注1：学习一个开发板的目的，就是像一个产品经理那样，不断添加新的功能，看怎么把它的cpu用到100%，榨干它的性能。
注2:有一个百问网100ask的imx6ull开发板的wiki,链接[:](百问网imx6ull开发板 - Ubuntu中文)
硬件
//CPU
//百问开发板：
uboot
uboot支持的命令
=> help
? - alias for 'help'
base - print or set address offset
bdinfo - print Board Info structure
bmode - sd1|sd2|qspi1|normal|usb|sata|ecspi1:0|ecspi1:1|ecspi1:2|ecspi1:3|esdhc1|esdhc2|esdhc3|esdhc4 [noreset]
bmp - manipulate BMP image data
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootefi - Boots an EFI payload from memory
bootelf - Boot from an ELF image in memory
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootvx - Boot vxWorks from an ELF image
bootz - boot Linux zImage image from memory
clocks - display clocks
clrlogo - fill the boot logo area with black
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
dcache - enable or disable data cache
dhcp - boot image via network using DHCP/TFTP protocol
dm - Driver model low level access
echo - echo args to console
editenv - edit environment variable
env - environment handling commands
erase - erase FLASH memory
exit - exit script
ext2load- load binary file from a Ext2 filesystem
ext2ls - list files in a directory (default /)
ext4load- load binary file from a Ext4 filesystem
ext4ls - list files in a directory (default /)
ext4size- determine a file's size
ext4write- create a file in the root directory
false - do nothing, unsuccessfully
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
fatsize - determine a file's size
fdt - flattened device tree utility commands
flinfo - print FLASH memory information
fstype - Look up a filesystem type
fuse - Fuse sub-system
go - start application at address 'addr'
gpio - query and control gpio pins
help - print command description/usage
i2c - I2C sub-system
icache - enable or disable instruction cache
iminfo - print header information for application image
imxtract- extract a part of a multi-image
itest - return true/false on integer compare
load - load binary file from a filesystem
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loadx - load binary file over serial line (xmodem mode)
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
ls - list files in a directory (default /)
md - memory display
mdio - MDIO utility commands
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mmc - MMC sub system
mmcinfo - display MMC info
mtest - simple RAM read/write test
mw - memory write (fill)
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
protect - enable or disable FLASH write protection
reset - Perform RESET of the CPU
run - run commands in an environment variable
save - save file to a filesystem
saveenv - save environment variables to persistent storage
setenv - set environment variables
setexpr - set environment variable as the result of eval expression
sf - SPI flash sub-system
showvar - print local hushshell variables
size - determine a file's size
sleep - delay execution for some time
source - run script from memory
test - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
true - do nothing, successfully
usb - USB sub-system
usbboot - boot from USB device
version - print monitor, compiler and linker version
=>
uboot环境变量
baudrate=115200
board_name=EVK
board_rev=14X14
boot_fdt=try
bootcmd=run updateset;run findfdt;run findtee;mmc dev ${mmcdev};mmc dev ${mmcdev}; if mmc rescan; then if run loadbootscript; then run bootscript; else if run loadimage; then run mmcboot; else run netboot; fi; fi; else run netboot; fi
bootcmd_mfg=run mfgtool_args; if test ${tee} = yes; then bootm ${tee_addr} ${initrd_addr} ${fdt_addr}; else bootz ${loadaddr} ${initrd_addr} ${fdt_addr}; fi;
bootdelay=3
bootdir=/boot
bootscript=echo Running bootscript from mmc ...; source
console=ttymxc0
eth1addr=00:01:3f:2d:3e:4d
ethaddr=00:01:1f:2d:3e:4d
ethprime=eth1
fdt_addr=0x83000000
fdt_file=100ask_imx6ull-14x14.dtb
fdt_high=0xffffffff
fdtcontroladdr=9ef40478
findfdt=if test $fdt_file = undefined; then if test $board_name = EVK && test $board_rev = 9X9; then setenv fdt_file imx6ull-9x9-evk.dtb; fi; if test $board_name = EVK && test $board_rev = 14X14; then setenv fdt_file imx6ull-14x14-evk.dtb; fi; if test $fdt_file = undefined; then setenv fdt_file imx6ull-14x14-alpha.dtb; fi; fi;
image=zImage
initrd_addr=0x83800000
initrd_high=0xffffffff
ip_dyn=yes
loadaddr=0x80800000
loadbootscript=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};
loadfdt=ext2load mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${bootdir}/${fdt_file}
loadimage=ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${bootdir}/${image}
loadtee=fatload mmc ${mmcdev}:${mmcpart} ${tee_addr} ${tee_file}
mfgtool_args=setenv bootargs console=${console},${baudrate} rdinit=/linuxrc g_mass_storage.stall=0 g_mass_storage.removable=1 g_mass_storage.file=/fat g_mass_storage.ro=1 g_mass_storage.idVendor=0x066F g_mass_storage.idProduct=0x37FF g_mass_storage.iSerialNumber="" clk_ignore_unused
mmcargs=setenv bootargs console=${console},${baudrate} root=${mmcroot}
mmcautodetect=no
mmcboot=echo Booting from mmc ...; run mmcargs; if test ${tee} = yes; then run loadfdt; run loadtee; bootm ${tee_addr} - ${fdt_addr}; else if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdt_addr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi; fi;
mmcdev=1
mmcpart=2
mmcroot=/dev/mmcblk1p2 rootwait rw
netargs=setenv bootargs console=${console},${baudrate} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp
netboot=echo Booting from net ...; run netargs; setenv get_cmd tftp; ${get_cmd} ${image}; ${get_cmd} ${fdt_addr} ${fdt_file}; bootz ${loadaddr} - ${fdt_addr};
panel=TFT7016
script=boot.scr
tee=no
tee_addr=0x84000000
tee_file=uTee-6ullevk
update=yes
updateset=if test $update = undefined; then setenv update yes; saveenv; fi;
Environment size: 2738/8188 bytes
=>
I2C
=> i2c bus 0
Bus 0: i2c@021a0000 (active 0)
=> i2c bus 1
Bus 1: i2c@021a4000 (active 1)
SPI接口flash
=> sf probe
SF: unrecognized JEDEC id bytes: ff, ff, ff
Failed to initialize SPI flash at 0:0 (error -2)
网卡相关
=> mii info
NULL device name!
No such device: <NULL>
NULL device name!
