在家想玩玩6410，串口转接线没有带过来。
重新制作了一根。
pc端，我是usb转串口（公口）
arm机子端，是个公口的。
那么，转接线是母对母。
接到串口00上。这个板子还有个串口3.
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我本以为就是个延长线，但是发现，不是那么简单的。不是直连的方式，是交叉方式。
连接方式是交叉连接 5--5 ，2--3 ，3--2，这样才能输出信息。
==========
http://blog.ednchina.com/talent8791/193228/message.aspx 前辈探讨了这个问题：
近来搞ARM9，前段时间，从师兄拿了块广嵌的开发板，但是，启动开机串口就没有输出信息！郁闷了，后来在相关群里问了才知道，串口也分直连和交叉，和网线类似。从这次中，我得到一下结论：
第一：51单片机，ARM7的开发板基本上都是用直连串口线的（串口调试）（是否是直连和交叉要看电路设计者的电路设计咯）；
第二：ARM9基本就是用交叉串口线来输出开机信息的！（电路是这样设计的，嘿嘿）
第三：确定串口输出是否正常的方法就是用示波器观察串口的2和3脚，看是否有输出信息！
第四：直连的，2脚与2脚导通；交叉的，2脚与3脚导通！
================
realarm 6410 version 3.1 的linux输出信息为：
OK
U-Boot 1.1.6 (Jun 18 2010 - 23:35:06) for SMDK6410
CPU: S3C6410@800MHz
Fclk = 800MHz, Hclk = 133MHz, Pclk = 66MHz, Serial = CLKUART (SYNC Mode)
Board: SMDK6410
DRAM: 256 MB
Flash: 0 kB
NAND: Maf. ID is d3
1024 MB
In: serial
Out: serial
Err: serial
Hit any key to stop autoboot: 0
NAND read: device 0 offset 0x40000, size 0x300000 NAND的偏移地址吧。
s3c-nand: 1 bit(s) error detected, corrected successfully
3145728 bytes read: OK
Boot with zImage
Starting kernel ...
Uncompressing Linux.................................................................................................................................................................. done, booting the kernel.
Linux version 2.6.28.6 (figo@figo-desktop) (gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72) ) #528 PREEMPT Sun Jun 20 13:56:56 CST 2010 这个是realarm讨论版版主figo，使用的gcc是4.3.2，
CPU: ARMv6-compatible processor [410fb766] revision 6 (ARMv7), cr=00c5387f 兼容armv6指令系统的arm v7么
CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
Machine: SMDK6410
Memory policy: ECC disabled, Data cache writeback
CPU S3C6410 (id 0x36410101)
这是在设置什么
S3C24XX Clocks, (c) 2004 Simtec Electronics
S3C64XX: PLL settings, A=800000000, M=532000000, E=24000000
S3C64XX: HCLKx2=266666666, HCLK=133333333, PCLK=66666666
div1: 00000555
mout_apll: source is fout_apll (1), rate is 800000000
mout_epll: source is fout_epll (1), rate is 24000000
mout_mpll: source is mpll (1), rate is 532000000
mmc_bus: source is dout_mpll (1), rate is 44333333
mmc_bus: source is dout_mpll (1), rate is 44333333
mmc_bus: source is dout_mpll (1), rate is 44333333
usb-host-bus: source is mout_epll (0), rate is 24000000
uclk1: source is dout_mpll (1), rate is 66500000
spi_epll: source is mout_epll (0), rate is 24000000
spi_epll: source is mout_epll (0), rate is 24000000
sclk_audio0: source is mout_epll (0), rate is 24000000
sclk_audio1: source is mout_epll (0), rate is 24000000
sclk_audio2: source is mout_epll (0), rate is 24000000
irda-bus: source is mout_epll (0), rate is 24000000 下面的SDRAM都有内存被保留用
s3c64xx: 10485760 bytes SDRAM reserved for fimc at 0x50751000
s3c64xx: 8388608 bytes SDRAM reserved for pp at 0x51151000
s3c64xx: 8388608 bytes SDRAM reserved for tv at 0x51951000
s3c64xx: 6291456 bytes SDRAM reserved for mfc at 0x52151000
s3c64xx: 4194304 bytes SDRAM reserved for jpeg at 0x52751000
s3c64xx: 1048576 bytes SDRAM reserved for cmm at 0x52b51000
s3c64xx: 19922944 bytes SDRAM reserved for s3c-g3d at 0x52c51000
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
Kernel command line: noinitrd console=ttySAC0 init=/linuxrc ubi.mtd=1 root=ubi0:rootfs rootfstype=ubifs
PID hash table entries: 1024 (order: 10, 4096 bytes)
Console: colour dummy device 80x30
console [ttySAC0] enabled
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 256MB = 256MB total
Memory: 196864KB available (4708K code, 519K data, 144K init)
SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Calibrating delay loop... 797.90 BogoMIPS (lpj=1994752)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
net_namespace: 288 bytes
NET: Registered protocol family 16
S3C6410 Power Management, (c) 2008 Samsung Electronics
S3C6410: Initialising architecture
S3C DMA-pl080 Controller Driver, (c) 2006-2007 Samsung Electronics
Total 32 DMA channels will be initialized.
