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The STMPE11/touchscreen is now fully functional on the STM3240G-EVAL

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4715 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-05-08 22:10:29 +00:00
parent 7cc9218389
commit 5d31022f9d
12 changed files with 190 additions and 101 deletions
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nuttx/drivers/input/stmpe11.h
+2 -2
View File
@@ -148,8 +148,8 @@ struct stmpe11_dev_s
uint8_t minor; /* Touchscreen minor device number */
volatile bool penchange; /* An unreported event is buffered */
uint32_t threshx; /* Thresholded X value */
uint32_t threshy; /* Thresholded Y value */
uint16_t threshx; /* Thresholded X value */
uint16_t threshy; /* Thresholded Y value */
sem_t waitsem; /* Used to wait for the availability of data */
struct work_s work; /* Supports the interrupt handling "bottom half" */
nuttx/drivers/input/stmpe11_base.c
+39 -19
View File
@@ -43,10 +43,10 @@
#include <nuttx/config.h>
#include <unistd.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/input/stmpe11.h>
@@ -92,7 +92,9 @@ static void stmpe11_worker(FAR void *arg)
FAR struct stmpe11_dev_s *priv = (FAR struct stmpe11_dev_s *)arg;
uint8_t regval;
/* Get the globl interrupt status */
DEBUGASSERT(priv && priv->config);
/* Get the global interrupt status */
regval = stmpe11_getreg8(priv, STMPE11_INT_STA);
@@ -132,16 +134,16 @@ static void stmpe11_worker(FAR void *arg)
}
#endif
/* Clear any other residual, unhandled pending interrupt */
/* Clear any other residual, unhandled pending interrupt */
if (regval != 0)
{
stmpe11_putreg8(priv, STMPE11_INT_STA, regval);
}
if (regval != 0)
{
stmpe11_putreg8(priv, STMPE11_INT_STA, regval);
}
/* Clear the STMPE11 global interrupt */
/* Re-enable the STMPE11 GPIO interrupt */
priv->config->clear(priv->config);
priv->config->enable(priv->config, true);
}
/****************************************************************************
@@ -244,7 +246,7 @@ static void stmpe11_reset(FAR struct stmpe11_dev_s *priv)
/* Wait a bit */
up_mdelay(20);
usleep(20*1000);
/* Then power on again. All registers will be in their reset state. */
@@ -285,12 +287,6 @@ STMPE11_HANDLE stmpe11_instantiate(FAR struct i2c_dev_s *dev,
uint8_t regval;
int ret;
/* On entry the following is assumed:
*
* I2C initialization ready
* GPIO pins already configured.
*/
/* Allocate the device state structure */
#ifdef CONFIG_STMPE11_MULTIPLE
@@ -314,10 +310,20 @@ STMPE11_HANDLE stmpe11_instantiate(FAR struct i2c_dev_s *dev,
/* Initialize the device state structure */
sem_init(&priv->exclsem, 0, 1);
priv->config = config;
#ifdef CONFIG_STMPE11_SPI
priv->spi = dev;
#else
priv->i2c = dev;
/* Set the I2C address and frequency. REVISIT: This logic would be
* insufficient if we share the I2C bus with any other devices that also
* modify the address and frequency.
