DM368开发 — 常用指令演示 - 全栈程序员必看

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参看：Hi3516A开发–常用指令和根文件目录详解

模块被加载后，在/sys/module/目录下降出现以此模块名命名的目录
root@dm368-evm:/sys/module# ls
8250 lockd snd_pcm_oss tuner_simple
cmemk mt20xx snd_timer tuner_xc2028
davinci_display mt9p031 soundcore tvp514x
davinci_enc_mngr musb_hdrc spurious usb_storage
davinci_mmc netpoll sunrpc usbcore
davincifb nfs tcp_cubic usbserial
dm365_imp option tda8290 usbtest
dm365mmap printk tda9887 videobuf_core
edmak scsi_mod tea5761 videobuf_vmalloc
irqk snd tea5767 vpfe_capture
kernel snd_pcm ths7303 xc5000
root@dm368-evm:/sys/module#

注意 /sys/class的目录如i2c
root@dm368-evm:/sys/class# ls
bdi edma misc scsi_host
block firmware mmc_host sound
cmem graphics mtd spi_master
davinci_display hwmon net tty
davinci_previewer i2c-adapter ppp ubi
davinci_resizer i2c-dev regulator usb_device
davinci_system irqk rtc video4linux
dm365_aew mdio_bus scsi_device video_output
dm365_af mem scsi_disk

查看模块信息
root@dm368-evm:~# modinfo edmak
filename: /lib/modules/2.6.32.17-davinci1/kernel/drivers/dsp/edmak.ko
description: DMA operations from user mode
author: Texas Instruments
license: GPL
depends:
vermagic: 2.6.32.17-davinci1 preempt mod_unload modversions ARMv5

查看CPU信息：
root@dm368-evm:/proc# cat cpuinfo
Processor : ARM926EJ-S rev 5 (v5l)
BogoMIPS : 147.86
Features : swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant : 0x0
CPU part : 0x926
CPU revision : 5
Hardware : DaVinci DM36x EVM
Revision : 0000
Serial : 0000000000000000

查看内存信息：
root@dm368-evm:/proc# cat /proc/meminfo
MemTotal: 44212 kB
MemFree: 26900 kB
Buffers: 220 kB
Cached: 3840 kB
SwapCached: 0 kB
Active: 3624 kB
Inactive: 1836 kB
Active(anon): 1444 kB
Inactive(anon): 92 kB
Active(file): 2180 kB
Inactive(file): 1744 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 4 kB
Writeback: 0 kB
AnonPages: 1428 kB
Mapped: 1536 kB
Shmem: 136 kB
Slab: 2528 kB
SReclaimable: 636 kB
SUnreclaim: 1892 kB
KernelStack: 360 kB
PageTables: 244 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 22104 kB
Committed_AS: 6268 kB
VmallocTotal: 968704 kB
VmallocUsed: 110828 kB
VmallocChunk: 841724 kB

查看USB设备：
root@dm368-evm:/proc# cat /proc/bus/usb/devices

T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 2.06
S: Manufacturer=Linux 2.6.32.17-davinci1 musb-hcd
S: Product=MUSB HDRC host driver
S: SerialNumber=musb_hdrc
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms

查看键盘和鼠标：
root@dm368-evm:/proc# cat /proc/bus/input/devices
cat: can’t open ‘/proc/bus/input/devices’: No such file or directory

查看各分区使用情况：
root@dm368-evm:/proc# df
Filesystem 1K-blocks Used Available Use% Mounted on
ubi0:rootfs 113424 21208 87380 20% /
tmpfs 40 0 40 0% /mnt/.splash
none 1024 32 992 3% /dev
/dev/mmcblk0p1 61387804 113140 58156328 0% /media/mmcblk0p1
tmpfs 16384 36 16348 0% /var/volatile
tmpfs 22104 0 22104 0% /dev/shm
tmpfs 16384 0 16384 0% /media/ram

查看体系结构：
root@dm368-evm:/proc# busybox uname -a
Linux dm368-evm 2.6.32.17-davinci1 #80 PREEMPT Mon Jul 14 16:05:38 CST 2014 armv5tejl unknown

