static void ajoy_enable(FAR const struct ajoy_lowerhalf_s *lower,
ajoy_buttonset_t press, ajoy_buttonset_t release,
ajoy_handler_t handler, FAR void *arg)
{
irqstate_t flags;
ajoy_buttonset_t either = press | release;
ajoy_buttonset_t bit;
bool rising;
bool falling;
int i;
/* Start with all interrupts disabled */
flags = enter_critical_section();
ajoy_disable();
iinfo("press: %02x release: %02x handler: %p arg: %p\n",
press, release, handler, arg);
/* If no events are indicated or if no handler is provided, then this
* must really be a request to disable interrupts.
*/
if (either && handler)
{
/* Save the new the handler and argument */
g_ajoyhandler = handler;
g_ajoyarg = arg;
/* Check each GPIO. */
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Enable interrupts on each pin that has either a press or
* release event associated with it.
*/
bit = (1 << i);
if ((either & bit) != 0)
{
/* Active low so a press corresponds to a falling edge and
* a release corresponds to a rising edge.
*/
falling = ((press & bit) != 0);
rising = ((release & bit) != 0);
iinfo("GPIO %d: rising: %d falling: %d\n",
i, rising, falling);
(void)stm32_gpiosetevent(g_joygpio[i], rising, falling,
true, ajoy_interrupt, NULL);
}
}
}
leave_critical_section(flags);
}
static int max11802_open(FAR struct file *filep)
{
#ifdef CONFIG_MAX11802_REFCNT
FAR struct inode *inode;
FAR struct max11802_dev_s *priv;
uint8_t tmp;
int ret;
iinfo("Opening\n");
DEBUGASSERT(filep);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct max11802_dev_s *)inode->i_private;
/* Get exclusive access to the driver data structure */
ret = sem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was canceled by an signal */
DEBUGASSERT(errno == EINTR);
return -EINTR;
}
/* Increment the reference count */
tmp = priv->crefs + 1;
if (tmp == 0)
{
/* More than 255 opens; uint8_t overflows to zero */
ret = -EMFILE;
goto errout_with_sem;
}
/* When the reference increments to 1, this is the first open event
* on the driver.. and an opportunity to do any one-time initialization.
*/
/* Save the new open count on success */
priv->crefs = tmp;
errout_with_sem:
sem_post(&priv->devsem);
return ret;
#else
iinfo("Opening\n");
return OK;
#endif
}
static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
{
/* Attach the ADS7843E interrupt */
iinfo("Attaching %p to IRQ %d\n", isr, SAM_TCS_IRQ);
return irq_attach(SAM_TCS_IRQ, isr, NULL);
}
static uint16_t ads7843e_sendcmd(FAR struct ads7843e_dev_s *priv, uint8_t cmd)
{
uint8_t buffer[2];
uint16_t result;
/* Select the ADS7843E */
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN(0), true);
/* Send the command */
(void)SPI_SEND(priv->spi, cmd);
/* Wait a tiny amount to make sure that the acquisition time is complete */
up_udelay(3); /* 3 microseconds */
/* Read the 12-bit data (LS 4 bits will be padded with zero) */
SPI_RECVBLOCK(priv->spi, buffer, 2);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN(0), false);
result = ((uint16_t)buffer[0] << 8) | (uint16_t)buffer[1];
result = result >> 4;
iinfo("cmd:%02x response:%04x\n", cmd, result);
return result;
}
static uint16_t max11802_sendcmd(FAR struct max11802_dev_s *priv,
uint8_t cmd, int *tags)
{
uint8_t buffer[2];
uint16_t result;
/* Select the MAX11802 */
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
/* Send the command */
(void)SPI_SEND(priv->spi, cmd);
/* Read the data */
SPI_RECVBLOCK(priv->spi, buffer, 2);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
result = ((uint16_t)buffer[0] << 8) | (uint16_t)buffer[1];
*tags = result & 0xF;
result >>= 4; /* Get rid of tags */
iinfo("cmd:%02x response:%04x\n", cmd, result);
return result;
}
static uint16_t tc_adc_read_sample(void)
{
uint16_t retval;
uint32_t adcsr;
uint16_t count = 0;
/* Validate the conversion is complete */
adcsr = tc_adc_getreg(STM32_ADC_SR_OFFSET);
while ((adcsr & ADC_SR_EOC) == 0)
{
adcsr = tc_adc_getreg(STM32_ADC_SR_OFFSET);
count++;
}
/* Read the sample */
retval = tc_adc_getreg(STM32_ADC_DR_OFFSET);
retval &= ADC_DR_DATA_MASK;
if (count > 0)
{
iinfo("Count = %d\n", count);
}
return retval;
}
static bool tsc_pendown(FAR struct ads7843e_config_s *state)
{
/* The /PENIRQ value is active low */
bool pendown = !sam_gpioread(GPIO_TCS_IRQ);
iinfo("pendown:%d\n", pendown);
return pendown;
}
static int tc_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
#if 1
iinfo("cmd: %d arg: %ld\n", cmd, arg);
return -ENOTTY; /* None yet supported */
#else
FAR struct inode *inode;
FAR struct tc_dev_s *priv;
int ret;
iinfo("cmd: %d arg: %ld\n", cmd, arg);
DEBUGASSERT(filep);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct tc_dev_s *)inode->i_private;
/* Get exclusive access to the driver data structure */
ret = nxsem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was canceled by an signal */
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
return ret;
}
/* Process the IOCTL by command */
switch (cmd)
{
/* ADD IOCTL COMMAND CASES HERE */
default:
ret = -ENOTTY;
break;
}
nxsem_post(&priv->devsem);
return ret;
#endif
}
static int max11802_close(FAR struct file *filep)
{
#ifdef CONFIG_MAX11802_REFCNT
FAR struct inode *inode;
FAR struct max11802_dev_s *priv;
int ret;
iinfo("Closing\n");
DEBUGASSERT(filep);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct max11802_dev_s *)inode->i_private;
/* Get exclusive access to the driver data structure */
ret = sem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was canceled by an signal */
DEBUGASSERT(errno == EINTR);
return -EINTR;
}
/* Decrement the reference count unless it would decrement a negative
* value. When the count decrements to zero, there are no further
* open references to the driver.
