/*******************************************************************************
* Function Name: WCO_LowPowerStart
********************************************************************************
* Summary:
* Start WCO in low power mode by configuring the system in DeepSleep mode during
* WCO startup time(500ms)
*
* Parameters:
* None
*
* Return:
* None
*
*******************************************************************************/
void WCO_ECO_LowPowerStart(void)
{
WDT_WcoEcoLpStartSetup(); /* Setup WDT counters to enable low power WCO & ECO startup */
CySysClkWcoStart(); /* Start the WCO clock */
WDT_EnableWcoCounter(); /* Enable WDT's WCO counter (counter 0) */
#if DEBUG_ENABLE
DeepSleep_Write(1);
#endif /* End of #if DEBUG_ENABLE */
CySysPmDeepSleep(); /* Wait for the WDT counter 0 interrupt to wake up the device. On wakeup WCO is up & running */
#if DEBUG_ENABLE
DeepSleep_Write(0);
#endif /* End of #if DEBUG_ENABLE */
(void)CySysClkWcoSetPowerMode(CY_SYS_CLK_WCO_LPM); /* Switch WCO to the low power mode after startup */
CySysClkSetLfclkSource(CY_SYS_CLK_LFCLK_SRC_WCO); /* LFCLK is now driven by WCO */
CySysClkIloStop(); /* WCO is running, shut down the ILO */
(void)CySysClkEcoStart(0); /* It's time to start ECO */
WDT_EnableEcoCounter(); /* Enable WDT's ECO counter (counter 1) */
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(1);
#endif
CySysPmDeepSleep(); /* Wait for the WDT counter 1 interrupt to wake up the device. On wakeup ECO is up & running */
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(0);
#endif
WDT_DisableWcoEcoCounters();
}
/*******************************************************************************
* Function Name: System_ManagePower()
********************************************************************************
*
* Summary:
* This function puts the system in appropriate low power modes based on the
* state of BLESS and application power state.
*
* Parameters:
* none
*
********************************************************************************/
inline void System_ManagePower()
{
/* Variable declarations */
CYBLE_BLESS_STATE_T blePower;
uint8 interruptStatus ;
/* Disable global interrupts to avoid any other tasks from interrupting this section of code*/
interruptStatus = CyEnterCriticalSection();
/* Get current state of BLE sub system to check if it has successfully entered deep sleep state */
blePower = CyBle_GetBleSsState();
/* System can enter DeepSleep only when BLESS and rest of the application are in DeepSleep or equivalent
* power modes */
if((blePower == CYBLE_BLESS_STATE_DEEPSLEEP || blePower == CYBLE_BLESS_STATE_ECO_ON) &&
Application_GetPowerState() == DEEPSLEEP)
{
Application_SetPowerState(WAKEUP_DEEPSLEEP);
#if DEBUG_ENABLE
DeepSleep_Write(1);
#endif /* End of #if DEBUG_ENABLE */
CySysPmDeepSleep();
#if DEBUG_ENABLE
DeepSleep_Write(0);
#endif /* End of #if DEBUG_ENABLE */
}
else if((blePower != CYBLE_BLESS_STATE_EVENT_CLOSE))
{
if(Application_GetPowerState() == DEEPSLEEP)
{
Application_SetPowerState(WAKEUP_DEEPSLEEP);
/* change HF clock source from IMO to ECO, as IMO can be stopped to save power */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_ECO);
/* stop IMO for reducing power consumption */
CySysClkImoStop();
/* put the CPU to sleep */
#if DEBUG_ENABLE
Sleep_Write(1);
#endif /* End of #if DEBUG_ENABLE */
CySysPmSleep();
#if DEBUG_ENABLE
Sleep_Write(0);
#endif /* End of #if DEBUG_ENABLE */
/* starts execution after waking up, start IMO */
CySysClkImoStart();
/* change HF clock source back to IMO */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_IMO);
}
else if(Application_GetPowerState() == SLEEP )
{
/* If the application is using IMO for its operation, we shouldn't switch over the HFCLK source */
Application_SetPowerState(WAKEUP_SLEEP);
#if DEBUG_ENABLE
Sleep_Write(1);
#endif /* End of #if DEBUG_ENABLE */
CySysPmSleep();
#if DEBUG_ENABLE
Sleep_Write(0);
#endif /* End of #if DEBUG_ENABLE */
}
}
/* Enable interrupts */
CyExitCriticalSection(interruptStatus );
}
/*******************************************************************************
* Function Name: main
********************************************************************************
* Summary:
* MyBeacon entry point. This calls the BLE and other peripheral Component
* APIs for achieving the desired system behaviour
*
* Parameters:
* void
*
* Return:
* int
*
*******************************************************************************/
int main()
{
CyGlobalIntEnable;
/* Set the divider for ECO, ECO will be used as source when IMO is switched off to save power, to drive the HFCLK */
CySysClkWriteEcoDiv(CY_SYS_CLK_ECO_DIV8);
/* If USE_WCO_FOR_TIMING is set, then do the following:
* 1. Shut down the ECO (to reduce power consumption while WCO is starting)
* 2. Enable WDT to wakeup the system after 500ms (WCO startup time).
