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.
5 There are three differences between the Yoo-ported RPXlite and the RPXlite_DW.
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
11 This fireware is specially coded for EmbeddedPlanet Co. Software Development
12 Platform(RPXlite DW),which has a NEC NL6448BC20-08 LCD panel.
14 It has the following three features:
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
20 make RPXlite_DW_64_config
23 2. CFG_ENV_IS_IN_FLASH/CFG_ENV_IS_IN_NVRAM
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:
31 make RPXlite_DW_NVRAM_config
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.
42 To get a LCD support u-boot,you can do the following:
44 make RPXlite_DW_LCD_config
47 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
48 The basic make commands could be:
50 make RPXlite_DW_config
51 make RPXlite_DW_64_config
52 make RPXlite_DW_LCD_config
53 make RPXlite_DW_NVRAM_config
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:
58 make RPXlite_DW_NVRAM_64_LCD_config
61 So other combining make commands could be:
63 make RPXlite_DW_NVRAM_64_config
64 make RPXlite_DW_NVRAM_LCD_config
65 make RPXlite_DW_64_LCD_config
67 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
69 The boot process by "make RPXlite_DW_config" could be:
71 U-Boot 1.1.1 (Jun 8 2004 - 11:16:30)
73 CPU: PPC823EZTnnB2 at 48 MHz: 16 kB I-Cache 8 kB D-Cache
77 *** Warning - bad CRC, using default environment
85 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
92 Sam Song, samsongshu@yahoo.com.cn
93 Institute of Electrical Machinery and Controls