fa1a38e7ce
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15180 a1c6a512-1295-4272-9138-f99709370657
168 lines
4.6 KiB
C
168 lines
4.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Karl Kurbjun
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/* this file also handles the touch screen driver interface */
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#include "config.h"
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#include "cpu.h"
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#include "system.h"
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#include "button.h"
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#include "kernel.h"
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#include "backlight.h"
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#include "adc.h"
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#include "system.h"
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#include "backlight-target.h"
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#include "uart-target.h"
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#include "tsc2100.h"
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#include "string.h"
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#define BUTTON_TIMEOUT 50
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#define BUTTON_START_BYTE 0xF0
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#define BUTTON_START_BYTE2 0xF4 /* not sure why, but sometimes you get F0 or F4, */
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/* but always the same one for the session? */
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static short last_x, last_y, last_z1, last_z2; /* for the touch screen */
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static int last_touch;
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static struct touch_calibration_point topleft, bottomright;
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static bool using_calibration = false;
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void use_calibration(bool enable)
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{
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using_calibration = enable;
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}
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void set_calibration_points(struct touch_calibration_point *tl,
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struct touch_calibration_point *br)
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{
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memcpy(&topleft, tl, sizeof(struct touch_calibration_point));
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memcpy(&bottomright, br, sizeof(struct touch_calibration_point));
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}
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static int touch_to_pixels(short val_x, short val_y)
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{
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short x,y;
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int x1,x2;
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if (!using_calibration)
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return (val_x<<16)|val_y;
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x1 = topleft.val_x; x2 = bottomright.val_x;
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x = (val_x-x1)*(bottomright.px_x - topleft.px_x) / (x2 - x1) + topleft.px_x;
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x1 = topleft.val_y; x2 = bottomright.val_y;
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y = (val_y-x1)*(bottomright.px_y - topleft.px_y) / (x2 - x1) + topleft.px_y;
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if (x < 0)
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x = 0;
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if (y < 0)
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y = 0;
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return (x<<16)|y;
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}
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void button_init_device(void)
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{
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last_touch = 0;
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/* GIO is the power button, set as input */
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IO_GIO_DIR0 |= 0x01;
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/* Enable the touchscreen interrupt */
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IO_INTC_EINT2 |= (1<<3); /* IRQ_GIO14 */
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#if 0
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tsc2100_writereg(TSADC_PAGE, TSADC_ADDRESS,
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TSADC_PSTCM|
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(0x2<<TSADC_ADSCM_SHIFT)| /* scan x,y,z1,z2 */
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(0x1<<TSADC_RESOL_SHIFT) /* 8 bit resolution */
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);
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/* doesnt work for some reason...
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setting to 8bit would probably be better than the 12bit currently */
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#endif
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}
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inline bool button_hold(void)
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{
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return false;
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}
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#ifdef BOOTLOADER
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int button_get_last_touch(void)
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{
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int ret_val = last_touch;
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last_touch = 0;
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return ret_val;
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}
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#endif
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static void remote_heartbeat(void)
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{
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char data[5] = {0x11, 0x30, 0x11^0x30, 0x11+0x30, '\0'};
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uart1_puts(data);
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}
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int button_read_device(void)
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{
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char c;
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int i = 0;
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int btn = BUTTON_NONE;
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if (last_touch)
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btn |= BUTTON_TOUCHPAD;
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if ((IO_GIO_BITSET0&0x01) == 0)
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btn |= BUTTON_POWER;
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remote_heartbeat();
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while (uart1_getch(&c))
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{
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if (i==0 && (c == BUTTON_START_BYTE || c == BUTTON_START_BYTE2) )
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{
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i++;
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}
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else if (i)
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{
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i++;
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if(i==2)
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{
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if (c& (1<<7))
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btn |= BUTTON_RC_HEART;
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if (c& (1<<6))
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btn |= BUTTON_RC_MODE;
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if (c& (1<<5))
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btn |= BUTTON_RC_VOL_DOWN;
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if (c& (1<<4))
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btn |= BUTTON_RC_VOL_UP;
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if (c& (1<<3))
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btn |= BUTTON_RC_REW;
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if (c& (1<<2))
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btn |= BUTTON_RC_FF;
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if (c& (1<<1))
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btn |= BUTTON_RC_DOWN;
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if (c& (1<<0))
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btn |= BUTTON_RC_PLAY;
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}
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else if(i==5)
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{
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i=0;
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}
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}
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}
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return btn;
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}
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void GIO14(void)
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{
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tsc2100_read_values(&last_x, &last_y,
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&last_z1, &last_z2);
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last_touch = touch_to_pixels(last_x, last_y);
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IO_INTC_IRQ2 = (1<<3);
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}
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