touchpad calibration (very simple calibration screen is in mrobe500.c

but will not actually be used in the bootloader once rockbox main is running)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14937 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 99 insertions, 20 deletions

diff --git a/bootloader/mrobe500.c b/bootloader/mrobe500.c
index 1133fa6def..5f80d6d6c9 100755
--- a/bootloader/mrobe500.c
+++ b/bootloader/mrobe500.c
@@ -41,9 +41,59 @@
 #include "spi.h"

 #include "uart-target.h"

 #include "tsc2100.h"

+#include "time.h"

 

 extern int line;

 

+struct touch_calibration_point tl, br;

+

+void touchpad_get_one_point(struct touch_calibration_point *p)

+{

+    int data = 0;

+    int start = current_tick;

+    while (TIME_AFTER(start+(HZ/3), current_tick))

+    {

+        if (button_read_device()&BUTTON_TOUCHPAD)

+        {

+            data = button_get_last_touch();

+            p->val_x = data>>16;

+            p->val_y = data&0xffff;

+            start = current_tick;

+        }

+        else if (data == 0)

+            start = current_tick;

+    }

+}

+

+#define MARGIN 25

+#define LEN    7

+void touchpad_calibrate_screen(void)

+{

+    reset_screen();

+    printf("touch the center of the crosshairs to calibrate");

+    /* get the topleft value */

+    lcd_hline(MARGIN-LEN, MARGIN+LEN, MARGIN);

+    lcd_vline(MARGIN, MARGIN-LEN, MARGIN+LEN);

+    lcd_update();

+    tl.px_x = MARGIN; tl.px_y = MARGIN;

+    touchpad_get_one_point(&tl);

+    reset_screen();

+    printf("touch the center of the crosshairs to calibrate");

+    /* get the topright value */

+    lcd_hline(LCD_WIDTH-MARGIN-LEN, LCD_WIDTH-MARGIN+LEN, LCD_HEIGHT-MARGIN);

+    lcd_vline(LCD_WIDTH-MARGIN, LCD_HEIGHT-MARGIN-LEN, LCD_HEIGHT-MARGIN+LEN);

+    lcd_update();

+    br.px_x = LCD_WIDTH-MARGIN; br.px_y = LCD_HEIGHT-MARGIN;

+    touchpad_get_one_point(&br);

+    reset_screen();

+    line++;

+    printf("tl %d %d", tl.val_x, tl.val_y);

+    printf("br %d %d", br.val_x, br.val_y);

+    line++;

+    set_calibration_points(&tl, &br);

+}

+

+

 void main(void)

 {

     unsigned char* loadbuffer;

@@ -101,8 +151,14 @@ void main(void)
     }

 #if 0

     int button=0, *address=0x0, count=0;

+    use_calibration(false);

+    touchpad_calibrate_screen();

+    use_calibration(true);

     while(true)

     {

+        struct tm *t = get_time();

+        printf("%d:%d:%d %d %d %d", t->tm_hour, t->tm_min, t->tm_sec, t->tm_mday, t->tm_mon, t->tm_year);

+        printf("time: %d", mktime(t));

         button = button_read_device();

         if (button == BUTTON_POWER)

         {

@@ -119,26 +175,11 @@ void main(void)
             address-=0x1000;

         if (button&BUTTON_TOUCHPAD)

         {

-            int touch = button_get_last_touch();

-            printf("x: %d, y: %d", (touch>>16), touch&0xffff);

-            line--;

+            unsigned int data = button_get_last_touch();

+            printf("x: %d, y: %d", data>>16, data&0xffff);

+            line-=3;

         }

-//         if ((IO_GIO_BITSET0&(1<<14) == 0)

-//         {

-//             short x,y,z1,z2, reg;

-//             extern int uart1count;

-//             tsc2100_read_values(&x, &y, &z1, &z2);

-//             printf("x: %04x y: %04x z1: %04x z2: %04x", x, y, z1, z2);

-//             printf("tsadc: %4x", tsc2100_readreg(TSADC_PAGE, TSADC_ADDRESS)&0xffff);

-//             printf("current tick: %04x", current_tick);

-//             printf("Address: 0x%08x Data: 0x%08x", address, *address);

-//             printf("Address: 0x%08x Data: 0x%08x", address+1, *(address+1));

-//             printf("Address: 0x%08x Data: 0x%08x", address+2, *(address+2));

-//             printf("uart1count: %d", uart1count);

-//             printf("%x %x", IO_UART1_RFCR & 0x3f, IO_UART1_DTRR & 0xff);

-//             tsc2100_keyclick(); /* doesnt work :( */

-//             line -= 8;

-//         }

+        else line -=2;

     }

 #endif

     printf("ATA");

diff --git a/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
index b157ae2d12..c30422fc79 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
@@ -38,6 +38,36 @@
                                 /* but always the same one for the session? */
 static short last_x, last_y, last_z1, last_z2; /* for the touch screen */
 static int last_touch;
+
+static struct touch_calibration_point topleft, bottomright;
+static bool using_calibration = false;
+void use_calibration(bool enable)
+{
+    using_calibration = enable;
+}
+
+void set_calibration_points(struct touch_calibration_point *tl,
+                            struct touch_calibration_point *br)
+{
+    memcpy(&topleft, tl, sizeof(struct touch_calibration_point));
+    memcpy(&bottomright, br, sizeof(struct touch_calibration_point));
+}
+static int touch_to_pixels(short val_x, short val_y)
+{
+    short x,y;
+    int x1,x2;
+    if (!using_calibration)
+        return (val_x<<16)|val_y;
+    x1 = topleft.val_x; x2 = bottomright.val_x;
+    x = (val_x-x1)*(bottomright.px_x - topleft.px_x) / (x2 - x1) + topleft.px_x;
+    x1 = topleft.val_y; x2 = bottomright.val_y;
+    y = (val_y-x1)*(bottomright.px_y - topleft.px_y) / (x2 - x1) + topleft.px_y;
+    if (x < 0)
+        x = 0;
+    if (y < 0)
+        y = 0;
+    return (x<<16)|y;
+}
 void button_init_device(void)
 {
     last_touch = 0;
@@ -128,6 +158,6 @@ void GIO14(void)
 {
     tsc2100_read_values(&last_x,  &last_y,
                         &last_z1, &last_z2);
-    last_touch = (last_x<<16)|last_y;
+    last_touch = touch_to_pixels(last_x, last_y);
     IO_INTC_IRQ2 = (1<<3);
 }
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/button-target.h b/firmware/target/arm/tms320dm320/mrobe-500/button-target.h
index f574321717..d1fd46c629 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/button-target.h
+++ b/firmware/target/arm/tms320dm320/mrobe-500/button-target.h
@@ -29,6 +29,14 @@ bool button_hold(void);
 void button_init_device(void);
 int button_read_device(void);
 
+struct touch_calibration_point {
+    short px_x; /* known pixel value */
+    short px_y;
+    short val_x; /* touchpad value at the known pixel */
+    short val_y;
+};
+void use_calibration(bool enable);
+
 /* m:robe 500 specific button codes */
 
 #define BUTTON_POWER        0x00000001