steven niu / steven_powercontrol

implement LP1768 power mode

Fork of steven_powercontrol by steven niu

powercontrol.h@1:2976b5aa967b, 2014-08-01 (annotated)

Committer:
steniu01
Date:
Fri Aug 01 17:04:39 2014 +0000
Revision:
1:2976b5aa967b
Parent:
steven_powercontrol.h@0:fc6cd61e7460 
this is the first release version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
steniu01 0:fc6cd61e7460 1 //sleep mode
steniu01 0:fc6cd61e7460 2 void steven_Sleep(void) {
steniu01 0:fc6cd61e7460 3
steniu01 0:fc6cd61e7460 4 LPC_SC->PCON=0x0;
steniu01 0:fc6cd61e7460 5 // SRC[SLEEPDEEP] set to 0 = sleep, this bit control whether the processor uses sleep or deep sleep as its low power mode
steniu01 0:fc6cd61e7460 6 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
steniu01 0:fc6cd61e7460 7
steniu01 0:fc6cd61e7460 8 // wait for interrupt
steniu01 0:fc6cd61e7460 9 __WFI();
steniu01 0:fc6cd61e7460 10 }
steniu01 0:fc6cd61e7460 11 // "Deep Sleep" mode
steniu01 0:fc6cd61e7460 12 void steven_DeepSleep(void) {
steniu01 0:fc6cd61e7460 13
steniu01 0:fc6cd61e7460 14
steniu01 0:fc6cd61e7460 15 // PCON[PD] set to DeepSleep
steniu01 0:fc6cd61e7460 16 LPC_SC->PCON = 0x0;
steniu01 0:fc6cd61e7460 17
steniu01 0:fc6cd61e7460 18 // SRC[SLEEPDEEP] set to 0 = DeepSleep
steniu01 0:fc6cd61e7460 19 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
steniu01 0:fc6cd61e7460 20
steniu01 0:fc6cd61e7460 21 // wait for interrupt
steniu01 0:fc6cd61e7460 22 __WFI();
steniu01 0:fc6cd61e7460 23 }
steniu01 0:fc6cd61e7460 24
steniu01 0:fc6cd61e7460 25 //"Power-Down" Mode
steniu01 0:fc6cd61e7460 26 void steven_PowerDown(void)
steniu01 0:fc6cd61e7460 27 {
steniu01 0:fc6cd61e7460 28 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
steniu01 0:fc6cd61e7460 29 LPC_SC->PCON=0x1; // PM1=0, PM0=1, enter power down mode if the SLEEPDEEP bit in SCR is 1
steniu01 0:fc6cd61e7460 30 __WFI();
steniu01 0:fc6cd61e7460 31 //reset back to normal
steniu01 0:fc6cd61e7460 32 LPC_SC->PCON = 0x1;
steniu01 0:fc6cd61e7460 33 }
steniu01 0:fc6cd61e7460 34
steniu01 0:fc6cd61e7460 35 //"Deep Power-Down" Mode
steniu01 0:fc6cd61e7460 36 void steven_DeepPowerDown(void)
steniu01 0:fc6cd61e7460 37 {
steniu01 0:fc6cd61e7460 38 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
steniu01 0:fc6cd61e7460 39 LPC_SC->PCON = 0x3;//// PM1=1, PM0=1, enter deep power down mode if the SLEEPDEEP bit in SCR is 1
steniu01 0:fc6cd61e7460 40 __WFI();
steniu01 0:fc6cd61e7460 41 //reset back to normal
steniu01 0:fc6cd61e7460 42 LPC_SC->PCON =0x0;
steniu01 0:fc6cd61e7460 43 }
steniu01 0:fc6cd61e7460 44
steniu01 0:fc6cd61e7460 45 // "Brown-out Reduced Power mode"
steniu01 0:fc6cd61e7460 46 void steven_BOGD_PowerDown(void)
steniu01 0:fc6cd61e7460 47 {
steniu01 0:fc6cd61e7460 48 LPC_SC->PCON=0x1d; // PM1=0, PM0=1, enter power down mode if the SLEEPDEEP bit in SCR is 1; BOGD
steniu01 0:fc6cd61e7460 49 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
steniu01 0:fc6cd61e7460 50 __WFI();
steniu01 0:fc6cd61e7460 51 }
steniu01 0:fc6cd61e7460 52