No such device: <NULL>
mmc相关
=> mmc list
FSL_SDHC: 0 (SD)
FSL_SDHC: 1 (eMMC)
=> mmc dev 0 //选中0 = SD卡
switch to partitions #0, OK
mmc0 is current device
=> mmc info //SD卡信息
Device: FSL_SDHC
Manufacturer ID: 9f
OEM: 5449
Name: SD32G
Bus Speed: 50000000
Mode : SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 29.1 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
=> mmc part //SD卡分区
Partition Map for MMC device 0 -- Partition Type: DOS
Part Start Sector Num Sectors UUID Type
1 1024 20480 4bab40be-01 0c
2 21504 8388608 4bab40be-02 83
=> mmc dev 1 //选中1 = MMC
switch to partitions #0, OK
mmc1(part 0) is current device
=> mmc info //MMC的信息
Device: FSL_SDHC
Manufacturer ID: 13
OEM: 14e
Name: Q2J54
Bus Speed: 52000000
Mode : MMC High Speed (52MHz)
Rd Block Len: 512
MMC version 5.0
High Capacity: Yes
Capacity: 3.6 GiB
Bus Width: 4-bit
Erase Group Size: 512 KiB
HC WP Group Size: 8 MiB
User Capacity: 3.6 GiB WRREL
Boot Capacity: 2 MiB ENH
RPMB Capacity: 512 KiB ENH
=> mmc part //MMC的分区
Partition Map for MMC device 1 -- Partition Type: DOS
Part Start Sector Num Sectors UUID Type
1 20480 102400 00000000-01 0c
2 122880 4194304 00000000-02 83
=>
linux下常用命令
7zip基准跑分
[root@imx6ull:~]# ./7zzs b
7-Zip (z) 21.07 (armt) : Copyright (c) 1999-2021 Igor Pavlov : 2021-12-26
32-bit arm_v:7 thumb:2 locale=C UTF8=- Threads:1
Compiler: 9.2.1 20191025 GCC 9.2.1
Linux : 4.9.88 : #1 SMP PREEMPT Wed Apr 22 15:53:26 CST 2020 : armv7l
PageSize:4KB hwcap:1FB0D6:NEON hwcap2:0
LE
1T CPU Freq (MHz): 714 782 783 782 781 780 783
RAM size: 491 MB, # CPU hardware threads: 1
RAM usage: 437 MB, # Benchmark threads: 1
Compressing | Decompressing
Dict Speed Usage R/U Rating | Speed Usage R/U Rating
KiB/s % MIPS MIPS | KiB/s % MIPS MIPS
22: 458 100 448 446 | 7638 100 654 652
23: 431 100 441 439 | 7520 100 653 651
24: 413 100 446 444 | 7396 100 652 649
[ 1363.145269] 7zzs invoked oom-killer: gfp_mask=0x26080c2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOTRACK), nodemask=0, order=0, oom_score_adj=0
...//crash 了，上面跑分可以参考对比
内核配置 zcat /proc/config.gz
[root@imx6ull:~]# zcat /proc/config.gz
#
# Automatically generated file; DO NOT EDIT.
# Linux/arm 4.9.88 Kernel Configuration
#
CONFIG_ARM=y
CONFIG_ARM_HAS_SG_CHAIN=y
CONFIG_MIGHT_HAVE_PCI=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
.......
# CONFIG_VHOST_NET is not set
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
[root@imx6ull:~]#
busybox 支持的命令
[root@imx6ull:~]# busybox --help
BusyBox v1.29.3 (2020-04-22 14:57:46 CST) multi-call binary.
BusyBox is copyrighted by many authors between 1998-2015.
Licensed under GPLv2. See source distribution for detailed
copyright notices.
Usage: busybox [function [arguments]...]
or: busybox --list[-full]
or: busybox --install [-s] [DIR]
or: function [arguments]...
BusyBox is a multi-call binary that combines many common Unix
utilities into a single executable. Most people will create a
link to busybox for each function they wish to use and BusyBox
will act like whatever it was invoked as.
Currently defined functions:
[, [[, addgroup, adduser, ar, arch, arp, arping, ash, awk, basename, blkid, bunzip2, bzcat, cat, chattr, chgrp, chmod, chown, chroot, chrt, chvt, cksum, clear, cmp, cp,
cpio, crond, crontab, cut, date, dc, dd, deallocvt, delgroup, deluser, depmod, devmem, df, diff, dirname, dmesg, dnsd, dnsdomainname, dos2unix, du, dumpkmap, echo, egrep,
eject, env, ether-wake, expr, factor, fallocate, false, fbset, fdflush, fdformat, fdisk, fgrep, find, flock, fold, free, freeramdisk, fsck, fsfreeze, fstrim, fuser, getopt,
getty, grep, gunzip, gzip, halt, hdparm, head, hexdump, hexedit, hostid, hostname, hwclock, i2cdetect, i2cdump, i2cget, i2cset, id, ifconfig, ifdown, ifup, inetd, init,
insmod, install, ip, ipaddr, ipcrm, ipcs, iplink, ipneigh, iproute, iprule, iptunnel, kill, killall, killall5, klogd, last, less, link, linux32, linux64, linuxrc, ln,
loadfont, loadkmap, logger, login, logname, losetup, ls, lsattr, lsmod, lsof, lspci, lsscsi, lsusb, lzcat, lzma, lzopcat, makedevs, md5sum, mdev, mesg, microcom, mkdir,
mkdosfs, mke2fs, mkfifo, mknod, mkpasswd, mkswap, mktemp, modinfo, modprobe, more, mount, mountpoint, mt, mv, nameif, netstat, nice, nl, nohup, nproc, nslookup, nuke, od,
openvt, partprobe, passwd, paste, patch, pidof, ping, pipe_progress, pivot_root, poweroff, printenv, printf, ps, pwd, rdate, readlink, readprofile, realpath, reboot, renice,
reset, resize, resume, rm, rmdir, rmmod, route, run-init, run-parts, runlevel, sed, seq, setarch, setconsole, setfattr, setkeycodes, setlogcons, setpriv, setserial, setsid,
sh, sha1sum, sha256sum, sha3sum, sha512sum, shred, sleep, sort, start-stop-daemon, strings, stty, su, sulogin, svc, svok, swapoff, swapon, switch_root, sync, sysctl,