*/
if (priv->crefs >= 1)
{
priv->crefs--;
}
sem_post(&priv->devsem);
#endif
iinfo("Closing\n");
return OK;
}
static int max11802_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode;
FAR struct max11802_dev_s *priv;
int ret;
iinfo("cmd: %d arg: %ld\n", cmd, arg);
DEBUGASSERT(filep);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct max11802_dev_s *)inode->i_private;
/* Get exclusive access to the driver data structure */
ret = sem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was canceled by an signal */
DEBUGASSERT(errno == EINTR);
return -EINTR;
}
/* Process the IOCTL by command */
switch (cmd)
{
case TSIOC_SETFREQUENCY: /* arg: Pointer to uint32_t frequency value */
{
FAR uint32_t *ptr = (FAR uint32_t *)((uintptr_t)arg);
DEBUGASSERT(priv->config != NULL && ptr != NULL);
priv->config->frequency = SPI_SETFREQUENCY(priv->spi, *ptr);
}
break;
case TSIOC_GETFREQUENCY: /* arg: Pointer to uint32_t frequency value */
{
FAR uint32_t *ptr = (FAR uint32_t *)((uintptr_t)arg);
DEBUGASSERT(priv->config != NULL && ptr != NULL);
*ptr = priv->config->frequency;
}
break;
default:
ret = -ENOTTY;
break;
}
sem_post(&priv->devsem);
return ret;
}
static void ajoy_enable(FAR const struct ajoy_lowerhalf_s *lower,
ajoy_buttonset_t press, ajoy_buttonset_t release,
ajoy_handler_t handler, FAR void *arg)
{
irqstate_t flags;
ajoy_buttonset_t either = press | release;
ajoy_buttonset_t bit;
int i;
/* Start with all interrupts disabled */
flags = enter_critical_section();
ajoy_disable();
iinfo("press: %02x release: %02x handler: %p arg: %p\n",
press, release, handler, arg);
/* If no events are indicated or if no handler is provided, then this
* must really be a request to disable interrupts.
*/
if (either && handler)
{
/* Save the new the handler and argument */
g_ajoyhandler = handler;
g_ajoyarg = arg;
/* Check each GPIO. */
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Enable interrupts on each pin that has either a press or
* release event associated with it.
*/
bit = (1 << i);
if ((either & bit) != 0)
{
/* REVISIT: It would be better if we reconfigured for
* the edges of interest so that we do not get spurious
* interrupts.
*/
sam_pioirqenable(g_joyirq[i]);
}
}
}
leave_critical_section(flags);
}
static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
{
/* Attach and enable, or detach and disable */
iinfo("IRQ:%d enable:%d\n", SAM_TCS_IRQ, enable);
if (enable)
{
sam_gpioirqenable(SAM_TCS_IRQ);
}
else
{
sam_gpioirqdisable(SAM_TCS_IRQ);
}
}
static void tc_notify(FAR struct tc_dev_s *priv)
{
#ifndef CONFIG_DISABLE_POLL
int i;
#endif
/* If no threads have the driver open, then just dump the state */
#ifdef CONFIG_TOUCHSCREEN_REFCNT
if ((priv->crefs == 0) && priv->sample.contact == CONTACT_UP)
{
priv->sample.contact = CONTACT_NONE;
priv->sample.valid = false;
priv->id++;
return;
}
#endif
/* If there are threads waiting for read data, then signal one of them
* that the read data is available.
*/
if (priv->nwaiters > 0)
{
/* After posting this semaphore, we need to exit because the touchscreen
* is no longer available.
*/
nxsem_post(&priv->waitsem);
}
/* If there are threads waiting on poll() for touchscreen data to become available,
* then wake them up now. NOTE: we wake up all waiting threads because we
* do not know that they are going to do. If they all try to read the data,
* then some make end up blocking after all.
*/
#ifndef CONFIG_DISABLE_POLL
for (i = 0; i < CONFIG_TOUCHSCREEN_NPOLLWAITERS; i++)
{
struct pollfd *fds = priv->fds[i];
if (fds)
{
fds->revents |= POLLIN;
iinfo("Report events: %02x\n", fds->revents);
nxsem_post(fds->sem);
}
}
#endif
}
static bool tsc_busy(FAR struct ads7843e_config_s *state)
{
#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_INFO)
static bool last = (bool)-1;
#endif
/* BUSY is high impedance when CS is high (not selected). When CS is
* is low, BUSY is active high.
*/
bool busy = sam_gpioread(GPIO_TCS_BUSY);
#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_INFO)
if (busy != last)
{
iinfo("busy:%d\n", busy);
last = busy;
}
#endif
return busy;
}
/*****************************************************************************************************************************
open
Prepares the database for use. An existing database is opened or otherwise an empty database is created.
If the database is openend a table _META with meta info is loaded into a dictionary _META. The dictionary key is the
code of the data element. A data element is either a tabel (dimension/event) or a field (characteristic/property).
The value of the dictionary is the MET_INFO structure. This structure contains meta data about the data element.
If the database is created an empty table _META is created.
The function calls virtual functions, db_, which must be overriden by a derived class for a specific database implementation.
******************************************************************************************************************************/
void ARAS::open(DBInfo dbInfo) {
if (isopen)
return;
// store db information
this->dbInfo = dbInfo;
// open or create database
// performs the database specific initialization code, the specific information to be used is stored in the struct DBInfo.
db_init_database();
// performs the database specific code to check whether a database alreay exists and open it.
if (db_open_database()) {
// read _META table from database into dictionary _META
TABLE values;
db_select_table("_META", {"CODE","INFO"}, values);
for (auto i : values)
_META.insert(std::pair<std::string, META_INFO>(i[0], META_INFO(i[1])));
}
else {
// performs the database specific code to create a new database based on DBInfo.
db_create_database();
// create table _META: define the columns
META_INFO imeta(data_type::DIM, 0, "_META", "", "", "_META", "CODE", 0, 0, 0, 0);
META_INFO icode(data_type::STR, SIZE_META_CODE_MAX, "_META", "", "","_META", "", 0, 0, 1, 0);
META_INFO idescs(data_type::STR, SIZE_DESCS_MAX, "_META", "", "", "_META", "", 0, 0, 0, 0);
META_INFO idescl(data_type::STR, SIZE_DESCL_MAX, "_META", "", "", "_META", "", 0, 0, 0, 0);
META_INFO iinfo(data_type::STR, 0, "_META", "", "", "_META", "",0, 0, 0, 0);
// define the table
META_TABLE meta = { { "_META", "Meta data", "Meta data", imeta }, { "CODE", "CODE", "CODE", icode }, { "DESCS", "Short Description", "Short Description", idescs }, { "DESCL", "Long Description", "Long Description", idescl }, { "INFO", "INFO", "INFO", iinfo } };
// performs the database specific code to create a new table
db_create_table(meta);
// load the meta data into the dictionary and the database table _META
for (auto i : meta)
insert_meta(i);
}
}
static ajoy_buttonset_t ajoy_buttons(FAR const struct ajoy_lowerhalf_s *lower)
{
ajoy_buttonset_t ret = 0;
int i;
/* Read each joystick GPIO value */
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Button outputs are pulled high. So a sensed low level means that the
* button is pressed.
