init.cpp

   1 //*----------------------------------------------------------------------------
   2 //*         ATMEL Microcontroller Software Support  -  ROUSSET  -
   3 //*----------------------------------------------------------------------------
   4 //* The software is delivered "AS IS" without warranty or condition of any
   5 //* kind, either express, implied or statutory. This includes without
   6 //* limitation any warranty or condition with respect to merchantability or
   7 //* fitness for any particular purpose, or against the infringements of
   8 //* intellectual property rights of others.
   9 //*----------------------------------------------------------------------------
  10 //* File Name           : init.c
  11 //* Object              : Low level initialisations written in C
  12 //* Creation            : HIi   10/10/2003
  13 //*
  14 //*----------------------------------------------------------------------------
  15
  16 #include <AT91RM9200.h>
  17 #include <stdio.h>
  18 #include "dataflash.h"
  19 #include <lib_AT91RM9200.h>
  20
  21
  22 //*----------------------------------------------------------------------------
  23 //* \fn    AT91F_DBGU_Printk
  24 //* \brief This function is used to send a string through the DBGU channel (Very low level debugging)
  25 //*----------------------------------------------------------------------------
  26 void AT91F_DBGU_Printk(
  27         char *buffer) // \arg pointer to a string ending by \0
  28 {
  29         while(*buffer != '\0') {
  30                 while (!AT91F_US_TxReady((AT91PS_USART)AT91C_BASE_DBGU));
  31                 AT91F_US_PutChar((AT91PS_USART)AT91C_BASE_DBGU, *buffer++);
  32         }
  33 }
  34
  35 //*----------------------------------------------------------------------------
  36 //* \fn    AT91F_DataAbort
  37 //* \brief This function reports an Abort
  38 //*----------------------------------------------------------------------------
  39 void AT91F_SpuriousHandler()
  40 {
  41         AT91F_DBGU_Printk("-F- Spurious Interrupt detected\n\r");
  42         while (1);
  43 }
  44
  45
  46 //*----------------------------------------------------------------------------
  47 //* \fn    AT91F_DataAbort
  48 //* \brief This function reports an Abort
  49 //*----------------------------------------------------------------------------
  50 typedef enum
  51 {
  52    CHECK_128M,
  53    CHECK_64M,
  54    CHECK_32M,
  55    CHECK_DONE
  56 } check_mem_t;
  57
  58 check_mem_t init_done = CHECK_128M;
  59 void AT91F_DataAbort()
  60 {
  61         AT91F_DBGU_Printk("-F- Data Abort detected\n\r");
  62         while (1);
  63 }
  64
  65 //*----------------------------------------------------------------------------
  66 //* \fn    AT91F_FetchAbort
  67 //* \brief This function reports an Abort
  68 //*----------------------------------------------------------------------------
  69 void AT91F_FetchAbort()
  70 {
  71         AT91F_DBGU_Printk("-F- Prefetch Abort detected\n\r");
  72         while (1);
  73 }
  74
  75 //*----------------------------------------------------------------------------
  76 //* \fn    AT91F_Undef
  77 //* \brief This function reports an Abort
  78 //*----------------------------------------------------------------------------
  79 void AT91F_Undef()
  80 {
  81         AT91F_DBGU_Printk("-F- Undef detected\n\r");
  82         while (1);
  83 }
  84
  85 //*----------------------------------------------------------------------------
  86 //* \fn    AT91F_UndefHandler
  87 //* \brief This function reports that no handler have been set for current IT
  88 //*----------------------------------------------------------------------------
  89 void AT91F_UndefHandler()
  90 {
  91         AT91F_DBGU_Printk("-F- Undef detected\n\r");
  92         while (1);
  93 }
  94
  95
  96 //*--------------------------------------------------------------------------------------
  97 //* Function Name       : AT91F_InitSdram
  98 //* Object              : Initialize the SDRAM
  99 //* Input Parameters    :
 100 //* Output Parameters   :
 101 //*--------------------------------------------------------------------------------------
 102 void AT91F_InitSdram()
 103 {
 104                 volatile int *pRegister;
 105                 int val;
 106
 107                 /* Configure PIOC as peripheral (D16/D31) */
 108
 109                 AT91F_PIO_CfgPeriph(
 110                                 AT91C_BASE_PIOC, // PIO controller base address
 111                                 0xFFFF0030,
 112                                 0
 113                                 );
 114
 115                 /*Init SDRAM */
 116                 pRegister = (volatile int *)0xFFFFFF98;
 117                 *pRegister = (volatile int)get_size_reg();
 118                 pRegister = (volatile int *)0xFFFFFF90;
 119                 *pRegister = 0x2;
 120                 pRegister = (volatile int *)0x20000000;
 121                 *pRegister = 0;
 122                 pRegister = (volatile int *)0xFFFFFF90;
 123                 *pRegister = 0x4;
 124                 pRegister = (volatile int *)0x20000000;
