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    /or1k/trunk/ecos-2.0/packages/devs/touch/arm
    from Rev 1254 to Rev 1765
    ↔ Reverse comparison
  •

Rev 1254 → Rev 1765

/ipaq/v2_0/cdl/touch_ipaq.cdl
0,0 → 1,100
#==========================================================================
#
# touch_ipaq.cdl
#
# eCos configuration data for the Compaq iPAQ touchscreen
#
#==========================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
## This exception does not invalidate any other reasons why a work based on
## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
#==========================================================================
######DESCRIPTIONBEGIN####
#
# Author(s): gthomas
# Contributors: gthomas
# Date: 2001-03-05
# Purpose:
# Description: Touchscreen drivers for Compaq iPAQ
#
#####DESCRIPTIONEND####
#
#==========================================================================
 
cdl_package CYGPKG_DEVS_TOUCH_IPAQ {
display "Touch screen driver for iPAQ"
include_dir cyg/io
 
active_if CYGPKG_IO_FILEIO
requires CYGPKG_IO
requires CYGFUN_KERNEL_API_C
requires CYGPKG_HAL_ARM_SA11X0_IPAQ
active_if !CYGSEM_IPAQ_LCD_COMM
 
compile -library=libextras.a ipaq_ts.c
 
description "Touch screen driver for the iPAQ using the Atmel micro-controller"
 
cdl_component CYGPKG_DEVS_TOUCH_IPAQ_OPTIONS {
display "options"
flavor none
no_define
 
cdl_option CYGPKG_DEVS_TOUCH_IPAQ_CFLAGS {
display "Additional compiler flags"
flavor data
no_define
default_value { "" }
description "
This option modifies the set of compiler flags for
building the touchscreen driver package. These flags
are used in addition to the set of global flags."
}
 
cdl_option CYGDAT_DEVS_TOUCH_IPAQ_NAME {
display "Device name for the touch screen driver"
flavor data
default_value {"\"/dev/ts\""}
description " This option specifies the name of the touch screen device"
}
 
cdl_option CYGNUM_DEVS_TOUCH_IPAQ_EVENT_BUFFER_SIZE {
display "Number of events the driver can buffer"
flavor data
default_value { 32 }
description "
This option defines the size of the touchscreen device internal
buffer. The cyg_io_read() function will return as many of these
as there is space for in the buffer passed."
}
}
}
/ipaq/v2_0/ChangeLog
0,0 → 1,55
2001-08-29 Kenichi Nakamura <nakamura@redhat.com>
 
* cdl/touch_ipaq.cdl: Modified dependency on file I/O package.
 
2001-04-24 Gary Thomas <gthomas@redhat.com>
 
* cdl/touch_ipaq.cdl: Add dependency on file I/O package.
 
2001-03-06 Gary Thomas <gthomas@redhat.com>
 
* src/ipaq_ts.c: Fully interrupt driven mode, including select()
support. Note: scaling for the touch screen is self calibrating.
 
* cdl/touch_ipaq.cdl: Remove unused option for repeat interval.
Repeat is automatic from the Atmel micro-controller.
 
2001-03-05 Gary Thomas <gthomas@redhat.com>
 
* src/ipaq_ts.c:
* cdl/touch_ipaq.cdl: New file(s). iPAQ touch screen driver.
 
//===========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//===========================================================================
/ipaq/v2_0/src/ipaq_ts.c
0,0 → 1,283
//==========================================================================
//
// ipaq_ts.c
//
// Touchscreen driver for the Compaq iPAQ
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): gthomas
// Contributors: gthomas
// Date: 2001-03-05
// Purpose:
// Description: Touchscreen driver for Compaq IPAQ
//
//####DESCRIPTIONEND####
//
//==========================================================================
 
 
#include <pkgconf/devs_touch_ipaq.h>
 
#include <cyg/kernel/kapi.h>
#include <cyg/hal/hal_io.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_intr.h>
#include <cyg/hal/hal_sa11x0.h>
#include <cyg/hal/ipaq.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
 
#include <cyg/fileio/fileio.h> // For select() functionality
static cyg_selinfo ts_select_info;
static cyg_bool ts_select_active;
 
#include <cyg/io/devtab.h>
#include <cyg/hal/atmel_support.h>
 
// Functions in this module
 
static Cyg_ErrNo ts_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len);
static cyg_bool ts_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info);
static Cyg_ErrNo ts_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len);
static Cyg_ErrNo ts_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len);
static bool ts_init(struct cyg_devtab_entry *tab);
static Cyg_ErrNo ts_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name);
 
