LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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pmu_8xx.c
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1 /*
2  * @brief LPC8xx PMU chip driver
3  *
4  * @note
5  * Copyright(C) NXP Semiconductors, 2012
6  * All rights reserved.
7  *
8  * @par
9  * Software that is described herein is for illustrative purposes only
10  * which provides customers with programming information regarding the
11  * LPC products. This software is supplied "AS IS" without any warranties of
12  * any kind, and NXP Semiconductors and its licensor disclaim any and
13  * all warranties, express or implied, including all implied warranties of
14  * merchantability, fitness for a particular purpose and non-infringement of
15  * intellectual property rights. NXP Semiconductors assumes no responsibility
16  * or liability for the use of the software, conveys no license or rights under any
17  * patent, copyright, mask work right, or any other intellectual property rights in
18  * or to any products. NXP Semiconductors reserves the right to make changes
19  * in the software without notification. NXP Semiconductors also makes no
20  * representation or warranty that such application will be suitable for the
21  * specified use without further testing or modification.
22  *
23  * @par
24  * Permission to use, copy, modify, and distribute this software and its
25  * documentation is hereby granted, under NXP Semiconductors' and its
26  * licensor's relevant copyrights in the software, without fee, provided that it
27  * is used in conjunction with NXP Semiconductors microcontrollers. This
28  * copyright, permission, and disclaimer notice must appear in all copies of
29  * this code.
30  */
31 
32 #include "chip.h"
33 
34 /*****************************************************************************
35  * Private types/enumerations/variables
36  ****************************************************************************/
37 
38 #define M0SCB_SLEEPONEXIT ((uint32_t) (1 << 1))
39 #define M0SCB_SLEEPDEEP ((uint32_t) (1 << 2))
40 #define M0SCB_SEVONPEND ((uint32_t) (1 << 4))
41 
42 /*****************************************************************************
43  * Public types/enumerations/variables
44  ****************************************************************************/
45 
46 /*****************************************************************************
47  * Private functions
48  ****************************************************************************/
49 
50 /*****************************************************************************
51  * Public functions
52  ****************************************************************************/
53 
54 /* Put some of the peripheral in sleep mode */
55 void Chip_PMU_Sleep(LPC_PMU_T *pPMU, CHIP_PMU_MCUPOWER_T SleepMode)
56 {
57  /* Currently powered devices will not be powered down */
58  Chip_SYSCTL_SetWakeup(Chip_SYSCTL_GetPowerStates());
59 
60  /* Disable powerdown for WDT and brown-out detector */
61  Chip_SYSCTL_SetDeepSleepPD(~(SYSCTL_DEEPSLP_BOD_PD | SYSCTL_DEEPSLP_WDTOSC_PD));
62 
63  switch ( SleepMode ) {
64  case PMU_MCU_DEEP_SLEEP:
65  SCB->SCR |= M0SCB_SLEEPDEEP;
66  pPMU->DPDCTRL |= PMU_DPDCTRL_LPOSCEN;
67  pPMU->PCON = PMU_PCON_PM_DPD;
68  break;
69 
70  case PMU_MCU_POWER_DOWN:
71  SCB->SCR |= M0SCB_SLEEPDEEP;
72  pPMU->DPDCTRL |= PMU_DPDCTRL_LPOSCEN;
73  pPMU->PCON = PMU_PCON_PM_PWD;
74  break;
75 
76  case PMU_MCU_DEEP_PWRDOWN:
77  pPMU->GPREG0 = 0x12345678;
78  pPMU->GPREG1 = 0x87654321;
79  pPMU->GPREG2 = 0x56781234;
80  pPMU->GPREG3 = 0x43218765;
81  SCB->SCR |= M0SCB_SLEEPDEEP;
82  pPMU->DPDCTRL |= PMU_DPDCTRL_LPOSCDPDEN;
83  pPMU->PCON = PMU_PCON_PM_DPWD;
84  break;
85 
86  case PMU_MCU_SLEEP:
87  pPMU->DPDCTRL |= PMU_DPDCTRL_LPOSCEN;
88 
89  default:
90  break;
91  }
92  __WFI();/* Enter to sleep mode */
93 }