sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add touchscreen calibration IOCTLs, necessary structs, and implement for ATSAMA5D2

Browse Source 
CI error
This commit is contained in:
TimJTi 2023-05-23 13:03:56 +01:00 committed by Xiang Xiao
parent 653ea69927
commit c12a122663
2 changed files with 123 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
arch/arm/src/sama5/sam_tsd.c
View File

@ -172,19 +172,23 @@ struct sam_sample_s
struct sam_tsd_s struct sam_tsd_s
{ {
uint8_t nwaiters; /* Number of threads waiting for touchscreen data */ uint8_t nwaiters; /* Num threads waiting for TSD data */
uint8_t id; /* Current touch point ID */ uint8_t id; /* Current touch point ID */
uint8_t valid; /* Data ready bit set */ uint8_t valid; /* Data ready bit set */
uint8_t crefs; /* The number of times the device has been opened */ uint8_t crefs; /* Number of times device opened */
volatile bool penchange; /* An unreported event is buffered */ volatile bool penchange; /* An unreported event is buffered */
uint32_t threshx; /* Thresholding X value */ uint32_t threshx; /* Thresholding X value */
uint32_t threshy; /* Thresholding Y value */ uint32_t threshy; /* Thresholding Y value */
sem_t waitsem; /* Used to wait for the availability of data */ sem_t waitsem; /* Used to wait for data available */
struct sam_adc_s *adc; /* ADC device handle */ struct sam_adc_s *adc; /* ADC device handle */
struct work_s work; /* Supports the interrupt handling "bottom half" */ struct work_s work; /* Supports int. handling "bottom half" */
struct sam_sample_s sample; /* Last sampled touch point data */ struct sam_sample_s sample; /* Last sampled touch point data */
struct wdog_s wdog; /* Poll the position while the pen is down */ struct wdog_s wdog; /* Poll position while the pen is down */
struct g_tscaldata_s caldata; /* Touchscreen Calibration Data */
bool scaled; /* Character dreiver read should return
* scaled values (true) or not (false).
*/
/* The following is a list if poll structures of threads waiting for /* The following is a list if poll structures of threads waiting for
* driver events. The 'struct pollfd' reference for each open is also * driver events. The 'struct pollfd' reference for each open is also
@ -689,11 +693,11 @@ static void sam_tsd_bottomhalf(void *arg)
*/ */
#ifdef CONFIG_SAMA5_TSD_SWAPXY #ifdef CONFIG_SAMA5_TSD_SWAPXY
x = ((yraw << 12) - yraw) / yscale; x = ((yraw << 12)) / yscale;
y = ((xraw << 12) - xraw) / xscale; y = ((xraw << 12)) / xscale;
#else #else
x = ((xraw << 12) - xraw) / xscale; x = ((xraw << 12)) / xscale;
y = ((yraw << 12) - yraw) / yscale; y = ((yraw << 12)) / yscale;
#endif #endif
/* Perform a thresholding operation so that the results will be /* Perform a thresholding operation so that the results will be
@ -1025,10 +1029,22 @@ static ssize_t sam_tsd_read(struct file *filep, char *buffer, size_t len)
report = (struct touch_sample_s *)buffer; report = (struct touch_sample_s *)buffer;
memset(report, 0, SIZEOF_TOUCH_SAMPLE_S(1)); memset(report, 0, SIZEOF_TOUCH_SAMPLE_S(1));
report->npoints = 1; report->npoints = 1;
report->point[0].id = sample.id; report->point[0].id = sample.id;
report->point[0].x = sample.x;
report->point[0].y = sample.y; if (priv->scaled)
{
report->point[0].x = SCALE_TS(itob16(sample.x), priv->caldata.offset_x,
priv->caldata.slope_x);
report->point[0].y = SCALE_TS(itob16(sample.y), priv->caldata.offset_y,
priv->caldata.slope_y);
}
else
{
report->point[0].x = sample.x;
report->point[0].y = sample.y;
}
#ifdef CONFIG_SAMA5_TSD_4WIRE #ifdef CONFIG_SAMA5_TSD_4WIRE
report->point[0].pressure = sample.p; report->point[0].pressure = sample.p;
#endif #endif
@ -1085,7 +1101,8 @@ static int sam_tsd_ioctl(struct file *filep, int cmd, unsigned long arg)
{ {
struct inode *inode; struct inode *inode;
struct sam_tsd_s *priv; struct sam_tsd_s *priv;
int ret; int ret = OK;
int regval;
iinfo("cmd: %d arg: %ld\n", cmd, arg); iinfo("cmd: %d arg: %ld\n", cmd, arg);
DEBUGASSERT(filep); DEBUGASSERT(filep);
@ -1102,6 +1119,30 @@ static int sam_tsd_ioctl(struct file *filep, int cmd, unsigned long arg)
switch (cmd) switch (cmd)
{ {
case TSIOC_DOACALIB:
{
/* Initiate auto-calibration sequence */
regval = sam_adc_getreg(priv->adc, SAM_ADC_ACR);
regval = ADC_CR_TSCALIB | ADC_CR_START;
sam_adc_putreg(priv->adc, SAM_ADC_CR, regval);
}
break;
case TSIOC_CALDATA:
{
/* Receive calibration data for the touchscreen */
struct g_tscaldata_s *ptr =
(struct g_tscaldata_s *)((uintptr_t)arg);
DEBUGASSERT(ptr != NULL);
priv->caldata = *ptr;
}
break;
case TSIOC_USESCALED:
{
priv->scaled = (bool)(arg);
}
break;
default: default:
ret = -ENOTTY; ret = -ENOTTY;
break; break;