*/
if (!stm32_gpioread(g_joygpio[i]))
{
ret |= (1 << i);
}
}
iinfo("Returning: %02x\n", ret);
return ret;
}
static void max11802_notify(FAR struct max11802_dev_s *priv)
{
#ifndef CONFIG_DISABLE_POLL
int i;
#endif
/* If there are threads waiting for read data, then signal one of them
* that the read data is available.
*/
if (priv->nwaiters > 0)
{
/* After posting this semaphore, we need to exit because the sample
* is no longer available.
*/
sem_post(&priv->waitsem);
}
/* If there are threads waiting on poll() for MAX11802 data to become
* available, then wake them up now. NOTE: we wake up all waiting
* threads because we do not know that they are going to do. If they
* all try to read the data, then some make end up blocking after all.
*/
#ifndef CONFIG_DISABLE_POLL
for (i = 0; i < CONFIG_MAX11802_NPOLLWAITERS; i++)
{
struct pollfd *fds = priv->fds[i];
if (fds)
{
fds->revents |= POLLIN;
iinfo("Report events: %02x\n", fds->revents);
sem_post(fds->sem);
}
}
#endif
}
int sam_tsc_setup(int minor)
{
FAR struct spi_dev_s *dev;
int ret;
iinfo("minor %d\n", minor);
DEBUGASSERT(minor == 0);
/* Configure and enable the ADS7843E interrupt pin as an input */
(void)sam_configgpio(GPIO_TCS_BUSY);
(void)sam_configgpio(GPIO_TCS_IRQ);
/* Configure the PIO interrupt */
sam_gpioirq(GPIO_TCS_IRQ);
/* Get an instance of the SPI interface for the touchscreen chip select */
dev = sam_spibus_initialize(TSC_CSNUM);
if (!dev)
{
ierr("ERROR: Failed to initialize SPI chip select %d\n", TSC_CSNUM);
return -ENODEV;
}
/* Initialize and register the SPI touschscreen device */
ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
if (ret < 0)
{
ierr("ERROR: Failed to initialize SPI chip select %d\n", TSC_CSNUM);
/* sam_spibus_uninitialize(dev); */
return -ENODEV;
}
return OK;
}
static int max11802_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode;
FAR struct max11802_dev_s *priv;
int ret;
int i;
iinfo("setup: %d\n", (int)setup);
DEBUGASSERT(filep && fds);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct max11802_dev_s *)inode->i_private;
/* Are we setting up the poll? Or tearing it down? */
ret = sem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was canceled by an signal */
DEBUGASSERT(errno == EINTR);
return -EINTR;
}
if (setup)
{
/* Ignore waits that do not include POLLIN */
if ((fds->events & POLLIN) == 0)
{
ret = -EDEADLK;
goto errout;
}
/* This is a request to set up the poll. Find an available
* slot for the poll structure reference
*/
for (i = 0; i < CONFIG_MAX11802_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!priv->fds[i])
{
/* Bind the poll structure and this slot */
priv->fds[i] = fds;
fds->priv = &priv->fds[i];
break;
}
}
if (i >= CONFIG_MAX11802_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto errout;
}
/* Should we immediately notify on any of the requested events? */
if (priv->penchange)
{
max11802_notify(priv);
}
}
else if (fds->priv)
{
/* This is a request to tear down the poll. */
struct pollfd **slot = (struct pollfd **)fds->priv;
DEBUGASSERT(slot != NULL);
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
}
errout:
sem_post(&priv->devsem);
return ret;
}
static ssize_t max11802_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode;
FAR struct max11802_dev_s *priv;
FAR struct touch_sample_s *report;
struct max11802_sample_s sample;
int ret;
iinfo("buffer:%p len:%d\n", buffer, len);
DEBUGASSERT(filep);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct max11802_dev_s *)inode->i_private;
/* Verify that the caller has provided a buffer large enough to receive
* the touch data.
*/
if (len < SIZEOF_TOUCH_SAMPLE_S(1))
{
/* We could provide logic to break up a touch report into segments and
* handle smaller reads... but why?
*/
ierr("ERROR: Unsupported read size: %d\n", len);
return -ENOSYS;
}
/* Get exclusive access to the driver data structure */
ret = sem_wait(&priv->devsem);
if (ret < 0)
{
/* This should only happen if the wait was cancelled by an signal */
ierr("ERROR: sem_wait: %d\n", errno);
DEBUGASSERT(errno == EINTR);
return -EINTR;
}
/* Try to read sample data. */
ret = max11802_sample(priv, &sample);
if (ret < 0)
{
/* Sample data is not available now. We would ave to wait to get
* receive sample data. If the user has specified the O_NONBLOCK
* option, then just return an error.
*/
iinfo("Sample data is not available\n");
if (filep->f_oflags & O_NONBLOCK)
{
ret = -EAGAIN;
goto errout;
}
/* Wait for sample data */
ret = max11802_waitsample(priv, &sample);
if (ret < 0)
{
/* We might have been awakened by a signal */
ierr("ERROR: max11802_waitsample: %d\n", ret);
goto errout;
}
}
/* In any event, we now have sampled MAX11802 data that we can report
* to the caller.
*/
report = (FAR struct touch_sample_s *)buffer;
memset(report, 0, SIZEOF_TOUCH_SAMPLE_S(1));
report->npoints = 1;
report->point[0].id = sample.id;
report->point[0].x = sample.x;
report->point[0].y = sample.y;
/* Report the appropriate flags */
if (sample.contact == CONTACT_UP)
{
/* Pen is now up. Is the positional data valid? This is important to
* know because the release will be sent to the window based on its
* last positional data.
