166 lines
4.9 KiB
C
166 lines
4.9 KiB
C
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//*----------------------------------------------------------------------------
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//* ATMEL Microcontroller Software Support - ROUSSET -
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//*----------------------------------------------------------------------------
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//* The software is delivered "AS IS" without warranty or condition of any
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//* kind, either express, implied or statutory. This includes without
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//* limitation any warranty or condition with respect to merchantability or
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//* fitness for any particular purpose, or against the infringements of
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//* intellectual property rights of others.
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//*----------------------------------------------------------------------------
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//* File Name : init.c
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//* Object : Low level initialisations written in C
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//* Creation : HIi 10/10/2003
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//*
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//*----------------------------------------------------------------------------
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#include "config.h"
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#include "AT91RM9200.h"
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#include "lib_AT91RM9200.h"
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#include "stdio.h"
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//*----------------------------------------------------------------------------
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//* \fn AT91F_DataAbort
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//* \brief This function reports an Abort
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//*----------------------------------------------------------------------------
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static void AT91F_SpuriousHandler()
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{
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puts("ISI");
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while (1);
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}
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//*----------------------------------------------------------------------------
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//* \fn AT91F_DataAbort
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//* \brief This function reports an Abort
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//*----------------------------------------------------------------------------
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static void AT91F_DataAbort()
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{
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puts("IDA");
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while (1);
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}
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//*----------------------------------------------------------------------------
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//* \fn AT91F_FetchAbort
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//* \brief This function reports an Abort
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//*----------------------------------------------------------------------------
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static void AT91F_FetchAbort()
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{
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puts("IFA");
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while (1);
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}
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//*----------------------------------------------------------------------------
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//* \fn AT91F_UndefHandler
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//* \brief This function reports that no handler have been set for current IT
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//*----------------------------------------------------------------------------
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static void AT91F_UndefHandler()
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{
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puts("IUD");
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while (1);
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}
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//*--------------------------------------------------------------------------------------
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//* Function Name : AT91F_InitSdram
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//* Object : Initialize the SDRAM
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//* Input Parameters :
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//* Output Parameters :
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//*--------------------------------------------------------------------------------------
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static void AT91F_InitSdram()
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{
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int *pRegister;
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//* Configure PIOC as peripheral (D16/D31)
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AT91F_PIO_CfgPeriph(
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AT91C_BASE_PIOC, // PIO controller base address
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0xFFFF0030,
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0
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);
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//*Init SDRAM
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pRegister = (int *)0xFFFFFF98;
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*pRegister = 0x2188c155;
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pRegister = (int *)0xFFFFFF90;
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*pRegister = 0x2;
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pRegister = (int *)0x20000000;
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*pRegister = 0;
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pRegister = (int *)0xFFFFFF90;
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*pRegister = 0x4;
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pRegister = (int *)0x20000000;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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*pRegister = 0;
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pRegister = (int *)0xFFFFFF90;
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*pRegister = 0x3;
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pRegister = (int *)0x20000080;
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*pRegister = 0;
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pRegister = (int *)0xFFFFFF94;
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*pRegister = 0x2e0;
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pRegister = (int *)0x20000000;
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*pRegister = 0;
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pRegister = (int *)0xFFFFFF90;
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*pRegister = 0x00;
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pRegister = (int *)0x20000000;
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*pRegister = 0;
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}
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//*----------------------------------------------------------------------------
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//* \fn AT91F_InitFlash
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//* \brief This function performs low level HW initialization
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//*----------------------------------------------------------------------------
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static void AT91F_InitMemories()
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{
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int *pEbi = (int *)0xFFFFFF60;
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//* Setup MEMC to support all connected memories (CS0 = FLASH; CS1=SDRAM)
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pEbi = (int *)0xFFFFFF60;
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*pEbi = 0x00000002;
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//* CS0 cs for flash
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pEbi = (int *)0xFFFFFF70;
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*pEbi = 0x00003284;
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AT91F_InitSdram();
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}
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//*----------------------------------------------------------------------------
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//* \fn AT91F_LowLevelInit
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//* \brief This function performs very low level HW initialization
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//*----------------------------------------------------------------------------
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void AT91F_LowLevelInit(void)
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{
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int i;
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// Init Interrupt Controller
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AT91F_AIC_Open(
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AT91C_BASE_AIC, // pointer to the AIC registers
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AT91C_AIC_BRANCH_OPCODE, // IRQ exception vector
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AT91F_UndefHandler, // FIQ exception vector
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AT91F_UndefHandler, // AIC default handler
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AT91F_SpuriousHandler, // AIC spurious handler
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0); // Protect mode
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// Perform 8 End Of Interrupt Command to make s<>re AIC will not Lock out nIRQ
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for(i=0; i<8; i++)
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AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
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AT91F_AIC_SetExceptionVector((unsigned int *)0x0C, AT91F_FetchAbort);
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AT91F_AIC_SetExceptionVector((unsigned int *)0x10, AT91F_DataAbort);
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AT91F_AIC_SetExceptionVector((unsigned int *)0x4, AT91F_UndefHandler);
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//Initialize SDRAM and Flash
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AT91F_InitMemories();
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}
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