void InitDeepSleep(uint32_t ms)
{
LPC_SYSCON->PDRUNCFG = BF_PDRUNCFG_RUN; // Initialize power to chip modules
LPC_SYSCON->SYSAHBCLKCTRL = BF_SYSAHBCLKCTRL_RUN; // Initialize clocks
// Make sure clock is set to 12 MHz and setup System Tick Timer (1 Tick = 1ms)
Target_SetClock_IRC();
LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG; // Configure PDAWAKECFG to restore PDRUNCFG on wake up
LPC_SYSCON->PDSLEEPCFG = BF_PDSLEEPCFG_WDT; // Configure deep sleep with WDT oscillator
LPC_TMR32B0->TCR = BF_TIMER_TCR_RESET; // reset timer
// The following lines initializing PR and MR0
LPC_TMR32B0->PR = 0;
LPC_TMR32B0->MR2 = (ms*MeasureWDO()/WDOMEASUREDURATION_MS);
LPC_TMR32B0->MCR = BF_TIMER_MCR_MATCHSTOP2 | BF_TIMER_MCR_MATCHRESET2;
LPC_IOCON->PIO0_1 = (LPC_IOCON->PIO0_1 & ~0x3F) | 0x2; // Set IOCON register on P0.1 to match function
/* Configure Wakeup I/O */
/* Specify the start logic to allow the chip to be waken up using PIO0_1 */
LPC_SYSCON->STARTAPRP0 |= BF_STARTLOGIC_P0_1; // Rising edge
LPC_SYSCON->STARTRSRP0CLR = BF_STARTLOGIC_P0_1; // Clear pending bit
LPC_SYSCON->STARTERP0 |= BF_STARTLOGIC_P0_1; // Enable Start Logic
NVIC_EnableIRQ(WAKEUP1_IRQn);
lastTimeSetup = ms; // Save time in local variable for EnterDeepSleep()
}
void InitDeepSleep(void)
{
#ifdef ENABLE_CLKOUT
/* Output the Clk onto the CLKOUT Pin PIO0_1 to monitor the freq on a scope */
LPC_IOCON->PIO0_1 = 0xC1;
/* Select the MAIN clock as the clock out selection since it's driving the core */
LPC_SYSCON->CLKOUTCLKSEL = 3;
LPC_SYSCON->CLKOUTDIV = 10;
LPC_SYSCON->CLKOUTUEN = 0;
LPC_SYSCON->CLKOUTUEN = 1;
#endif /* ENABLE_CLKOUT */
// Set up Systick timer for 1 mS timeouts
// Used for general timing when awake and to calibrate the WDT
SysTick->LOAD = (MainClockFrequency / 1000)-1;
SysTick->VAL = 0; // reload counter
SysTick->CTRL = 7; // enable counter, interrupts, select processor clock
LPC_SYSCON->PDAWAKECFG = // Configure PDAWAKECFG to restore PDRUNCFG on wake up
LPC_SYSCON->PDRUNCFG;
LPC_SYSCON->PDSLEEPCFG = BF_PDSLEEPCFG_WDT; // Configure deep sleep with WDT oscillator
LPC_TMR16B0->TCR = BF_TIMER_TCR_RESET; // reset timer
// The following lines initializing PR and MR0 are at risk for overflow
// if the timing and frequency parameters are changed because they are
// using a 16-bit timer.
#ifndef DEBUG
LPC_TMR16B0->PR = 0;
LPC_TMR16B0->MR0 = (SLEEPDURATION_MS*MeasureWDO()/WDOMEASUREDURATION_MS - WUTIME_CLOCKS - 1);
#else
LPC_TMR16B0->PR = (MainClockFrequency / WDTClockFrequency) -1;
LPC_TMR16B0->MR0 = SLEEPDURATION_MS*WDTClockFrequency/1000;
#endif
LPC_TMR16B0->MCR = BF_TIMER_MCR_MATCHSTOP0 | BF_TIMER_MCR_MATCHRESET0;
LPC_IOCON->PIO0_8 = (LPC_IOCON->PIO0_8 & ~0x3F) | 0x2; // Set IOCON register on P0.8 to match function
/* Configure Wakeup I/O */
/* Specify the start logic to allow the chip to be waken up using PIO0_8 */
LPC_SYSCON->STARTAPRP0 |= BF_STARTLOGIC_P0_8; // Rising edge
LPC_SYSCON->STARTRSRP0CLR = BF_STARTLOGIC_P0_8; // Clear pending bit
LPC_SYSCON->STARTERP0 |= BF_STARTLOGIC_P0_8; // Enable Start Logic
NVIC_EnableIRQ(WAKEUP8_IRQn);
}