+++ /dev/null
-/*!
- * \file
- * <!--
- * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
- * Copyright 1999, 2003 Bernardo Innocenti
- * This file is part of DevLib - See README.devlib for information.
- * -->
- *
- * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
- * \author Stefano Fedrigo <aleph@develer.com>
- * \author Francesco Sacchi <batt@develer.com>
- *
- * \brief Keyboard driver (implementation)
- */
-
-/*#*
- *#* $Log$
- *#* Revision 1.3 2006/02/17 21:15:42 bernie
- *#* Add MOD_CHECK() checks.
- *#*
- *#* Revision 1.2 2006/02/10 12:36:20 bernie
- *#* Add preliminary FreeRTOS support; Enforce CONFIG_* definitions.
- *#*
- *#* Revision 1.1 2005/06/27 21:28:45 bernie
- *#* Import generic keyboard driver.
- *#*
- *#*/
-
-#include <hw_kbd.h>
-
-#include <drv/timer.h>
-#include <drv/kbd.h>
-#include <drv/buzzer.h>
-
-#include <cfg/debug.h>
-#include <cfg/module.h>
-
-/* Configuration sanity checks */
-#if !defined(CONFIG_KBD_POLL) || (CONFIG_KBD_POLL != KBD_POLL_SOFTINT && CONFIG_KBD_POLL != CONFIG_POLL_FREERTOS)
- #error CONFIG_KBD_POLL must be defined to either KBD_POLL_SOFTINT or CONFIG_POLL_FREERTOS
-#endif
-
-
-#define KBD_CHECK_INTERVAL 10 /*!< (ms) Timing for kbd softint */
-#define KBD_DEBOUNCE_TIME 30 /*!< (ms) Debounce time */
-#define KBD_BEEP_TIME 5 /*!< (ms) Duration of keybeep */
-
-#define KBD_REPEAT_DELAY 400 /*!< (ms) Keyboard repeat delay for first character */
-#define KBD_REPEAT_RATE 100 /*!< (ms) Initial interchar delay for keyboard repeat */
-#define KBD_REPEAT_MAXRATE 20 /*!< (ms) Minimum delay for keyboard repeat */
-#define KBD_REPEAT_ACCEL 5 /*!< (ms) Keyboard repeat speed increase */
-
-#define KBD_LNG_DELAY 1000 /*!< (ms) Keyboard long pression keys delay */
-
-
-/*! Status for keyboard repeat state machine */
-static enum { KS_IDLE, KS_REPDELAY, KS_REPEAT } kbd_rptStatus;
-
-
-static volatile keymask_t kbd_buf; /*!< Single entry keyboard buffer */
-static volatile keymask_t kbd_cnt; /*!< Number of keypress events in \c kbd_buf */
-
-static Timer kbd_timer; /*!< Keyboard softtimer */
-
-static List kbd_rawHandlers; /*!< Raw keyboard handlers */
-static List kbd_handlers; /*!< Cooked keyboard handlers */
-
-static KbdHandler kbd_defHandler; /*!< The default keyboard handler */
-static KbdHandler kbd_debHandler; /*!< The debounce keyboard handler */
-static KbdHandler kbd_rptHandler; /*!< Auto-repeat keyboard handler */
-#ifdef K_LNG_MASK
-static KbdHandler kbd_lngHandler; /*!< Long pression keys handler */
-#endif
-
-
-
-/*!
- * Poll keyboard and dispatch keys to handlers.
- *
- * Read the key states and invoke all keyboard
- * handlers to process the new state.
- *
- * Call this function periodically using a software
- * timer, an interrupt or a process.
- */
-static void kbd_poll(void)
-{
- /*! Currently depressed key */
- static keymask_t current_key;
-
- struct KbdHandler *handler;
- keymask_t key = kbd_readkeys();
-
- /* Call raw input handlers */
- FOREACHNODE(handler, &kbd_rawHandlers)
- key = handler->hook(key);
-
- /* If this key was not previously pressed */
- if (key != current_key)
- {
- /* Remember last key */
- current_key = key;
-
- /* Call cooked input handlers */
- FOREACHNODE(handler, &kbd_handlers)
- key = handler->hook(key);
- }
-}
-
-#if CONFIG_KBD_POLL == KBD_POLL_SOFTINT
-
-/*!
- * Keyboard soft-irq handler.
