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apps/graphics/ft80x: Add more touchscreen interfaces. apps/examples/ft80x: Add an interactive example using buttons, keys, and touchscreen input.

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This commit is contained in:
Gregory Nutt 2018-02-25 11:20:39 -06:00
parent 9b1b912861
commit e15526f683
8 changed files with 788 additions and 4 deletions
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95
include/graphics/ft80x.h
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@ -70,6 +70,32 @@ struct ft80x_dlbuffer_s
uint32_t dlbuffer[FT80X_DL_BUFWORDS];
};
/* Describes touch sample */
union ft80x_touchpos_u
{
uint32_t xy; /* To force 32-bit alignment */
struct /* Little-endian */
{
int16_t x; /* Touch X position (-32768 if no touch) */
int16_t y; /* Touch Y position (-32768 if no touch) */
} u;
};
struct ft80x_touchinfo_s
{
uint8_t tag; /* Touch 0 tag */
#if defined(CONFIG_LCD_FT800)
int16_t pressure; /* Touch pressure (32767 if not touched) */
#endif
union ft80x_touchpos_u tagpos; /* Position associated with tag */
#if defined(CONFIG_LCD_FT800) || !defined(CONFIG_LCD_FT801_MULTITOUCH)
union ft80x_touchpos_u pos; /* Current touch position */
#else
union ft80x_touchpos_u pos[4]; /* Current touch position for up to 4 touches */
#endif
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
@ -326,6 +352,75 @@ int ft80x_ramg_write(int fd, unsigned int offset, FAR const void *data,
int ft80x_touch_gettransform(int fd, FAR uint32_t matrix[6]);
/****************************************************************************
* Name: ft80x_touch_tag
*
* Description:
* Read the current touch tag. The touch tag is an 8-bit value
* identifying the specific graphics object on the screen that is being
* touched. The value zero indicates that there is no graphic object being
* touched.
*
* Only a single touch can be queried. For the FT801 in "extended",
* multi-touch mode, this value indicates only the tag associated with
* touch 0.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
*
* Returned Value:
* A value of 1-255 is returned if a graphics object is touched. Zero is
* returned if no graphics object is touched. A negated errno value on failure.
*
****************************************************************************/
int ft80x_touch_tag(int fd);
/****************************************************************************
* Name: ft80x_touch_waittag
*
* Description:
* Wait until there is a change in the touch tag.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* oldtag - The previous tag value. This function will return when the
* current touch tag differs from this value.
*
* Returned Value:
* A value of 1-255 is returned if a graphics object is touched. Zero is
* returned if no graphics object is touched. A negated errno value on failure.
*
****************************************************************************/
int ft80x_touch_waittag(int fd, uint8_t oldtag);
/****************************************************************************
* Name: ft80x_touch_info
*
* Description:
* Return the current touch tag and touch position information.
*
* For the FT801 in "extended", multi-touch mode, the tag value indicates
* only the tag associated with touch 0.
*
* Touch positions of -32768 indicate that no touch is detected.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* info - Location in which to return the touch information
*
* Returned Value:
* A value of 1-255 is returned if a graphics object is touched. Zero is
* returned if no graphics object is touched. A negated errno value on failure.
*
****************************************************************************/
int ft80x_touch_info(int fd, FAR struct ft80x_touchinfo_s *info);
/****************************************************************************
* Name: ft80x_backlight_set
*