board/RPXlite_dw/README

   1
   2 After following the step of Yoo. Jonghoon and Wolfgang Denk,
   3 I ported u-boot on RPXlite DW version board: RPXlite_DW or LITE_DW.
   4
   5 There are three differences between the Yoo-ported RPXlite and the RPXlite_DW.
   6
   7 Board(in U-BOOT)        version(in EmbeddedPlanet)      CPU     SDRAM   FLASH
   8 RPXlite                         RPXlite CW              850     16MB    4MB
   9 RPXlite_DW                      RPXlite DW              823e    64MB    16MB
  10
  11 This fireware is specially coded for EmbeddedPlanet Co. Software Development
  12 Platform(RPXlite DW),which has a NEC NL6448BC20-08 LCD panel.
  13
  14 It has the following three features:
  15
  16 1. 64MHz/48MHz system frequence setting options.
  17 The default setting is 48MHz.To get a 64MHz u-boot,just add
  18 '64' in make command,like
  19
  20 make RPXlite_DW_64_config
  21 make all
  22
  23 2. CFG_ENV_IS_IN_FLASH/CFG_ENV_IS_IN_NVRAM
  24
  25 The default environment parameter is stored in FLASH because it is a common choice for
  26 environment parameter.So I make NVRAM as backup parameter storeage.The reason why I
  27 didn't use EEPROM for ENV is that PlanetCore V2.0 use EEPROM as environment parameter
  28 home.Because of the possibility of using two firewares on this board,I didn't
  29 'disturb' EEPROM.To get NVRAM support,you may use the following build command:
  30
  31 make RPXlite_DW_NVRAM_config
  32 make all
  33
  34 3. LCD panel support
  35
  36 To support the Platform better,I added LCD panel(NL6448BC20-08) function.But bewear of
  37 the fact that once you build this support and program it to FLASH,you should make sure
  38 you put workable kernel and ramdisk at the right place in FLASH or through NFS.
  39 Otherwise, you must erase this fireware manually via BDI2000 or ICE tools.So this
  40 function is used for deployment and demo only.Pls look before you leap.
  41
  42 To get a LCD support u-boot,you can do the following:
  43
  44 make RPXlite_DW_LCD_config
  45 make all
  46
  47 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  48 The basic make commands could be:
  49
  50 make RPXlite_DW_config
  51 make RPXlite_DW_64_config
  52 make RPXlite_DW_LCD_config
  53 make RPXlite_DW_NVRAM_config
  54
  55 BTW,you can combine the above features together and get a workable u-boot to meet your need.
  56 For example,to get a 64MHZ && ENV_IS_IN_FLASH && LCD panel support u-boot,you can type:
  57
  58 make RPXlite_DW_NVRAM_64_LCD_config
  59 make all
  60
  61 So other combining make commands could be:
  62
  63 make RPXlite_DW_NVRAM_64_config
  64 make RPXlite_DW_NVRAM_LCD_config
  65 make RPXlite_DW_64_LCD_config
  66
  67 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  68
  69 The boot process by "make RPXlite_DW_config" could be:
  70
  71 U-Boot 1.1.1 (Jun  8 2004 - 11:16:30)
  72
  73 CPU:   PPC823EZTnnB2 at 48 MHz: 16 kB I-Cache 8 kB D-Cache
  74 Board: RPXlite_DW
  75 DRAM:  64 MB
  76 FLASH: 16 MB
  77 *** Warning - bad CRC, using default environment
  78
  79 In:    serial
  80 Out:   serial
  81 Err:   serial
  82 Net:   SCC ETHERNET
  83 u-boot>
  84
  85 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  86
  87 I'd like to extend my heartfelt gratitute to kind people for helping me work it out.
  88 I would particually thank Wolfgang Denk for his nice help.
  89
  90 Enjoy,
  91
  92 Sam Song, samsongshu@yahoo.com.cn
  93 Institute of Electrical Machinery and Controls
  94 Shanghai University
  95
  96 June 8,2004