diff options
Diffstat (limited to 'ecos/packages/devs/touch/arm/ipaq/current/src/ipaq_ts.c')
| -rw-r--r-- | ecos/packages/devs/touch/arm/ipaq/current/src/ipaq_ts.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/ecos/packages/devs/touch/arm/ipaq/current/src/ipaq_ts.c b/ecos/packages/devs/touch/arm/ipaq/current/src/ipaq_ts.c new file mode 100644 index 0000000..7e268a8 --- /dev/null +++ b/ecos/packages/devs/touch/arm/ipaq/current/src/ipaq_ts.c @@ -0,0 +1,282 @@ +//========================================================================== +// +// 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 Free Software Foundation, 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., +// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2. +// +// This exception does not invalidate any other reasons why a work based +// on this file might be covered by the GNU General Public 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; +} |