syslogd, tail, tar, tc, tee, telnet, test, tftp, time, top, touch, tr, traceroute, true, truncate, tty, ubirename, udhcpc, uevent, umount, uname, uniq, unix2dos, unlink,
unlzma, unlzop, unxz, unzip, uptime, usleep, uudecode, uuencode, vconfig, vi, vlock, w, watch, watchdog, wc, wget, which, who, whoami, xargs, xxd, xz, xzcat, yes, zcat
[root@imx6ull:~]#
[root@imx6ull:~]#
busybox下读取设备树的节点值的方法
[root@imx6ull:/proc/device-tree]# hexdump ./memory/reg
0000000 0080 0000 0020 0000
0000008
[root@imx6ull:/sys]# lsmod
Module Size Used by
inv_mpu6050_spi 2052 0
inv_mpu6050 10948 2 inv_mpu6050_spi
evbug 2078 0
100ask_adxl345_spi 3963 0
100ask_spidev 9333 0
100ask_irda 3442 0
100ask_rc_nec 1146 0
100ask_dht11 3948 0
100ask_ds18b20 4174 0
8723bu 1823356 0
[root@imx6ull:/sys]#
[root@imx6ull:/proc]# uname -a
Linux imx6ull 4.9.88 #1 SMP PREEMPT Wed Apr 22 15:53:26 CST 2020 armv7l GNU/Linux
[root@imx6ull:/proc]# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 1.9G 433.6M 1.4G 23% /
devtmpfs 85.3M 0 85.3M 0% /dev
tmpfs 245.8M 0 245.8M 0% /dev/shm
tmpfs 245.8M 1.6M 244.2M 1% /tmp
tmpfs 245.8M 168.0K 245.6M 0% /run
[root@imx6ull:/proc]# fdisk -l （插32G sdcard）
Disk /dev/mmcblk0: 29 GB, 31267487744 bytes, 61069312 sectors //32GB的SD卡信息
954208 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Device Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
/dev/mmcblk0p1 0,16,17 1,86,21 1024 21503 20480 10.0M c Win95 FAT32 (LBA)
/dev/mmcblk0p2 1,86,22 523,128,53 21504 8410111 8388608 4096M 83 Linux
Disk /dev/mmcblk1: 3728 MB, 3909091328 bytes, 7634944 sectors //4GB的mmc信息
119296 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Device Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
/dev/mmcblk1p1 1,70,6 7,165,30 20480 122879 102400 50.0M c Win95 FAT32 (LBA)
/dev/mmcblk1p2 7,165,31 268,186,46 122880 4317183 4194304 2048M 83 Linux
Disk /dev/mmcblk1boot1: 2 MB, 2097152 bytes, 4096 sectors //mmcblk1boot1 分区信息
64 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Disk /dev/mmcblk1boot1 doesn't contain a valid partition table
Disk /dev/mmcblk1boot0: 2 MB, 2097152 bytes, 4096 sectors //mmcblk1boot0 分区信息
64 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Disk /dev/mmcblk1boot0 doesn't contain a valid partition table
[root@imx6ull:/proc]# fdisk -l （插8G sdcard）
[root@100ask:~]# fdisk -l
Disk /dev/mmcblk0: 7388 MB, 7746879488 bytes, 15130624 sectors #8G 的sdcard
236416 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Device Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
/dev/mmcblk0p1 * 0,65,4 127,187,62 4098 2052097 2048000 1000M 83 Linux
/dev/mmcblk0p2 * 127,187,63 318,244,56 2052098 5124097 3072000 1500M 83 Linux
/dev/mmcblk0p3 318,244,57 382,178,54 5124098 6148097 1024000 500M c Win95 FAT32 (LBA)
Disk /dev/mmcblk1: 3728 MB, 3909091328 bytes, 7634944 sectors //4GB的mmc信息
119296 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Device Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
/dev/mmcblk1p1 * 0,65,4 127,187,62 4098 2052097 2048000 1000M 83 Linux
/dev/mmcblk1p2 * 127,187,63 318,244,56 2052098 5124097 3072000 1500M 83 Linux
/dev/mmcblk1p3 318,244,57 382,178,54 5124098 6148097 1024000 500M c Win95 FAT32 (LBA)
Disk /dev/mmcblk1boot1: 2 MB, 2097152 bytes, 4096 sectors
64 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Disk /dev/mmcblk1boot1 doesn't contain a valid partition table
Disk /dev/mmcblk1boot0: 2 MB, 2097152 bytes, 4096 sectors
64 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Disk /dev/mmcblk1boot0 doesn't contain a valid partition table
[root@imx6ull:~]# lsblk //默认mmc中的linux系统不支持
-sh: lsblk: command not found
ps -ef
PID USER COMMAND
1 root init [3]
2 root [kthreadd]
3 root [ksoftirqd/0]
5 root [kworker/0:0H]
7 root [rcu_preempt]
8 root [rcu_sched]
9 root [rcu_bh]
10 root [migration/0]
11 root [lru-add-drain]
12 root [cpuhp/0]
13 root [kdevtmpfs]
14 root [oom_reaper]
15 root [writeback]
16 root [kcompactd0]
17 root [crypto]
18 root [bioset]
19 root [kblockd]
20 root [kworker/0:1]
21 root [ata_sff]
22 root [cfg80211]
23 root [watchdogd]
24 root [rpciod]
25 root [xprtiod]
26 root [kswapd0]
27 root [vmstat]
28 root [nfsiod]
74 root [bioset]
75 root [bioset]
76 root [bioset]
77 root [bioset]
78 root [bioset]
79 root [bioset]
80 root [bioset]
81 root [bioset]
82 root [bioset]
83 root [bioset]
84 root [bioset]
85 root [bioset]
86 root [bioset]
87 root [bioset]
88 root [bioset]
89 root [bioset]
90 root [bioset]
91 root [bioset]
92 root [bioset]
93 root [bioset]
94 root [bioset]
95 root [bioset]
96 root [bioset]
97 root [bioset]
98 root [spi32766]
99 root [spi0]
100 root [spi2]
101 root [kworker/u2:1]
104 root [ci_otg]
106 root [kworker/u3:0]
107 root [hci0]
108 root [hci0]
110 root [cfinteractive]
111 root [kworker/u3:2]
112 root [irq/64-mmc0]
113 root [irq/98-2190000.]
