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uses the new timer registration of the plugin API, no hardware banging any more

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4565 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2004-04-30 21:13:49 +00:00
parent 664959aed4
commit e724b605f4
1 changed files with 3 additions and 34 deletions
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37
apps/plugins/mandelbrot.c
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@ -66,8 +66,6 @@ static unsigned int gbuf_size = 0;
* you're doing.
*/
#define IMIA4 (*((volatile unsigned long*)0x09000180)) /* timer 4 */
#define GRAY_RUNNING 0x0001 /* grayscale overlay is running */
#define GRAY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */
@ -91,44 +89,15 @@ static tGraybuf *graybuf = NULL;
/** prototypes **/
void timer_set(unsigned period);
void timer4_isr(void) __attribute__((interrupt_handler));
void timer4_isr(void);
void graypixel(int x, int y, unsigned long pattern);
void grayinvertmasked(int x, int yb, unsigned char mask);
/** implementation **/
/* setup ISR and timer registers */
void timer_set(unsigned period)
{
if (period)
{
and_b(~0x10, &TSTR); /* Stop the timer 4 */
and_b(~0x10, &TSNC); /* No synchronization */
and_b(~0x10, &TMDR); /* Operate normally */
IMIA4 = (unsigned long) timer4_isr; /* install ISR */
and_b(~0x01, &TSR4);
TIER4 = 0xF9; /* Enable GRA match interrupt */
GRA4 = (unsigned short)(period/4 - 1);
TCR4 = 0x22; /* clear at GRA match, sysclock/4 */
IPRD = (IPRD & 0xFF0F) | 0x0010; /* interrupt priority 1 (lowest) */
or_b(0x10, &TSTR); /* start timer 4 */
}
else
{
and_b(~0x10, &TSTR); /* stop the timer 4 */
IPRD = (IPRD & 0xFF0F); /* disable interrupt */
}
}
/* timer interrupt handler: display next bitplane */
void timer4_isr(void) /* IMIA4 */
{
and_b(~0x01, &TSR4); /* clear the interrupt */
rb->lcd_blit(graybuf->data + (graybuf->plane_size * graybuf->cur_plane),
graybuf->x, graybuf->by, graybuf->width, graybuf->bheight,
graybuf->width);
@ -505,11 +474,11 @@ void gray_show_display(bool enable)
if (enable)
{
graybuf->flags |= GRAY_RUNNING;
timer_set(FREQ / 67);
rb->plugin_register_timer(FREQ / 67, 1, timer4_isr);
}
else
{
timer_set(0);
rb->plugin_unregister_timer();
graybuf->flags &= ~GRAY_RUNNING;
rb->lcd_update(); /* restore whatever there was before */
}