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Increased the clock speed to 32768/4 from 32768/8 to provide better accuracy for power profiling of radio CCA checks

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This commit is contained in:
adamdunkels 2009-12-09 12:55:35 +00:00
parent eff2203310
commit 9ac4109bad
2 changed files with 5 additions and 7 deletions
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8
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 1.18 2009/12/08 23:40:14 adamdunkels Exp $ * @(#)$Id: clock.c,v 1.19 2009/12/09 12:55:35 adamdunkels Exp $
*/ */
@ -42,8 +42,6 @@
#include "sys/etimer.h" #include "sys/etimer.h"
#include "rtimer-arch.h" #include "rtimer-arch.h"
/* 38400 cycles @ 2.4576MHz with divisor 8 ==> 1/8 s */
/* #define INTERVAL (307200ULL / CLOCK_SECOND) */
#define INTERVAL (RTIMER_ARCH_SECOND / CLOCK_SECOND) #define INTERVAL (RTIMER_ARCH_SECOND / CLOCK_SECOND)
#define MAX_TICKS (~((clock_time_t)0) / 2) #define MAX_TICKS (~((clock_time_t)0) / 2)
@ -136,8 +134,8 @@ clock_init(void)
/* Select SMCLK (2.4576MHz), clear TAR */ /* Select SMCLK (2.4576MHz), clear TAR */
/* TACTL = TASSEL1 | TACLR | ID_3; */ /* TACTL = TASSEL1 | TACLR | ID_3; */
/* Select ACLK 32768Hz clock, divide by 8 */ /* Select ACLK 32768Hz clock, divide by 4 */
TACTL = TASSEL0 | TACLR | ID_3; TACTL = TASSEL0 | TACLR | ID_2;
/* Initialize ccr1 to create the X ms interval. */ /* Initialize ccr1 to create the X ms interval. */
/* CCR1 interrupt enabled, interrupt occurs when timer equals CCR1. */ /* CCR1 interrupt enabled, interrupt occurs when timer equals CCR1. */

4
cpu/msp430/rtimer-arch.h
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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: rtimer-arch.h,v 1.5 2008/12/02 12:44:48 joxe Exp $ * $Id: rtimer-arch.h,v 1.6 2009/12/09 12:55:35 adamdunkels Exp $
*/ */
/** /**
@ -44,7 +44,7 @@
#include <io.h> #include <io.h>
#include "sys/rtimer.h" #include "sys/rtimer.h"
#define RTIMER_ARCH_SECOND 4096 #define RTIMER_ARCH_SECOND (4096U*2)
#define rtimer_arch_now() (TAR) #define rtimer_arch_now() (TAR)