*/
if (sample.valid)
{
report->point[0].flags = TOUCH_UP | TOUCH_ID_VALID | TOUCH_POS_VALID;
}
else
{
report->point[0].flags = TOUCH_UP | TOUCH_ID_VALID;
}
}
else if (sample.contact == CONTACT_DOWN)
{
/* First contact */
report->point[0].flags = TOUCH_DOWN | TOUCH_ID_VALID | TOUCH_POS_VALID;
}
else /* if (sample->contact == CONTACT_MOVE) */
{
/* Movement of the same contact */
report->point[0].flags = TOUCH_MOVE | TOUCH_ID_VALID | TOUCH_POS_VALID;
}
iinfo(" id: %d\n", report->point[0].id);
iinfo(" flags: %02x\n", report->point[0].flags);
iinfo(" x: %d\n", report->point[0].x);
iinfo(" y: %d\n", report->point[0].y);
ret = SIZEOF_TOUCH_SAMPLE_S(1);
errout:
sem_post(&priv->devsem);
iinfo("Returning: %d\n", ret);
return ret;
}
static ajoy_buttonset_t ajoy_supported(FAR const struct ajoy_lowerhalf_s *lower)
{
iinfo("Supported: %02x\n", AJOY_SUPPORTED);
return (ajoy_buttonset_t)AJOY_SUPPORTED;
}
static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
FAR struct ajoy_sample_s *sample)
{
#ifndef NO_JOYSTICK_ADC
struct adc_msg_s adcmsg[MAX_ADC_CHANNELS];
FAR struct adc_msg_s *ptr;
ssize_t nread;
ssize_t offset;
int have;
int i;
/* Read all of the available samples (handling the case where additional
* channels are enabled).
*/
nread = file_read(&g_adcfile, adcmsg,
MAX_ADC_CHANNELS * sizeof(struct adc_msg_s));
if (nread < 0)
{
if (nread != -EINTR)
{
ierr("ERROR: read failed: %d\n", (int)nread);
}
return nread;
}
else if (nread < NJOYSTICK_CHANNELS * sizeof(struct adc_msg_s))
{
ierr("ERROR: read too small: %ld\n", (long)nread);
return -EIO;
}
/* Sample and the raw analog inputs */
#ifdef CONFIG_ADC_DMA
have = 0;
#else
/* If DMA is not supported, then we will have only a single ADC channel */
have = 2;
sample->as_y = 0;
#endif
for (i = 0, offset = 0;
i < MAX_ADC_CHANNELS && offset < nread && have != 3;
i++, offset += sizeof(struct adc_msg_s))
{
ptr = &adcmsg[i];
/* Is this one of the channels that we need? */
if ((have & 1) == 0 && ptr->am_channel == 0)
{
int32_t tmp = ptr->am_data;
sample->as_x = (int16_t)tmp;
have |= 1;
iinfo("X sample: %ld -> %d\n", (long)tmp, (int)sample->as_x);
}
#ifdef CONFIG_ADC_DMA
if ((have & 2) == 0 && ptr->am_channel == 1)
{
int32_t tmp = ptr->am_data;
sample->as_y = (int16_t)tmp;
have |= 2;
iinfo("Y sample: %ld -> %d\n", (long)tmp, (int)sample->as_y);
}
#endif
}
if (have != 3)
{
ierr("ERROR: Could not find joystick channels\n");
return -EIO;
}
#else
/* ADC support is disabled */
sample->as_x = 0;
sample->as_y = 0;
#endif
/* Sample the discrete button inputs */
sample->as_buttons = ajoy_buttons(lower);
iinfo("Returning: %02x\n", sample->as_buttons);
return OK;
}
static void max11802_worker(FAR void *arg)
{
FAR struct max11802_dev_s *priv = (FAR struct max11802_dev_s *)arg;
FAR struct max11802_config_s *config;
uint16_t x;
uint16_t y;
uint16_t xdiff;
uint16_t ydiff;
bool pendown;
int ret;
int tags, tags2;
ASSERT(priv != NULL);
/* Get a pointer the callbacks for convenience (and so the code is not so
* ugly).
*/
config = priv->config;
DEBUGASSERT(config != NULL);
/* Disable the watchdog timer. This is safe because it is started only
* by this function and this function is serialized on the worker thread.
*/
wd_cancel(priv->wdog);
/* Lock the SPI bus so that we have exclusive access */
max11802_lock(priv->spi);
/* Start coordinate measurement */
(void)max11802_sendcmd(priv, MAX11802_CMD_MEASUREXY, &tags);
/* Get exclusive access to the driver data structure */
do
{
ret = sem_wait(&priv->devsem);
/* This should only fail if the wait was cancelled by an signal
* (and the worker thread will receive a lot of signals).
*/
DEBUGASSERT(ret == OK || errno == EINTR);
}
while (ret < 0);
/* Check for pen up or down by reading the PENIRQ GPIO. */
pendown = config->pendown(config);
/* Handle the change from pen down to pen up */
if (pendown)
{
iinfo("\nPD\n");
}
else
{
iinfo("\nPU\n");
}
if (!pendown)
{
/* The pen is up.. reset thresholding variables. */
priv->threshx = INVALID_THRESHOLD;
priv->threshy = INVALID_THRESHOLD;
/* Ignore the interrupt if the pen was already up (CONTACT_NONE ==
* pen up and already reported; CONTACT_UP == pen up, but not
* reported).
*/
iinfo("\nPC%d\n", priv->sample.contact);
if (priv->sample.contact == CONTACT_NONE ||
priv->sample.contact == CONTACT_UP)
{
goto ignored;
}
/* The pen is up. NOTE: We know from a previous test, that this is a
* loss of contact condition. This will be changed to CONTACT_NONE
* after the loss of contact is sampled.
*/
priv->sample.contact = CONTACT_UP;
}
/* It is a pen down event. If the last loss-of-contact event has not been
* processed yet, then we have to ignore the pen down event (or else it
* will look like a drag event)
*/
else if (priv->sample.contact == CONTACT_UP)
{
/* If we have not yet processed the last pen up event, then we
* cannot handle this pen down event. We will have to discard it.
* That should be okay because we will set the timer to to sample
* again later.
*/
iinfo("Previous pen up event still in buffer\n");
max11802_notify(priv);
wd_start(priv->wdog, MAX11802_WDOG_DELAY, max11802_wdog, 1,
(uint32_t)priv);
goto ignored;
}
else
{
/* Wait for data ready
*
* Note: MAX11802 signals the readiness of the results using
* the lowest 4 bits of the result. However these are the
* last bits to be read out of the device. It appears that
* the hardware value can change in the middle of the readout,
* causing the upper bits to be still invalid even though lower
* bits indicate valid result.
*
* We work around this by reading the registers once more after
* the tags indicate they are ready.
*/
int readycount = 0;
do
{
#ifdef CONFIG_MAX11802_SWAPXY
x = max11802_sendcmd(priv, MAX11802_CMD_YPOSITION, &tags);
y = max11802_sendcmd(priv, MAX11802_CMD_XPOSITION, &tags2);
#else
x = max11802_sendcmd(priv, MAX11802_CMD_XPOSITION, &tags);
y = max11802_sendcmd(priv, MAX11802_CMD_YPOSITION, &tags2);
#endif
if (tags != 0xF && tags2 != 0xF)
{
readycount++;
}
}
while (readycount < 2);
/* Continue to sample the position while the pen is down */
wd_start(priv->wdog, MAX11802_WDOG_DELAY, max11802_wdog, 1,
(uint32_t)priv);
/* Check if data is valid */
if ((tags & 0x03) != 0)
{
iinfo("Touch ended before measurement\n");
goto ignored;
}
/* Perform a thresholding operation so that the results will be more
* stable. If the difference from the last sample is small, then
* ignore the event.
