PythonQ 248-8XX Specifiche Pagina 173
- Pagina / 210
- Indice
- SEGNALIBRI
Valutato. / 5. Basato su recensioni clienti
Question:
I am using U-Boot with a Linux kernel version Y (Y < 2.4.5-pre5), but the last message I see is
Uncompressing Kernel Image ... OK
Then the system hangs.
Answer:
Most probably you pass bad parameters to the Linux kernel.
There are several possible reasons:
Bad device tree; for example, check that the memory map set up by the boot loader (like
mapping of IMMR, PCI addresses etc.) is consistent with what is encoded in your device tree
specification.
◊
Here some possible reasons for older Linux kernel versions:
Linux:
arch/ppc:
arch/ppc: Bad definition of the bd_info structure
You must make sure that your machine specific header file (for instance
include/asm-ppc/tqm8xx.h) includes the same definition of the Board Information structure as
we define in include/ppcboot.h, and make sure that your definition of IMAP_ADDR uses the
same value as your U-Boot configuration in CFG_IMMR.
◊
Bad clock information
Before kernel version 2.4.5-pre5 (BitKeeper Patch 1.1.1.6, 22MAY2001) the kernel expected
the clock information in MHz, but recent kernels expect it in Hz instead. U-Boot passes the
clock information in Hz by default. To switch to the old behaviour, you can set the
environment variable "clocks_in_mhz" in U-Boot:
◊
=> setenv clocks_in_mhz 1
=> saveenv
For recent kernel the "clocks_in_mhz" variable must not be set. If it is present in your environment, you
can delete it as follows:
=> setenv clocks_in_mhz
=> saveenv
A common error is to try "setenv clocks_in_mhz 0" or to some other value - this will not work,
as the value of the variable is not important at all. It is the existence of the variable that will be checked.
Inconsistent memory map
Some boards may need corrct mappings for some special hardware devices like BCSR (Board
Control and Status Registers) etc. Verify that the mappings expected by Linux match those
created by U-Boot.
♦ •
14.2.22. How can I implement automatic software
updates?
Question:
How I can use U-Boot to make it easy for my end users to upgrade the firmware of the device?
14.2.22. How can I implement automatic software updates? 173
- 1. Abstract 6
- 2. Introduction 7
- 3.1. ELDK Availability 10
- 3.2. ELDK Getting Help 10
- 3.3. Supported Host Systems 10
- 3.5. Installation 11
- 3.5.1. Product Packaging 11
- 3.5.2. Downloading the ELDK 11
- 3.5.3. Initial Installation 12
- Packages 13
- 3.6. Working with ELDK 14
- $ arm-linux-gcc -c myfile.c 15
- 3.9. ELDK Packages 18
- 3.10.3. build.sh Usage 28
- 4. System Setup 30
- 4.8. Configuring a NFS Server 34
- 5. Das U-Boot 36
- 5.1. Current Versions 36
- 5.3. Configuration 37
- 5.4. Installation 38
- 5.4.1. Before You Begin 38
- 5.5. Tool Installation 39
- 5.6. Initialization 39
- 5.7. Initial Steps 40
- 5.8. The First Power-On 41
- 5.9.1. Information Commands 42
- 5.9.2. Memory Commands 44
- 5.9.2.3. cmp - memory compare 45
- 5.9.2.4. cp - memory copy 46
- 5.9.2.5. md - memory display 46
- 5.9.3. Flash Memory Commands 50
- 5.9.3.6. UBI Usage in U-Boot 54
- Useful definitions: 58
- 5.9.5. Download Commands 61
- 5.9.9. Storage devices 72
- 5.9.9.1. MMC devices 72
- 5.9.8. Special Commands 72
- 5.9.9.1. MMC devices 74 74
- 5.9.9.1. MMC devices 75 75
- 5.9.9.2. NAND devices 76
- 5.13. U-Boot Image Formats 84
- 5.14.1. Boot Count Limit 84
- 6.3. Installation 86
- 7. Booting Embedded Linux 87
- 7.1. Introduction 87
- 7.3. Passing Kernel Arguments 88
- 7.4. Boot Arguments Unleashed 88
- 8. Building and Using Modules 96
- 9. Advanced Topics 97
- 9.1. Flash Filesystems 97
