硬件是新的R3板。配套的USB OTG线。
完全按照 https://github.com/aodzip/buildroot-tiny200 这个来编译。
启动之后如果连接USB 线到电脑，可以识别到。
板端显示：
[ 77.827933] g_ether gadget: high-speed config #1: CDC Ethernet (ECM)
PC端lsusb可以显示：
Bus 001 Device 002: ID 0525:a4a2 Netchip Technology, Inc. Linux-USB Ethernet/RNDIS Gadget
但是是互相PING不通的。PC UBUNTU 隔一段时间的显示connection fail。
后来修改linux-menuconfig里面
Device Drivers > USB support > USB Gadget Support
把Ethernet Gadget (with CDC Ethernet support) 改为Network Control Model (NCM) support 后，
重新编译就可以PING通了。
证明USB是可以工作在DEVICE模式的。
但是现在问题是用OTG 线接鼠标键盘，U盘都不能识别。测量USB口是有5V电压的。
OTG线接在ANDROID手机上是可以读到U盘的，就是线是好的。
奇怪的是无论什么情况下用 lsusb都是什么都没有显示，连根USB设备都没有显示。
这是什么情况呢？
启动的信息如下：
reboot
# Stopping network: OK
Saving random seed: SKIP (read-only file system detected)
Stopping klogd: OK
Stopping syslogd: OK
umount: devtmpfs busy - remounted read-only
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system reboot
[ 88.669563] reboot: Restarting system
U-Boot SPL 2020.07 (Aug 31 2020 - 12:20:16 +0800)
DRAM: 64 MiB
Trying to boot from MMC1
Card did not respond to voltage select!
spl: mmc init failed with error: -95
Trying to boot from MMC2
Card did not respond to voltage select!
spl: mmc init failed with error: -95
Trying to boot from sunxi SPI
U-Boot 2020.07 (Aug 31 2020 - 12:20:16 +0800) Allwinner Technology
CPU: Allwinner F Series (SUNIV)
Model: Allwinner F1C100s Generic Device
DRAM: 64 MiB
MMC: mmc@1c0f000: 0, mmc@1c10000: 1
Setting up a 480x272 lcd console (overscan 0x0)
In: serial
Out: vga
Err: vga
Allwinner mUSB OTG (Peripheral)
Hit any key to stop autoboot: 0
Booting from FEL...
Card did not respond to voltage select!
Card did not respond to voltage select!
Card did not respond to voltage select!
List of MTD devices:
No MTD device found
SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
Booting from SPI-NOR...
device 0 offset 0x80000, size 0x4000
SF: 16384 bytes @ 0x80000 Read: OK
device 0 offset 0x100000, size 0x700000
SF: 7340032 bytes @ 0x100000 Read: OK
## Flattened Device Tree blob at 80700000
Booting using the fdt blob at 0x80700000
Loading Device Tree to 816f9000, end 816ff714 ... OK
Cannot setup simplefb: node not found
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.4.58 (root@ubuntu) (gcc version 8.4.0 (Buildroot 2020.02.4)) #6 Fri Sep 4 18:14:40 PST 2020
[ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] OF: fdt: Machine model: Widora TINY200 R3
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] cma: Reserved 16 MiB at 0x83000000
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 16256
[ 0.000000] Kernel command line: console=ttyS0,115200 earlyprintk rootwait consoleblank=0 net.ifnames=0 biosdevname=0 root=/dev/mtdblock3
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 38756K/65536K available (6144K kernel code, 238K rwdata, 1620K rodata, 1024K init, 221K bss, 10396K reserved, 16384K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from start_kernel+0x254/0x444 with crng_init=0
[ 0.000034] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[ 0.000096] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[ 0.000552] Console: colour dummy device 80x30
[ 0.000633] Calibrating delay loop... 383.38 BogoMIPS (lpj=1916928)
[ 0.050223] pid_max: default: 32768 minimum: 301
[ 0.050551] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.050582] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.051901] CPU: Testing write buffer coherency: ok
[ 0.053427] Setting up static identity map for 0x80100000 - 0x80100058
[ 0.054406] devtmpfs: initialized
[ 0.060825] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.060870] futex hash table entries: 256 (order: -1, 3072 bytes, linear)
[ 0.063958] pinctrl core: initialized pinctrl subsystem
[ 0.065778] NET: Registered protocol family 16
[ 0.068024] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.069402] cpuidle: using governor menu
[ 0.098795] SCSI subsystem initialized
[ 0.099067] usbcore: registered new interface driver usbfs
[ 0.099173] usbcore: registered new interface driver hub
[ 0.099307] usbcore: registered new device driver usb
[ 0.099679] mc: Linux media interface: v0.10
[ 0.099758] videodev: Linux video capture interface: v2.00
[ 0.099866] pps_core: LinuxPPS API ver. 1 registered
[ 0.099878] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.099919] PTP clock support registered
[ 0.100319] Advanced Linux Sound Architecture Driver Initialized.