CHAR_DEVIO_TABLE(ipaq_ts_handlers,
NULL, // Unsupported write() function
ts_read,
ts_select,
ts_get_config,
ts_set_config);
 
CHAR_DEVTAB_ENTRY(ipaq_ts_device,
CYGDAT_DEVS_TOUCH_IPAQ_NAME,
NULL, // Base device name
&ipaq_ts_handlers,
ts_init,
ts_lookup,
NULL); // Private data pointer
 
struct _event {
short button_state;
short xPos, yPos;
short _unused;
};
#define MAX_EVENTS CYGNUM_DEVS_TOUCH_IPAQ_EVENT_BUFFER_SIZE
static int num_events;
static int _event_put, _event_get;
static bool pen_down = false;
static struct _event _events[MAX_EVENTS];
 
static bool _is_open = false;
#ifdef DEBUG_RAW_EVENTS
static unsigned char _ts_buf[512];
static int _ts_buf_ptr = 0;
#endif
 
//
// Note: this routine is called from the Atmel processing DSR
//
static void
ts_handler(atmel_pkt *pkt)
{
unsigned char *dp = pkt->data;
static short lastX, lastY;
short x, y;
struct _event *ev;
 
#ifdef DEBUG_RAW_EVENTS
memcpy(&_ts_buf[_ts_buf_ptr], pkt->data, 8);
_ts_buf_ptr += 8;
if (_ts_buf_ptr == 512) {
diag_printf("TS handler\n");
diag_dump_buf(_ts_buf, 512);
_ts_buf_ptr = 0;
}
#endif
// Try and interpret the mouse data
if ((dp[0] & 0x0F) == 0) {
// This is a pen up event
x = lastX;
y = lastY;
pen_down = false;
} else {
// Some sort of event with the pen down
x = lastX = (dp[1] << 8) | dp[2];
y = lastY = (dp[3] << 8) | dp[4];
pen_down = true;
}
if (num_events < MAX_EVENTS) {
num_events++;
ev = &_events[_event_put++];
if (_event_put == MAX_EVENTS) {
_event_put = 0;
}
ev->button_state = pen_down ? 0x04 : 0x00;
ev->xPos = x;
ev->yPos = y;
if (ts_select_active) {
ts_select_active = false;
cyg_selwakeup(&ts_select_info);
}
}
}
 
typedef struct {
short min;
short max;
short span;
} bounds;
 
static bounds xBounds = {1024, 0, 1024};
static bounds yBounds = {1024, 0, 1024};
 
static Cyg_ErrNo
ts_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len)
{
struct _event *ev;
int tot = *len;
unsigned char *bp = (unsigned char *)buffer;
 
cyg_scheduler_lock(); // Prevent interaction with DSR code
while (tot >= sizeof(struct _event)) {
if (num_events > 0) {
ev = &_events[_event_get++];
if (_event_get == MAX_EVENTS) {
_event_get = 0;
}
// Self calibrate
if (ev->xPos > xBounds.max) xBounds.max = ev->xPos;
if (ev->xPos < xBounds.min) xBounds.min = ev->xPos;
if (ev->yPos > yBounds.max) yBounds.max = ev->yPos;
if (ev->yPos < yBounds.min) yBounds.min = ev->yPos;
if ((xBounds.span = xBounds.max - xBounds.min) <= 1) {
xBounds.span = 1;
}
if ((yBounds.span = yBounds.max - yBounds.min) <= 1) {
yBounds.span = 1;
}
// Scale values - done here so these potentially lengthy
// operations take place outside of interrupt processing
ev->xPos = ((xBounds.max - ev->xPos) * 320) / xBounds.span;
ev->yPos = ((yBounds.max - ev->yPos) * 240) / yBounds.span;
memcpy(bp, ev, sizeof(*ev));
bp += sizeof(*ev);
tot -= sizeof(*ev);
num_events--;
} else {
break; // No more events
}
}
cyg_scheduler_unlock(); // Allow DSRs again
*len -= tot;
return ENOERR;
}
 
static cyg_bool
ts_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info)
{
if (which == CYG_FREAD) {
cyg_scheduler_lock(); // Prevent interaction with DSR code
if (num_events > 0) {
cyg_scheduler_unlock(); // Reallow interaction with DSR code
return true;
}
if (!ts_select_active) {
ts_select_active = true;
cyg_selrecord(info, &ts_select_info);
}
cyg_scheduler_unlock(); // Reallow interaction with DSR code
}
return false;
}
 