查看中断信息：
root@dm368-evm:/proc# cat /proc/interrupts
CPU0
3: 0 AINTC dm365_h3a_af
6: 0 AINTC dm365_h3a_aew
8: 17004 AINTC davinci_osd
12: 1 AINTC musb_hdrc
16: 0 AINTC edma
17: 0 AINTC edma_error
23: 0 AINTC sdio0
26: 953 AINTC mmc0
32: 13148 AINTC clockevent
33: 1 AINTC free-run counter
39: 89 AINTC i2c_davinci
40: 639 AINTC serial
52: 0 AINTC eth0
53: 393 AINTC eth0
54: 0 AINTC eth0
55: 0 AINTC eth0
Err: 0

查看uboot环境配置：
root@dm368-evm:/proc# cat cmdline
dm365_imp.oper_mode=0 mem=48M console=ttyS0,115200n8 noinitrd rw ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs video=davincifb:osd0=720x576x16,4050K vpfe_capture.cont_bufsize=6291456 davinci_capture.device_type=1 vpfe_capture.interface=1

所支持文件系统：
root@dm368-evm:/proc# cat filesystems
nodev sysfs
nodev rootfs
nodev bdev
nodev proc
nodev tmpfs
nodev debugfs
nodev sockfs
nodev usbfs
nodev pipefs
nodev anon_inodefs
nodev rpc_pipefs
nodev inotifyfs
nodev devpts
ext3
ext2
cramfs
nodev ramfs
vfat
msdos
nodev nfs
nodev mqueue
nodev ubifs

加载模块
root@dm368-evm:/proc# cat modules
dm365mmap 1955 0 – Live 0xbf01c000
edmak 12667 0 – Live 0xbf013000
irqk 6491 0 – Live 0xbf00c000
cmemk 22319 0 – Live 0xbf000000

加载的文件系统
root@dm368-evm:/proc# cat mounts
rootfs / rootfs rw 0 0
ubi0:rootfs / ubifs rw,relatime 0 0
proc /proc proc rw,relatime 0 0
tmpfs /mnt/.splash tmpfs rw,relatime,size=40k 0 0
sysfs /sys sysfs rw,relatime 0 0
none /dev tmpfs rw,relatime,size=1024k,nr_inodes=8192,mode=755 0 0
/dev/mmcblk0p1 /media/mmcblk0p1 ext3 rw,relatime,errors=continue,data=writeback 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
usbfs /proc/bus/usb usbfs rw,relatime 0 0
tmpfs /var/volatile tmpfs rw,relatime,size=16384k 0 0
tmpfs /dev/shm tmpfs rw,relatime,mode=777 0 0
tmpfs /media/ram tmpfs rw,relatime,size=16384k 0 0

系统分区：
root@dm368-evm:/proc# cat mtd
dev: size erasesize name
mtd0: 003c0000 00020000 “bootloader”
mtd1: 00040000 00020000 “params”
mtd2: 00420000 00020000 “kernel”
mtd3: 08000000 00020000 “filesystem”
mtd4: 177e0000 00020000 “zslf”

printk打印机别：
root@dm368-evm:/proc/sys/kernel# cat printk
7 4 1 7

内核版本：
root@dm368-evm:/proc# cat version
Linux version 2.6.32.17-davinci1 (root@zslf-desktop) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #80 PREEMPT Mon Jul 14 16:05:38 CST 2014

系统运行时间：
root@dm368-evm:/proc# cat uptime
1593.79 1224.34

Linux内核引导时，从文件/etc/fstab中读取要加载的文件系统
root@dm368-evm:/etc# cat fstab
# stock fstab – you probably want to override this with a machine specific one

rootfs / auto defaults 1 1
proc /proc proc defaults 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
usbfs /proc/bus/usb usbfs defaults 0 0
tmpfs /var/volatile tmpfs defaults,size=16M 0 0
tmpfs /dev/shm tmpfs mode=0777 0 0
tmpfs /media/ram tmpfs defaults,size=16M 0 0

