/*
* ======== Power_LF_clockFunc ========
*/
Void Power_LF_clockFunc(UArg arg)
{
UInt32 sourceLF;
/* query LF clock source */
sourceLF = OSCClockSourceGet(OSC_SRC_CLK_LF);
/* is LF source either RCOSC_LF or XOSC_LF yet? */
if ((sourceLF == OSC_RCOSC_LF) || (sourceLF == OSC_XOSC_LF)) {
/* yes, disable the LF clock qualifiers */
DDI16BitfieldWrite(
AUX_DDI0_OSC_BASE,
DDI_0_OSC_O_CTL0,
DDI_0_OSC_CTL0_BYPASS_XOSC_LF_CLK_QUAL_M|
DDI_0_OSC_CTL0_BYPASS_RCOSC_LF_CLK_QUAL_M,
DDI_0_OSC_CTL0_BYPASS_RCOSC_LF_CLK_QUAL_S,
0x3
);
/* now finish by releasing the standby disallow constraint */
Power_releaseConstraint(Power_SB_DISALLOW);
}
/* not yet, LF still derived from HF, restart clock to check back later */
else {
/* retrigger LF Clock to fire in 100 msec */
Clock_setTimeout(
ti_sysbios_family_arm_cc26xx_Power_Module_State_lfClockObj(),
(100000 / Clock_tickPeriod));
Clock_start(
ti_sysbios_family_arm_cc26xx_Power_Module_State_lfClockObj());
}
}
/*
* ======== SENSORTAG_CC2650_initGeneral ========
*/
Void SENSORTAG_CC2650_initGeneral(Void)
{
/* force power on AUX - this will be released when entering sleep mode */
AONWUCAuxWakeupEvent(AONWUC_AUX_WAKEUP);
/* enable the AUX oscillator clock */
AUXWUCClockEnable(AUX_WUC_OSCCTRL_CLOCK);
while(AUXWUCClockStatus(AUX_WUC_OSCCTRL_CLOCK) != AUX_WUC_CLOCK_READY)
{ }
/* This application will not be using the AUX domain out of boot
* and we will leave out clock for optimal power conservation */
AONWUCAuxPowerDownConfig(AONWUC_NO_CLOCK);
/*
* Source the LF clock from the low frequency XTAL_OSC.
* HF and MF are sourced from the high frequency RC_OSC.
*/
OSCClockSourceSet(OSC_SRC_CLK_LF, OSC_XOSC_LF);
OSCClockSourceSet(OSC_SRC_CLK_MF | OSC_SRC_CLK_HF, OSC_RCOSC_HF);
/*
* Check if already sourcing the HF clock from RC_OSC.
* If a switch of the clock source is not required, then the call to ROM
* will loop forever.
*/
if(OSCClockSourceGet(OSC_SRC_CLK_HF) != OSC_RCOSC_HF)
{
OSCHfSourceSwitch();
}
/* enable DCDC */
PowerCtrlSourceSet(PWRCTRL_PWRSRC_DCDC);
/* make sure AON accesses are in sync and enable powerdown on AUX */
SysCtrlAonSync();
AUXWUCPowerCtrl(AUX_WUC_POWER_DOWN);
}
/*
* ======== Power_sleep ========
*/
Power_Status Power_sleep(Power_SleepState sleepState, UArg arg0, UArg arg1)
{
Power_Status status = Power_SOK;
UInt xosc_hf_active = FALSE;
Power_Event postEventLate;
UInt32 poweredDomains = 0;
Bool exitNow = FALSE;
Power_Event preEvent;
Power_Event postEvent;
UInt32 constraints;
Bool retainCache = FALSE;
UInt32 modeVIMS;
UInt taskKey;
UInt swiKey;
UInt hwiKey;
/* first validate the sleep code */
if ( sleepState != Power_STANDBY) {
status = Power_EFAIL;
}
if (status == Power_SOK) {
/* make sure Power is not still busy with a previous transition */
hwiKey = Hwi_disable();
if (Power_module->state == Power_ACTIVE) {
/* set transition state to entering sleep */
Power_module->state = Power_ENTERING_SLEEP;
}
else {
exitNow = TRUE;
}
Hwi_restore(hwiKey);
if (exitNow == TRUE) {
status = Power_EBUSY;
}
else {
/* setup sleep vars */
if (sleepState == Power_STANDBY) {
preEvent = Power_ENTERING_STANDBY;
postEvent = Power_AWAKE_STANDBY;
postEventLate = Power_AWAKE_STANDBY_LATE;
}
/* disable Task scheduling; allow Swis and Hwis for notifications */
taskKey = Task_disable();
/* signal all clients registered for pre-sleep notification */
status = Power_notify(preEvent);
/* check for any error */
if (status != Power_SOK) {
Power_module->state = Power_ACTIVE;
Task_restore(taskKey); /* re-enable scheduler */
return (status);
}
/* now disable Swi scheduling */
swiKey = Swi_disable();