*
* REVISIT: Should a large change in pressure also generate a event?
*/
xdiff = x > priv->threshx ? (x - priv->threshx) : (priv->threshx - x);
ydiff = y > priv->threshy ? (y - priv->threshy) : (priv->threshy - y);
/* Check the thresholds. Bail if there is no significant difference */
if (xdiff < CONFIG_MAX11802_THRESHX && ydiff < CONFIG_MAX11802_THRESHY)
{
/* Little or no change in either direction ... don't report anything. */
goto ignored;
}
/* When we see a big difference, snap to the new x/y thresholds */
priv->threshx = x;
priv->threshy = y;
/* Update the x/y position in the sample data */
priv->sample.x = priv->threshx;
priv->sample.y = priv->threshy;
/* The X/Y positional data is now valid */
priv->sample.valid = true;
/* If this is the first (acknowledged) pen down report, then report
* this as the first contact. If contact == CONTACT_DOWN, it will be
* set to set to CONTACT_MOVE after the contact is first sampled.
*/
if (priv->sample.contact != CONTACT_MOVE)
{
/* First contact */
priv->sample.contact = CONTACT_DOWN;
}
}
/* Indicate the availability of new sample data for this ID */
priv->sample.id = priv->id;
priv->penchange = true;
/* Notify any waiters that new MAX11802 data is available */
max11802_notify(priv);
ignored:
config->enable(config, true);
/* Release our lock on the state structure and unlock the SPI bus */
sem_post(&priv->devsem);
max11802_unlock(priv->spi);
}
static int max11802_waitsample(FAR struct max11802_dev_s *priv,
FAR struct max11802_sample_s *sample)
{
irqstate_t flags;
int ret;
/* Interrupts must be disabled when this is called to (1) prevent posting
* of semaphores from interrupt handlers, and (2) to prevent sampled data
* from changing until it has been reported.
*
* In addition, we will also disable pre-emption to prevent other threads
* from getting control while we muck with the semaphores.
*/
sched_lock();
flags = enter_critical_section();
/* Now release the semaphore that manages mutually exclusive access to
* the device structure. This may cause other tasks to become ready to
* run, but they cannot run yet because pre-emption is disabled.
*/
sem_post(&priv->devsem);
/* Try to get the a sample... if we cannot, then wait on the semaphore
* that is posted when new sample data is available.
*/
while (max11802_sample(priv, sample) < 0)
{
/* Wait for a change in the MAX11802 state */
iinfo("Waiting..\n");
priv->nwaiters++;
ret = sem_wait(&priv->waitsem);
priv->nwaiters--;
if (ret < 0)
{
/* If we are awakened by a signal, then we need to return
* the failure now.
*/
ierr("ERROR: sem_wait: %d\n", errno);
DEBUGASSERT(errno == EINTR);
ret = -EINTR;
goto errout;
}
}
iinfo("Sampled\n");
/* Re-acquire the semaphore that manages mutually exclusive access to
* the device structure. We may have to wait here. But we have our
* sample. Interrupts and pre-emption will be re-enabled while we wait.
*/
ret = sem_wait(&priv->devsem);
errout:
/* Then re-enable interrupts. We might get interrupt here and there
* could be a new sample. But no new threads will run because we still
* have pre-emption disabled.
*/
leave_critical_section(flags);
/* Restore pre-emption. We might get suspended here but that is okay
* because we already have our sample. Note: this means that if there
* were two threads reading from the MAX11802 for some reason, the data
* might be read out of order.
*/
sched_unlock();
return ret;
}
int max11802_register(FAR struct spi_dev_s *spi,
FAR struct max11802_config_s *config, int minor)
{
FAR struct max11802_dev_s *priv;
char devname[DEV_NAMELEN];
#ifdef CONFIG_MAX11802_MULTIPLE
irqstate_t flags;
#endif
int ret;
iinfo("spi: %p minor: %d\n", spi, minor);
/* Debug-only sanity checks */
DEBUGASSERT(spi != NULL && config != NULL && minor >= 0 && minor < 100);
/* Create and initialize a MAX11802 device driver instance */
#ifndef CONFIG_MAX11802_MULTIPLE
priv = &g_max11802;
#else
priv = (FAR struct max11802_dev_s *)kmm_malloc(sizeof(struct max11802_dev_s));
if (!priv)
{
ierr("ERROR: kmm_malloc(%d) failed\n", sizeof(struct max11802_dev_s));
return -ENOMEM;
}
#endif
/* Initialize the MAX11802 device driver instance */
memset(priv, 0, sizeof(struct max11802_dev_s));
priv->spi = spi; /* Save the SPI device handle */
priv->config = config; /* Save the board configuration */
priv->wdog = wd_create(); /* Create a watchdog timer */
priv->threshx = INVALID_THRESHOLD; /* Initialize thresholding logic */
priv->threshy = INVALID_THRESHOLD; /* Initialize thresholding logic */
/* Initialize semaphores */
sem_init(&priv->devsem, 0, 1); /* Initialize device structure semaphore */
sem_init(&priv->waitsem, 0, 0); /* Initialize pen event wait semaphore */
/* The pen event semaphore is used for signaling and, hence, should not
* have priority inheritance enabled.