# uncomment this if your device has a SD/MMC/Transflash slot

#/dev/mmcblk0p1 /media/card auto defaults,sync,noauto 0 0

查看开发板主频

第一种：

可以看内核启动信息

U-Boot 2010.12-rc2 (May 06 2014 – 09:23:56)

Cores: ARM 297 MHz

DDR: 243 MHz

I2C: ready

DRAM: 128 MiB

NAND: 512 MiB

MMC: davinci: 0, davinci: 1

Bad block table found at page 262080, version 0x01

Bad block table found at page 262016, version 0x01

Net: Ethernet PHY: LXT972 @ 0x01

DaVinci-EMAC

Hit any key to stop autoboot: 0

第二种：

执行 cat /proc/davinci_clocks

查看 arm_clk 的值

root@dm368-evm:/proc# cat davinci_clocks
ref_clk users=16 24000000 Hz
pll1 users=15 pll 486000000 Hz
pll1_aux_clk users= 5 pll 24000000 Hz
uart0 users= 1 psc 24000000 Hz
i2c users= 1 psc 24000000 Hz
spi4 users= 0 psc 24000000 Hz
pwm0 users= 0 psc 24000000 Hz
pwm1 users= 0 psc 24000000 Hz
pwm2 users= 0 psc 24000000 Hz
timer0 users= 1 psc 24000000 Hz
timer1 users= 0 psc 24000000 Hz
timer2 users= 2 psc 24000000 Hz
timer3 users= 0 psc 24000000 Hz
usb users= 1 psc 24000000 Hz
pll1_sysclkbp users= 0 pll 24000000 Hz
clkout0 users= 0 pll 24000000 Hz
pll1_sysclk1 users= 0 pll 24300000 Hz
pll1_sysclk2 users= 0 pll 243000000 Hz
pll1_sysclk3 users= 2 pll 243000000 Hz
vpss_dac users= 1 psc 243000000 Hz
mjcp users= 1 psc 243000000 Hz
pll1_sysclk4 users= 6 pll 121500000 Hz
uart1 users= 1 psc 121500000 Hz
mmcsd1 users= 0 psc 121500000 Hz
spi0 users= 0 psc 121500000 Hz
spi1 users= 0 psc 121500000 Hz
spi2 users= 0 psc 121500000 Hz
spi3 users= 0 psc 121500000 Hz
gpio users= 1 psc 121500000 Hz
aemif users= 2 psc 121500000 Hz
emac users= 1 psc 121500000 Hz
asp0 users= 1 psc 121500000 Hz
rto users= 0 psc 121500000 Hz
pll1_sysclk5 users= 1 pll 243000000 Hz
vpss_master users= 1 psc 243000000 Hz
pll1_sysclk6 users= 0 pll 27000000 Hz
pll1_sysclk7 users= 0 pll 486000000 Hz
pll1_sysclk8 users= 1 pll 97200000 Hz
mmcsd0 users= 1 psc 97200000 Hz
pll1_sysclk9 users= 0 pll 243000000 Hz
pll2 users= 1 pll 594000000 Hz
pll2_aux_clk users= 0 pll 24000000 Hz
clkout1 users= 0 pll 24000000 Hz
pll2_sysclk1 users= 0 pll 23760000 Hz
pll2_sysclk2 users= 1 pll 297000000 Hz
arm_clk users= 1 psc 297000000 Hz
pll2_sysclk3 users= 0 pll 297000000 Hz
pll2_sysclk4 users= 0 pll 20482758 Hz
voice_codec users= 0 psc 20482758 Hz
pll2_sysclk5 users= 0 pll 74250000 Hz
pll2_sysclk6 users= 0 pll 594000000 Hz
pll2_sysclk7 users= 0 pll 594000000 Hz
pll2_sysclk8 users= 0 pll 594000000 Hz
pll2_sysclk9 users= 0 pll 594000000 Hz
pwm3 users= 0 psc 24000000 Hz