* 3. Configure PSoC 4 BLE device in DeepSleep mode for the 500ms WCO startup time
* 4. After WCO is enabled, restart the ECO so that BLESS interface can function */
#if USE_WCO_FOR_TIMING
CySysClkEcoStop();
WDT_Interrupt_StartEx(WDT_Handler);
CySysClkWcoStart();
CySysWdtUnlock(); /* Unlock the WDT registers for modification */
CySysWdtWriteMode(SOURCE_COUNTER, CY_SYS_WDT_MODE_INT);
CySysWdtWriteClearOnMatch(SOURCE_COUNTER, COUNTER_ENABLE);
CySysWdtWriteMatch(SOURCE_COUNTER, COUNT_PERIOD);
CySysWdtEnable(CY_SYS_WDT_COUNTER0_MASK);
CySysWdtLock();
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(1);
#endif
CySysPmDeepSleep(); /* Wait for the WDT interrupt to wake up the device */
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(0);
#endif
(void)CySysClkEcoStart(2000u);
CyDelayUs(500u);
(void)CySysClkWcoSetPowerMode(CY_SYS_CLK_WCO_LPM); /* Switch to the low power mode */
CySysClkSetLfclkSource(CY_SYS_CLK_LFCLK_SRC_WCO);
CySysWdtUnlock();
CySysWdtDisable(CY_SYS_WDT_COUNTER0_MASK);
CySysWdtLock();
#endif
CyBle_Start(BLE_AppEventHandler);
for(;;)
{
CYBLE_LP_MODE_T pwrState;
CYBLE_BLESS_STATE_T blessState;
uint8 intStatus = 0;
CyBle_ProcessEvents(); /* BLE stack processing state machine interface */
pwrState = CyBle_EnterLPM(CYBLE_BLESS_DEEPSLEEP); /* Configure BLESS in Deep-Sleep mode */
intStatus = CyEnterCriticalSection(); /* No interrupts allowed while entering system low power modes */
blessState = CyBle_GetBleSsState();
if(pwrState == CYBLE_BLESS_DEEPSLEEP) /* Make sure BLESS is in Deep-Sleep before configuring system in Deep-Sleep */
{
if(blessState == CYBLE_BLESS_STATE_ECO_ON || blessState == CYBLE_BLESS_STATE_DEEPSLEEP)
{
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(1);
#endif
CySysPmDeepSleep(); /* System Deep-Sleep. 1.3uA mode */
#if TIMING_DEBUG_ENABLE
DeepSleep_Write(0);
#endif
}
}
else if (blessState != CYBLE_BLESS_STATE_EVENT_CLOSE)
{
/* Change HF clock source from IMO to ECO, as IMO can be stopped to save power */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_ECO);
/* Stop IMO for reducing power consumption */
CySysClkImoStop();
#if TIMING_DEBUG_ENABLE
Sleep_Write(1);
#endif
/* Put the CPU to Sleep. 1.1mA mode */
CySysPmSleep();
#if TIMING_DEBUG_ENABLE
Sleep_Write(0);
#endif
/* Starts execution after waking up, start IMO */
CySysClkImoStart();
/* Change HF clock source back to IMO */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_IMO);
}
CyExitCriticalSection(intStatus);
}
}