*/
sem_setprotocol(&priv->waitsem, SEM_PRIO_NONE);
/* Make sure that interrupts are disabled */
config->clear(config);
config->enable(config, false);
/* Attach the interrupt handler */
ret = config->attach(config, max11802_interrupt);
if (ret < 0)
{
ierr("ERROR: Failed to attach interrupt\n");
goto errout_with_priv;
}
iinfo("Mode: %d Bits: 8 Frequency: %d\n",
CONFIG_MAX11802_SPIMODE, CONFIG_MAX11802_FREQUENCY);
/* Lock the SPI bus so that we have exclusive access */
max11802_lock(spi);
/* Configure MAX11802 registers */
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
(void)SPI_SEND(priv->spi, MAX11802_CMD_MODE_WR);
(void)SPI_SEND(priv->spi, MAX11802_MODE);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
(void)SPI_SEND(priv->spi, MAX11802_CMD_AVG_WR);
(void)SPI_SEND(priv->spi, MAX11802_AVG);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
(void)SPI_SEND(priv->spi, MAX11802_CMD_TIMING_WR);
(void)SPI_SEND(priv->spi, MAX11802_TIMING);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
(void)SPI_SEND(priv->spi, MAX11802_CMD_DELAY_WR);
(void)SPI_SEND(priv->spi, MAX11802_DELAY);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
/* Test that the device access was successful. */
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, true);
(void)SPI_SEND(priv->spi, MAX11802_CMD_MODE_RD);
ret = SPI_SEND(priv->spi, 0);
SPI_SELECT(priv->spi, SPIDEV_TOUCHSCREEN, false);
/* Unlock the bus */
max11802_unlock(spi);
if (ret != MAX11802_MODE)
{
ierr("ERROR: max11802 mode readback failed: %02x\n", ret);
goto errout_with_priv;
}
/* Register the device as an input device */
(void)snprintf(devname, DEV_NAMELEN, DEV_FORMAT, minor);
iinfo("Registering %s\n", devname);
ret = register_driver(devname, &max11802_fops, 0666, priv);
if (ret < 0)
{
ierr("ERROR: register_driver() failed: %d\n", ret);
goto errout_with_priv;
}
/* If multiple MAX11802 devices are supported, then we will need to add
* this new instance to a list of device instances so that it can be
* found by the interrupt handler based on the recieved IRQ number.
*/
#ifdef CONFIG_MAX11802_MULTIPLE
flags = enter_critical_section();
priv->flink = g_max11802list;
g_max11802list = priv;
leave_critical_section(flags);
#endif
/* Schedule work to perform the initial sampling and to set the data
* availability conditions.
*/
ret = work_queue(HPWORK, &priv->work, max11802_worker, priv, 0);
if (ret != 0)
{
ierr("ERROR: Failed to queue work: %d\n", ret);
goto errout_with_priv;
}
/* And return success (?) */
return OK;
errout_with_priv:
sem_destroy(&priv->devsem);
#ifdef CONFIG_MAX11802_MULTIPLE
kmm_free(priv);
#endif
return ret;
}
static void tc_worker(FAR void *arg)
{
FAR struct tc_dev_s *priv = (FAR struct tc_dev_s *)arg;
uint32_t delay = TC_PENUP_POLL_TICKS;
uint16_t value;
uint16_t newx = 0;
int16_t xdiff;
int16_t ydiff;
int ret;
DEBUGASSERT(priv != NULL);
/* Perform the next action based on the state of the conversions */
switch (priv->state)
{
/* The touchscreen is IDLE and we are ready to begin the next sample */
case TC_READY:
{
/* Select DRIVE for Y sampling */
/* Configure XL, XR with drive voltages and disable YU drive. Note that
* this is configuring the DRIVEA and DRIVEB outputs to enable the on-board
* transistor drive logic to energize the touch panel.
*/
*((uint32_t *) LCD_TP_PORT_SETRESET) = LCD_SAMPY_BITS;
/* Allow time for the Y DRIVE to settle */
priv->resamplecount = 0;
priv->sampcount = 0;
priv->value = 0;
priv->state = TC_READY_SETTLE;
delay = TC_SETTLE_TICKS;
}
break;
case TC_READY_SETTLE:
{
/* Start Y sampling */
tc_y_sample();
/* Allow time for the Y pend down sampling */
priv->state = TC_YPENDOWN;
delay = TC_SAMPLE_TICKS;
}
break;
/* The Y sampling time has elapsed and the Y value should be ready
* for conversion
*/
case TC_YPENDOWN:
{
/* Convert the Y sample value */
value = tc_adc_read_sample();
/* A converted value at the minimum would mean that there is no touch
* and that the sampling period is complete.
*/
if (!tc_valid_sample(value))
{
priv->state = TC_PENUP;
}
else
{
/* Allow time for touch inputs to stabilize */
priv->state = TC_DEBOUNCE;
delay = TC_DEBOUNCE_TICKS;
}
}
break;
/* The debounce time period has elapsed and we are ready to re-sample
* the touchscreen.
*/
case TC_RESAMPLE:
{
/* Select DRIVE for Y sampling */
/* Configure XL, XR with drive voltages and disable YU drive. Note that
* this is configuring the DRIVEA and DRIVEB outputs to enable the on-board
* transistor drive logic to energize the touch panel.
*/
*((uint32_t *) LCD_TP_PORT_SETRESET) = LCD_SAMPY_BITS;
/* Allow time for the Y DRIVE to settle */
priv->state = TC_DEBOUNCE;
delay = TC_SETTLE_TICKS;
}
break;
case TC_DEBOUNCE:
{
/* (Re-)start Y sampling */
tc_y_sample();
/* Allow time for the Y sampling */
priv->state = TC_YSAMPLE;
delay = TC_SAMPLE_TICKS;
}
break;
/* The Y sampling period has elapsed and we are ready to perform the
* conversion.
*/
case TC_YSAMPLE: /* Allowing time for the Y sampling */
{
/* Read the Y axis position */
value = tc_adc_read_sample();
/* A converted value at the minimum would mean that we lost the contact
* before all of the conversions were completed. At converted value at
* the maximum value is probably bad too.
*/
if (!tc_valid_sample(value))
{
#ifdef CONFIG_TOUCHSCREEN_RESAMPLE
priv->state = TC_RESAMPLE;
delay = TC_RESAMPLE_TICKS;
#else
priv->state = TC_PENUP;
#endif
}
else
{
value = MAX_ADC - value;
priv->value += value;
if (++priv->sampcount < CONFIG_TOUCHSCREEN_AVG_SAMPLES)
{
priv->state = TC_READY_SETTLE;
delay = 1;
break;
}
priv->newy = value / CONFIG_TOUCHSCREEN_AVG_SAMPLES;
priv->value = 0;
priv->sampcount = 0;
iinfo("Y=%d\n", priv->newy);
/* Configure YU and YD with drive voltages and disable XR drive. Note that
* this is configuring the DRIVEA and DRIVEB outputs to enable the on-board
* transistor drive logic to energize the touch panel.
*/
*((uint32_t *) LCD_TP_PORT_SETRESET) = LCD_SAMPX_BITS;
/* Allow time for the X sampling */
priv->state = TC_XSETTLE;
delay = TC_SETTLE_TICKS;
}
}
break;
case TC_XRESAMPLE: /* Perform X resampling */
{
if (priv->resamplecount-- == 0)
{
priv->state = TC_PENUP;
break;
}
}
case TC_XSETTLE: /* Allowing time X to settle after changing DRIVE */
{
/* The X Drive settling time has elaspsed and it's time to start
* the conversion
*/
/* Start X sampling */
tc_x_sample();
/* Allow time for the X sampling */
priv->state = TC_XSAMPLE;
delay = TC_SAMPLE_TICKS;
}
break;
case TC_XSAMPLE: /* Allowing time for the X sampling */
{
/* Read the converted X axis position */
value = tc_adc_read_sample();
/* A converted value at the minimum would mean that we lost the contact
* before all of the conversions were completed. At converted value at
* the maximum value is probably bad too.