 125                 *pRegister = 0;
 126                 *pRegister = 0;
 127                 *pRegister = 0;
 128                 *pRegister = 0;
 129                 *pRegister = 0;
 130                 *pRegister = 0;
 131                 *pRegister = 0;
 132                 *pRegister = 0;
 133                 pRegister = (volatile int *)0xFFFFFF90;
 134                 *pRegister = 0x3;
 135                 pRegister = (volatile int *)0x20000080;
 136                 *pRegister = 0;
 137
 138                 pRegister = (volatile int *)0xFFFFFF94;
 139                 *pRegister = 0x2e0;
 140                 pRegister = (volatile int *)0x20000000;
 141                 *pRegister = 0;
 142
 143                 pRegister = (volatile int *)0xFFFFFF90;
 144                 *pRegister = 0x00;
 145                 pRegister = (volatile int *)0x20000000;
 146                 *pRegister = 0;
 147
 148
 149 }
 150
 151 //*----------------------------------------------------------------------------
 152 //* \fn    AT91F_InitUdp
 153 //* \brief This function performs low level Udp initialization
 154 //*----------------------------------------------------------------------------
 155
 156 void AT91F_InitUdp()
 157 {
 158   int flag;
 159         AT91F_PIO_CfgInput(AT91C_BASE_PIOD,AT91C_PIO_PD4);
 160         *AT91C_UDP_TXVC = AT91C_UDP_TXVDIS;
 161         AT91F_PIO_CfgOutput(AT91C_BASE_PIOD,AT91C_PIO_PD5);
 162         *AT91C_PMC_SCDR = AT91C_PMC_UDP;
 163         *AT91C_PMC_PCDR = 1 << AT91C_PMC_UDP;
 164 }
 165
 166 //*----------------------------------------------------------------------------
 167 //* \fn    AT91F_InitFlash
 168 //* \brief This function performs low level HW initialization
 169 //*----------------------------------------------------------------------------
 170 void AT91F_InitMemories()
 171 {
 172         /*
 173          * Disable UDB device
 174          */
 175         int *pEbi = (int *)0xFFFFFF60;
 176
 177 //* Setup MEMC to support all connected memories (CS0 = FLASH; CS1=SDRAM)
 178         pEbi = (int *)0xFFFFFF60;
 179         *pEbi = 0x00000002;
 180
 181 //* CS0 cs for flash
 182         pEbi  = (int *)0xFFFFFF70;
 183         *pEbi = 0x00003284;
 184
 185         AT91F_InitSdram();
 186
 187 }
 188
 189
 190
 191 //*----------------------------------------------------------------------------
 192 //* \fn    AT91F_LowLevelInit
 193 //* \brief This function performs very low level HW initialization
 194 //*----------------------------------------------------------------------------
 195
 196 extern "C" void AT91F_LowLevelInit(void)
 197 {
 198
 199         // Init Interrupt Controller
 200         AT91F_AIC_Open(
 201                 AT91C_BASE_AIC,          // pointer to the AIC registers
 202                 AT91C_AIC_BRANCH_OPCODE, // IRQ exception vector
 203                 AT91F_UndefHandler,      // FIQ exception vector
 204                 AT91F_UndefHandler,      // AIC default handler
 205                 AT91F_SpuriousHandler,   // AIC spurious handler
 206                 0);                      // Protect mode
 207
 208         // Perform 8 End Of Interrupt Command to make sure AIC will not Lock out nIRQ
 209         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 210         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 211         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 212         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 213         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 214         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 215         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 216         AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 217
 218         AT91F_AIC_SetExceptionVector((unsigned int *)0x0C, AT91F_FetchAbort);
 219         AT91F_AIC_SetExceptionVector((unsigned int *)0x10, AT91F_DataAbort);
 220         AT91F_AIC_SetExceptionVector((unsigned int *)0x4, AT91F_Undef);
 221
 222         //Initialize SDRAM and Flash
 223         AT91F_InitMemories();
 224
 225         // Open PIO for DBGU
 226         AT91F_DBGU_CfgPIO();
 227
 228         // Configure DBGU
 229         AT91F_US_Configure (
 230                 (AT91PS_USART) AT91C_BASE_DBGU,          // DBGU base address
 231                 48000000,             // 48 MHz
 232                 AT91C_US_ASYNC_MODE,        // mode Register to be programmed
 233                 115200 ,              // baudrate to be programmed
 234                 0);                   // timeguard to be programmed
 235
 236         // Enable Transmitter
 237         AT91F_US_EnableTx((AT91PS_USART)AT91C_BASE_DBGU);
 238         // Enable Receiver
 239         AT91F_US_EnableRx((AT91PS_USART)AT91C_BASE_DBGU);
 240
 241         /* Enable PIO to access the LEDs */
 242         AT91F_PIO_CfgOutput(AT91C_BASE_PIOD,AT91C_PIO_PD6);
 243         /* Enable PIO to manage flash locking */
 244         AT91F_PIO_CfgOutput(AT91C_BASE_PIOB,AT91C_PIO_PC15);
 245
 246
 247
 248         // AT91F_DBGU_Printk("\n\rAT91F_LowLevelInit(): Debug channel initialized\n\r");
 249 }
 250