114 root [irq/65-mmc1]
115 root [mxs_dcp_chan/sh]
116 root [mxs_dcp_chan/ae]
121 root [bioset]
123 root [mmcqd/0]
124 root [bioset]
125 root [mmcqd/1]
126 root [bioset]
127 root [mmcqd/1boot0]
128 root [bioset]
129 root [mmcqd/1boot1]
130 root [bioset]
131 root [mmcqd/1rpmb]
132 root [kworker/u2:2]
133 root [ipv6_addrconf]
134 root [krfcommd]
135 root [pxp_dispatch]
136 root [irq/44-imx_ther]
137 root [kworker/0:1H]
138 root [jbd2/mmcblk0p2-]
139 root [ext4-rsv-conver]
173 root /sbin/syslogd -m 0
176 root /sbin/klogd
187 root /usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session
188 root /home/myir/mxbackend
189 root /home/myir/mxapp --platform linuxfb
202 root /sbin/udevd -d
234 dbus dbus-daemon --system
265 root /usr/sbin/connmand -n
269 root /usr/sbin/ofonod -n
284 root /usr/sbin/ntpd -g
288 root /usr/sbin/wpa_supplicant -u
294 root nginx: master process /usr/sbin/nginx
295 www-data nginx: worker process
299 root /usr/sbin/sshd
311 root smbd -D
314 root {smbd-notifyd} smbd -D
315 root {cleanupd} smbd -D
316 root {lpqd} smbd -D
317 root nmbd -D
322 root -sh
342 root [kworker/0:0]
343 root [kworker/0:2]
349 root ps -ef
[root@imx6ull:/sys/devices/virtual/thermal]#
top命令
[root@100ask:~]# top
Mem: 162040K used, 338908K free, 612K shrd, 5092K buff, 40712K cached
CPU: 0% usr 16% sys 0% nic 83% idle 0% io 0% irq 0% sirq
Load average: 0.17 0.20 0.09 1/125 355
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
355 325 root R 3460 1% 12% top
228 1 root S 53332 11% 4% /usr/share/100ask_desktop/100ask_lvgl_Main
286 1 root S< 98948 20% 0% /usr/bin/pulseaudio --system --daemonize --disallow-module-loading --disallow-exit --exit-idle-time=-1 --use-pid-file --disable-shm
266 1 root S 53100 11% 0% /usr/sbin/NetworkManager
323 1 root S 46864 9% 0% /usr/bin/swupdate -f /etc/swupdate/swupdate.cfg -L -e rootfs,rootfs-1 -u -c 1 -i BrImx6ullpro_01-51fa0c600
258 1 root S 41708 8% 0% /usr/sbin/ModemManager
327 323 root S 20360 4% 0% /usr/bin/swupdate -f /etc/swupdate/swupdate.cfg -L -e rootfs,rootfs-1 -u -c 1 -i BrImx6ullpro_01-51fa0c600
296 286 root S 20028 4% 0% /usr/libexec/pulse/gsettings-helper
178 1 root S 12036 2% 0% /sbin/udevd -d
275 1 root S 7900 2% 0% /usr/sbin/ntpd -g
293 1 root S 7536 2% 0% /usr/sbin/wpa_supplicant -u
304 1 root S 6364 1% 0% /usr/sbin/sshd
280 1 mosquitt S 5412 1% 0% /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf
217 1 dbus S 3616 1% 0% dbus-daemon --system
1 0 root S 3460 1% 0% init
156 1 root S 3460 1% 0% /sbin/syslogd -n
160 1 root S 3460 1% 0% /sbin/klogd -n
309 1 root S 3460 1% 0% /usr/sbin/telnetd -F
325 1 root S 3388 1% 0% -bash
224 1 root S 3384 1% 0% /usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session
336 1 root S 3384 1% 0% /usr/bin/dbus-daemon --syslog --fork --print-pid 4 --print-address 6 --session
320 1 root S 1724 0% 0% /usr/bin/swupdate-progress -w -r
125 2 root SW 0 0% 0% [mmcqd/1]
290 2 root SW 0 0% 0% [RTW_CMD_THREAD]
105 2 root SW 0 0% 0% [kworker/0:2]
20 2 root SW 0 0% 0% [kworker/0:1]
7 2 root SW 0 0% 0% [rcu_preempt]
3 2 root SW 0 0% 0% [ksoftirqd/0]
138 2 root SW 0 0% 0% [jbd2/mmcblk1p2-]
127 2 root SW 0 0% 0% [mmcqd/1boot0]
137 2 root SW< 0 0% 0% [kworker/0:1H]
106 2 root SW< 0 0% 0% [kworker/u3:0]
123 2 root SW 0 0% 0% [mmcqd/0]
129 2 root SW 0 0% 0% [mmcqd/1boot1]
6 2 root SW 0 0% 0% [kworker/u2:0]
13 2 root SW 0 0% 0% [kdevtmpfs]
338 2 root SW 0 0% 0% [kworker/u2:4]
2 0 root SW 0 0% 0% [kthreadd]
111 2 root SW< 0 0% 0% [kworker/u3:2]
4 2 root SW 0 0% 0% [kworker/0:0]
5 2 root SW< 0 0% 0% [kworker/0:0H]
8 2 root SW 0 0% 0% [rcu_sched]
9 2 root SW 0 0% 0% [rcu_bh]
10 2 root SW 0 0% 0% [migration/0]
11 2 root SW< 0 0% 0% [lru-add-drain]
12 2 root SW 0 0% 0% [cpuhp/0]
14 2 root SW 0 0% 0% [oom_reaper]
15 2 root SW< 0 0% 0% [writeback]
[root@100ask:~]#
i2c的拓扑结构
查询几个i2c的bus [root@imx6ull:~]# i2cdetect -l
i2c-1 i2c 21a4000.i2c I2C adapter
i2c-0 i2c 21a0000.i2c I2C adapter
每个bus下挂几个外设.
[root@imx6ull:~]# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1e --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
其中： fxls8471@1e 是 3-Axis, Linear Accelerometer mag3110@0e 飞思卡尔磁力计MAG3110 （没有检测到？？）
[root@imx6ull:~]# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- UU -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- UU -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
其中： wm8960@1a 是 codec sii902x@39 是hdmi-transmitter ov5640@3c (设备树文件有，没有检测到？) 0x60 设备树文件没有，是什么设备？
可以查询i2c设备的寄存器，比如bus=0的0x1e设备：
[root@imx6ull:~]# i2cdump -f -y 0 0x1e
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 02 02 01 ee ee 00 00 00 00 00 00 00 00 ...?????........
10: 00 01 00 03 ee ee ee ee ee 40 00 00 ff ff ee ee .?.??????@....??
20: 05 13 01 00 00 ee ee ee 00 00 00 80 00 80 ee ee ???..???...?.???