[ 0.101984] clocksource: Switched to clocksource timer
[ 0.124782] thermal_sys: Registered thermal governor 'step_wise'
[ 0.125306] NET: Registered protocol family 2
[ 0.126369] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.126422] TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.126453] TCP bind hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.126480] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.126702] UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.126746] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.127120] NET: Registered protocol family 1
[ 0.128825] NetWinder Floating Point Emulator V0.97 (double precision)
[ 0.130121] Initialise system trusted keyrings
[ 0.130600] workingset: timestamp_bits=30 max_order=14 bucket_order=0
[ 0.144023] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.207356] Key type asymmetric registered
[ 0.207385] Asymmetric key parser 'x509' registered
[ 0.207520] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 0.207537] io scheduler mq-deadline registered
[ 0.207546] io scheduler kyber registered
[ 0.217288] suniv-f1c100s-pinctrl 1c20800.pinctrl: initialized sunXi PIO driver
[ 0.232950] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled
[ 0.237166] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
[ 0.238169] printk: console [ttyS0] disabled
[ 0.258436] 1c25400.serial: ttyS0 at MMIO 0x1c25400 (irq = 28, base_baud = 6250000) is a 16550A
[ 0.672791] printk: console [ttyS0] enabled
[ 0.680392] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pd not found, using dummy regulator
[ 0.697224] panel-simple panel: panel supply power not found, using dummy regulator
[ 0.706196] SCSI Media Changer driver v0.25
[ 0.711506] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pc not found, using dummy regulator
[ 0.723840] spi-nor spi0.0: w25q128 (16384 Kbytes)
[ 0.729527] 4 fixed-partitions partitions found on MTD device spi0.0
[ 0.735969] Creating 4 MTD partitions on "spi0.0":
[ 0.740764] 0x000000000000-0x000000080000 : "u-boot"
[ 0.748311] 0x000000080000-0x000000090000 : "dtb"
[ 0.755590] 0x000000100000-0x000000800000 : "kernel"
[ 0.763138] 0x000000800000-0x000001000000 : "rootfs"
[ 0.770982] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.777604] ehci-platform: EHCI generic platform driver
[ 0.783143] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.789375] ohci-platform: OHCI generic platform driver
[ 0.795019] usbcore: registered new interface driver usb-storage
[ 0.801728] usb_phy_generic usb_phy_generic.0.auto: usb_phy_generic.0.auto supply vcc not found, using dummy regulator
[ 0.814405] using random self ethernet address
[ 0.818860] using random host ethernet address
[ 0.824275] usb0: HOST MAC fe:04:df:84:69:02
[ 0.828627] usb0: MAC 16:1f:34:3e:3c:1a
[ 0.832623] using random self ethernet address
[ 0.837064] using random host ethernet address
[ 0.841639] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 0.848323] g_ether gadget: g_ether ready
[ 0.852718] i2c /dev entries driver
[ 0.856637] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pd not found, using dummy regulator
[ 0.869060] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pe not found, using dummy regulator
[ 0.879892] ov5640 0-003c: 0-003c supply DOVDD not found, using dummy regulator
[ 0.887473] ov5640 0-003c: 0-003c supply AVDD not found, using dummy regulator
[ 0.894901] ov5640 0-003c: 0-003c supply DVDD not found, using dummy regulator
[ 0.902611] ov5640 0-003c: ov5640_read_reg: error: reg=300a
[ 0.908186] ov5640 0-003c: ov5640_check_chip_id: failed to read chip identifier
[ 0.916539] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pe not found, using dummy regulator
[ 0.928790] sunxi-wdt 1c20ca0.watchdog: Watchdog enabled (timeout=16 sec, nowayout=0)
[ 0.938145] suniv-f1c100s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pf not found, using dummy regulator
[ 0.975460] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB
[ 0.984075] usbcore: registered new interface driver usbhid
[ 0.989640] usbhid: USB HID core driver
[ 0.996396] debugfs: Directory '1c23c00.codec' with parent 'F1C100s Audio Codec' already present!
[ 1.008959] sun4i-codec 1c23c00.codec: Codec <-> 1c23c00.codec mapping ok
[ 1.021823] NET: Registered protocol family 17
[ 1.026452] Key type dns_resolver registered
[ 1.031517] Loading compiled-in X.509 certificates
[ 1.045502] sun4i-backend 1e60000.display-backend: Couldn't find matching frontend, frontend features disabled
[ 1.056054] sun4i-drm soc:display-engine: bound 1e60000.display-backend (ops 0xc0739a14)
[ 1.065163] sun4i-drm soc:display-engine: bound 1c0c000.lcd-controller (ops 0xc07385b4)
[ 1.073593] sun4i-drm soc:display-engine: bound 1c0a000.tv-encoder (ops 0xc07392d4)
[ 1.081241] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.087923] [drm] No driver support for vblank timestamp query.
[ 1.095108] [drm] Initialized sun4i-drm 1.0.0 20150629 for soc:display-engine on minor 0
[ 1.103891] [drm] kms: can't enable cloning when we probably wanted to.
[ 1.154323] Console: switching to colour frame buffer device 60x34
[ 1.177495] sun4i-drm soc:display-engine: fb0: sun4i-drmdrmfb frame buffer device
[ 1.185777] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 1.199397] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 1.206219] ALSA device list:
[ 1.209200] #0: F1C100s Audio Codec
[ 1.213331] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 1.222046] cfg80211: failed to load regulatory.db
[ 1.229335] random: fast init done
[ 1.238436] VFS: Mounted root (squashfs filesystem) readonly on device 31:3.
[ 1.249363] devtmpfs: mounted
[ 1.255940] Freeing unused kernel memory: 1024K
[ 1.260547] Run /sbin/init as init process
[ 1.342827] random: crng init done
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Saving random seed: SKIP (read-only file system detected)
Starting network: OK
Welcome to Widora TINY200 R3
buildroot login: root
# lsusb
#离线