服务器评测
1.usb 可以使用此命令读取u盘里的内容,此命令加上相关参数可以有以下功能：
1.1usb start 在使用u盘之前必须启动此命令以初始化好fat文件系统环境，笔者的输出如下:
linuxidc # usb start
(Re)start USB…
USB: Starting the controller
scanning bus for devices… 5 USB Device(s) found
scanning bus for storage devices… usb_stor_get_info->1431,blksz:512
Device NOT ready
Request Sense returned 02 3A 00
2 Storage Device(s) found
1.2 usb dev 查看检测到的usb设备,笔者的输出如下:
linuxidc # usb dev
USB device 0: Vendor: Lexar Rev: 1100 Prod: USB Flash Drive
Type: Removable Hard Disk
Capacity: 3824.0 MB = 3.7 GB (7831552 x 512)
1.3 usb info可列出usb host的属性,笔者的输出如下:
linuxidc # usb dev
USB device 0: Vendor: Lexar Rev: 1100 Prod: USB Flash Drive
Type: Removable Hard Disk
Capacity: 3824.0 MB = 3.7 GB (7831552 x 512)
linuxidc # usb info
1: Hub, USB Revision 1.10
– OHCI Root Hub
– Class: Hub
– PacketSize: 8 Configurations: 1
– Vendor: 0x0000 Product 0x0000 Version 0.0
Configuration: 1
– Interfaces: 1 Self Powered 0mA
Interface: 0
– Alternate Setting 0, Endpoints: 1
– Class Hub
– Endpoint 1 In Interrupt MaxPacket 2 Interval 255ms
2: Hub, USB Revision 2.0
– USB2.0 Hub
– Class: Hub
– PacketSize: 64 Configurations: 1
– Vendor: 0x05e3 Product 0x0608 Version 133.54
Configuration: 1
– Interfaces: 1 Self Powered Remote Wakeup 100mA
Interface: 0
– Alternate Setting 0, Endpoints: 1
– Class Hub
– Endpoint 1 In Interrupt MaxPacket 1 Interval 255ms
3: Hub, USB Revision 2.0
– USB2.0 Hub
– Class: Hub
– PacketSize: 64 Configurations: 1
– Vendor: 0x05e3 Product 0x0608 Version 133.54
Configuration: 1
– Interfaces: 1 Self Powered Remote Wakeup 100mA
Interface: 0
– Alternate Setting 0, Endpoints: 1
– Class Hub
– Endpoint 1 In Interrupt MaxPacket 1 Interval 255ms
4: Mass Storage, USB Revision 2.0
– Lexar USB Flash Drive AA066NWLMLMLBQPX
– Class: (from Interface) Mass Storage
– PacketSize: 64 Configurations: 1
– Vendor: 0x05dc Product 0xa813 Version 17.0
Configuration: 1
– Interfaces: 1 Bus Powered 200mA
Interface: 0
– Alternate Setting 0, Endpoints: 2
– Class Mass Storage, Transp. SCSI, Bulk only
– Endpoint 1 In Bulk MaxPacket 64
– Endpoint 2 Out Bulk MaxPacket 64
5: Mass Storage, USB Revision 2.0
– Generic Ultra Fast Media 000000225001
– Class: (from Interface) Mass Storage
– PacketSize: 64 Configurations: 1
– Vendor: 0x0424 Product 0x2240 Version 1.152
Configuration: 1
– Interfaces: 1 Bus Powered 96mA
Interface: 0
– Alternate Setting 0, Endpoints: 2
– Class Mass Storage, Transp. SCSI, Bulk only
– Endpoint 2 Out Bulk MaxPacket 64
– Endpoint 2 In Bulk MaxPacket 64
1.4 usb storage 可列出u盘设备信息:
linuxidc # usb storage
Device 0: Vendor: Lexar Rev: 1100 Prod: USB Flash Drive
Type: Removable Hard Disk
Capacity: 3824.0 MB = 3.7 GB (7831552 x 512)
Device 1: Vendor: Generic Rev: 1.98 Prod: Ultra HS-COMBO
Type: Removable Hard Disk
Capacity: not available
1.5 usb tree 列出设备树：
linuxidc # usb tree
Device Tree:
1 Hub (12 Mb/s, 0mA)
| OHCI Root Hub
|
+-2 Hub (12 Mb/s, 100mA)
| USB2.0 Hub
|
+-3 Hub (12 Mb/s, 100mA)
| | USB2.0 Hub
| |
| +-4 Mass Storage (12 Mb/s, 200mA)
| Lexar USB Flash Drive AA066NWLMLMLFEPX
|
+-5 Mass Storage (12 Mb/s, 96mA)
Generic Ultra Fast Media 000000135404
1.6 usb part 列出u盘的分区表
linuxidc # usb part
Partition Map for USB device 0 — Partition Type: DOS
Partition Start Sector Num Sectors Type
1 2048 7829504 83
## Unknown partition table
2. fatls 列出fat文件系统中的内容,i其用法如下:
usage: fatls <interface> <dev[:part]> [directory] interface是指定哪种类型的设备，此处笔者用的usb设备，因此填入usb，dev就是设备号，笔者从以上命令得知为0
linuxidc # fatls usb 0
187495 check.png
system volume information/
4051616 uimage
hello/
.trash-1000/
2 file(s), 3 dir(s)
3. fatload 从u盘加载文件到指定内存地址处，用法如下:
usage: fatload <interface> <dev[:part]> <addr> <filename> [bytes] interface和dev不再叙述，addr 指定要加载文件到内存的某个地址，filename指定要加载的文件名
linuxidc # fatload usb 0 0x42000000 uimage
reading uimage
……………………………………………………………………
…………………………………………………………………….
……………………………………………………………………..
………………………………………………………………………..
…………………………………………………………………
4221634 bytes read
4.sf 支持spi/qspi flash的操作,必须先擦除再写
4.1 sf probe 在操作spi flash之前必须进行此操作:
linuxidc # sf probe 0
32768 KiB spi_flash at 0:0 is now current device
4.2 sf erase 擦除操作:
linuxidc # sf erase 0x100000 0x400000 (0x100000是要擦除的起始地址，0x400000为指定要擦除的大小)
Erasing at 0x500000 — 100% complete.
4.3 sf write 写操作:
linuxidc # sf write 0x42000000 0x100000 0x400000
Writing at 0x500000 — 100% complete.
分析uboot中 make xxx_config过程 http://www.linuxidc.com/Linux/2017-06/145292.htm
U-Boot源代码下载地址 http://www.linuxidc.com/Linux/2011-07/38897.htm
本文永久更新链接地址：http://www.linuxidc.com/Linux/2017-10/147367.htm
