upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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97 lines
3.0 KiB
97 lines
3.0 KiB
21 years ago
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After following the step of Yoo. Jonghoon and Wolfgang Denk,
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I ported u-boot on RPXlite DW version board: RPXlite_DW or LITE_DW.
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There are three differences between the Yoo-ported RPXlite and the RPXlite_DW.
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Board(in U-BOOT) version(in EmbeddedPlanet) CPU SDRAM FLASH
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RPXlite RPXlite CW 850 16MB 4MB
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RPXlite_DW RPXlite DW 823e 64MB 16MB
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This fireware is specially coded for EmbeddedPlanet Co. Software Development
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Platform(RPXlite DW),which has a NEC NL6448BC20-08 LCD panel.
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It has the following three features:
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1. 64MHz/48MHz system frequence setting options.
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The default setting is 48MHz.To get a 64MHz u-boot,just add
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'64' in make command,like
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make RPXlite_DW_64_config
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make all
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2. CFG_ENV_IS_IN_FLASH/CFG_ENV_IS_IN_NVRAM
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The default environment parameter is stored in FLASH because it is a common choice for
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environment parameter.So I make NVRAM as backup parameter storeage.The reason why I
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didn't use EEPROM for ENV is that PlanetCore V2.0 use EEPROM as environment parameter
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home.Because of the possibility of using two firewares on this board,I didn't
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'disturb' EEPROM.To get NVRAM support,you may use the following build command:
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make RPXlite_DW_NVRAM_config
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make all
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3. LCD panel support
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To support the Platform better,I added LCD panel(NL6448BC20-08) function.But bewear of
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the fact that once you build this support and program it to FLASH,you should make sure
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you put workable kernel and ramdisk at the right place in FLASH or through NFS.
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Otherwise, you must erase this fireware manually via BDI2000 or ICE tools.So this
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function is used for deployment and demo only.Pls look before you leap.
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To get a LCD support u-boot,you can do the following:
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make RPXlite_DW_LCD_config
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make all
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The basic make commands could be:
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make RPXlite_DW_config
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make RPXlite_DW_64_config
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make RPXlite_DW_LCD_config
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make RPXlite_DW_NVRAM_config
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BTW,you can combine the above features together and get a workable u-boot to meet your need.
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For example,to get a 64MHZ && ENV_IS_IN_FLASH && LCD panel support u-boot,you can type:
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make RPXlite_DW_NVRAM_64_LCD_config
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make all
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So other combining make commands could be:
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make RPXlite_DW_NVRAM_64_config
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make RPXlite_DW_NVRAM_LCD_config
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make RPXlite_DW_64_LCD_config
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The boot process by "make RPXlite_DW_config" could be:
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U-Boot 1.1.1 (Jun 8 2004 - 11:16:30)
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CPU: PPC823EZTnnB2 at 48 MHz: 16 kB I-Cache 8 kB D-Cache
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Board: RPXlite_DW
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DRAM: 64 MB
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FLASH: 16 MB
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*** Warning - bad CRC, using default environment
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In: serial
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Out: serial
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Err: serial
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Net: SCC ETHERNET
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u-boot>
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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I'd like to extend my heartfelt gratitute to kind people for helping me work it out.
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I would particually thank Wolfgang Denk for his nice help.
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Enjoy,
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Sam Song, samsongshu@yahoo.com.cn
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Institute of Electrical Machinery and Controls
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Shanghai University
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June 8,2004
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