tcl/board/mcb1700.cfg

   1 # Keil MCB1700 PCB with 1768
   2 #
   3 # Reset init script sets it to 100MHz
   4 set CCLK 100000
   5
   6 source [find target/lpc17xx.cfg]
   7
   8 global MCB1700_CCLK
   9 set MCB1700_CCLK $CCLK
  10
  11 $_TARGETNAME configure -event reset-start {
  12         # Start *real slow* as we do not know the
  13     # state the boot rom left the clock in
  14         adapter_khz 10
  15 }
  16
  17 # Set up 100MHz clock to CPU
  18 $_TARGETNAME configure -event reset-init {
  19     # PLL0CON: Disable PLL
  20         mww 0x400FC080 0x00000000
  21     # PLLFEED
  22         mww 0x400FC08C 0x000000AA
  23     # PLLFEED
  24         mww 0x400FC08C 0x00000055
  25
  26     # CCLK=PLL/4 (=100 MHz)
  27         mww 0x400FC104 0x00000003
  28     # CLKSRCSEL: Clock source = internal RC oscillator
  29         mww 0x400FC10C 0x00000000
  30
  31     # PLL0CFG: M=50,N=1 -> PLL=400 MHz
  32         mww 0x400FC084 0x00000031
  33     # PLLFEED
  34         mww 0x400FC08C 0x000000AA
  35     # PLLFEED
  36         mww 0x400FC08C 0x00000055
  37
  38         # PLL0CON: Enable PLL
  39         mww 0x400FC080 0x00000001
  40     # PLLFEED
  41         mww 0x400FC08C 0x000000AA
  42     # PLLFEED
  43         mww 0x400FC08C 0x00000055
  44
  45         sleep 50
  46
  47     # PLL0CON: Connect PLL
  48         mww 0x400FC080 0x00000003
  49     # PLLFEED
  50         mww 0x400FC08C 0x000000AA
  51     # PLLFEED
  52         mww 0x400FC08C 0x00000055
  53
  54         # Dividing CPU clock by 8 should be pretty conservative
  55         #
  56         #
  57         global MCB1700_CCLK
  58         adapter_khz [expr $MCB1700_CCLK / 8]
  59
  60         # Do not remap 0x0000-0x0020 to anything but the flash (i.e. select
  61         # "User Flash Mode" where interrupt vectors are _not_ remapped,
  62         # and reside in flash instead).
  63         #
  64         # See Table 612. Memory Mapping Control register (MEMMAP - 0x400F C040) bit description
  65         # Bit Symbol Value Description Reset
  66         # value
  67         # 0 MAP Memory map control. 0
  68         # 0 Boot mode. A portion of the Boot ROM is mapped to address 0.
  69         # 1 User mode. The on-chip Flash memory is mapped to address 0.
  70         # 31:1 - Reserved. The value read from a reserved bit is not defined. NA
  71         #
  72         # http://ics.nxp.com/support/documents/microcontrollers/?scope=LPC1768&type=user
  73
  74         mww 0x400FC040 0x01
  75 }