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Fuze+: add a configurable deadzone area for touchpad buttons

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To stop erroneous button presses, allow users to add a deadzone between
the button via the Settings > General > System menu > Touch Dead Zone.

The configuration was chosen this way: the touchpad has the same DPI
in both direction so the setting applies the same on both the X and Y
axis. The setting ranges from 0 to 100 and is internally multiplied by 2
giving a maximum deadzone of 2*100 = 200 around each button, which
account for 400 total (once around each button), effectively reducing
each virtual button from 1000x600 to 600x200 when using the maximum value.

Change-Id: I8683c63d2950200eb32d1dda0a00bbd92d83d5be
Reviewed-on: http://gerrit.rockbox.org/677
Reviewed-by: Benjamin Brown <foolshperson@gmail.com>
Tested: Benjamin Brown <foolshperson@gmail.com>
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>
This commit is contained in:
Amaury Pouly 2013-12-01 18:25:42 +00:00
parent 847106cdb2
commit 8146b40e73
10 changed files with 108 additions and 28 deletions
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66
firmware/target/arm/imx233/sansa-fuzeplus/button-fuzeplus.c
View file

@ -192,33 +192,22 @@ bool button_debug_screen(void)
return true;
}
struct button_area_t
/* we emulate a 3x3 grid, this gives the button mapping */
int button_mapping[3][3] =
{
/* define a rectangle region */
int lx, ly;
int rx, ry;
int button;
};
static struct button_area_t button_areas[] =
{
{1003, 658, 2006, 1316, BUTTON_SELECT},
{0, 658, 1003, 1316, BUTTON_LEFT},
{2006, 658, 3009, 1316, BUTTON_RIGHT},
{1003, 0 , 2006, 658, BUTTON_DOWN},
{1003, 1316, 2006, 1974, BUTTON_UP},
{2006, 1316, 3009, 1974, BUTTON_PLAYPAUSE},
{0, 1316, 1003, 1974, BUTTON_BACK},
{0, 0 , 1003, 658, BUTTON_BOTTOMLEFT},
{2006, 0 , 3009, 658, BUTTON_BOTTOMRIGHT},
{0, 0, 0, 0, 0},
{BUTTON_BOTTOMLEFT, BUTTON_LEFT, BUTTON_BACK},
{BUTTON_DOWN, BUTTON_SELECT, BUTTON_UP},
{BUTTON_BOTTOMRIGHT, BUTTON_RIGHT, BUTTON_PLAYPAUSE},
};
#define RMI_INTERRUPT 1
#define RMI_SET_SENSITIVITY 2
#define RMI_SET_SLEEP_MODE 3
/* timeout before lowering touchpad power from lack of activity */
#define ACTIVITY_TMO (5 * HZ)
#define ACTIVITY_TMO (5 * HZ)
#define TOUCHPAD_WIDTH 3010
#define TOUCHPAD_HEIGHT 1975
#define DEADZONE_MULTIPLIER 2 /* deadzone multiplier */
static int touchpad_btns = 0;
static long rmi_stack [DEFAULT_STACK_SIZE/sizeof(long)];
@ -226,17 +215,38 @@ static const char rmi_thread_name[] = "rmi";
static struct event_queue rmi_queue;
static unsigned last_activity = 0;
static bool t_enable = true;
static int deadzone;
/* Ignore deadzone function. If outside of the pad, project to border. */
static int find_button_no_deadzone(int x, int y)
{
/* compute grid coordinate */
int gx = MAX(MIN(x * 3 / TOUCHPAD_WIDTH, 2), 0);
int gy = MAX(MIN(y * 3 / TOUCHPAD_HEIGHT, 2), 0);
return button_mapping[gx][gy];
}
static int find_button(int x, int y)
{
struct button_area_t *area = button_areas;
for(; area->button != 0; area++)
{
if(area->lx <= x && x <= area->rx &&
area->ly <= y && y <= area->ry)
return area->button;
}
return 0;
/* find button ignoring deadzones */
int btn = find_button_no_deadzone(x, y);
/* To check if we are in a deadzone, we try to shift the coordinates
* and see if we get the same button. Not that we do not want to apply
* the deadzone in the borders ! The code works even in the borders because
* the find_button_no_deadzone() project out-of-bound coordinates to the
* borders */
if(find_button_no_deadzone(x + deadzone, y) != btn ||
find_button_no_deadzone(x - deadzone, y) != btn ||
find_button_no_deadzone(x, y + deadzone) != btn ||
find_button_no_deadzone(x, y - deadzone) != btn)
return 0;
return btn;
}
void touchpad_set_deadzone(int touchpad_deadzone)
{
deadzone = touchpad_deadzone * DEADZONE_MULTIPLIER;
}
static int touchpad_read_device(void)

1
firmware/target/arm/imx233/sansa-fuzeplus/button-target.h
View file

@ -24,6 +24,7 @@
#include <stdbool.h>
bool button_debug_screen(void);
void touchpad_set_sensitivity(int level);
void touchpad_set_deadzone(int touchpad_deadzone);
void touchpad_enable_device(bool en);
/* Main unit's buttons */