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nicer handling of button_flip(), swap stored value, too, and avoid race condition

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4184 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2004-01-01 18:33:52 +00:00
parent 74976c1484
commit fa3f60ff1c
1 changed files with 21 additions and 11 deletions
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32
firmware/drivers/button.c
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@ -34,6 +34,7 @@
struct event_queue button_queue;
long last_keypress;
static int lastbtn;
#ifdef HAVE_RECORDER_KEYPAD
static bool flipped; /* bottons can be flipped to match the LCD flip */
#endif
@ -59,7 +60,6 @@ static void button_tick(void)
{
static int tick = 0;
static int count = 0;
static int lastbtn = 0;
static int repeat_speed = REPEAT_INTERVAL_START;
static int repeat_count = 0;
static bool repeat = false;
@ -214,22 +214,13 @@ void button_init()
PBIOR &= ~(PBDR_BTN_ON|PBDR_BTN_OFF); /* Inputs */
#endif
queue_init(&button_queue);
lastbtn = 0;
tick_add_task(button_tick);
last_keypress = current_tick;
flipped = false;
}
/*
* set the flip attribute
* better only call this when the queue is empty
*/
void button_set_flip(bool flip)
{
flipped = flip;
}
/*
* helper function to swap UP/DOWN, LEFT/RIGHT, F1/F3
*/
@ -258,6 +249,23 @@ static int button_flip(int button)
return newbutton;
}
/*
* set the flip attribute
* better only call this when the queue is empty
*/
void button_set_flip(bool flip)
{
if (flip != flipped) /* not the curent setting */
{
cli(); /* avoid race condition with the button_tick() */
lastbtn = button_flip(lastbtn);
flipped = flip;
sti();
}
}
/*
* Get button pressed from hardware
*/
@ -347,6 +355,7 @@ void button_init(void)
/* set port pins as input */
PAIOR &= ~0x820;
queue_init(&button_queue);
lastbtn = 0;
tick_add_task(button_tick);
last_keypress = current_tick;
@ -383,6 +392,7 @@ void button_init(void)
PAIOR &= ~0x4000; //PA14 for stop button
queue_init(&button_queue);
lastbtn = 0;
tick_add_task(button_tick);
last_keypress = current_tick;