30: 00 00 ee 05 ee 00 ee 1b 00 00 00 00 00 00 00 00 ..???.??........
40: 84 86 81 87 81 80 82 b1 ee ee ee ee ee ee ee ee ????????????????
50: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
60: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
70: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
80: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
90: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
a0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
b0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
c0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
d0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
e0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
f0: ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ????????????????
文件系统
[root@imx6ull:/dev]# ls -al /dev
[root@imx6ull:/dev]# ls -al
total 1
drwxr-xr-x 12 root root 3400 Jan 1 00:00 .
drwxr-xr-x 24 root root 1024 Jan 1 00:00 ..
crw------- 1 root root 241, 0 Jan 1 00:00 adxl345
crw------- 1 root root 10, 235 Jan 1 00:00 autofs
drwxr-xr-x 2 root root 720 Jan 1 00:00 block
drwxr-xr-x 3 root root 60 Jan 1 00:00 bus
drwxr-xr-x 2 root root 2660 Jan 1 00:00 char
crw------- 1 root root 5, 1 Jan 1 00:00 console
crw------- 1 root root 10, 62 Jan 1 00:00 cpu_dma_latency
crw------- 1 root root 244, 0 Jan 1 00:00 dht11
drwxr-xr-x 5 root root 100 Jan 1 00:00 disk
drwxr-xr-x 3 root root 80 Jan 1 00:00 dri
crw------- 1 root root 245, 0 Jan 1 00:00 ds18b20
crw-rw---- 1 root video 29, 0 Jan 1 00:00 fb0
crw-rw---- 1 root video 29, 1 Jan 1 00:00 fb1
lrwxrwxrwx 1 root root 13 Jan 1 00:00 fd -> /proc/self/fd
crw-rw-rw- 1 root root 1, 7 Jan 1 00:00 full
crw-rw-rw- 1 root root 10, 229 Jan 1 00:00 fuse
crw------- 1 root root 254, 0 Jan 1 00:00 gpiochip0
crw------- 1 root root 254, 1 Jan 1 00:00 gpiochip1
crw------- 1 root root 254, 2 Jan 1 00:00 gpiochip2
crw------- 1 root root 254, 3 Jan 1 00:00 gpiochip3
crw------- 1 root root 254, 4 Jan 1 00:00 gpiochip4
crw------- 1 root root 254, 5 Jan 1 00:00 gpiochip5
crw------- 1 root root 10, 183 Jan 1 00:00 hwrng
crw------- 1 root root 89, 0 Jan 1 00:00 i2c-0
crw------- 1 root root 89, 1 Jan 1 00:00 i2c-1
crw------- 1 root root 250, 0 Jan 1 00:00 iio:device0
crw------- 1 root root 250, 1 Jan 1 00:00 iio:device1
drwxr-xr-x 3 root root 120 Jan 1 00:00 input
crw------- 1 root root 243, 0 Jan 1 00:00 irda
crw-r--r-- 1 root root 1, 11 Jan 1 00:00 kmsg
srw-rw-rw- 1 root root 0 Jan 1 00:00 log
crw-rw---- 1 root disk 10, 237 Jan 1 00:00 loop-control
brw-rw---- 1 root disk 7, 0 Jan 1 00:00 loop0
brw-rw---- 1 root disk 7, 1 Jan 1 00:00 loop1
brw-rw---- 1 root disk 7, 2 Jan 1 00:00 loop2
brw-rw---- 1 root disk 7, 3 Jan 1 00:00 loop3
brw-rw---- 1 root disk 7, 4 Jan 1 00:00 loop4
brw-rw---- 1 root disk 7, 5 Jan 1 00:00 loop5
brw-rw---- 1 root disk 7, 6 Jan 1 00:00 loop6
brw-rw---- 1 root disk 7, 7 Jan 1 00:00 loop7
crw-r----- 1 root kmem 1, 1 Jan 1 00:00 mem
crw------- 1 root root 10, 59 Jan 1 00:00 memory_bandwidth
brw-rw---- 1 root disk 179, 0 Jan 1 00:00 mmcblk0
brw-rw---- 1 root disk 179, 1 Jan 1 00:00 mmcblk0p1
brw-rw---- 1 root disk 179, 2 Jan 1 00:00 mmcblk0p2
brw-rw---- 1 root disk 179, 3 Jan 1 00:00 mmcblk0p3
brw-rw---- 1 root disk 179, 8 Jan 1 00:00 mmcblk1
brw-rw---- 1 root disk 179, 16 Jan 1 00:00 mmcblk1boot0
brw-rw---- 1 root disk 179, 24 Jan 1 00:00 mmcblk1boot1
brw-rw---- 1 root disk 179, 9 Jan 1 00:00 mmcblk1p1
brw-rw---- 1 root disk 179, 10 Jan 1 00:00 mmcblk1p2
brw-rw---- 1 root disk 179, 32 Jan 1 00:00 mmcblk1rpmb
crw------- 1 root root 10, 63 Jan 1 00:00 mxc_asrc
crw------- 1 root root 10, 61 Jan 1 00:00 network_latency
crw------- 1 root root 10, 60 Jan 1 00:00 network_throughput
crw-rw-rw- 1 root root 1, 3 Jan 1 00:00 null
crw------- 1 root root 108, 0 Jan 1 00:00 ppp
crw------- 1 root root 252, 0 Jan 1 00:00 pps0
crw------- 1 root root 252, 1 Jan 1 00:00 pps1
crw-rw-rw- 1 root tty 5, 2 Jan 1 00:00 ptmx
crw------- 1 root root 251, 0 Jan 1 00:00 ptp0
crw------- 1 root root 251, 1 Jan 1 00:00 ptp1
drwxr-xr-x 2 root root 0 Jan 1 00:00 pts
crw------- 1 root root 10, 58 Jan 1 00:00 pxp_device
brw-rw---- 1 root disk 1, 0 Jan 1 00:00 ram0
brw-rw---- 1 root disk 1, 1 Jan 1 00:00 ram1
brw-rw---- 1 root disk 1, 10 Jan 1 00:00 ram10
brw-rw---- 1 root disk 1, 11 Jan 1 00:00 ram11
