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Turn off Timer A before modifying its control registers to avoid problems when timer is updated frequently

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This commit is contained in:
adamdunkels 2010-01-18 21:17:11 +00:00
parent 5fc17c4f04
commit 2772d31ae6
2 changed files with 8 additions and 5 deletions
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7
cpu/msp430/clock.c
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@ -28,7 +28,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* @(#)$Id: clock.c,v 1.19 2009/12/09 12:55:35 adamdunkels Exp $ * @(#)$Id: clock.c,v 1.20 2010/01/18 21:17:11 adamdunkels Exp $
*/ */
@ -57,15 +57,15 @@ interrupt(TIMERA1_VECTOR) timera1 (void) {
if(TAIV == 2) { if(TAIV == 2) {
eint();
/* HW timer bug fix: Interrupt handler called before TR==CCR. /* HW timer bug fix: Interrupt handler called before TR==CCR.
* Occurrs when timer state is toggled between STOP and CONT. */ * Occurrs when timer state is toggled between STOP and CONT. */
while(TACTL & MC1 && TACCR1 - TAR == 1); while(TACTL & MC1 && TACCR1 - TAR == 1);
/* Make sure interrupt time is future */ /* Make sure interrupt time is future */
do { do {
TACTL &= ~MC1;
TACCR1 += INTERVAL; TACCR1 += INTERVAL;
TACTL |= MC1;
++count; ++count;
/* Make sure the CLOCK_CONF_SECOND is a power of two, to ensure /* Make sure the CLOCK_CONF_SECOND is a power of two, to ensure
@ -88,6 +88,7 @@ interrupt(TIMERA1_VECTOR) timera1 (void) {
etimer_request_poll(); etimer_request_poll();
LPM4_EXIT; LPM4_EXIT;
} }
} }
/* if(process_nevents() >= 0) { /* if(process_nevents() >= 0) {
LPM4_EXIT; LPM4_EXIT;

4
cpu/msp430/rtimer-arch.c
View File

@ -28,7 +28,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* $Id: rtimer-arch.c,v 1.11 2009/12/08 23:39:45 adamdunkels Exp $ * $Id: rtimer-arch.c,v 1.12 2010/01/18 21:17:11 adamdunkels Exp $
*/ */
/** /**
@ -82,5 +82,7 @@ rtimer_arch_schedule(rtimer_clock_t t)
{ {
PRINTF("rtimer_arch_schedule time %u\n", t); PRINTF("rtimer_arch_schedule time %u\n", t);
TACTL &= ~MC1;
TACCR0 = t; TACCR0 = t;
TACTL |= MC1;
} }