board_common_init.c
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/*
* Copyright (C) 2008-2009, Freie Universitaet Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup msba2
* @{
*/
/**
* @file
* @brief MSB-A2 board initialization
*
* @author Heiko Will
* @author Kaspar Schleiser
* @author Michael Baar <baar@inf.fu-berlin.de>
* @author Zakaria Kasmi <zkasmi@inf.fu-berlin.de>
* @note $Id$
*/
#include <string.h>
#include "board.h"
#include "msba2_common.h"
#include "lpc23xx.h"
#include "cpu.h"
#define CL_CPU_DIV 4
#define WD_INTERVAL 10 /**< number of seconds before WD triggers */
/*---------------------------------------------------------------------------*/
/**
* @brief Enabling MAM and setting number of clocks used for Flash memory fetch
* @internal
*/
static void
init_mam(void)
{
MAMCR = 0x0000;
MAMTIM = 0x0003;
MAMCR = 0x0002;
}
/*---------------------------------------------------------------------------*/
void init_clks2(void)
{
// Wait for the PLL to lock to set frequency
while (!(PLLSTAT & BIT26));
// Connect the PLL as the clock source
PLLCON = 0x0003;
pllfeed();
/* Check connect bit status */
while (!(PLLSTAT & BIT25));
}
void watchdog_init(void)
{
WDCLKSEL = 0; // clock source: RC oscillator
WDMOD &= ~WDTOF; // clear time-out flag
WDTC = (F_RC_OSCILLATOR / 4) * WD_INTERVAL;
}
void bl_init_clks(void)
{
watchdog_init();
PCONP = PCRTC; // switch off everything except RTC
init_clks1();
init_clks2();
init_mam();
}
/*---------------------------------------------------------------------------*/