/* freeze the IOs on the boundary between MCU and AON */
AONIOCFreezeEnable();
/* if XOSC_HF is active, force it off */
if(OSCClockSourceGet(OSC_SRC_CLK_HF) == OSC_XOSC_HF) {
xosc_hf_active = TRUE;
ti_sysbios_family_arm_cc26xx_Power_XOSC_HF(DISABLE);
}
/* allow AUX to power down */
AONWUCAuxWakeupEvent(AONWUC_AUX_ALLOW_SLEEP);
/* make sure writes take effect */
SysCtrlAonSync();
/* invoke specific sequences to activate sleep states... */
if (sleepState == Power_STANDBY) {
/* query and save domain states before powering them off */
if (Power_getDependencyCount(DOMAIN_RFCORE)) {
poweredDomains |= PRCM_DOMAIN_RFCORE;
}
if (Power_getDependencyCount(DOMAIN_SERIAL)){
poweredDomains |= PRCM_DOMAIN_SERIAL;
}
if (Power_getDependencyCount(DOMAIN_PERIPH)) {
poweredDomains |= PRCM_DOMAIN_PERIPH;
}
/* gate running deep sleep clocks for Crypto and DMA */
if (Power_getDependencyCount(PERIPH_CRYPTO)) {
PRCMPeripheralDeepSleepDisable(
ti_sysbios_family_arm_cc26xx_Power_db[
PERIPH_CRYPTO].driverlibID);
}
if (Power_getDependencyCount(PERIPH_UDMA)) {
PRCMPeripheralDeepSleepDisable(
ti_sysbios_family_arm_cc26xx_Power_db[
PERIPH_UDMA].driverlibID);
}
/* make sure clock settings take effect */
PRCMLoadSet();
/* request power off of domains in the MCU voltage domain */
PRCMPowerDomainOff(poweredDomains | PRCM_DOMAIN_CPU);
/* request uLDO during standby */
PRCMMcuUldoConfigure(true);
/* query constraints to determine if cache should be retained */
constraints = Power_getConstraintInfo();
if ((constraints & Power_SB_VIMS_CACHE_RETAIN) != 0) {
retainCache = TRUE;
}
/* if don't want retention in standby, disable it now ... */
if (retainCache == FALSE) {
modeVIMS = VIMSModeGet(VIMS_BASE);
/* wait if invalidate in progress... */
while (modeVIMS == VIMS_MODE_CHANGING) {
modeVIMS = VIMSModeGet(VIMS_BASE);
}
PRCMCacheRetentionDisable();
VIMSModeSet(VIMS_BASE, VIMS_MODE_OFF);
}
/* setup recharge parameters */
SysCtrlSetRechargeBeforePowerDown(XoscInHighPowerMode);
/* make sure all writes have taken effect */
SysCtrlAonSync();
/* invoke deep sleep to go to STANDBY */
PRCMDeepSleep();
/* if didn't retain cache in standby, re-enable retention now */
if (retainCache == FALSE) {
VIMSModeSet(VIMS_BASE, modeVIMS);
PRCMCacheRetentionEnable();
}
/* force power on of AUX to keep it on when system is not
* sleeping; this also counts as a write to the AON interface
* ensuring that a following sync of the AON interface will
* force an update of all registers
*/
AONWUCAuxWakeupEvent(AONWUC_AUX_WAKEUP);
while(!(AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON)) {};
/* if XOSC_HF was forced off above, initiate switch back */
if (xosc_hf_active == TRUE) {
ti_sysbios_family_arm_cc26xx_Power_XOSC_HF(ENABLE);
}
/* restore power domain states in effect before standby */
PRCMPowerDomainOn(poweredDomains);
while (PRCMPowerDomainStatus(poweredDomains) !=
PRCM_DOMAIN_POWER_ON){};
/* restore deep sleep clocks of Crypto and DMA */
if (Power_getDependencyCount(PERIPH_CRYPTO)) {
PRCMPeripheralDeepSleepEnable(
ti_sysbios_family_arm_cc26xx_Power_db[
PERIPH_CRYPTO].driverlibID);
}
if (Power_getDependencyCount(PERIPH_UDMA)) {
PRCMPeripheralDeepSleepEnable(
ti_sysbios_family_arm_cc26xx_Power_db[
PERIPH_UDMA].driverlibID);
}
/* make sure clock settings take effect */
PRCMLoadSet();
}
/* release request for uLDO */
PRCMMcuUldoConfigure(false);
/* set transition state to EXITING_SLEEP */
Power_module->state = Power_EXITING_SLEEP;
/*
* signal clients registered for early post-sleep notification;
* this should be used to initialize any timing critical or IO
