79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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/***************************************************************
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*
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* OpenBeacon.org - Power Management
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*
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* Copyright 2010 Milosch Meriac <meriac@openbeacon.de>
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*
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***************************************************************
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <openbeacon.h>
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#include "pin.h"
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#include "pmu.h"
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/* Watchdog oscillator control register setup */
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#define FREQSEL 1
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#define FCLKANA 500000.0
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#define DIVSEL 0x1F
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#define WDT_OSC_CLK (FCLKANA/(2.0*(1+DIVSEL)))
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#define MAINCLKSEL_IRC_OSC 0
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#define MAINCLKSEL_SYS_PLL 1
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#define MAINCLKSEL_WDT_OSC 2
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#define MAINCLKSEL_SYS_PLL_OUT 3
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static const uint32_t pmu_reason_signature = 0xDEADBEEF;
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void
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deep_sleep_ms (uint32_t milliseconds)
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{
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(void) milliseconds;
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/* back up current power states */
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LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
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__asm volatile ("WFI");
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}
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void
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pmu_sleep (void)
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{
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}
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void
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pmu_off (uint32_t reason)
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{
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LPC_PMU->GPREG0 = pmu_reason_signature;
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LPC_PMU->GPREG1 = reason;
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LPC_SYSCON->PDSLEEPCFG = 0xFFFFFFFF;
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SCB->SCR |= NVIC_LP_SLEEPDEEP;
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LPC_PMU->PCON = 0x2;
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pin_mode_pmu (1);
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__WFI ();
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}
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uint32_t
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pmu_reason (void)
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{
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return (LPC_PMU->GPREG0==pmu_reason_signature)?LPC_PMU->GPREG1:0;
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}
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void
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pmu_init (void)
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{
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pin_mode_pmu (0);
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}
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