*/
if (!tc_valid_sample(value))
{
#ifdef CONFIG_TOUCHSCREEN_RESAMPLE
priv->state = TC_XRESAMPLE;
if (priv->resamplecount == 0)
priv->resamplecount = 1;
delay = TC_RESAMPLE_TICKS;
#else
priv->state = TC_PENUP;
#endif
}
else
{
/* Calculate the X axis position */
//value = MAX_ADC - value;
priv->value += value;
if (++priv->sampcount < CONFIG_TOUCHSCREEN_AVG_SAMPLES)
{
priv->state = TC_XSETTLE;
delay = 1;
break;
}
newx = value / CONFIG_TOUCHSCREEN_AVG_SAMPLES;
iinfo("X=%d\n", newx);
/* Samples are available */
priv->state = TC_PENDOWN;
}
}
break;
}
/* Check for terminal conditions.. */
/* Check if the sampling resulted in a pen up decision. If so, we need to
* handle the change from pen down to pen up.
*/
if (priv->state == TC_PENUP)
{
/* Ignore if the pen was already down (CONTACT_NONE == pen up and already
* reported. CONTACT_UP == pen up, but not reported)
*/
if (priv->sample.contact != CONTACT_NONE &&
priv->sample.contact != CONTACT_UP)
{
/* The pen is up. We know from the above test, that this is a
* loss of contact condition. This will be changed to CONTACT_NONE
* after the loss of contact is sampled.
*/
priv->sample.contact = CONTACT_UP;
/* 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 */
iinfo("1:X=%d, Y=%d\n", priv->sample.x, priv->sample.y);
tc_notify(priv);
}
/* Set up for the next poll */
priv->sample.valid = false;
priv->state = TC_READY;
delay = TC_PENUP_POLL_TICKS;
}
/* Check if the sampling resulted in a pen down decision. */
else if (priv->state == TC_PENDOWN)
{
/* It is a pen down event. If the last loss-of-contact event has not been
* processed yet, then we have to ignore the pen down event (or else it will
* look like a drag event)
*/
if (priv->sample.contact != CONTACT_UP)
{
/* Perform a thresholding operation so that the results will be more stable.
* If the difference from the last sample is small, then ignore the event.
*/
xdiff = (int16_t)priv->sample.x - (int16_t)newx;
if (xdiff < 0)
{
xdiff = -xdiff;
}
ydiff = (int16_t)priv->sample.y - (int16_t)priv->newy;
if (ydiff < 0)
{
ydiff = -ydiff;
}
if (xdiff >= CONFIG_TOUCHSCREEN_THRESHX ||
ydiff >= CONFIG_TOUCHSCREEN_THRESHY)
{
/* There is some change above the threshold... Report the change. */
#ifdef CONFIG_LCD_LANDSCAPE
priv->sample.x = MAX_ADC - priv->newy;
priv->sample.y = newx;
#else
priv->sample.x = newx;
priv->sample.y = priv->newy;
#endif
priv->sample.valid = true;
/* If this is the first (acknowledged) penddown report, then report
* this as the first contact. If contact == CONTACT_DOWN, it will be
* set to set to CONTACT_MOVE after the contact is first sampled.
*/
if (priv->sample.contact != CONTACT_MOVE)
{
/* First contact */
priv->sample.contact = CONTACT_DOWN;
}
/* Indicate the availability of new sample data for this ID */
priv->sample.id = priv->id;
priv->penchange = true;
/* Notify any waiters that nes touchscreen data is available */
iinfo("2:X=%d, Y=%d\n", priv->sample.x, priv->sample.y);
tc_notify(priv);
}
}
/* Set up for the next poll */
priv->state = TC_READY;
delay = TC_PENDOWN_POLL_TICKS;
}
/* Set up the next sample event */
ret = work_queue(HPWORK, &priv->work, tc_worker, priv, delay);
DEBUGASSERT(ret == 0);
}
int stm32_tsc_setup(int minor)
{
FAR struct tc_dev_s *priv;
char devname[DEV_NAMELEN];
#ifdef CONFIG_TOUCHSCREEN_MULTIPLE
irqstate_t flags;
#endif
int ret;
iinfo("minor: %d\n", minor);
DEBUGASSERT(minor >= 0 && minor < 100);
/* If we only have one touchscreen, check if we already did init */
#ifndef CONFIG_TOUCHSCREEN_MULTIPLE
if (g_touchinitdone)
{
return OK;
}
#endif
/* Configure the touchscreen DRIVEA and DRIVEB pins for output */
stm32_configgpio(GPIO_TP_DRIVEA);
stm32_configgpio(GPIO_TP_DRIVEB);
/* Configure Analog inputs for sampling X and Y coordinates */
stm32_configgpio(GPIO_TP_XL);
stm32_configgpio(GPIO_TP_YD);
tc_adc_init();
/* Create and initialize a touchscreen device driver instance */
#ifndef CONFIG_TOUCHSCREEN_MULTIPLE
priv = &g_touchscreen;
#else
priv = (FAR struct tc_dev_s *)kmm_malloc(sizeof(struct tc_dev_s));
if (!priv)
{
ierr("ERROR: kmm_malloc(%d) failed\n", sizeof(struct tc_dev_s));
return -ENOMEM;
}
#endif
/* Initialize the touchscreen device driver instance */
memset(priv, 0, sizeof(struct tc_dev_s));
nxsem_init(&priv->devsem, 0, 1); /* Initialize device structure semaphore */
nxsem_init(&priv->waitsem, 0, 0); /* Initialize pen event wait semaphore */
/* Register the device as an input device */
(void)snprintf(devname, DEV_NAMELEN, DEV_FORMAT, minor);
iinfo("Registering %s\n", devname);
ret = register_driver(devname, &tc_fops, 0666, priv);
if (ret < 0)
{
ierr("ERROR: register_driver() failed: %d\n", ret);
goto errout_with_priv;
}
/* Schedule work to perform the initial sampling and to set the data
* availability conditions.
