/*****************************************************************************
* Function Name: _Watchdog_Init()
******************************************************************************
* Summary:
* Initialize the watchdog.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Note:
*
*****************************************************************************/
void _Watchdog_Init(void)
{
// Unlock the WDT registers for modification.
CySysWdtUnlock();
// Write Mode for Counters as Interrupt on Match.
CySysWdtWriteMode(CY_SYS_WDT_COUNTER0, CY_SYS_WDT_MODE_INT);
CySysWdtWriteMode(CY_SYS_WDT_COUNTER1, CY_SYS_WDT_MODE_INT);
// Set Clear on Match for Counters.
CySysWdtWriteClearOnMatch(CY_SYS_WDT_COUNTER0, TRUE);
CySysWdtWriteClearOnMatch(CY_SYS_WDT_COUNTER1, TRUE);
// Set Watchdog interrupt to lower priority.
CyIntSetPriority(WATCHDOG_INT_VEC_NUM, WATCHDOG_INT_VEC_PRIORITY);
// Enable Watchdog Interrupt using Interrupt number.
CyIntEnable(WATCHDOG_INT_VEC_NUM);
// Write the match value in Counters.
CySysWdtWriteMatch(CY_SYS_WDT_COUNTER0, WATCHDOG_COUNTER0_PERIOD);
CySysWdtWriteMatch(CY_SYS_WDT_COUNTER1, WATCHDOG_COUNTER1_PERIOD);
// Enable Counters.
CySysWdtEnable(CY_SYS_WDT_COUNTER0_MASK);
CySysWdtEnable(CY_SYS_WDT_COUNTER1_MASK);
// Lock Watchdog to prevent further changes.
CySysWdtLock();
// Set the Watchdog Interrupt vector to the address of Interrupt routine
// _Watchdog_Handler.
CyIntSetVector(WATCHDOG_INT_VEC_NUM, &_Watchdog_Handler);
}
/*******************************************************************************
* Function Name: WDT_Stop
********************************************************************************
*
* Summary:
* This API stops the WDT timer.
*
*******************************************************************************/
void WDT_Stop(void)
{
/* Unlock the WDT registers for modification */
CySysWdtUnlock();
/* Disable the specified WDT counter */
CySysWdtDisable(WDT_COUNTER_MASK);
/* Locks out configuration changes to the Watchdog timer registers */
CySysWdtLock();
}
void WDT_Start(void)
{
/* Unlock the WDT registers for modification */
CySysWdtUnlock();
/* Setup ISR */
WDT_Interrupt_StartEx(&Timer_Interrupt);
/* Write the mode to generate interrupt on match */
CySysWdtWriteMode(WDT_COUNTER, CY_SYS_WDT_MODE_INT);
/* Configure the WDT counter clear on a match setting */
CySysWdtWriteClearOnMatch(WDT_COUNTER, WDT_COUNTER_ENABLE);
/* Configure the WDT counter match comparison value */
CySysWdtWriteMatch(WDT_COUNTER, WDT_1SEC);
/* Reset WDT counter */
CySysWdtResetCounters(WDT_COUNTER);
/* Enable the specified WDT counter */
CySysWdtEnable(WDT_COUNTER_MASK);
/* Lock out configuration changes to the Watchdog timer registers */
CySysWdtLock();
}
/*******************************************************************************
* 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);
}
}
/*****************************************************************************
* Function Name: _Watchdog_Handler()
******************************************************************************
* Summary:
* Watchdog interrupt routine.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Note:
*
*****************************************************************************/
void _Watchdog_Handler(void)
{
// If the Interrupt source is Counter 0 match, then process.
if(CySysWdtGetInterruptSource() & CY_SYS_WDT_COUNTER0_INT)
{
// Clear Watchdog Interrupt from Counter 0.
CySysWdtClearInterrupt(CY_SYS_WDT_COUNTER0_INT);
/********************************************************************/
/********************************************************************/
// Unlock the WDT registers for modification.
CySysWdtUnlock();
// Disable Counter 0 to allow modifications.
CySysWdtDisable(CY_SYS_WDT_COUNTER0_MASK);
// Reset Counter 0 and give ~3 LFCLK cycles to take effect.
CySysWdtResetCounters(CY_SYS_WDT_COUNTER0_RESET);
CyDelayUs(WATCHDOG_REG_UPDATE_WAIT_TIME);
// Write the Counter 0 match value for 20 millisecond and give
// ~3 LFCLK cycles to take effect.
CySysWdtWriteMatch(CY_SYS_WDT_COUNTER0, WATCHDOG_COUNTER0_PERIOD);
CyDelayUs(WATCHDOG_REG_UPDATE_WAIT_TIME);
// Enable Watchdog Counter 0.
CySysWdtEnable(CY_SYS_WDT_COUNTER0_MASK);
// Lock Watchdog to prevent any further change.
CySysWdtLock();
}
// If the Interrupt source is Counter 1 match, then process.
else if(CySysWdtGetInterruptSource() & CY_SYS_WDT_COUNTER1_INT)
{
// Clear Watchdog Interrupt from Counter 0.
CySysWdtClearInterrupt(CY_SYS_WDT_COUNTER1_INT);
/********************************************************************/
// Stores the previous state of the BLE module.
static uint8 previousState = 0xFF;
// If in advertising mode, flash the LED.
if(CyBle_GetState() == CYBLE_STATE_ADVERTISING) {
previousState = CYBLE_STATE_ADVERTISING;
if(_LED_Green_On)
_LED_TurnOffLED(TRUE);
else
_LED_TurnOnLED(TRUE);
}
// If state changed, turn all the LEDs off.
if (CyBle_GetState() != previousState)
_LED_TurnOffLED(TRUE);
// If disconnected, turn all the LEDs off.
else if(CyBle_GetState() == CYBLE_STATE_DISCONNECTED) {
previousState = CYBLE_STATE_DISCONNECTED;
_LED_TurnOffLED(TRUE);
}
// If connected, turn the LED on.
else if(CyBle_GetState() == CYBLE_STATE_CONNECTED) {
previousState = CYBLE_STATE_CONNECTED;
_LED_TurnOffLED(FALSE);
_LED_TurnOnLED(TRUE);
}
/********************************************************************/
// Unlock the WDT registers for modification.
CySysWdtUnlock();
// Disable Counter 1 to allow modifications.
CySysWdtDisable(CY_SYS_WDT_COUNTER1_MASK);
// Reset Counter 1 and give ~3 LFCLK cycles to take effect.
CySysWdtResetCounters(CY_SYS_WDT_COUNTER1_RESET);
CyDelayUs(WATCHDOG_REG_UPDATE_WAIT_TIME);
// Write the Counter 1 match value for 500 millisecond and give
// ~3 LFCLK cycles to take effect.
CySysWdtWriteMatch(CY_SYS_WDT_COUNTER1, WATCHDOG_COUNTER1_PERIOD);
CyDelayUs(WATCHDOG_REG_UPDATE_WAIT_TIME);
// Enable Watchdog Counter 1.
CySysWdtEnable(CY_SYS_WDT_COUNTER1_MASK);
// Lock Watchdog to prevent any further change.
CySysWdtLock();
}
}
