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Add debug instrumentation

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3998 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-09-29 17:49:36 +00:00
parent ae55286143
commit a1d08a2ad2
1 changed files with 47 additions and 9 deletions
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56
arch/sim/src/up_touchscreen.c
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@ -65,6 +65,14 @@
****************************************************************************/
/* Configuration ************************************************************/
#ifdef CONFIG_DISABLE_POLL
# undef CONFIG_SIM_TCNWAITERS
#else
# ifndef CONFIG_SIM_TCNWAITERS
# define CONFIG_SIM_TCNWAITERS 4
# endif
#endif
/* Driver support ***********************************************************/
/* This format is used to construct the /dev/input[n] device driver path. It
* defined here so that it will be used consistently in all places.
@ -101,10 +109,10 @@ struct up_sample_s
struct up_dev_s
{
uint8_t nwaiters; /* Number of threads waiting for touchscreen data */
volatile uint8_t nwaiters; /* Number of threads waiting for touchscreen data */
uint8_t id; /* Current touch point ID */
uint8_t minor; /* Minor device number */
bool penchange; /* An unreported event is buffered */
volatile bool penchange; /* An unreported event is buffered */
sem_t devsem; /* Manages exclusive access to this structure */
sem_t waitsem; /* Used to wait for the availability of data */
@ -116,7 +124,7 @@ struct up_dev_s
*/
#ifndef CONFIG_DISABLE_POLL
struct pollfd *fds[CONFIG_touchscreen_NPOLLWAITERS];
struct pollfd *fds[CONFIG_SIM_TCNWAITERS];
#endif
};
@ -183,6 +191,7 @@ static void up_notify(FAR struct up_dev_s *priv)
* that the read data is available.
*/
ivdbg("contact=%d nwaiters=%d\n", priv->sample.contact, priv->nwaiters);
if (priv->nwaiters > 0)
{
/* After posting this semaphore, we need to exit because the touchscreen
@ -199,7 +208,7 @@ static void up_notify(FAR struct up_dev_s *priv)
*/
#ifndef CONFIG_DISABLE_POLL
for (i = 0; i < CONFIG_touchscreen_NPOLLWAITERS; i++)
for (i = 0; i < CONFIG_SIM_TCNWAITERS; i++)
{
struct pollfd *fds = priv->fds[i];
if (fds)
@ -223,6 +232,9 @@ static int up_sample(FAR struct up_dev_s *priv,
/* Is there new touchscreen sample data available? */
ivdbg("penchange=%d contact=%d id=%d\n",
priv->penchange, sample->contact, priv->id);
if (priv->penchange)
{
/* Yes.. the state has changed in some way. Return a copy of the
@ -248,6 +260,9 @@ static int up_sample(FAR struct up_dev_s *priv,
}
priv->penchange = false;
ivdbg("penchange=%d contact=%d id=%d\n",
priv->penchange, priv->sample.contact, priv->id);
ret = OK;
}
@ -289,10 +304,12 @@ static int up_waitsample(FAR struct up_dev_s *priv,
while (up_sample(priv, sample) < 0)
{
/* Wait for a change in the touchscreen state */
ivdbg("Waiting...\n");
priv->nwaiters++;
ret = sem_wait(&priv->waitsem);
priv->nwaiters--;
ivdbg("Awakened...\n");
if (ret < 0)
{
@ -337,6 +354,7 @@ errout:
static int up_open(FAR struct file *filep)
{
ivdbg("Opening...\n");
return OK;
}
@ -346,6 +364,7 @@ static int up_open(FAR struct file *filep)
static int up_close(FAR struct file *filep)
{
ivdbg("Closing...\n");
return OK;
}
@ -361,6 +380,8 @@ static ssize_t up_read(FAR struct file *filep, FAR char *buffer, size_t len)
struct up_sample_s sample;
int ret;
ivdbg("len=%d\n", len);
DEBUGASSERT(filep);
inode = filep->f_inode;
@ -454,6 +475,7 @@ static ssize_t up_read(FAR struct file *filep, FAR char *buffer, size_t len)
ret = SIZEOF_TOUCH_SAMPLE_S(1);
errout:
ivdbg("Returning %d\n", ret);
sem_post(&priv->devsem);
return ret;
}
@ -546,7 +568,7 @@ static int up_poll(FAR struct file *filep, FAR struct pollfd *fds,
* slot for the poll structure reference
*/
for (i = 0; i < CONFIG_touchscreen_NPOLLWAITERS; i++)
for (i = 0; i < CONFIG_SIM_TCNWAITERS; i++)
{
/* Find an available slot */
@ -560,7 +582,7 @@ static int up_poll(FAR struct file *filep, FAR struct pollfd *fds,
}
}
if (i >= CONFIG_touchscreen_NPOLLWAITERS)
if (i >= CONFIG_SIM_TCNWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
@ -736,6 +758,7 @@ int up_tcenter(int x, int y, int buttons)
bool pendown; /* true: pen is down */
ivdbg("x=%d y=%d buttons=%02x\n", x, y, buttons);
ivdbg("contact=%d nwaiters=%d\n", priv->sample.contact, priv->nwaiters);
/* Any button press will count as pendown. */
@ -784,7 +807,7 @@ int up_tcenter(int x, int y, int buttons)
priv->sample.id = priv->id;
priv->penchange = true;
/* Notify any waiters that nes touchscreen data is available */
/* Notify any waiters that new touchscreen data is available */
up_notify(priv);
return OK;
@ -799,8 +822,9 @@ int up_tcleave(int x, int y, int buttons)
FAR struct up_dev_s *priv = (FAR struct up_dev_s *)&g_simtouchscreen;
ivdbg("x=%d y=%d buttons=%02x\n", x, y, buttons);
ivdbg("contact=%d nwaiters=%d\n", priv->sample.contact, priv->nwaiters);
/* Treat leaving as penup */
/* Treat leaving the window as penup */
/* Ignore the pen up if the pen was already up (CONTACT_NONE == pen up and
* already reported. CONTACT_UP == pen up, but not reported)
@ -809,6 +833,20 @@ int up_tcleave(int x, int y, int buttons)
if (priv->sample.contact != CONTACT_NONE)
{
priv->sample.contact = CONTACT_UP;
/* Is there a thread waiting for the touchpad event? If so, awaken it! */
if (priv->nwaiters > 0)
{
/* Indicate the availability of new sample data for this ID */
priv->sample.id = priv->id;
priv->penchange = true;
/* Notify any waiters that new touchscreen data is available */
up_notify(priv);
}
}
return OK;
}