*/
priv->state = TC_READY;
ret = work_queue(HPWORK, &priv->work, tc_worker, priv, 0);
if (ret != 0)
{
ierr("ERROR: Failed to queue work: %d\n", ret);
goto errout_with_priv;
}
/* And return success (?) */
#ifndef CONFIG_TOUCHSCREEN_MULTIPLE
g_touchinitdone = true;
#endif
return OK;
errout_with_priv:
nxsem_destroy(&priv->devsem);
#ifdef CONFIG_TOUCHSCREEN_MULTIPLE
kmm_free(priv);
#endif
return ret;
}
static void djoy_sample(FAR struct djoy_upperhalf_s *priv)
{
FAR const struct djoy_lowerhalf_s *lower = priv->du_lower;
FAR struct djoy_open_s *opriv;
djoy_buttonset_t sample;
#if !defined(CONFIG_DISABLE_POLL) || !defined(CONFIG_DISABLE_SIGNALS)
djoy_buttonset_t change;
djoy_buttonset_t press;
djoy_buttonset_t release;
#endif
irqstate_t flags;
#ifndef CONFIG_DISABLE_POLL
int i;
#endif
DEBUGASSERT(priv && priv->du_lower);
lower = priv->du_lower;
/* This routine is called both task level and interrupt level, so
* interrupts must be disabled.
*/
flags = enter_critical_section();
/* Sample the new button state */
DEBUGASSERT(lower->dl_sample);
sample = lower->dl_sample(lower);
#if !defined(CONFIG_DISABLE_POLL) || !defined(CONFIG_DISABLE_SIGNALS)
/* Determine which buttons have been newly pressed and which have been
* newly released.
*/
change = sample ^ priv->du_sample;
press = change & sample;
DEBUGASSERT(lower->dl_supported);
release = change & (lower->dl_supported(lower) & ~sample);
/* Visit each opened reference to the device */
for (opriv = priv->du_open; opriv; opriv = opriv->do_flink)
{
#ifndef CONFIG_DISABLE_POLL
/* Have any poll events occurred? */
if ((press & opriv->do_pollevents.dp_press) != 0 ||
(release & opriv->do_pollevents.dp_release) != 0)
{
/* Yes.. Notify all waiters */
for (i = 0; i < CONFIG_DJOYSTICK_NPOLLWAITERS; i++)
{
FAR struct pollfd *fds = opriv->do_fds[i];
if (fds)
{
fds->revents |= (fds->events & POLLIN);
if (fds->revents != 0)
{
iinfo("Report events: %02x\n", fds->revents);
sem_post(fds->sem);
}
}
}
}
#endif
#ifndef CONFIG_DISABLE_SIGNALS
/* Have any signal events occurred? */
if ((press & opriv->do_notify.dn_press) != 0 ||
(release & opriv->do_notify.dn_release) != 0)
{
/* Yes.. Signal the waiter */
#ifdef CONFIG_CAN_PASS_STRUCTS
union sigval value;
value.sival_int = (int)sample;
(void)sigqueue(opriv->do_pid, opriv->do_notify.dn_signo, value);
#else
(void)sigqueue(opriv->do_pid, opriv->do_notify.dn.signo,
(FAR void *)sample);
#endif
}
#endif
}
/* Enable/disable interrupt handling */
djoy_enable(priv);
#endif
priv->du_sample = sample;
leave_critical_section(flags);
}
int board_ajoy_initialize(void)
{
int ret;
int i;
#ifndef NO_JOYSTICK_ADC
int fd;
iinfo("Initialize ADC driver: /dev/adc0\n");
/* NOTE: The ADC driver was initialized earlier in the bring-up sequence. */
/* Open the ADC driver for reading. */
fd = open("/dev/adc0", O_RDONLY);
if (fd < 0)
{
int errcode = get_errno();
ierr("ERROR: Failed to open /dev/adc0: %d\n", errcode);
return -errcode;
}
/* Detach the file structure from the file descriptor so that it can be
* used on any thread.
*/
ret = file_detach(fd, &g_adcfile);
if (ret < 0)
{
ierr("ERROR: Failed to detach from file descriptor: %d\n", ret);
(void)close(fd);
return ret;
}
#endif
/* Configure the GPIO pins as interrupting inputs. NOTE: This is
* unnecessary for interrupting pins since it will also be done by
* stm32_gpiosetevent().
*/
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Configure the PIO as an input */
stm32_configgpio(g_joygpio[i]);
}
/* Register the joystick device as /dev/ajoy0 */
iinfo("Initialize joystick driver: /dev/ajoy0\n");
ret = ajoy_register("/dev/ajoy0", &g_ajoylower);
if (ret < 0)
{
ierr("ERROR: ajoy_register failed: %d\n", ret);
#ifndef NO_JOYSTICK_ADC
file_close_detached(&g_adcfile);
#endif
}
return ret;
}
int stmpe811_register(STMPE811_HANDLE handle, int minor)
{
FAR struct stmpe811_dev_s *priv = (FAR struct stmpe811_dev_s *)handle;
char devname[DEV_NAMELEN];
int ret;
iinfo("handle=%p minor=%d\n", handle, minor);
DEBUGASSERT(priv);
/* Get exclusive access to the device structure */
ret = sem_wait(&priv->exclsem);
if (ret < 0)
{
int errval = errno;
ierr("ERROR: sem_wait failed: %d\n", errval);
return -errval;
}
/* Make sure that the pins (4-7) need by the TSC are not already in use */
if ((priv->inuse & TSC_PIN_SET) != 0)
{
ierr("ERROR: TSC pins is already in-use: %02x\n", priv->inuse);
sem_post(&priv->exclsem);
return -EBUSY;
}
/* Initialize the TS structure fields to their default values */
priv->minor = minor;
priv->penchange = false;
priv->threshx = 0;
priv->threshy = 0;
/* Create a timer for catching missed pen up conditions */
priv->wdog = wd_create();
if (!priv->wdog)
{
ierr("ERROR: Failed to create a watchdog\n", errno);
sem_post(&priv->exclsem);
return -ENOSPC;
}
/* Register the character driver */
snprintf(devname, DEV_NAMELEN, DEV_FORMAT, minor);
ret = register_driver(devname, &g_stmpe811fops, 0666, priv);
if (ret < 0)
{
ierr("ERROR: Failed to register driver %s: %d\n", devname, ret);
sem_post(&priv->exclsem);
return ret;
}
/* Initialize the touchscreen controller */
stmpe811_tscinitialize(priv);
/* Inidicate that the touchscreen controller was successfully initialized */
priv->inuse |= TSC_PIN_SET; /* Pins 4-7 are now in-use */
priv->flags |= STMPE811_FLAGS_TSC_INITIALIZED; /* TSC function is initialized */
sem_post(&priv->exclsem);
return ret;
}