*/
I2C_SETADDRESS(dev, config->address, 7);
I2C_SETFREQUENCY(dev, config->frequency);
#endif
/* Read and verify the STMPE11 chip ID */
@@ -335,10 +341,14 @@ STMPE11_HANDLE stmpe11_instantiate(FAR struct i2c_dev_s *dev,
stmpe11_reset(priv);
/* Configure the interrupt output pin to generate interrupts on high level. */
/* Configure the interrupt output pin to generate interrupts on high or low level. */
regval = stmpe11_getreg8(priv, STMPE11_INT_CTRL);
regval |= INT_CTRL_INT_POLARITY; /* Pin polarity: Active high */
#ifdef CONFIG_STMPE11_ACTIVELOW
regval &= ~INT_CTRL_INT_POLARITY; /* Pin polarity: Active low / falling edge */
#else
regval |= INT_CTRL_INT_POLARITY; /* Pin polarity: Active high / rising edge */
#endif
regval &= ~INT_CTRL_INT_TYPE; /* Level interrupt */
stmpe11_putreg8(priv, STMPE11_INT_CTRL, regval);
@@ -409,6 +419,9 @@ uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr)
return 0;
}
#ifdef CONFIG_STMPE11_REGDEBUG
dbg("%02x->%02x\n", regaddr, regval);
#endif
return regval;
}
#endif
@@ -434,6 +447,10 @@ void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv,
uint8_t txbuffer[2];
int ret;
#ifdef CONFIG_STMPE11_REGDEBUG
dbg("%02x<-%02x\n", regaddr, regval);
#endif
/* Setup to the data to be transferred. Two bytes: The STMPE11 register
* address followed by one byte of data.
*/
@@ -507,7 +524,10 @@ uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr)
return 0;
}
return (uint16_t)rxbuffer[0] << 16 | (uint16_t)rxbuffer[1];
#ifdef CONFIG_STMPE11_REGDEBUG
dbg("%02x->%02x%02x\n", regaddr, rxbuffer[0], rxbuffer[1]);
#endif
return (uint16_t)rxbuffer[0] << 8 | (uint16_t)rxbuffer[1];
}
#endif
nuttx/drivers/input/stmpe11_tsc.c
+42 -28
View File
@@ -139,7 +139,7 @@ static inline void stmpe11_tscinitialize(FAR struct stmpe11_dev_s *priv);
/* This the the vtable that supports the character driver interface */
static const struct file_operations stmpe11_fops =
static const struct file_operations g_stmpe11fops =
{
stmpe11_open, /* open */
stmpe11_close, /* close */
@@ -464,6 +464,7 @@ static ssize_t stmpe11_read(FAR struct file *filep, FAR char *buffer, size_t len
struct stmpe11_sample_s sample;
int ret;
ivdbg("len=%d\n", len);
DEBUGASSERT(filep);
inode = filep->f_inode;
@@ -741,7 +742,9 @@ errout:
static inline void stmpe11_tscinitialize(FAR struct stmpe11_dev_s *priv)
{
uint8_t regval = 0;
uint8_t regval;
ivdbg("Initializing touchscreen controller\n");
/* Enable TSC and ADC functions */
@@ -831,8 +834,10 @@ static inline void stmpe11_tscinitialize(FAR struct stmpe11_dev_s *priv)
int stmpe11_register(STMPE11_HANDLE handle, int minor)
{
FAR struct stmpe11_dev_s *priv = (FAR struct stmpe11_dev_s *)handle;
char devname[DEV_NAMELEN];
int ret;
ivdbg("handle=%p minor=%d\n", handle, minor);
DEBUGASSERT(priv);
/* Get exclusive access to the device structure */
@@ -854,25 +859,34 @@ int stmpe11_register(STMPE11_HANDLE handle, int minor)
return -EBUSY;
}
/* Update the configuration structure to show that the TSC function is allocated */
/* Initialize the TS structure to their default values */
priv->inuse |= TSC_PIN_SET; /* Pins 4-7 are now in-use */
priv->flags |= STMPE11_FLAGS_TSC_INITIALIZED; /* TSC function is initialized */
priv->minor = minor; /* Save the minor number */
priv->minor = minor;
priv->penchange = false;
priv->threshx = 0;