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
cfg80211: Using static regulatory domain info
cfg80211: Regulatory domain: US
(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
(2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
(5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
(5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
(5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
(5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
(5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
cfg80211: Calling CRDA for country: US
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
NET: Registered protocol family 1
S3C64XX ADC driver, (c) 2008 Samsung Electronics
S5P64XX ADC driver successfully probed
NetWinder Floating Point Emulator V0.97 (double precision)
ashmem: initialized
yaffs Jun 20 2010 13:53:43 Installing.
msgmni has been set to 385
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
S3C_LCD clock got enabled :: 133.333 Mhz LCD的时钟频率。
LCD TYPE :: WX4300F will be initialized 我的LCD显示屏的型号
Window[0] - FB1: map_video_memory: clear ff000000:0007f800
FB1: map_video_memory: dma=5f180000 cpu=ff000000 size=0007f800
Window[0] - FB2: map_video_memory: clear ff03fc00:0003fc00
FB2: map_video_memory: dma=5f1bfc00 cpu=ff03fc00 size=0003fc00
Console: switching to colour frame buffer device 60x34
fb0: s3cfb frame buffer device
Window[1] - FB1: map_video_memory: clear ff080000:0003fc00
FB1: map_video_memory: dma=5f200000 cpu=ff080000 size=0003fc00
Window[1] - FB2: map_video_memory: clear ff09fe00:0001fe00
FB2: map_video_memory: dma=5f21fe00 cpu=ff09fe00 size=0001fe00
fb1: s3cfb frame buffer device
Window[2] - FB1: map_video_memory: clear ff0c0000:0003fc00
FB1: map_video_memory: dma=5f240000 cpu=ff0c0000 size=0003fc00
fb2: s3cfb frame buffer device
Window[3] - FB1: map_video_memory: clear ff100000:0003fc00
FB1: map_video_memory: dma=5f280000 cpu=ff100000 size=0003fc00
fb3: s3cfb frame buffer device
s3c-aes initialized
S3C AES Drvier
Serial: 8250/16550 driver4 ports, IRQ sharing disabled
s3c6400-uart.0: s3c2410_serial0 at MMIO 0x7f005000 (irq = 16) is a S3C6400/10
s3c6400-uart.1: s3c2410_serial1 at MMIO 0x7f005400 (irq = 20) is a S3C6400/10
s3c6400-uart.2: s3c2410_serial2 at MMIO 0x7f005800 (irq = 24) is a S3C6400/10
s3c6400-uart.3: s3c2410_serial3 at MMIO 0x7f005c00 (irq = 28) is a S3C6400/10
brd: module loaded
loop: module loaded
nbd: registered device at major 43
usbcore: registered new interface driver ub
dm9000 Ethernet Driver
eth0: dm9000 at d0894000,d0894004 IRQ 108 MAC: 00:22:12:34:56:90
usbcore: registered new interface driver asix
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver net1080
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
console [netcon0] enabled
netconsole: network logging started
Linux video capture interface: v2.00
s3c-fimc: controller 0 registered successfully
s3c-fimc: controller 1 registered successfully
S3C6400 MFC Driver, (c) 2007 Samsung Electronics
S3C6400 MFC Driver, (c) 2007 Samsung Electronics
S3C PostProcessor Driver v3.12, (c) 2009 Samsung Electronics
S3C6410 TV encoder Driver, (c) 2008 Samsung Electronics
S3C6410 TV encoder Driver init OK.
S3C6410 TV scaler Driver, (c) 2008 Samsung Electronics
S3C6410 TV scaler Driver init OK.
S3C Rotator Driver, (c) 2008 Samsung Electronics
s3c_rotator_probe called
s3c_rotator_probe success
S3C JPEG Driver, (c) 2007 Samsung Electronics
s3c_g2d_probe called
s3c_g2d_probe Success
S3C G2D Init : Done
S3C G3D Driver, (c) 2007-2009 Samsung Electronics
s3c_g3d version : 0x1050000
S3C G3D Init : Done
S3C CMM Driver, (c) 2008 Samsung Electronics
Driver 'sd' needs updating - please use bus_type methods
Driver 'sr' needs updating - please use bus_type methods
S3C NAND Driver, (c) 2008 Samsung Electronics
S3C NAND Driver is using hardware ECC.
NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung NAND 1GiB 3,3V 8-bit)
Creating 2 MTD partitions on "NAND 1GiB 3,3V 8-bit":
0x00400000-0x00800000 : "cramfs"
0x00800000-0x40000000 : "ubifs"
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size: 262144 bytes (256 KiB)
UBI: logical eraseblock size: 258048 bytes
UBI: smallest flash I/O unit: 2048
UBI: VID header offset: 2048 (aligned 2048)
UBI: data offset: 4096
UBI: attached mtd1 to ubi0
UBI: MTD device name: "ubifs"
UBI: MTD device size: 1016 MiB
UBI: number of good PEBs: 4064
UBI: number of bad PEBs: 0
UBI: max. allowed volumes: 128
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 1
UBI: available PEBs: 0
UBI: total number of reserved PEBs: 4064
UBI: number of PEBs reserved for bad PEB handling: 40
UBI: max/mean erase counter: 2/1
UBI: background thread "ubi_bgt0d" started, PID 1030
Samsung SoC SPI Driver loaded for Bus SPI-0 with 2 Slaves attached
Max,Min-Speed [33333333, 130208]Hz
Irq=80 IOmem=[0x7f00bfff-0x7f00b000] DMA=[Rx-33, Tx-34]
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 79, io mem 0x74300000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: S3C24XX OHCI
usb usb1: Manufacturer: Linux 2.6.28.6 ohci_hcd
usb usb1: SerialNumber: s3c24xx
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
s3c-udc : S3C HS USB OTG Device Driver, (c) 2008-2009 Samsung Electronics
s3c-udc : version 15 March 2009 (DMA Mode)
mice: PS/2 mouse device common for all mice
gpio-keys init
input: gpio-keys as /class/input/input0
S3C Touchscreen driver, (c) 2008 Samsung Electronics
S3C TouchScreen got loaded successfully : 12 bits
input: S3C TouchScreen as /class/input/input1
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
s3c2410_rtc: tick irq 34, alarm irq 92
s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling
s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0
i2c /dev entries driver
s3c2440-i2c s3c2440-i2c: slave address 0x10
s3c2440-i2c s3c2440-i2c: bus frequency set to 378 KHz
[OV965X]ov965x_attach_adapter.
parent clock for camera: 266.666 MHz, divisor: 11
s3c2440-i2c s3c2440-i2c: i2c-0: S3C I2C adapter
at24 0-0050: 1024 byte 24c08 EEPROM (writable)
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
s3c-sdhci s3c-sdhci.0: clock source 0: hsmmc (133333333 Hz)
s3c-sdhci s3c-sdhci.0: clock source 1: hsmmc (133333333 Hz)
s3c-sdhci s3c-sdhci.0: clock source 2: mmc_bus (44333333 Hz)
mmc0: SDHCI controller on samsung-hsmmc [s3c-sdhci.0] using ADMA
sdhci: card inserted.
s3c-sdhci s3c-sdhci.1: clock source 0: hsmmc (133333333 Hz)
s3c-sdhci s3c-sdhci.1: clock source 1: hsmmc (133333333 Hz)
s3c-sdhci s3c-sdhci.1: clock source 2: mmc_bus (44333333 Hz)
mmc1: SDHCI controller on samsung-hsmmc [s3c-sdhci.1] using ADMA
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
sdhci: card removed.
Advanced Linux Sound Architecture Driver Version 1.0.18rc3.
ASoC version 0.13.2
smdk6400_init:67
WM9713/WM9714 SoC Audio Codec 0.15 声卡
playback: 1, capture : 1
asoc: AC97 HiFi <-> s3c64xx-ac97 mapping ok
ALSA device list:
#0: SMDK6410 (WM9713)
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
ieee80211: 802.11 data/management/control stack, git-1.1.13
ieee80211: Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>
VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 5
s3c2410-rtc s3c2410-rtc: setting system clock to 2030-10-20 08:11:03 UTC (1918714263)
s3c-nand: 1 bit(s) error detected, corrected successfully
UBIFS: mounted UBI device 0, volume 0, name "rootfs"
UBIFS: file system size: 1034514432 bytes (1010268 KiB, 986 MiB, 4009 LEBs)
UBIFS: journal size: 33546240 bytes (32760 KiB, 31 MiB, 130 LEBs)
UBIFS: media format: 4 (latest is 4)
UBIFS: default compressor: LZO
UBIFS: reserved for root: 5182151 bytes (5060 KiB)
VFS: Mounted root (ubifs filesystem).
Freeing init memory: 144K
Try to bring eth0 interface up......eth0: link down
Done
Starting Qtopia, please waiting... Qtopia图形界面
Please press Enter to activate this console. s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
Warning: could not register server
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
s3c-nand: 1 bit(s) error detected, corrected successfully
QDir::readDirEntries: Cannot read the directory: /usr/lib/ipkg/externinfo
我现在就能从linux的启动信息中，获取以上的知识。 请求关机之后的信息： sh: apm: not found QDir::readDirEntries: Cannot read the directory: /usr/lib/ipkg/externinfo sh: apm: not found QDir::readDirEntries: Cannot read the directory: /usr/lib/ipkg/externinfo sh: apm: not found QDir::readDirEntries: Cannot read the directory: /usr/lib/ipkg/externinfo dd: writing '/dev/fb0': No space left on device 1021+0 records in 1020+0 records out umount: can't remount none read-only umount: none busy - remounted read-only umount: none busy - remounted read-only The system is going down NOW! 关机的时候，要发信号 SIGTERM 和SIGKILL 给所有进程 Sending SIGTERM to all processes Sending SIGKILL to all processes Requesting system halt System halted.