* dependent hardware
*/
status = Power_notify(postEvent);
/* disable IO freeze and ensure RTC shadow value is updated */
AONIOCFreezeDisable();
SysCtrlAonSync();
/* re-enable interrupts */
CPUcpsie();
/* signal all clients registered for late post-sleep notification */
status = Power_notify(postEventLate);
/* now clear the transition state before re-enabling scheduler */
Power_module->state = Power_ACTIVE;
/* re-enable Swi scheduling */
Swi_restore(swiKey);
/* adjust recharge parameters */
SysCtrlAdjustRechargeAfterPowerDown();
/* re-enable Task scheduling */
Task_restore(taskKey);
/* check for any notification error */
if (status != Power_SOK) {
return (status);
}
}
}
return (status);
}
/*
* ======== Power_shutdown ========
*/
Power_Status Power_shutdown(UArg arg)
{
Power_Status status = Power_EFAIL;
Bool exitNow = FALSE;
UInt32 constraints;
UInt hwiKey;
/* make sure shutdown request doesn't violate a constraint */
constraints = Power_getConstraintInfo();
if ((constraints & (Power_SD_DISALLOW)) != 0) {
status = Power_ECHANGE_NOT_ALLOWED;
}
if (status == Power_EFAIL) {
/* make sure Power is not still busy with a previous transition */
hwiKey = Hwi_disable();
if (Power_module->state == Power_ACTIVE) {
/* set new transition state to entering shutdown */
Power_module->state = Power_SHUTDOWN;
}
else {
exitNow = TRUE;
}
Hwi_restore(hwiKey);
if (exitNow == TRUE) {
status = Power_EBUSY;
}
else {
/* disable interrupts as start the shutdown sequence */
Hwi_disable();
/* signal all clients registered for pre-shutdown notification */
status = Power_notify(Power_ENTERING_SHUTDOWN);
/* check for any error */
if (status != Power_SOK) {
Power_module->state = Power_ACTIVE;
CPUcpsie();
return (status);
}
/* proceed with shutdown sequence ... */
/* switch to RCOSC_HF and RCOSC_LF */
OSCInterfaceEnable();
if(OSCClockSourceGet(OSC_SRC_CLK_HF) != OSC_RCOSC_HF) {
OSCClockSourceSet(OSC_SRC_CLK_HF | OSC_SRC_CLK_MF,
OSC_RCOSC_HF);
while(!OSCHfSourceReady());
OSCHfSourceSwitch();
}
OSCClockSourceSet(OSC_SRC_CLK_LF,OSC_RCOSC_LF);
while(OSCClockSourceGet(OSC_SRC_CLK_LF) != OSC_RCOSC_LF);
OSCInterfaceDisable();
/* make sure DMA and CRYTO clocks are off in deep-sleep */
PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_CRYPTO);
PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_UDMA);
PRCMLoadSet();
while(!PRCMLoadGet()){};
/* power OFF AUX and disconnect from bus */
AUXWUCPowerCtrl(AUX_WUC_POWER_OFF);
/* remove AUX force ON */
HWREG(AON_WUC_BASE + AON_WUC_O_AUXCTL) &=
~AON_WUC_AUXCTL_AUX_FORCE_ON;
/*
* reset AON event source IDs to avoid pending events powering
* on MCU/AUX
*/
HWREG(AON_EVENT_BASE + AON_EVENT_O_MCUWUSEL) = 0x3F3F3F3F;
HWREG(AON_EVENT_BASE + AON_EVENT_O_AUXWUSEL) = 0x003F3F3F;
/* sync AON */
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
/*
* enable shutdown - this latches the IOs, so configuration of
* IOCFGx registers must be done prior to this
*/
AONWUCShutDownEnable();
/* sync AON */
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
/* wait until AUX powered off */
while (AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON);
/* request to power off MCU when go to deep sleep */
PRCMMcuPowerOff();
/* turn off power domains inside MCU VD (BUS, FL_BUS, RFC, CPU) */
PRCMPowerDomainOff(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH | PRCM_DOMAIN_CPU | PRCM_DOMAIN_VIMS);
/* deep sleep to activate shutdown */
PRCMDeepSleep();
}
}
Power_module->state = Power_ACTIVE;
/* if get here failed to shutdown, return failure code */
return (Power_EFAIL);
}