- 9.1.3. Second Version of JFFS 99
- 9.1.5.1. Create Device Files 101
- 9.2.1. Mount Parameters 107
- $ mkfs.jffs2 -U \ 114
- Using FEC ETHERNET device 115
- Load address: 0x100000 115
- => printenv addip 115
- /proc on /proc type proc (rw) 116
- FAT File System 121
- 9.7. Overlay File Systems 126
- What it is good for? 127
- Examples 127
- # insmod mini_fo.o 128
- Performance overhead 128
- Further information 129
- 9.8.1. Mount Parameters 129
- 9.8.2. Example 129
- 10. Debugging 130
- 10.1. Debugging of U-Boot 130
- 10.2. Linux Kernel Debugging 131
- 10.4. Tips and Tricks 135
- 10.5. Application Debugging 135
- 10.5.2. Remote Debugging 136
- 12.1. Application Notes 137
- 12.2. Further Reading 137
- 12.2.2. Linux kernel 138
- Articles 138
- Standards: 139
- 12.2.4. Network Programming 139
- 12.2.10. Embedded Topics 141
- 12.3. Mailing Lists 142
- 12.4. Links 142
- 12.5. Tools 143
- 13. Appendix 143
- 13.1. Flat Device Tree 144 144
- 13.1. Flat Device Tree 145 145
- 13.1. Flat Device Tree 146 146
- ELDK Installation Hangs 151
- 14.1.11. Enable SSH Access 158
- 14.2. U-Boot 159
- -mrelocatable 160
- Compiler 164
- 14.2.12. Erasing Flash Fails 165
- $ make tools/gen_eth_addr 166
- $ tools/gen_eth_addr 166
- 14.2.17.2. Hush shell 169
- 14.2.17.3. Hush shell scripts 170
- 14.2.17.4. General rules 171
- => setenv clocks_in_mhz 1 173
- => saveenv 173
- => setenv clocks_in_mhz 173
- Rebooting in 1 seconds 178
- # cat /etc/blank_off 181
- # cat /etc/init_tty 181
- Multi-File Image 183
- 14.3.26.1. XIP Kernel 191
- 14.3.26.2. Cramfs Filesystem 192
- 14.3.26.3. Hints and Notes 193
- 14.3.30. Swapping over NFS 196
- 14.4. Self 198
- 14.5. RTAI 200
- 14.6. BDI2000 201
- 14.7. Motorola LITE5200 Board 203
- 15. Glossary 204
- YellowDog 210
Prodotti e manuali riguardandi Sistemi per la saldatura PythonQ 248-8XX
Summit BIM24OS Handbücher
Bedienungsanleitungen und Benutzerhandbücher für Kühlschränke Summit BIM24OS.
Wir stellen 1 PDF-Handbücher Summit BIM24OS zum kostenlosen herunterladen nach Dokumenttypen zur Verfügung Bedienungsanleitung
Summit BIM24OS Bedienungsanleitung (8 Seiten)
Marke: Summit | Kategorie: Refrigerators | Größe: 0.10 MB |
Weitere Produkte und Handbücher für Kühlschränke Summit
| Modelle | Dokumententyp |
|---|---|
| SPR626OS2D |
Bedienungsanleitung
Summit SPR626OS2D User Manual,
16 Seiten
|
| FFAR9L |
Bedienungsanleitung
Summit FFAR9L User Manual,
12 Seiten
|
| SPR315OS |
Bedienungsanleitung
Summit SPR315OS User Manual,
16 Seiten
|
| FF945SLV |
Bedienungsanleitung
Summit FF945SLV User Manual,
2 Seiten
|
| FF73 |
Bedienungsanleitung
Summit FF73 User Manual,
13 Seiten
|
| FF1116W |
Bedienungsanleitung
Summit FF1116W User Manual,
14 Seiten
|
| FF1274 |
Bedienungsanleitung
Summit FF1274 User Manual,
18 Seiten
|
| CP96 |
Bedienungsanleitung
Summit CP96 User Manual,
14 Seiten
|
| FF1426PL |
Bedienungsanleitung
Summit FF1426PL User Manual,
3 Seiten
|
| FF1062WSSIM |
Bedienungsanleitung
Summit FF1062WSSIM User Manual,
2 Seiten
|
| FF1074 |
Bedienungsanleitung
 
Summit FF1074 User Manual,
56 Seiten
|
| FF1625SS |
Bedienungsanleitung
Summit FF1625SS User Manual,
16 Seiten
|
| FFBF171SS |
Bedienungsanleitung
Summit FFBF171SS User Manual [en] ,
18 Seiten
|
| FF1074IM |
Bedienungsanleitung
Summit FF1074IM User Manual,
14 Seiten
|
| CP97R-1 |
Bedienungsanleitung
Summit CP97R-1 User Manual,
16 Seiten
|
| CP171 Series |
Bedienungsanleitung
Summit CP171 Series User Manual,
16 Seiten
|
| FF71 |
Bedienungsanleitung
Summit FF71 User Manual,
12 Seiten
|
© 2020, manymanuals.it. Tutti i diritti riservati | 0.031 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commenti su questo manuale