cc2x3x clock driver cleanup
* Bit-Addressable SFRs are now accessed as such, instead of (N)OR-ing the byte * A routine was declared as CCIF but not defined as such. Fixed * Deleted a leftover duplicate define * Formatting * Comment updates and clarifications
This commit is contained in:
George Oikonomou
parent
1fd7dcd2ef
commit
ffa3a1c4c3
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@ -27,28 +27,21 @@
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: clock.c,v 1.1 2009/09/08 20:07:35 zdshelby Exp $
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*/
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/**
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* \file
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* Implementation of the clock functions for the 8051 CPU
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* Implementation of the clock functions for the cc243x
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* \author
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* Zach Shelby (zach@sensinode.com)
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* Zach Shelby (zach@sensinode.com) - original
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* George Oikonomou - <oikonomou@users.sourceforge.net>
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*/
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/**
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* TODO: Implement clock_fine() and clock_fine_max_ticks() using another timer?
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*/
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#include <stdio.h> /*for debug printf*/
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#include "sys/clock.h"
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#include "sys/etimer.h"
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#include "cc2430_sfr.h"
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#include "sys/energest.h"
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/*Sleep timer runs on the 32k RC osc. */
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/* Sleep timer runs on the 32k RC osc. */
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/* One clock tick is 7.8 ms */
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#define TICK_VAL (32768/128) /* 256 */
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@ -63,8 +56,7 @@ volatile __data clock_time_t count = 0;
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volatile __bit sleep_flag;
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#endif
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/*calculates seconds*/
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static volatile __data clock_time_t seconds = 0;
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static volatile __data clock_time_t seconds = 0; /* Uptime in secs */
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/*---------------------------------------------------------------------------*/
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/**
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* One delay is about 0.6 us, so this function delays for len * 0.6 us
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@ -92,7 +84,7 @@ clock_wait(int i)
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while(clock_time() - start < (clock_time_t)i);
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}
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/*---------------------------------------------------------------------------*/
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clock_time_t
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CCIF clock_time_t
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clock_time(void)
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{
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return count;
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@ -107,24 +99,24 @@ clock_seconds(void)
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void
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clock_init(void)
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{
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CLKCON = OSC32K | TICKSPD2|TICKSPD1; /*tickspeed 500 kHz for timers[1-4]*/
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/*Initialize tick value*/
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timer_value = ST0; /*sleep timer 0. low bits [7:0]*/
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timer_value += ((unsigned long int)ST1) << 8; /*middle bits [15:8]*/
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timer_value += ((unsigned long int)ST2) << 16; /*high bits [23:16]*/
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timer_value += TICK_VAL; /*init value 256*/
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CLKCON = OSC32K | TICKSPD2 | TICKSPD1; /* tickspeed 500 kHz for timers[1-4] */
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/* Initialize tick value */
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timer_value = ST0; /* ST low bits [7:0] */
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timer_value += ((unsigned long int) ST1) << 8; /* middle bits [15:8] */
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timer_value += ((unsigned long int) ST2) << 16; /* high bits [23:16] */
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timer_value += TICK_VAL; /* Init value 256 */
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ST2 = (unsigned char) (timer_value >> 16);
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ST1 = (unsigned char) (timer_value >> 8);
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ST0 = (unsigned char) timer_value;
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IEN0 |= STIE; /*interrupt enable for sleep timers. STIE=Interrupt mask, CPU. */
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IEN0_STIE = 1; /* IEN0.STIE acknowledge Sleep Timer Interrupt */
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_ISR( void ) __interrupt (ST_VECTOR)
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clock_ISR(void) __interrupt(ST_VECTOR)
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{
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IEN0_EA = 0; /*interrupt disable*/
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DISABLE_INTERRUPTS();
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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/*
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@ -134,14 +126,13 @@ clock_ISR( void ) __interrupt (ST_VECTOR)
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*/
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SLEEP &= 0xFC;
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/* When using the cooperative scheduler the timer 2 ISR is only
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required to increment the RTOS tick count. */
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/*Read value of the ST0,ST1,ST2 and then add TICK_VAL and write it back.
