> >>>>
> >>>
> >>>
> >>> --
> >>>
> >>> ______________________________
> >>>
> >>> <http://www.tallertechnologies.com>
> >>>
> >>>
> >>> Marcos Díaz
> >>>
> >>> Software Engineer
> >>>
> >>>
> >>> San Lorenzo 47, 3rd Floor, Office 5
> >>>
> >>> Córdoba, Argentina
> >>>
> >>>
> >>> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
> >>>
> >>> Skype: markdiaz22
> >>>
> >>>
> >>
> >
> >
> > --
> >
> > ______________________________
> >
> > <http://www.tallertechnologies.com>
> >
> >
> > Marcos Díaz
> >
> > Software Engineer
> >
> >
> > San Lorenzo 47, 3rd Floor, Office 5
> >
> > Córdoba, Argentina
> >
> >
> > Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
> >
> > Skype: markdiaz22
>
--
______________________________
<http://www.tallertechnologies.com>
Marcos Díaz
Software Engineer
San Lorenzo 47, 3rd Floor, Office 5
Córdoba, Argentina
Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
Skype: markdiaz22
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