static Cyg_ErrNo
ts_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
 
static Cyg_ErrNo
ts_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
 
static bool
ts_init(struct cyg_devtab_entry *tab)
{
cyg_selinit(&ts_select_info);
return true;
}
 
static Cyg_ErrNo
ts_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name)
{
if (!_is_open) {
_is_open = true;
atmel_register(ATMEL_CMD_TOUCH, ts_handler);
atmel_interrupt_mode(true);
}
return ENOERR;
}
/aaed2000/v2_0/touch_aaed2000.cdl
0,0 → 1,100
#==========================================================================
#
# touch_aaed2000.cdl
#
# eCos configuration data for the Agilent AAED2000 touchscreen
#
#==========================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
## This exception does not invalidate any other reasons why a work based on
## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
#==========================================================================
######DESCRIPTIONBEGIN####
#
# Author(s): gthomas
# Contributors: gthomas
# Date: 2002-03-03
# Purpose:
# Description: Touchscreen drivers for Agilent AAED2000
#
#####DESCRIPTIONEND####
#
#==========================================================================
 
cdl_package CYGPKG_DEVS_TOUCH_AAED2000 {
display "Touch screen driver for aaed2000"
include_dir cyg/io
 
active_if CYGPKG_IO_FILEIO
requires CYGPKG_IO
requires CYGFUN_KERNEL_API_C
requires CYGPKG_HAL_ARM_ARM9_AAED2000
active_if !CYGSEM_AAED2000_LCD_COMM
 
compile -library=libextras.a aaed2000_ts.c
 
description "Touch screen driver for the AAED2000"
 
cdl_component CYGPKG_DEVS_TOUCH_AAED2000_OPTIONS {
display "options"
flavor none
no_define
 
cdl_option CYGPKG_DEVS_TOUCH_AAED2000_CFLAGS {
display "Additional compiler flags"
flavor data
no_define
default_value { "" }
description "
This option modifies the set of compiler flags for
building the touchscreen driver package. These flags
are used in addition to the set of global flags."
}
 
cdl_option CYGDAT_DEVS_TOUCH_AAED2000_NAME {
display "Device name for the touch screen driver"
flavor data
default_value {"\"/dev/ts\""}
description " This option specifies the name of the touch screen device"
}
 
cdl_option CYGNUM_DEVS_TOUCH_AAED2000_EVENT_BUFFER_SIZE {
display "Number of events the driver can buffer"
flavor data
default_value { 32 }
description "
This option defines the size of the touchscreen device internal
buffer. The cyg_io_read() function will return as many of these
as there is space for in the buffer passed."
}
}
}
/aaed2000/v2_0/ChangeLog
0,0 → 1,43
2002-03-10 Gary Thomas <gthomas@redhat.com>
 
* src/aaed2000_ts.c: Update scan frequency to 20Hz.
 
2002-03-09 Gary Thomas <gthomas@redhat.com>
 
* src/aaed2000_ts.c:
* touch_aaed2000.cdl: New files(s). Touch screen driver for AAED2000.
 
//===========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//===========================================================================
/aaed2000/v2_0/src/aaed2000_ts.c
0,0 → 1,369
//==========================================================================
//
// aaed2000_ts.c
//
// Touchscreen driver for the Agilent aaed2000
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): gthomas
// Contributors: gthomas
// Date: 2002-03-05
// Purpose:
// Description: Touchscreen driver for Agilent AAED2000
//
//####DESCRIPTIONEND####
//
//==========================================================================
 
 
#include <pkgconf/devs_touch_aaed2000.h>
 
#include <cyg/kernel/kapi.h>
#include <cyg/hal/hal_io.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_intr.h>
#include <cyg/hal/aaed2000.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
#include <cyg/infra/diag.h>
 
#include <cyg/fileio/fileio.h> // For select() functionality
static cyg_selinfo ts_select_info;
static cyg_bool ts_select_active;
 
#include <cyg/io/devtab.h>
 
/* ADS7846 flags */
#define ADS_START (1 << 7)
#define ADS_MEASURE_Y (0x01 << 4)
#define ADS_MEASURE_X (0x05 << 4)
#define ADS_MODE_12_BIT 0
#define ADS_PD0 0
 
// Misc constants
#define TS_INT (1<<0)
#define X_THRESHOLD 0x80
#define Y_THRESHOLD 0x80
 