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Next interrupt occurs after the current time + TICK_VAL*/
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/*
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* Read value of the ST0:ST1:ST2, add TICK_VAL and write it back.
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* Next interrupt occurs after the current time + TICK_VAL
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*/
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timer_value = ST0;
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timer_value += ((unsigned long int)ST1) << 8;
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timer_value += ((unsigned long int)ST2) << 16;
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timer_value += ((unsigned long int) ST1) << 8;
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timer_value += ((unsigned long int) ST2) << 16;
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timer_value += TICK_VAL;
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ST2 = (unsigned char) (timer_value >> 16);
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ST1 = (unsigned char) (timer_value >> 8);
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@ -162,16 +153,16 @@ clock_ISR( void ) __interrupt (ST_VECTOR)
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}
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#if CLOCK_CONF_ACCURATE
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if(etimer_pending() &&
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(etimer_next_expiration_time() - count - 1) > MAX_TICKS) { /*core/sys/etimer.c*/
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if(etimer_pending()
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&& (etimer_next_expiration_time() - count - 1) > MAX_TICKS) {
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etimer_request_poll();
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}
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#else
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sleep_flag = 1;
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#endif
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IRCON &= ~STIF; /*IRCON.STIF=Sleep timer interrupt flag. This flag called this interrupt func, now reset it*/
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IRCON_STIF = 0;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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IEN0_EA = 1; /*interrupt enable*/
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ENABLE_INTERRUPTS();
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}
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/*---------------------------------------------------------------------------*/
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@ -27,15 +27,14 @@
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: clock.c,v 1.1 2009/09/08 20:07:35 zdshelby Exp $
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*/
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/**
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* \file
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* Implementation of the clock functions for the 8051 CPU
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* Implementation of the clock functions for the cc253x.
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* Ported over from the cc243x original.
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* \author
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* Zach Shelby (zach@sensinode.com) - original
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* Zach Shelby (zach@sensinode.com) - original (cc243x)
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* George Oikonomou - <oikonomou@users.sourceforge.net> - cc2530 port
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*/
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#include "sfr-bits.h"
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@ -47,8 +46,6 @@
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/* Sleep timer runs on the 32k RC osc. */
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/* One clock tick is 7.8 ms */
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#define TICK_VAL (32768/128) /* 256 */
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#define MAX_TICKS (~((clock_time_t)0) / 2)
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/*---------------------------------------------------------------------------*/
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/* Do NOT remove the absolute address and do NOT remove the initialiser here */
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__xdata __at(0x0000) static unsigned long timer_value = 0;
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@ -117,7 +114,7 @@ clock_init(void)
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CLKCONCMD |= CLKCONCMD_TICKSPD2 | CLKCONCMD_TICKSPD1;
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while(CLKCONSTA != CLKCONCMD);
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/*Initialize tick value*/
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/* Initialize tick value */
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timer_value = ST0;
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timer_value += ((unsigned long int) ST1) << 8;
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timer_value += ((unsigned long int) ST2) << 16;
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@ -126,7 +123,7 @@ clock_init(void)
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ST1 = (unsigned char) (timer_value >> 8);
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ST0 = (unsigned char) timer_value;
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STIE = 1; /* IEN0.STIE interrupt enable */
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STIE = 1; /* IEN0.STIE interrupt enable */
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}
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/*---------------------------------------------------------------------------*/
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void
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@ -135,15 +132,6 @@ clock_isr(void) __interrupt(ST_VECTOR)
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DISABLE_INTERRUPTS();
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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/*
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* If the Sleep timer throws an interrupt while we are powering down to
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* PM1, we need to abort the power down. Clear SLEEP.MODE, this will signal
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* main() to abort the PM1 transition
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*
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* On cc2430 this would be:
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* SLEEPCMD &= 0xFC;
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*/
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/*
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* Read value of the ST0:ST1:ST2, add TICK_VAL and write it back.
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* Next interrupt occurs after the current time + TICK_VAL
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