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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@220 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-04-25 00:15:04 +00:00
parent 99406a6635
commit 7b9581a131
5 changed files with 49 additions and 41 deletions
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18
firmware/test/kernel/timer.c
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@ -19,6 +19,7 @@
#include "sh7034.h"
#include "system.h"
#include "debug.h"
#include "kernel.h"
void tick_start(unsigned int interval_in_ms)
{
@ -26,6 +27,7 @@ void tick_start(unsigned int interval_in_ms)
count = FREQ / 1000 / 8 * interval_in_ms;
debugf("count = %d\n", count);
if(count > 0xffff)
{
debugf("Error! The tick interval is too long (%d ms)\n",
@ -40,24 +42,22 @@ void tick_start(unsigned int interval_in_ms)
TMDR &= ~0x01; /* Operate normally */
TCNT0 = 0; /* Start counting at 0 */
GRA0 = 0xfff0;
GRA0 = count;
TCR0 = 0x23; /* Clear at GRA match, sysclock/8 */
TSTR |= 0x01; /* Start timer 1 */
/* Enable interrupt on level 1 */
IPRC = (IPRC & ~0x00f0) | 0x0010;
TIER0 |= 0x01; /* Enable GRA match interrupt */
while(1)
{
}
TSR0 &= ~0x01;
TIER0 |= 0x01; /* Enable GRA match interrupt */
TSTR |= 0x01; /* Start timer 1 */
}
#pragma interrupt
void IMIA0(void)
{
current_tick++;
TSR0 &= ~0x01;
debugf("Yes\n");
}