// Functions in this module
 
static Cyg_ErrNo ts_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len);
static cyg_bool ts_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info);
static Cyg_ErrNo ts_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len);
static Cyg_ErrNo ts_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len);
static bool ts_init(struct cyg_devtab_entry *tab);
static Cyg_ErrNo ts_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name);
 
CHAR_DEVIO_TABLE(aaed2000_ts_handlers,
NULL, // Unsupported write() function
ts_read,
ts_select,
ts_get_config,
ts_set_config);
 
CHAR_DEVTAB_ENTRY(aaed2000_ts_device,
CYGDAT_DEVS_TOUCH_AAED2000_NAME,
NULL, // Base device name
&aaed2000_ts_handlers,
ts_init,
ts_lookup,
NULL); // Private data pointer
 
struct _event {
short button_state;
short xPos, yPos;
short _unused;
};
#define MAX_EVENTS CYGNUM_DEVS_TOUCH_AAED2000_EVENT_BUFFER_SIZE
static int num_events;
static int _event_put, _event_get;
static struct _event _events[MAX_EVENTS];
 
static bool _is_open = false;
#ifdef DEBUG_RAW_EVENTS
static unsigned char _ts_buf[512];
static int _ts_buf_ptr = 0;
#endif
 
#define STACK_SIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
static char ts_scan_stack[STACK_SIZE];
static cyg_thread ts_scan_thread_data;
static cyg_handle_t ts_scan_thread_handle;
#define SCAN_FREQ 20 // Hz
//#define SCAN_FREQ 5 // Hz
#define SCAN_DELAY ((1000/SCAN_FREQ)/10)
 
 
typedef struct {
short min;
short max;
short span;
} bounds;
 
static bounds xBounds = {1024, 0, 1024};
static bounds yBounds = {1024, 0, 1024};
 
static Cyg_ErrNo
ts_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len)
{
struct _event *ev;
int tot = *len;
unsigned char *bp = (unsigned char *)buffer;
 
cyg_scheduler_lock(); // Prevent interaction with DSR code
while (tot >= sizeof(struct _event)) {
if (num_events > 0) {
ev = &_events[_event_get++];
if (_event_get == MAX_EVENTS) {
_event_get = 0;
}
// Self calibrate
if (ev->xPos > xBounds.max) xBounds.max = ev->xPos;
if (ev->xPos < xBounds.min) xBounds.min = ev->xPos;
if (ev->yPos > yBounds.max) yBounds.max = ev->yPos;
if (ev->yPos < yBounds.min) yBounds.min = ev->yPos;
if ((xBounds.span = xBounds.max - xBounds.min) <= 1) {
xBounds.span = 1;
}
if ((yBounds.span = yBounds.max - yBounds.min) <= 1) {
yBounds.span = 1;
}
// Scale values - done here so these potentially lengthy
// operations take place outside of interrupt processing
#ifdef DEBUG
diag_printf("Raw[%d,%d], X[%d,%d,%d], Y[%d,%d,%d]",
ev->xPos, ev->yPos,
xBounds.max, xBounds.min, xBounds.span,
yBounds.max, yBounds.min, yBounds.span);
#endif
ev->xPos = 640 - (((xBounds.max - ev->xPos) * 640) / xBounds.span);
ev->yPos = 480 - (((yBounds.max - ev->yPos) * 480) / yBounds.span);
#ifdef DEBUG
diag_printf(", Cooked[%d,%d]\n",
ev->xPos, ev->yPos);
#endif
memcpy(bp, ev, sizeof(*ev));
bp += sizeof(*ev);
tot -= sizeof(*ev);
num_events--;
} else {
break; // No more events
}
}
cyg_scheduler_unlock(); // Allow DSRs again
*len -= tot;
return ENOERR;
}
 
static cyg_bool
ts_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info)
{
if (which == CYG_FREAD) {
cyg_scheduler_lock(); // Prevent interaction with DSR code
if (num_events > 0) {
cyg_scheduler_unlock(); // Reallow interaction with DSR code
return true;
}
if (!ts_select_active) {
ts_select_active = true;
cyg_selrecord(info, &ts_select_info);
}
cyg_scheduler_unlock(); // Reallow interaction with DSR code
}
return false;
}
 
static Cyg_ErrNo
ts_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
 
static Cyg_ErrNo
ts_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
 
static bool
ts_init(struct cyg_devtab_entry *tab)
{
cyg_uint32 _dummy;
 