- */
-static void kbd_softint(UNUSED_ARG(iptr_t, arg))
-{
- kbd_poll();
- timer_add(&kbd_timer);
-}
-
-#elif CONFIG_KBD_POLL == CONFIG_POLL_FREERTOS
-
-#include "FreeRTOS.h"
-#include "task.h"
-
-static portTASK_FUNCTION(kbd_poll, arg)
-{
- for (;;)
- {
- kbd_poll(0);
- timer_delay(KBD_CHECK_INTERVAL);
- }
-}
-
-#endif /* CONFIG_KBD_POLL */
-
-/*!
- * \brief Read a key from the keyboard buffer.
- *
- * When a key is kept depressed between calls of this function a value
- * is returned only after the time specified with KBD_REPAT_DELAY to
- * avoid too fast keyboard repeat.
- *
- * \note This function is \b not interrupt safe!
- *
- * \return The mask of depressed keys or 0 if no keys are depressed.
- *
- */
-keymask_t kbd_peek(void)
-{
- keymask_t key = 0;
-
-// FIXME
- extern void schedule(void);
- schedule();
-
- /* Extract an event from the keyboard buffer */
- IRQ_DISABLE;
- if (kbd_cnt)
- {
- --kbd_cnt;
- key = kbd_buf;
- }
- IRQ_ENABLE;
-
- return key;
-}
-
-
-/*!
- * Wait for a keypress and return the mask of depressed keys.
- *
- * \note This function is \b not interrupt safe!
- */
-keymask_t kbd_get(void)
-{
- keymask_t key;
-
- while (!(key = kbd_peek())) {}
- return key;
-}
-
-
-/*!
- * Wait up to \c timeout ms for a keypress
- * and return the mask of depressed keys, or K_TIMEOUT
- * if the timeout was reacked.
- */
-keymask_t kbd_get_timeout(mtime_t timeout)
-{
- keymask_t key;
-
- ticks_t start = timer_clock();
- ticks_t stop = ms_to_ticks(timeout);
- do
- {
- if ((key = kbd_peek()))
- return key;
- }
- while (timer_clock() - start < stop);
-
- return K_TIMEOUT;
-}
-
-
-void kbd_addHandler(struct KbdHandler *handler)
-{
- KbdHandler *node;
- List *list;
-
- cpuflags_t flags;
- IRQ_SAVE_DISABLE(flags);
-
- /* Choose between raw and coocked handlers list */
- list = (handler->flags & KHF_RAWKEYS) ?
- &kbd_rawHandlers : &kbd_handlers;
-
- /*
- * Search for the first node whose priority
- * is lower than the timer we want to add.
- */
- FOREACHNODE(node,list)
- if (node->pri < handler->pri)
- break;
-
- /* Enqueue handler in the handlers chain */
- INSERTBEFORE(&handler->link, &node->link);
-
- IRQ_RESTORE(flags);
-}
-
-
-void kbd_remHandler(struct KbdHandler *handler)
-{
- /* Remove the handler */
- ATOMIC(REMOVE(&handler->link));
-}
-
-
-/*!
- * This is the default key handler, called after
- * all other handlers have had their chance to
- * do their special processing. This handler
- * pushes all input in the keyboard FIFO buffer.
- */
-static keymask_t kbd_defHandlerFunc(keymask_t key)
-{
- if (key)
- {
- /* Force a single event in kbd buffer */
- kbd_buf = key;
- kbd_cnt = 1;
-
-#if KBD_BEEP_TIME
- if (!(key & K_REPEAT))
- buz_beep(KBD_BEEP_TIME);
-#endif
- }
-
- /* Eat all input */
- return 0;
-}
-
-/*!
- * Handle keyboard debounce
- */
-static keymask_t kbd_debHandlerFunc(keymask_t key)
-{
- /*! Buffer for debounce */
- static keymask_t debounce_key;
-
- /*! Timer for keyboard debounce */
- static ticks_t debounce_time;
-
- /*! Key aquired after debounce */
- static keymask_t new_key;
-
-
- ticks_t now = timer_clock();
-
- if (key != debounce_key)
- {
- /* Reset debounce timer */
- debounce_key = key;
- debounce_time = now;
- }
- else if ((new_key != debounce_key)
- && (now - debounce_time > ms_to_ticks(KBD_DEBOUNCE_TIME)))
- {
- new_key = debounce_key;
- debounce_time = now;
- }
-
- return new_key;
-}
-
-#ifdef K_LNG_MASK
-/*!
