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板子不停重启怎么解决

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小胖子 发表于 2010-7-14 09:16:01 | 显示全部楼层 |阅读模式
我在做《step by step》的step12串口测试时,编译好了镜像zImage,下载到了nand flash中。但是nand flash因为u-boot的原因,系统不断重启,无法进行试验。可是如果没有u-boot,串口信息就不会出现。说明u-boot需要修改一下。请问怎么解决这个问题。重启是因为看门狗导致的,我在编写裸机程序时也遇到了相同的问题,把WTCON设置成0就可以了。
    请天嵌的科技人员帮我解决这个问题。:)
亚瑟王 发表于 2010-7-14 20:09:33 | 显示全部楼层
串口出现什么打印信息?
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 楼主| 小胖子 发表于 2010-7-15 09:02:06 | 显示全部楼层
2# 亚瑟王

##### EmbedSky BIOS for SKY2440/TQ2440 #####
Press Space key to Download Mode !
Booting Linux ...
Copy linux kernel from 0x00200000 to 0x30008000, size = 0x00200000 ... Copy Kernel to SDRAM done,NOW, Booting Linux......
Uncompressing Linux............................................................................................................................... done, booting the kernel.
Linux version 2.6.30.4-EmbedSky (root@localhost.localdomain) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-176) ) #5 Tue Jul 13 16:07:27 CST 2010
CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
CPU: VIVT data cache, VIVT instruction cache
Machine: SMDK2440
ATAG_INITRD is deprecated; please update your bootloader.
Memory policy: ECC disabled, Data cache writeback
CPU S3C2440A (id 0x32440001)
S3C24XX Clocks, (c) 2004 Simtec Electronics
S3C244X: core 400.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz
CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0
NR_IRQS:85
irq: clearing pending ext status 00080000
irq: clearing subpending status 00000002
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour dummy device 80x30
console [ttySAC0] enabled
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 60664KB available (3616K code, 377K data, 116K init, 0K highmem)
SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Calibrating delay loop... 199.47 BogoMIPS (lpj=498688)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
net_namespace: 936 bytes
NET: Registered protocol family 16
S3C Power Management, Copyright 2004 Simtec Electronics
S3C2440: Initialising architecture
S3C2440: IRQ Support
S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics
DMA channel 0 at c4808000, irq 33
DMA channel 1 at c4808040, irq 34
DMA channel 2 at c4808080, irq 35
DMA channel 3 at c48080c0, irq 36
S3C244X: Clock Support, DVS off
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
s3c2440-i2c s3c2440-i2c: slave address 0x10
s3c2440-i2c s3c2440-i2c: bus frequency set to 97 KHz
s3c2440-i2c s3c2440-i2c: i2c-0: S3C I2C adapter
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
NET: Registered protocol family 1
NetWinder Floating Point Emulator V0.97 (extended precision)
JFFS2 version 2.2. (NAND) (SUMMARY)  漏 2001-2006 Red Hat, Inc.
ROMFS MTD (C) 2007 Red Hat, Inc.
yaffs Jul 12 2010 10:54:44 Installing.
msgmni has been set to 118
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
GPIO-Control initialized
PWM-Test initialized
adc initialized
lp: driver loaded but no devices found
ppdev: user-space parallel port driver
s3c2440-uart.0: tq2440_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440
s3c2440-uart.1: tq2440_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440
s3c2440-uart.2: tq2440_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440
brd: module loaded
loop: module loaded
Uniform Multi-Platform E-IDE driver
ide-gd driver 1.18
ide-cd driver 5.00
Driver 'sd' needs updating - please use bus_type methods
dm9000 Ethernet Driver, V1.31
Now use the default MAC address: 10:23:45:67:89:ab
eth0 (dm9000): not using net_device_ops yet
eth0: dm9000e at c4872000,c4876004 IRQ 51 MAC: 10:23:45:67:89:ab (EmbedSky)
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
s3c2440-nand s3c2440-nand: Tacls=2, 20ns Twrph0=3 30ns, Twrph1=2 20ns
NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-bit)
Scanning device for bad blocks
Bad eraseblock 670 at 0x0000053c0000
Creating 3 MTD partitions on "NAND 256MiB 3,3V 8-bit":
0x000000000000-0x000000040000 : "EmbedSky_Board_uboot"
0x000000200000-0x000000400000 : "EmbedSky_Board_kernel"
0x000000400000-0x00000ff80000 : "EmbedSky_Board_yaffs2"
usbmon: debugfs is not available
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
usbcore: registered new interface driver libusual
usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for FTDI USB Serial Device
usbcore: registered new interface driver ftdi_sio
ftdi_sio: v1.4.3:USB FTDI Serial Converters Driver
USB Serial support registered for pl2303
usbcore: registered new interface driver pl2303
pl2303: Prolific PL2303 USB to serial adaptor driver
mice: PS/2 mouse device common for all mice
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling
s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: starting watchdog timer
s3c2410-wdt s3c2410-wdt: watchdog active, reset abled, irq enabled
mapped channel 0 to 0
s3c2440-sdi s3c2440-sdi: powered down.
s3c2440-sdi s3c2440-sdi: initialisation done.
Advanced Linux Sound Architecture Driver Version 1.0.18a.
ALSA device list:
  No soundcards found.
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
s3c2440-sdi s3c2440-sdi: powered down.
s3c2410-rtc s3c2410-rtc: setting system clock to 2001-01-01 03:05:39 UTC (978318339)
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs: auto selecting yaffs2
block 639 is bad
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 116K
Warning: unable to open an initial console.
Failed to execute /linuxrc.  Attempting defaults...
Kernel panic - not syncing: No init found.  Try passing init= option to kernel.
[<c002bac4>] (unwind_backtrace+0x0/0xe8) from [<c02c4f14>] (panic+0x44/0x124)
[<c02c4f14>] (panic+0x44/0x124) from [<c00254f4>] (init_post+0xe4/0x170)
[<c00254f4>] (init_post+0xe4/0x170) from [<c00085b0>] (kernel_init+0xc4/0xec)
[<c00085b0>] (kernel_init+0xc4/0xec) from [<c004b78c>] (do_exit+0x0/0x5fc)
[<c004b78c>] (do_exit+0x0/0x5fc) from [<00000000>] (0x0)