67
include/nuttx/input/touchscreen.h
View File

@ -39,6 +39,8 @@
#include <nuttx/mm/circbuf.h> #include <nuttx/mm/circbuf.h>
#include <nuttx/semaphore.h> #include <nuttx/semaphore.h>
#include <time.h> #include <time.h>
#include <inttypes.h>
#include <fixedmath.h>
/**************************************************************************** /****************************************************************************
* Pre-processor Definitions * Pre-processor Definitions
@ -48,12 +50,32 @@
/* Common TSC IOCTL commands */ /* Common TSC IOCTL commands */
#define TSIOC_SETCALIB _TSIOC(0x0001) /* arg: Pointer to int calibration value */ #define TSIOC_SETCALIB _TSIOC(0x0001) /* arg: Pointer to
#define TSIOC_GETCALIB _TSIOC(0x0002) /* arg: Pointer to int calibration value */ * int Xplate R calibration value
#define TSIOC_SETFREQUENCY _TSIOC(0x0003) /* arg: Pointer to uint32_t frequency value */ */
#define TSIOC_GETFREQUENCY _TSIOC(0x0004) /* arg: Pointer to uint32_t frequency value */ #define TSIOC_GETCALIB _TSIOC(0x0002) /* arg: Pointer to
#define TSIOC_GETFWVERSION _TSIOC(0x0005) /* arg: Pointer to uint32_t firmware version value */ * int Xplate R calibration value
#define TSIOC_ENABLEGESTURE _TSIOC(0x0006) /* arg: Pointer to int for enable gesture feature */ */
#define TSIOC_SETFREQUENCY _TSIOC(0x0003) /* arg: Pointer to
* uint32_t frequency value
*/
#define TSIOC_GETFREQUENCY _TSIOC(0x0004) /* arg: Pointer to
* uint32_t frequency value
*/
#define TSIOC_GETFWVERSION _TSIOC(0x0005) /* arg: Pointer to
* uint32_t firmware version
* value
* */
#define TSIOC_ENABLEGESTURE _TSIOC(0x0006) /* arg: Pointer to
* int for enable gesture feature
*/
#define TSIOC_DOACALIB _TSIOC(0x0007) /* arg: none.
* Initiate TS auto calibration
*/
#define TSIOC_CALDATA _TSIOC(0x0008) /* arg: Pointer to
* struct g_tscaldata_s
*/
#define TSIOC_USESCALED _TSIOC(0x0009) /* arg: bool, yes/no */
#define TSC_FIRST 0x0001 /* First common command */ #define TSC_FIRST 0x0001 /* First common command */
#define TSC_NCMDS 6 /* Six common commands */ #define TSC_NCMDS 6 /* Six common commands */
@ -105,10 +127,43 @@
#define TOUCH_SLIDE_RIGHT (0x04) #define TOUCH_SLIDE_RIGHT (0x04)
#define TOUCH_PALM (0x05) #define TOUCH_PALM (0x05)
/* Help function */
#define SCALE_TS(x, o, s) (b16toi(b16divb16(((x) - (o)), (s))))
/**************************************************************************** /****************************************************************************
* Public Types * Public Types
****************************************************************************/ ****************************************************************************/
/* This struct is used to store touchscreen calibration data for use by
* low level touichscreen drivers.
*
* It is used as follows:
*
* scaledX = (raw_x - offset_x) / slope_x
* scaledY = (raw_y - offset_y) / slope_y
*
* The calibration values would typically be derived by taking top left and
* bottom right measurements on the actual LCD/touchscreen used:
*
* xSlope = (ActualRightX - ActualLeftX) / (WantedRightX - WantedLeftX)
* xOffset = ActualLeftX - (WantedLeftX * xSlope)
*
* And similarly for the Y values.
*
* ySlope = (ActualBottomY - ActualTopY) / (WantedBottomY - WantedTopY)
* yOffset = ActualTopY - (WantedTopY * ySlope)
*
*/
struct g_tscaldata_s
{
b16_t slope_x;
b16_t offset_x;
b16_t slope_y;
b16_t offset_y;
};
/* This structure contains information about a single touch point. /* This structure contains information about a single touch point.
* Positional units are device specific. * Positional units are device specific.
*/ */