- * Handle long pression keys
- */
-static keymask_t kbd_lngHandlerFunc(keymask_t key)
-{
- static ticks_t stop;
- ticks_t now = timer_clock();
-
- if (key & K_LNG_MASK)
- {
- if (now - stop > 0)
- key &= K_LNG_MASK;
- else
- key &= ~K_LNG_MASK;
- }
- else
- stop = now + ms_to_ticks(KBD_LNG_DELAY);
- return key;
-}
-#endif
-
-/*!
- * Handle keyboard repeat
- */
-static keymask_t kbd_rptHandlerFunc(keymask_t key)
-{
- /*! Timer for keyboard repeat events */
- static ticks_t repeat_time;
-
- static ticks_t repeat_rate; /*! Current repeat rate (for acceleration) */
-
- ticks_t now = timer_clock();
-
- switch (kbd_rptStatus)
- {
- case KS_IDLE:
- if (key & K_RPT_MASK)
- {
- repeat_time = now;
- kbd_rptStatus = KS_REPDELAY;
- }
- break;
-
- case KS_REPDELAY:
- if (key & K_RPT_MASK)
- {
- if (now - repeat_time > ms_to_ticks(KBD_REPEAT_DELAY))
- {
- key = (key & K_RPT_MASK) | K_REPEAT;
- repeat_time = now;
- repeat_rate = ms_to_ticks(KBD_REPEAT_RATE);
- kbd_rptStatus = KS_REPEAT;
- }
- else
- key = 0;
- }
- else
- kbd_rptStatus = KS_IDLE;
- break;
-
- case KS_REPEAT:
- if (key & K_RPT_MASK)
- {
- if (now - repeat_time > repeat_rate)
- {
- /* Enqueue a new event in the buffer */
- key = (key & K_RPT_MASK) | K_REPEAT;
- repeat_time = now;
-
- /* Repeat rate acceleration */
- if (repeat_rate > ms_to_ticks(KBD_REPEAT_MAXRATE))
- repeat_rate -= ms_to_ticks(KBD_REPEAT_ACCEL);
- }
- else
- key = 0;
- }
- else
- kbd_rptStatus = KS_IDLE;
-
- break;
- }
-
- return key;
-}
-
-
-MOD_DEFINE(kbd)
-
-/*!
- * Initialize keyboard ports and softtimer
- */
-void kbd_init(void)
-{
- MOD_CHECK(buzzer);
-
- KBD_HW_INIT;
-
- /* Init handlers lists */
- LIST_INIT(&kbd_handlers);
- LIST_INIT(&kbd_rawHandlers);
-
- /* Add debounce keyboard handler */
- kbd_debHandler.hook = kbd_debHandlerFunc;
- kbd_debHandler.pri = 100; /* high priority */
- kbd_debHandler.flags = KHF_RAWKEYS;
- kbd_addHandler(&kbd_debHandler);
-
- #ifdef K_LNG_MASK
- /* Add long pression keyboard handler */
- kbd_lngHandler.hook = kbd_lngHandlerFunc;
- kbd_lngHandler.pri = 90; /* high priority */
- kbd_lngHandler.flags = KHF_RAWKEYS;
- kbd_addHandler(&kbd_lngHandler);
- #endif
-
- /* Add repeat keyboard handler */
- kbd_rptHandler.hook = kbd_rptHandlerFunc;
- kbd_rptHandler.pri = 80; /* high priority */
- kbd_rptHandler.flags = KHF_RAWKEYS;
- kbd_addHandler(&kbd_rptHandler);
-
- /* Add default keyboard handler */
- kbd_defHandler.hook = kbd_defHandlerFunc;
- kbd_defHandler.pri = -128; /* lowest priority */
- kbd_addHandler(&kbd_defHandler);
-
-#if CONFIG_KBD_POLL == KBD_POLL_SOFTINT
-
- MOD_CHECK(timer);
-
- /* Add kbd handler to soft timers list */
- event_initSoftInt(&kbd_timer.expire, kbd_softint, 0);
- timer_setDelay(&kbd_timer, ms_to_ticks(KBD_CHECK_INTERVAL));
- timer_add(&kbd_timer);
-
-#elif CONFIG_KBD_POLL == CONFIG_POLL_FREERTOS
-
- /* Create a timer specific thread */
- xTaskCreate(kbd_poll, "kbd_poll", CONFIG_STACK_KBD,
- NULL, CONFIG_PRI_KBD, NULL);
-
-#else
- #error "Define keyboard poll method"
-#endif
-
- MOD_INIT(kbd);
-}
projects / bertos.git / blobdiff