brw-rw---- 1 root disk 1, 12 Jan 1 00:00 ram12
brw-rw---- 1 root disk 1, 13 Jan 1 00:00 ram13
brw-rw---- 1 root disk 1, 14 Jan 1 00:00 ram14
brw-rw---- 1 root disk 1, 15 Jan 1 00:00 ram15
brw-rw---- 1 root disk 1, 2 Jan 1 00:00 ram2
brw-rw---- 1 root disk 1, 3 Jan 1 00:00 ram3
brw-rw---- 1 root disk 1, 4 Jan 1 00:00 ram4
brw-rw---- 1 root disk 1, 5 Jan 1 00:00 ram5
brw-rw---- 1 root disk 1, 6 Jan 1 00:00 ram6
brw-rw---- 1 root disk 1, 7 Jan 1 00:00 ram7
brw-rw---- 1 root disk 1, 8 Jan 1 00:00 ram8
brw-rw---- 1 root disk 1, 9 Jan 1 00:00 ram9
crw-rw-rw- 1 root root 1, 8 Jan 1 00:00 random
lrwxrwxrwx 1 root root 4 Jan 1 00:00 rtc -> rtc0
crw------- 1 root root 253, 0 Jan 1 00:00 rtc0
drwxrwxrwx 2 root root 40 Jan 1 00:00 shm
drwxr-xr-x 3 root root 180 Jan 1 00:00 snd
crw------- 1 root root 242, 0 Jan 1 00:00 spidevx
lrwxrwxrwx 1 root root 15 Jan 1 00:00 stderr -> /proc/self/fd/2
lrwxrwxrwx 1 root root 15 Jan 1 00:00 stdin -> /proc/self/fd/0
lrwxrwxrwx 1 root root 15 Jan 1 00:00 stdout -> /proc/self/fd/1
crw-rw-rw- 1 root tty 5, 0 Jan 1 00:00 tty
crw--w---- 1 root tty 4, 0 Jan 1 00:00 tty0
crw--w---- 1 root tty 4, 1 Jan 1 00:00 tty1
crw--w---- 1 root tty 4, 10 Jan 1 00:00 tty10
crw--w---- 1 root tty 4, 11 Jan 1 00:00 tty11
crw--w---- 1 root tty 4, 12 Jan 1 00:00 tty12
crw--w---- 1 root tty 4, 13 Jan 1 00:00 tty13
crw--w---- 1 root tty 4, 14 Jan 1 00:00 tty14
crw--w---- 1 root tty 4, 15 Jan 1 00:00 tty15
crw--w---- 1 root tty 4, 16 Jan 1 00:00 tty16
crw--w---- 1 root tty 4, 17 Jan 1 00:00 tty17
crw--w---- 1 root tty 4, 18 Jan 1 00:00 tty18
crw--w---- 1 root tty 4, 19 Jan 1 00:00 tty19
crw--w---- 1 root tty 4, 2 Jan 1 00:00 tty2
crw--w---- 1 root tty 4, 20 Jan 1 00:00 tty20
crw--w---- 1 root tty 4, 21 Jan 1 00:00 tty21
crw--w---- 1 root tty 4, 22 Jan 1 00:00 tty22
crw--w---- 1 root tty 4, 23 Jan 1 00:00 tty23
crw--w---- 1 root tty 4, 24 Jan 1 00:00 tty24
crw--w---- 1 root tty 4, 25 Jan 1 00:00 tty25
crw--w---- 1 root tty 4, 26 Jan 1 00:00 tty26
crw--w---- 1 root tty 4, 27 Jan 1 00:00 tty27
crw--w---- 1 root tty 4, 28 Jan 1 00:00 tty28
crw--w---- 1 root tty 4, 29 Jan 1 00:00 tty29
crw--w---- 1 root tty 4, 3 Jan 1 00:00 tty3
crw--w---- 1 root tty 4, 30 Jan 1 00:00 tty30
crw--w---- 1 root tty 4, 31 Jan 1 00:00 tty31
crw--w---- 1 root tty 4, 32 Jan 1 00:00 tty32
crw--w---- 1 root tty 4, 33 Jan 1 00:00 tty33
crw--w---- 1 root tty 4, 34 Jan 1 00:00 tty34
crw--w---- 1 root tty 4, 35 Jan 1 00:00 tty35
crw--w---- 1 root tty 4, 36 Jan 1 00:00 tty36
crw--w---- 1 root tty 4, 37 Jan 1 00:00 tty37
crw--w---- 1 root tty 4, 38 Jan 1 00:00 tty38
crw--w---- 1 root tty 4, 39 Jan 1 00:00 tty39
crw--w---- 1 root tty 4, 4 Jan 1 00:00 tty4
crw--w---- 1 root tty 4, 40 Jan 1 00:00 tty40
crw--w---- 1 root tty 4, 41 Jan 1 00:00 tty41
crw--w---- 1 root tty 4, 42 Jan 1 00:00 tty42
crw--w---- 1 root tty 4, 43 Jan 1 00:00 tty43
crw--w---- 1 root tty 4, 44 Jan 1 00:00 tty44
crw--w---- 1 root tty 4, 45 Jan 1 00:00 tty45
crw--w---- 1 root tty 4, 46 Jan 1 00:00 tty46
crw--w---- 1 root tty 4, 47 Jan 1 00:00 tty47
crw--w---- 1 root tty 4, 48 Jan 1 00:00 tty48
crw--w---- 1 root tty 4, 49 Jan 1 00:00 tty49
crw--w---- 1 root tty 4, 5 Jan 1 00:00 tty5
crw--w---- 1 root tty 4, 50 Jan 1 00:00 tty50
crw--w---- 1 root tty 4, 51 Jan 1 00:00 tty51
crw--w---- 1 root tty 4, 52 Jan 1 00:00 tty52
crw--w---- 1 root tty 4, 53 Jan 1 00:00 tty53
crw--w---- 1 root tty 4, 54 Jan 1 00:00 tty54
crw--w---- 1 root tty 4, 55 Jan 1 00:00 tty55
crw--w---- 1 root tty 4, 56 Jan 1 00:00 tty56
crw--w---- 1 root tty 4, 57 Jan 1 00:00 tty57
crw--w---- 1 root tty 4, 58 Jan 1 00:00 tty58
crw--w---- 1 root tty 4, 59 Jan 1 00:00 tty59
crw--w---- 1 root tty 4, 6 Jan 1 00:00 tty6
crw--w---- 1 root tty 4, 60 Jan 1 00:00 tty60
crw--w---- 1 root tty 4, 61 Jan 1 00:00 tty61
crw--w---- 1 root tty 4, 62 Jan 1 00:00 tty62
crw--w---- 1 root tty 4, 63 Jan 1 00:00 tty63
crw--w---- 1 root tty 4, 7 Jan 1 00:00 tty7
crw--w---- 1 root tty 4, 8 Jan 1 00:00 tty8
crw--w---- 1 root tty 4, 9 Jan 1 00:00 tty9
crw------- 1 root root 207, 16 Jan 1 00:04 ttymxc0 //nisy:uart0接口
crw-rw---- 1 root dialout 207, 18 Jan 1 00:00 ttymxc2 //nisy:uart2接口
crw-rw---- 1 root dialout 207, 21 Jan 1 00:00 ttymxc5 //nisy:uart5接口
crw------- 1 root root 10, 57 Jan 1 00:00 ubi_ctrl
crw-rw-rw- 1 root root 1, 9 Jan 1 00:00 urandom