priv->threshy = 0;
/* Register the character driver */
snprintf(devname, DEV_NAMELEN, DEV_FORMAT, minor);
ret = register_driver(devname, &g_stmpe11fops, 0666, priv);
if (ret < 0)
{
idbg("Failed to register driver %s: %d\n", devname, ret);
sem_post(&priv->exclsem);
return ret;
}
/* Initialize the touchscreen controller */
stmpe11_tscinitialize(priv);
/* Initialize the TS structure to their default values */
/* Inidicate that the touchscreen controller was successfully initialized */
priv->penchange = false;
priv->threshx = 0;
priv->threshy = 0;
priv->flags |= STMPE11_FLAGS_GPIO_INITIALIZED;
priv->inuse |= TSC_PIN_SET; /* Pins 4-7 are now in-use */
priv->flags |= STMPE11_FLAGS_TSC_INITIALIZED; /* TSC function is initialized */
sem_post(&priv->exclsem);
return OK;
return ret;
}
/****************************************************************************
@@ -894,6 +908,7 @@ void stmpe11_tscworker(FAR struct stmpe11_dev_s *priv)
uint16_t x; /* X position */
uint16_t y; /* Y position */
ivdbg("Sampling\n");
ASSERT(priv != NULL);
/* Get a pointer the callbacks for convenience (and so the code is not so
@@ -903,10 +918,9 @@ void stmpe11_tscworker(FAR struct stmpe11_dev_s *priv)
config = priv->config;
DEBUGASSERT(config != NULL);
/* Check if the Touch detect event happened */
/* Check for pen up or down from the TSC_STA ibit n the STMPE11_TSC_CTRL register. */
pendown = (stmpe11_getreg8(priv, STMPE11_TSC_CTRL) & STMPE11_TSC_CTRL) != 0;
pendown = (stmpe11_getreg8(priv, STMPE11_TSC_CTRL) & TSC_CTRL_TSC_STA) != 0;
/* Handle the change from pen down to pen up */
@@ -918,17 +932,22 @@ void stmpe11_tscworker(FAR struct stmpe11_dev_s *priv)
if (priv->sample.contact == CONTACT_NONE)
{
goto errout;
return;
}
}
else
{
/* Read the next x and y positions */
#ifdef CONFIG_STMPE11_SWAPXY
x = stmpe11_getreg16(priv, STMPE11_TSC_DATAX);
y = stmpe11_getreg16(priv, STMPE11_TSC_DATAY);
#else
x = stmpe11_getreg16(priv, STMPE11_TSC_DATAY);
y = stmpe11_getreg16(priv, STMPE11_TSC_DATAX);
#endif
/* Perform a threasholding operation so that the results will be more stable */
/* Perform a thresholding operation so that the results will be more stable */
xdiff = x > priv->threshx ? (x - priv->threshx) : (priv->threshx - x);
ydiff = y > priv->threshy ? (y - priv->threshy) : (priv->threshy - y);
@@ -949,13 +968,13 @@ void stmpe11_tscworker(FAR struct stmpe11_dev_s *priv)
/* Update the Z pression index */
priv->sample.z = stmpe11_getreg8(priv, STMPE11_TSC_DATAZ);
/* Clear the interrupt pending bit and enable the FIFO again */
stmpe11_putreg8(priv, STMPE11_FIFO_STA, 0x01);
stmpe11_putreg8(priv, STMPE11_FIFO_STA, 0x00);
}
/* Clear the interrupt pending bit and enable the FIFO again */
stmpe11_putreg8(priv, STMPE11_FIFO_STA, 0x01);
stmpe11_putreg8(priv, STMPE11_FIFO_STA, 0x00);
/* Note the availability of new measurements */
if (pendown)
@@ -987,14 +1006,9 @@ void stmpe11_tscworker(FAR struct stmpe11_dev_s *priv)
priv->sample.id = priv->id;
priv->penchange = true;
/* Notify any waiters that nes STMPE11 data is available */
/* Notify any waiters that new STMPE11 data is available */
stmpe11_notify(priv);
/* Exit, re-enabling STMPE11 interrupts */
errout:
config->enable(config, true);
}
#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 && !CONFIG_STMPE11_TSC_DISABLE */