tcl/board/eir.cfg

   1 # Elector Internet Radio board
   2 # http://www.ethernut.de/en/hardware/eir/index.html
   3
   4 source [find target/sam7se512.cfg]
   5
   6 $_TARGETNAME configure -event reset-init {
   7         # WDT_MR, disable watchdog
   8         mww 0xFFFFFD44 0x00008000
   9
  10         # RSTC_MR, enable user reset
  11         mww 0xfffffd08 0xa5000001
  12
  13         # CKGR_MOR
  14         mww 0xFFFFFC20 0x00000601
  15         sleep 10
  16
  17         # CKGR_PLLR
  18         mww 0xFFFFFC2C 0x00481c0e
  19         sleep 10
  20
  21         # PMC_MCKR
  22         mww 0xFFFFFC30 0x00000007
  23         sleep 10
  24
  25         # PMC_IER
  26         mww 0xFFFFFF60 0x00480100
  27
  28         #
  29         # Enable SDRAM interface.
  30         #
  31
  32         # Enable SDRAM control at PIO A.
  33         mww 0xfffff474 0x3f800000 # PIO_BSR_OFF
  34         mww 0xfffff404 0x3f800000 # PIO_PDR_OFF
  35
  36         # Enable address bus (A0, A2-A11, A13-A17) at PIO B
  37         mww 0xfffff674 0x0003effd # PIO_BSR_OFF
  38         mww 0xfffff604 0x0003effd # PIO_PDR_OFF
  39
  40         # Enable 16 bit data bus at PIO C
  41         mww 0xfffff870 0x0000ffff # PIO_ASR_OFF
  42         mww 0xfffff804 0x0000ffff # PIO_PDR_OFF
  43
  44         # Enable SDRAM chip select
  45         mww 0xffffff80 0x00000002 # EBI_CSA_OFF
  46
  47         # Set SDRAM characteristics in configuration register.
  48         # Hard coded values for MT48LC32M16A2 with 48MHz CPU.
  49         mww 0xffffffb8 0x2192215a # SDRAMC_CR_OFF
  50         sleep 10
  51
  52         # Issue 16 bit SDRAM command: NOP
  53         mww 0xffffffb0 0x00000011 # SDRAMC_MR_OFF
  54         mww 0x20000000 0x00000000
  55
  56         # Issue 16 bit SDRAM command: Precharge all
  57         mww 0xffffffb0 0x00000012 # SDRAMC_MR_OFF
  58         mww 0x20000000 0x00000000
  59
  60         # Issue 8 auto-refresh cycles
  61         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  62         mww 0x20000000 0x00000000
  63         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  64         mww 0x20000000 0x00000000
  65         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  66         mww 0x20000000 0x00000000
  67         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  68         mww 0x20000000 0x00000000
  69         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  70         mww 0x20000000 0x00000000
  71         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  72         mww 0x20000000 0x00000000
  73         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  74         mww 0x20000000 0x00000000
  75         mww 0xffffffb0 0x00000014 # SDRAMC_MR_OFF
  76         mww 0x20000000 0x00000000
  77
  78         # Issue 16 bit SDRAM command: Set mode register
  79         mww 0xffffffb0 0x00000013 # SDRAMC_MR_OFF
  80         mww 0x20000014 0xcafedede
  81
  82         # Set refresh rate count ???
  83         mww 0xffffffb4 0x00000013 # SDRAMC_TR_OFF
  84
  85         # Issue 16 bit SDRAM command: Normal mode
  86         mww 0xffffffb0 0x00000010 # SDRAMC_MR_OFF
  87         mww 0x20000000 0x00000180
  88
  89         #
  90         # Enable external reset key.
  91         #
  92         mww 0xfffffd08 0xa5000001
  93 }
  94