然后就不停得重启了,我给nand flash烧写了天嵌自己的3.5寸屏的u-boot。
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achyh 发表于 2010-7-15 19:08:19 | 显示全部楼层
如果是256M的nand,把Uboot重新烧一下,烧最新的20100601
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 楼主| 小胖子 发表于 2010-7-15 19:36:52 | 显示全部楼层
4# achyh
我的是天嵌TQ2440,nand flash是256M的,我会下载新的u-boot试一试,谢谢你啊!
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 楼主| 小胖子 发表于 2010-7-15 19:46:12 | 显示全部楼层
3# 小胖子
我下载了6月最新的u-boot源码,请问怎么产生.BIN文件的镜像呢,教材里面没有哇!
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 楼主| 小胖子 发表于 2010-7-15 20:56:24 | 显示全部楼层
4# achyh
兄弟,你好,我下载了最新的u-boot源码,编译产生了u-boot.bin文件,烧写到开发板后,板子还是不停地重启。看来不是u-boot的问题,是芯片一上电看门狗就会设置成功。你看怎么解决这个问题呢?
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liushuiyue 发表于 2010-7-16 13:52:22 | 显示全部楼层
你单纯启动uboot是否会重启,看看你uboot中nand的移植是否成功?我以前是因为uboot中nand读写有问题uboot启动时就重启了
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 楼主| 小胖子 发表于 2010-7-17 09:44:06 | 显示全部楼层
8# liushuiyue
板子加载了文件系统,还是不停重启,下面是串口打印信息:
    ……
    TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
s3c2410-rtc s3c2410-rtc: setting system clock to 2001-01-03 03:37:46 UTC (978493066)
s3c2440-sdi s3c2440-sdi: powered down.
end_request: I/O error, dev mtdblock2, sector 256
isofs_fill_super: bread failed, dev=mtdblock2, iso_blknum=64, block=128
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs: auto selecting yaffs2
block 639 is bad
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 116K
/etc/init.d/rcS: line 13: mkdir/dev/pts: not found
mount: can't find devpts/dev/pts in /etc/fstab
/etc/init.d/rcS: line 15: echo/sbin/mdev: not found
mkdir: invalid option -- '/'
BusyBox v1.13.0 (2010-07-13 14:51:39 CST) multi-call binary

Usage: mkdir [OPTION] DIRECTORY...

Create DIRECTORY

Options:
        -m      Set permission mode (as in chmod), not rwxrwxrwx - umask
        -p      No error if existing, make parent directories as needed


Please press Enter to activate this console. d^H
-bin/sh: id-un: not found
[root@EmbedSky/]#$rz

     到最后,来不及给串口发送指令,板子就重启了,好郁闷啊
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亚瑟王 发表于 2010-7-17 14:56:02 | 显示全部楼层
你没有喂狗,你把喂狗程序添加到文件系统中,就行了,方法在移植教程中讲解了的。
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亚瑟王 发表于 2010-7-17 14:56:38 | 显示全部楼层
你没有喂狗,你把喂狗程序添加到文件系统中,就行了,方法在移植教程中讲解了的。
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loopzhong 发表于 2010-8-10 11:52:13 | 显示全部楼层
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: starting watchdog timer
s3c2410-wdt s3c2410-wdt: watchdog active, reset abled, irq enabled

------------------------
看门狗已经启动了,应该是没喂狗。
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