drwxr-xr-x 3 root root 60 Jan 1 00:00 v4l
crw-rw---- 1 root tty 7, 0 Jan 1 00:00 vcs
crw-rw---- 1 root tty 7, 1 Jan 1 00:00 vcs1
crw-rw---- 1 root tty 7, 128 Jan 1 00:00 vcsa
crw-rw---- 1 root tty 7, 129 Jan 1 00:00 vcsa1
crw-rw---- 1 root video 81, 0 Jan 1 00:00 video0
crw------- 1 root root 10, 130 Jan 1 00:00 watchdog
crw------- 1 root root 248, 0 Jan 1 00:00 watchdog0
crw-rw-rw- 1 root root 1, 5 Jan 1 00:00 zero
[root@imx6ull:/dev]#
procfs
[root@imx6ull:/proc]# cat /etc/os-release
NAME=Buildroot
VERSION=2019.02-g4946908395-dirty
ID=buildroot
VERSION_ID=2019.02
PRETTY_NAME="Buildroot 2019.02"
[root@imx6ull:/proc]# cat cpuinfo
processor : 0
model name : ARMv7 Processor rev 5 (v7l)
BogoMIPS : 3.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xc07
CPU revision : 5
Hardware : Freescale i.MX6 UltraLite (Device Tree)
Revision : 0000
Serial : 0000000000000000
[root@imx6ull:/proc]# cat meminfo
MemTotal: 503392 kB
MemFree: 309756 kB
MemAvailable: 376664 kB
Buffers: 3752 kB
Cached: 67880 kB
SwapCached: 0 kB
Active: 44200 kB
Inactive: 53348 kB
Active(anon): 26692 kB
Inactive(anon): 1076 kB
Active(file): 17508 kB
Inactive(file): 52272 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 503392 kB
LowFree: 309756 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 8 kB
Writeback: 0 kB
AnonPages: 25952 kB
Mapped: 37540 kB
Shmem: 1852 kB
Slab: 12124 kB
SReclaimable: 3932 kB
SUnreclaim: 8192 kB
KernelStack: 848 kB
PageTables: 920 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 251696 kB
Committed_AS: 39004 kB
VmallocTotal: 1556480 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
CmaTotal: 327680 kB
CmaFree: 252872 kB
[root@imx6ull:/proc]# cat mounts
/dev/root / ext4 rw,relatime,data=ordered 0 0
devtmpfs /dev devtmpfs rw,relatime,size=87344k,nr_inodes=21836,mode=755 0 0
proc /proc proc rw,relatime 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=666 0 0
tmpfs /dev/shm tmpfs rw,relatime,mode=777 0 0
tmpfs /tmp tmpfs rw,relatime 0 0
tmpfs /run tmpfs rw,nosuid,nodev,relatime,mode=755 0 0
sysfs /sys sysfs rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
[root@imx6ull:/proc]#
[root@imx6ull:/proc]# cat cmdline
console=ttymxc0,115200 root=/dev/mmcblk1p2 rootwait rw
[root@imx6ull:/proc]# cat interrupts
CPU0
16: 9289 GPC 55 Level i.MX Timer Tick
19: 22 GPC 33 Level 2010000.ecspi
20: 9050 GPC 26 Level 2020000.serial
21: 0 GPC 98 Level sai
22: 0 GPC 50 Level 2034000.asrc
40: 0 GPC 4 Level 20cc000.snvs:snvs-powerkey
41: 2884 GPC 120 Level 20b4000.ethernet
42: 0 GPC 121 Level 20b4000.ethernet
43: 0 GPC 80 Level 20bc000.wdog
44: 0 GPC 49 Level imx_thermal
49: 0 GPC 19 Level rtc alarm
55: 0 GPC 2 Level sdma
60: 1 GPC 43 Level 2184000.usb
61: 1551 GPC 42 Level 2184200.usb
62: 0 GPC 118 Level 2188000.ethernet
63: 0 GPC 119 Level 2188000.ethernet
64: 0 GPC 22 Level mmc0
65: 4778 GPC 23 Level mmc1
66: 1 GPC 100 Level 2198000.adc
67: 0 GPC 36 Level 21a0000.i2c
68: 291 GPC 37 Level 21a4000.i2c
70: 3 GPC 5 Level 21c8000.lcdif
71: 0 GPC 8 Level pxp-dmaengine-legacy
72: 0 GPC 18 Level pxp-dmaengine-std
73: 0 GPC 28 Level 21ec000.serial
74: 0 GPC 17 Level 21fc000.serial
75: 0 GPC 46 Level dcp-vmi-irq
76: 0 GPC 47 Level dcp-irq
78: 2 GPC 6 Level imx-rng
80: 0 gpio-mxc 1 Edge inv_mpu
97: 0 gpio-mxc 18 Edge SII902x_det
98: 0 gpio-mxc 19 Edge 2190000.usdhc cd
189: 0 gpio-mxc 14 Edge User2 Button
208: 0 gpio-mxc 1 Edge User1 Button
IPI0: 0 CPU wakeup interrupts
IPI1: 0 Timer broadcast interrupts
IPI2: 0 Rescheduling interrupts
IPI3: 0 Function call interrupts
IPI4: 0 CPU stop interrupts
IPI5: 3858 IRQ work interrupts
IPI6: 0 completion interrupts
Err: 0
[root@imx6ull:/proc]# cat devices
[ 400.697322] random: crng init done
Character devices:
1 mem
4 /dev/vc/0
4 tty
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
29 fb
81 video4linux
89 i2c
90 mtd
108 ppp
116 alsa
128 ptm
136 pts
166 ttyACM
180 usb
188 ttyUSB
189 usb_device
207 ttymxc
216 rfcomm
226 drm
241 adxl345
242 spidevx
243 irda
244 dht11
245 ds18b20
246 ttyGS
247 ttyLP
248 watchdog
249 tee
250 iio
251 ptp
252 pps
253 rtc
254 gpiochip
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
31 mtdblock
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
[root@imx6ull:/proc]#
[root@imx6ull:/proc]#
[root@imx6ull:/proc]# cat uptime
