forked from Imagelibrary/rtems
9964895866
Adjust build support files to new directory layout. This patch is a part of the BSP source reorganization. Update #3285.
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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* LPC22XX/LPC21xx Startup code
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*/
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/*
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* Copyright (c) 2007 by Ray Xu <rayx.cn@gmail.com>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp.h>
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#include <bsp/irq-generic.h>
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#include <lpc22xx.h>
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/*
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* bsp_start_default - BSP initialization function
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*
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* This function is called before RTEMS is initialized and used
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* adjust the kernel's configuration.
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*
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* This function also configures the CPU's memory protection unit.
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*
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* RESTRICTIONS/LIMITATIONS:
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* Since RTEMS is not configured, no RTEMS functions can be called.
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*/
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static void bsp_start_default( void )
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{
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PINSEL2 =0x0f814914;
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BCFG0 = 0x1000ffef;
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BCFG1 = 0x1000ffef;
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MEMMAP = 0x2; //debug and excute outside chip
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PLLCON = 1;
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#if (Fpclk / (Fcclk / 4)) == 1
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VPBDIV = 0;
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#endif
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#if (Fpclk / (Fcclk / 4)) == 2
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VPBDIV = 2;
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#endif
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#if (Fpclk / (Fcclk / 4)) == 4
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VPBDIV = 1;
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#endif
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#if (Fcco / Fcclk) == 2
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PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
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#endif
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#if (Fcco / Fcclk) == 4
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PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
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#endif
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#if (Fcco / Fcclk) == 8
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PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
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#endif
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#if (Fcco / Fcclk) == 16
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PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
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#endif
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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while((PLLSTAT & (1 << 10)) == 0);
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PLLCON = 3;
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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/* memory configure */
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/* it is not needed in my formatter board */
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//MAMCR = 0;
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// MAMTIM = 3;
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//MAMCR = 2;
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UART0_Ini();
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/*
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* Init rtems interrupt management
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*/
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bsp_interrupt_initialize();
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} /* bsp_start */
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/*
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* By making this a weak alias for bsp_start_default, a brave soul
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* can override the actual bsp_start routine used.
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*/
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void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
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