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Updated system timer logic from Bob Doiron

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This commit is contained in:
Gregory Nutt
2014-04-30 14:46:26 -06:00
parent 52583de4cf
commit bc162a6c76
1 changed files with 80 additions and 13 deletions
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configs/sam4s-xplained-pro/src/sam_tc.c
+80 -13
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@@ -116,12 +116,27 @@
* Private Functions
****************************************************************************/
#if defined(CONFIG_SYSTEMTICK_EXTCLK) && !defined(CONFIG_SUPPRESS_INTERRUPTS) && \
!defined(CONFIG_SUPPRESS_TIMER_INTS)
static bool systemtick(FAR uint32_t *next_interval_us)
{
sched_process_timer();
return true; // reload, no change to interval
}
#endif /* CONFIG_SYSTEMTICK_EXTCLK && !CONFIG_SUPPRESS_INTERRUPTS && !CONFIG_SUPPRESS_TIMER_INTS */
#if defined(CONFIG_SCHED_CPULOAD) && defined(CONFIG_SCHED_CPULOAD_EXTCLK)
static bool calc_cpuload(FAR uint32_t *next_interval_us)
{
sched_process_cpuload();
return TRUE; /* Reload, no change to interval */
}
#endif /* CONFIG_SCHED_CPULOAD && CONFIG_SCHED_CPULOAD_EXTCLK */
/****************************************************************************
* Public Functions
****************************************************************************/
@@ -141,52 +156,104 @@ int sam_timerinitialize(void)
/* Initialize and register the timer devices */
#if defined(CONFIG_SAM34_TC0)
#if defined(CONFIG_SAM34_TC0)
tcvdbg("Initializing %s...\n", CONFIG_TIMER0_DEVPATH);
sam_tcinitialize(CONFIG_TIMER0_DEVPATH, SAM_IRQ_TC0);
#endif
#if defined(CONFIG_SAM34_TC1)
#if defined(CONFIG_SAM34_TC1)
tcvdbg("Initializing %s...\n", CONFIG_TIMER1_DEVPATH);
sam_tcinitialize(CONFIG_TIMER1_DEVPATH, SAM_IRQ_TC1);
#endif
#if defined(CONFIG_SAM34_TC2)
#if defined(CONFIG_SAM34_TC2)
tcvdbg("Initializing %s...\n", CONFIG_TIMER2_DEVPATH);
sam_tcinitialize(CONFIG_TIMER2_DEVPATH, SAM_IRQ_TC2);
#endif
#if defined(CONFIG_SAM34_TC3)
#if defined(CONFIG_SAM34_TC3)
tcvdbg("Initializing %s...\n", CONFIG_TIMER3_DEVPATH);
sam_tcinitialize(CONFIG_TIMER3_DEVPATH, SAM_IRQ_TC3);
#endif
#if defined(CONFIG_SAM34_TC4)
#if defined(CONFIG_SAM34_TC4)
tcvdbg("Initializing %s...\n", CONFIG_TIMER4_DEVPATH);
sam_tcinitialize(CONFIG_TIMER4_DEVPATH, SAM_IRQ_TC4);
#endif
#if defined(CONFIG_SAM34_TC5)
#if defined(CONFIG_SAM34_TC5)
tcvdbg("Initializing %s...\n", CONFIG_TIMER5_DEVPATH);
sam_tcinitialize(CONFIG_TIMER5_DEVPATH, SAM_IRQ_TC5);
#endif
/* Open the timer device */
#if defined(CONFIG_SYSTEMTICK_EXTCLK) && !defined(CONFIG_SUPPRESS_INTERRUPTS) && \
!defined(CONFIG_SUPPRESS_TIMER_INTS)
/* System Timer Initialization */
#if defined(CONFIG_SCHED_CPULOAD) && defined(CONFIG_SCHED_CPULOAD_EXTCLK)
tcvdbg("Opening.\n");
tcvdbg("Opening %s\n", CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH);
fd = open(CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, O_RDONLY);
fd = open(CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH, O_RDONLY);
if (fd < 0)
{
tcdbg("open %s failed: %d\n", CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, errno);
tcdbg("open %s failed: %d\n",
CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH, errno);
goto errout;
}
/* Set the timeout */
tcvdbg("Timeout = %d.\n", TINTERVAL);
ret = ioctl(fd, TCIOC_SETTIMEOUT, (unsigned long)1000000 / CONFIG_SCHED_CPULOAD_TICKSPERSEC);
tcvdbg("Interval = %d us.\n", (unsigned long)MSEC_PER_TICK * 1000);
ret = ioctl(fd, TCIOC_SETTIMEOUT, (unsigned long)MSEC_PER_TICK * 1000);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_SETTIMEOUT) failed: %d\n", errno);
goto errout_with_dev;
}
/* install user callback */
{
struct timer_capture_s tccb;
tccb.newhandler = systemtick;
tccb.oldhandler = NULL;
ret = ioctl(fd, TCIOC_SETHANDLER, (unsigned long)&tccb);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_SETHANDLER) failed: %d\n", errno);
goto errout_with_dev;
}
}
/* Start the timer */
tcvdbg("Starting.\n");
ret = ioctl(fd, TCIOC_START, 0);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_START) failed: %d\n", errno);
goto errout_with_dev;
}
#endif
#if defined(CONFIG_SCHED_CPULOAD) && defined(CONFIG_SCHED_CPULOAD_EXTCLK)
/* CPU Load initialization */
tcvdbg("Opening %s\n", CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH);
fd = open(CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, O_RDONLY);
if (fd < 0)
{
tcdbg("open %s failed: %d\n",
CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, errno);
goto errout;
}
/* Set the timeout */
tcvdbg("Interval = %d us.\n", (unsigned long)1000000 / CONFIG_SCHED_CPULOAD_TICKSPERSEC);
ret = ioctl(fd, TCIOC_SETTIMEOUT,
(unsigned long)1000000 / CONFIG_SCHED_CPULOAD_TICKSPERSEC);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_SETTIMEOUT) failed: %d\n", errno);