X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=drv%2Ftimer.c;h=bd0ff9daed9ec26bfe5ae35ff5266917b72329b1;hb=HEAD;hp=0fe4d2c22c270e2b3743fa6d1a02c26a1378fb6f;hpb=76c53bfa0136be55cf17e57b1ee098e5dfeefa70;p=bertos.git diff --git a/drv/timer.c b/drv/timer.c deleted file mode 100755 index 0fe4d2c2..00000000 --- a/drv/timer.c +++ /dev/null @@ -1,399 +0,0 @@ -/*! - * \file - * - * - * \brief Hardware independent timer driver (implementation) - * - * \version $Id$ - * \author Bernardo Innocenti - */ - -/*#* - *#* $Log$ - *#* Revision 1.26 2005/11/04 16:20:02 bernie - *#* Fix reference to README.devlib in header. - *#* - *#* Revision 1.25 2005/07/19 07:26:37 bernie - *#* Refactor to decouple timer ticks from milliseconds. - *#* - *#* Revision 1.24 2005/04/11 19:10:28 bernie - *#* Include top-level headers from cfg/ subdir. - *#* - *#* Revision 1.23 2004/12/13 12:07:06 bernie - *#* DISABLE_IRQSAVE/ENABLE_IRQRESTORE: Convert to IRQ_SAVE_DISABLE/IRQ_RESTORE. - *#* - *#* Revision 1.22 2004/12/08 09:12:09 bernie - *#* Rename time_t to mtime_t. - *#* - *#* Revision 1.21 2004/11/28 23:20:25 bernie - *#* Remove obsolete INITLIST macro. - *#* - *#* Revision 1.20 2004/11/16 20:59:06 bernie - *#* Add watchdog timer support. - *#*/ - -#include "timer.h" -#include -#include -#include -#include - -#include CPU_CSOURCE(timer) - -/* - * Sanity check for config parameters required by this module. - */ -#if !defined(CONFIG_KERNEL) || ((CONFIG_KERNEL != 0) && CONFIG_KERNEL != 1) - #error CONFIG_KERNEL must be set to either 0 or 1 in config.h -#endif -#if !defined(CONFIG_WATCHDOG) || ((CONFIG_WATCHDOG != 0) && CONFIG_WATCHDOG != 1) - #error CONFIG_WATCHDOG must be set to either 0 or 1 in config.h -#endif - -#if CONFIG_WATCHDOG - #include -#endif - -#if CONFIG_KERNEL && CONFIG_KERN_SIGNALS - #include -#endif - - -/*! - * \def CONFIG_TIMER_STROBE - * - * This is a debug facility that can be used to - * monitor timer interrupt activity on an external pin. - * - * To use strobes, redefine the macros TIMER_STROBE_ON, - * TIMER_STROBE_OFF and TIMER_STROBE_INIT and set - * CONFIG_TIMER_STROBE to 1. - */ -#if !defined(CONFIG_TIMER_STROBE) || !CONFIG_TIMER_STROBE - #define TIMER_STROBE_ON do {/*nop*/} while(0) - #define TIMER_STROBE_OFF do {/*nop*/} while(0) - #define TIMER_STROBE_INIT do {/*nop*/} while(0) -#endif - - -//! Master system clock (1 tick accuracy) -volatile ticks_t _clock; - - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - -/*! - * List of active asynchronous timers. - */ -REGISTER static List timers_queue; - - -/*! - * Add the specified timer to the software timer service queue. - * When the delay indicated by the timer expires, the timer - * device will execute the event associated with it. - * - * \note Interrupt safe - */ -void timer_add(Timer *timer) -{ - Timer *node; - cpuflags_t flags; - - - /* Inserting timers twice causes mayhem. */ - ASSERT(timer->magic != TIMER_MAGIC_ACTIVE); - DB(timer->magic = TIMER_MAGIC_ACTIVE;) - - IRQ_SAVE_DISABLE(flags); - - /* Calculate expiration time for this timer */ - timer->tick = _clock + timer->_delay; - - /* - * Search for the first node whose expiration time is - * greater than the