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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 }