411.42 393.86
[root@imx6ull:/proc]# cat iomem
00905000-0091ffff : 905000.sram
01804000-01805fff : /soc/dma-apbh@01804000
02010000-02013fff : /soc/aips-bus@02000000/spba-bus@02000000/ecspi@02010000
02020000-02023fff : /soc/aips-bus@02000000/spba-bus@02000000/serial@02020000
0202c000-0202ffff : /soc/aips-bus@02000000/spba-bus@02000000/sai@0202c000
02034000-02037fff : /soc/aips-bus@02000000/spba-bus@02000000/asrc@02034000
02080000-02083fff : /soc/aips-bus@02000000/pwm@02080000
02084000-02087fff : /soc/aips-bus@02000000/pwm@02084000
02088000-0208bfff : /soc/aips-bus@02000000/pwm@02088000
0208c000-0208ffff : /soc/aips-bus@02000000/pwm@0208c000
02090000-02093fff : /soc/aips-bus@02000000/can@02090000
0209c000-0209ffff : /soc/aips-bus@02000000/gpio@0209c000
020a0000-020a3fff : /soc/aips-bus@02000000/gpio@020a0000
020a4000-020a7fff : /soc/aips-bus@02000000/gpio@020a4000
020a8000-020abfff : /soc/aips-bus@02000000/gpio@020a8000
020ac000-020affff : /soc/aips-bus@02000000/gpio@020ac000
020b4000-020b7fff : /soc/aips-bus@02000000/ethernet@020b4000
020bc000-020bffff : /soc/aips-bus@02000000/wdog@020bc000
020c9000-020c9fff : /soc/aips-bus@02000000/usbphy@020c9000
020ca000-020cafff : /soc/aips-bus@02000000/usbphy@020ca000
020e0000-020e3fff : /soc/aips-bus@02000000/iomuxc@020e0000
020ec000-020effff : /soc/aips-bus@02000000/sdma@020ec000
020f0000-020f3fff : /soc/aips-bus@02000000/pwm@020f0000
020f4000-020f7fff : /soc/aips-bus@02000000/pwm@020f4000
020f8000-020fbfff : /soc/aips-bus@02000000/pwm@020f8000
020fc000-020fffff : /soc/aips-bus@02000000/pwm@020fc000
02184000-021841ff : /soc/aips-bus@02100000/usb@02184000
02184000-021841ff : /soc/aips-bus@02100000/usb@02184000
02184200-021843ff : /soc/aips-bus@02100000/usb@02184200
02184200-021843ff : /soc/aips-bus@02100000/usb@02184200
02184800-021849ff : /soc/aips-bus@02100000/usbmisc@02184800
02188000-0218bfff : /soc/aips-bus@02100000/ethernet@02188000
02190000-02193fff : /soc/aips-bus@02100000/usdhc@02190000
02194000-02197fff : /soc/aips-bus@02100000/usdhc@02194000
02198000-0219bfff : /soc/aips-bus@02100000/adc@02198000
021a0000-021a3fff : /soc/aips-bus@02100000/i2c@021a0000
021a4000-021a7fff : /soc/aips-bus@02100000/i2c@021a4000
021b8000-021bbfff : /soc/aips-bus@02100000/weim@021b8000
021bc000-021bffff : /soc/aips-bus@02100000/ocotp-ctrl@021bc000
021c8000-021cbfff : /soc/aips-bus@02100000/lcdif@021c8000
021cc000-021cffff : /soc/aips-bus@02100000/pxp@021cc000
021ec000-021effff : /soc/aips-bus@02100000/serial@021ec000
021fc000-021fffff : /soc/aips-bus@02100000/serial@021fc000
02280000-02283fff : /soc/aips-bus@02200000/dcp@02280000
02290000-0229ffff : /soc/aips-bus@02200000/iomuxc-snvs@02290000
80000000-9fffffff : System RAM =512MB
80008000-80efffff : Kernel code
81000000-8112aa5f : Kernel data
[root@imx6ull:/proc]#
sysfs
[root@imx6ull:~]# ls -al /sys/devices/platform/
total 0
drwxr-xr-x 10 root root 0 Jan 1 00:00 .
drwxr-xr-x 9 root root 0 Jan 1 00:00 ..
drwxr-xr-x 4 root root 0 Jan 1 00:00 Fixed MDIO bus.0
drwxr-xr-x 4 root root 0 Jan 1 00:00 Vivante GCCore
drwxr-xr-x 3 root root 0 Jan 1 00:00 alarmtimer
drwxr-xr-x 3 root root 0 Jan 1 00:00 imx6q-cpufreq
drwxr-xr-x 2 root root 0 Jan 1 00:02 power
drwxr-xr-x 4 root root 0 Jan 1 00:00 reg-dummy
drwxr-xr-x 3 root root 0 Jan 1 00:00 regulatory.0
drwxr-xr-x 3 root root 0 Jan 1 00:00 snd-soc-dummy
-rw-r--r-- 1 root root 4096 Jan 1 00:00 uevent
[root@imx6ull:~]#
查询温度
[root@100ask:~]# for i in /sys/devices/virtual/thermal/thermal_zone* ; do echo $i ;echo type:$(cat $i/type); echo temp:$(cat $i/temp); echo trip_point_0_type:$(cat $i/trip_point_0_type); echo trip_point_0_hyst:$(cat $i/trip_point_0_hyst); echo trip_point_0_temp:$(cat $i/trip_point_0_temp); echo trip_point_1_type:$(cat $i/trip_point_1_type); echo trip_point_1_hyst:$(cat $i/trip_point_1_hyst); echo trip_point_1_temp:$(cat $i/trip_point_1_temp);echo; done
/sys/devices/virtual/thermal/thermal_zone0
type:imx_thermal_zone
temp:47831
trip_point_0_type:passive
cat: /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_hyst: No such file or directory
trip_point_0_hyst:
trip_point_0_temp:95000
trip_point_1_type:critical
cat: /sys/devices/virtual/thermal/thermal_zone0/trip_point_1_hyst: No such file or directory
trip_point_1_hyst:
trip_point_1_temp:100000
[root@100ask:~]#