timer we want to add. - */ - node = (Timer *)LIST_HEAD(&timers_queue); - while (node->link.succ) - { - /* - * Stop just after the insertion point. - * (this fancy compare takes care of wrap-arounds). - */ - if (node->tick - timer->tick > 0) - break; - - /* Go to next node */ - node = (Timer *)node->link.succ; - } - - /* Enqueue timer request into the list */ - INSERTBEFORE(&timer->link, &node->link); - - IRQ_RESTORE(flags); -} - - -/*! - * Remove a timer from the timer queue before it has expired. - */ -Timer *timer_abort(Timer *timer) -{ - ATOMIC(REMOVE(&timer->link)); - DB(timer->magic = TIMER_MAGIC_INACTIVE;) - - return timer; -} - -#endif /* CONFIG_TIMER_DISABLE_EVENTS */ - - -/*! - * Wait for the specified amount of time (expressed in ms). - */ -void timer_delayTicks(ticks_t delay) -{ -#if defined(IRQ_GETSTATE) - /* We shouldn't sleep with interrupts disabled */ - ASSERT(IRQ_GETSTATE()); -#endif - -#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS - Timer t; - - ASSERT(!sig_check(SIG_SINGLE)); - timer_set_event_signal(&t, proc_current(), SIG_SINGLE); - timer_set_delay(&t, delay); - timer_add(&t); - sig_wait(SIG_SINGLE); - -#else /* !CONFIG_KERN_SIGNALS */ - - ticks_t start = timer_clock(); - - /* Busy wait */ - while (timer_clock() - start < delay) - { -#if CONFIG_WATCHDOG - wdt_reset(); -#endif - } - -#endif /* !CONFIG_KERN_SIGNALS */ -} - - -#ifndef CONFIG_TIMER_DISABLE_UDELAY - -/*! - * Busy wait until the specified amount of high-precision ticks have elapsed. - * - * \note This function is interrupt safe, the only - * requirement is a running hardware timer. - */ -void timer_busyWait(hptime_t delay) -{ - hptime_t now, prev = timer_hw_hpread(); - hptime_t delta; - - for(;;) - { - now = timer_hw_hpread(); - /* - * We rely on hptime_t being unsigned here to - * reduce the modulo to an AND in the common - * case of TIMER_HW_CNT. - */ - delta = (now - prev) % TIMER_HW_CNT; - if (delta >= delay) - break; - delay -= delta; - prev = now; - } -} - -/*! - * Wait for the specified amount of time (expressed in microseconds). - * - * \bug In AVR arch the maximum amount of time that can be used as - * delay could be very limited, depending on the hardware timer - * used. Check timer_avr.h, and what register is used as hptime_t. - */ -void timer_delayHp(hptime_t delay) -{ - if (UNLIKELY(delay > us_to_hptime(1000))) - { - timer_delayTicks(delay / (TIMER_HW_HPTICKS_PER_SEC / TIMER_TICKS_PER_SEC)); - delay %= (TIMER_HW_HPTICKS_PER_SEC / TIMER_TICKS_PER_SEC); - } - - timer_busyWait(delay); -} -#endif /* CONFIG_TIMER_DISABLE_UDELAY */ - - -/*! - * Timer interrupt handler. Find soft timers expired and - * trigger corresponding events. - */ -DEFINE_TIMER_ISR -{ - /* - * With the Metrowerks compiler, the only way to force the compiler generate - * an interrupt service routine is to put a pragma directive within the function - * body. - */ - #ifdef __MWERKS__ - #pragma interrupt saveall - #endif - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - Timer *timer; -#endif - - TIMER_STROBE_ON; - - timer_hw_irq(); - - /* Update the master ms counter */ - ++_clock; - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - /* - * Check