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81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
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* Copyright (C) 2008-2009, Freie Universitaet Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup msba2
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* @{
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*/
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/**
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* @file
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* @brief MSB-A2 board initialization
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics, FeuerWhere project
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* @author Heiko Will
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* @author Kaspar Schleiser
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* @author Michael Baar <baar@inf.fu-berlin.de>
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* @author Zakaria Kasmi <zkasmi@inf.fu-berlin.de>
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* @note $Id$
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*/
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#include <string.h>
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#include "board.h"
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#include "msba2_common.h"
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#include "lpc23xx.h"
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#include "cpu.h"
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#include "config.h"
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#define PCRTC BIT9
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#define CL_CPU_DIV 4
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#define WD_INTERVAL 10 ///< number of seconds before WD triggers
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/*---------------------------------------------------------------------------*/
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/**
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* @brief Enabling MAM and setting number of clocks used for Flash memory fetch
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* @internal
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*/
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static void
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init_mam(void)
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{
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MAMCR = 0x0000;
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MAMTIM = 0x0003;
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MAMCR = 0x0002;
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}
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/*---------------------------------------------------------------------------*/
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void init_clks2(void)
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{
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// Wait for the PLL to lock to set frequency
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while (!(PLLSTAT & BIT26));
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// Connect the PLL as the clock source
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PLLCON = 0x0003;
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pllfeed();
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/* Check connect bit status */
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while (!(PLLSTAT & BIT25));
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}
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void watchdog_init(void)
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{
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WDCLKSEL = 0; // clock source: RC oscillator
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WDMOD &= ~WDTOF; // clear time-out flag
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WDTC = (F_RC_OSCILLATOR / 4) * WD_INTERVAL;
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}
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void bl_init_clks(void)
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{
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watchdog_init();
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PCONP = PCRTC; // switch off everything except RTC
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init_clks1();
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init_clks2();
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init_mam();
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}
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/*---------------------------------------------------------------------------*/
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