// Initialize SSP interface
#if 0
while (*(volatile cyg_uint32 *)AAEC_SSP_SR & AAEC_SSP_SR_RNE) {
_dummy = *(volatile cyg_uint32 *)AAEC_SSP_DR; // Drain FIFO
}
#endif
*(volatile cyg_uint32 *)AAEC_SSP_CR0 =
(1 << AAEC_SSP_CR0_SSE) | // SSP enable
(37 << AAEC_SSP_CR0_SCR) | // Serial clock rate
(AAEC_SSP_CR0_FRF_NAT << AAEC_SSP_CR0_FRF) | // MicroWire
((12-1) << AAEC_SSP_CR0_SIZE); // 12 bit words
*(volatile cyg_uint32 *)AAEC_SSP_CR1 =
(1 << AAEC_SSP_CR1_FEN); // Enable FIFO
*(volatile cyg_uint32 *)AAEC_SSP_CPSR = 2; // Clock prescale
*(volatile cyg_uint32 *)AAEC_PFDDR &= ~(1<<0); // TS uses port F bit 0
cyg_drv_interrupt_acknowledge(CYGNUM_HAL_INTERRUPT_TS);
cyg_selinit(&ts_select_info);
return true;
}
 
static cyg_uint32
read_ts(int axis)
{
cyg_uint32 res;
 
*(volatile cyg_uint32 *)AAEC_SSP_DR = (axis | ADS_START | ADS_MODE_12_BIT | ADS_PD0);
*(volatile cyg_uint32 *)AAEC_SSP_DR = (axis | ADS_START | ADS_MODE_12_BIT);
// Wait for data
while ((*(volatile cyg_uint32 *)AAEC_SSP_SR & AAEC_SSP_SR_RNE) == 0);
res = *(volatile cyg_uint32 *)AAEC_SSP_DR; // ignore first datum
// Wait for data
while ((*(volatile cyg_uint32 *)AAEC_SSP_SR & AAEC_SSP_SR_RNE) == 0);
res = *(volatile cyg_uint32 *)AAEC_SSP_DR;
return res;
}
 
static void
ts_scan(cyg_addrword_t param)
{
short lastX, lastY;
short x, y;
struct _event *ev;
bool pen_down;
 
diag_printf("Touch Screen thread started\n");
// Discard the first sample - it's always 0
x = read_ts(ADS_MEASURE_X);
y = read_ts(ADS_MEASURE_Y);
lastX = lastY = -1;
pen_down = false;
while (true) {
cyg_thread_delay(SCAN_DELAY);
if ((*(volatile cyg_uint32 *)AAEC_PFDR & TS_INT) == 0) {
// Pen is down
x = read_ts(ADS_MEASURE_X);
y = read_ts(ADS_MEASURE_Y);
// diag_printf("X = %x, Y = %x\n", x, y);
if ((x < X_THRESHOLD) || (y < Y_THRESHOLD)) {
// Ignore 'bad' samples
continue;
}
lastX = x; lastY = y;
pen_down = true;
} else {
if (pen_down) {
// Capture first 'up' event
pen_down = false;
x = lastX;
y = lastY;
} else {
continue; // Nothing new to report
}
}
if (num_events < MAX_EVENTS) {
num_events++;
ev = &_events[_event_put++];
if (_event_put == MAX_EVENTS) {
_event_put = 0;
}
ev->button_state = pen_down ? 0x04 : 0x00;
ev->xPos = x;
ev->yPos = y;
if (ts_select_active) {
ts_select_active = false;
cyg_selwakeup(&ts_select_info);
}
}
#ifdef DEBUG_RAW_EVENTS
memcpy(&_ts_buf[_ts_buf_ptr], pkt->data, 8);
_ts_buf_ptr += 8;
if (_ts_buf_ptr == 512) {
diag_printf("TS handler\n");
diag_dump_buf(_ts_buf, 512);
_ts_buf_ptr = 0;
}
#endif
}
}
 
static Cyg_ErrNo
ts_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name)
{
if (!_is_open) {
_is_open = true;
cyg_thread_create(1, // Priority
ts_scan, // entry
0, // entry parameter
"Touch Screen scan", // Name
&ts_scan_stack[0], // Stack
STACK_SIZE, // Size
&ts_scan_thread_handle, // Handle
&ts_scan_thread_data // Thread data structure
);
cyg_thread_resume(ts_scan_thread_handle); // Start it
}
return ENOERR;
}

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