the first timer request in the list and process - * it when it has expired. Repeat this check until the - * first node has not yet expired. Since the list is sorted - * by expiry time, all the following requests are guaranteed - * to expire later. - */ - while ((timer = (Timer *)LIST_HEAD(&timers_queue))->link.succ) - { - /* This request in list has not yet expired? */ - if (_clock - timer->tick < 0) - break; - - /* Retreat the expired timer */ - REMOVE(&timer->link); - DB(timer->magic = TIMER_MAGIC_INACTIVE;) - - /* Execute the associated event */ - event_do(&timer->expire); - } -#endif /* CONFIG_TIMER_DISABLE_EVENTS */ - - TIMER_STROBE_OFF; -} - - -/*! - * Initialize timer - */ -void timer_init(void) -{ - TIMER_STROBE_INIT; - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - LIST_INIT(&timers_queue); -#endif - - _clock = 0; - - timer_hw_init(); -} - - -#if CONFIG_TEST - -static void timer_test_constants(void) -{ - kprintf("TIMER_PRESCALER=%d\n", TIMER_PRESCALER); - kprintf("TIMER_HW_HPTICKS_PER_SEC=%lu\n", TIMER_HW_HPTICKS_PER_SEC); - #ifdef TIMER1_OVF_COUNT - kprintf("TIMER1_OVF_COUNT=%d\n", (int)TIMER1_OVF_COUNT); - #endif - kprintf("TIMER_TICKS_PER_MSEC=%d\n", (int)TIMER_TICKS_PER_MSEC); - kprintf("\n"); - kprintf("ms_to_ticks(100)=%lu\n", ms_to_ticks(100)); - kprintf("ms_to_ticks(10000)=%lu\n", ms_to_ticks(10000)); - kprintf("us_to_ticks(100)=%lu\n", us_to_ticks(100)); - kprintf("us_to_ticks(10000)=%lu\n", us_to_ticks(10000)); - kprintf("\n"); - kprintf("ticks_to_ms(100)=%lu\n", ticks_to_ms(100)); - kprintf("ticks_to_ms(10000)=%lu\n", ticks_to_ms(10000)); - kprintf("ticks_to_us(100)=%lu\n", ticks_to_us(100)); - kprintf("ticks_to_us(10000)=%lu\n", ticks_to_us(10000)); - kprintf("\n"); - kprintf("hptime_to_us(100)=%lu\n", hptime_to_us(100)); - kprintf("hptime_to_us(10000)=%lu\n", hptime_to_us(10000)); - kprintf("us_to_hptime(100)=%lu\n", us_to_hptime(100)); - kprintf("us_to_hptime(10000)=%lu\n", us_to_hptime(10000)); -} - -static void timer_test_delay(void) -{ - int i; - - kputs("Delay test\n"); - for (i = 0; i < 1000; i += 100) - { - kprintf("delay %d...", i); - timer_delay(i); - kputs("done\n"); - } -} - -static void timer_test_hook(iptr_t _timer) -{ - Timer *timer = (Timer *)(void *)_timer; - - kprintf("Timer %ld expired\n", ticks_to_ms(timer->_delay)); - timer_add(timer); -} - -static void timer_test_async(void) -{ - static Timer test_timers[5]; - static const mtime_t test_delays[5] = { 170, 50, 310, 1500, 310 }; - size_t i; - - for (i = 0; i < countof(test_timers); ++i) - { - Timer *timer = &test_timers[i]; - timer_setDelay(timer, ms_to_ticks(test_delays[i])); - timer_set_event_softint(timer, timer_test_hook, (iptr_t)timer); - timer_add(timer); - } -} - -static void timer_test_poll(void) -{ - int secs = 0; - mtime_t start_time = ticks_to_ms(timer_clock()); - mtime_t now; - - while (secs <= 10) - { - now = ticks_to_ms(timer_clock()); - if (now - start_time >= 1000) - { - ++secs; - start_time += 1000; - kprintf("seconds = %d, ticks=%ld\n", secs, now); - } - } -} - -void timer_test(void) -{ - timer_test_constants(); - timer_test_delay(); - timer_test_async(); - timer_test_poll(); -} - -#endif /* CONFIG_TEST */