前段时间ST推出了Value Line的STM32F750和H750两个系列，看了一下选型表，F750有LQFP144封装，正好适合我的STM32 linux板子。

于是，双十一买了几片。同时，我对我的linux板做了小幅改版：将SPI Flash容量扩大到32MB并连接到F750的QSPI
* P0 \; W7 b1 b+ O( N6 ]1 Y4 CBANK1，添加了CAN收发器和接口，增加了两个I2C外设（温湿度传感器和气压传感器）。板子做回来后先焊了一片，调试过程还算比较顺利，现在u-boot和Linux都工作起来了，下面是系统启动log，F750速度还是相当快的（427.62
BogoMIPS，F429跑Linux只有35.84
BogoMIPS），QSPI的加载速度也很给力。下一步我准备多测试几种STM32外设的Linux
driver，emcraft现在的SDK比两三年前多了不少外设驱动，可以都试试看。
  ]' D: T  Q6 L/ `+ G& `, o
5 B6 y0 W8 d5 p( s9 t% T

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: b- Y7 y0 ~( q$ O* t4 t- W2 B" FU-Boot 2010.03 (Nov 26 2018 - 21:30:21)
3 S2 L+ n. [1 ]" v6 J: @
CPU  : STM32F7 (Cortex-M7)
Freqs: SYSCLK=216MHz,HCLK=216MHz,PCLK1=54MHz,PCLK2=108MHz
" i, ^) E- ~5 q& [% DBoard: STM32F750 Rev 1.0
4 \# X& S- s- ~* A1 u8 P" G+ |DRAM:  64 MB
In:    serial
) P$ @' j4 W3 `/ \' J' M  {$ [Out:   serial
  g$ m1 N. @8 w! mErr:   serial
QSPI:  32 MB mapped at 0x90000000
Net:   miiphy_register done.
eth hw init done.
# s7 |+ Y- T# n; |& f# t7 d( vSTM32_MAC
* r! e: H* h% l& L3 ~/ p) f; vHit any key to stop autoboot:  0
Booting from QSPI
## Booting kernel from Legacy Image at c0007fc0 ...
   Image Name:   Linux-4.2.0
   Image Type:   ARM Linux Multi-File Image (uncompressed)
   Data Size:    7496295 Bytes =  7.1 MB
% \! P% ]0 w. e3 \   Load Address: c0008000
   Entry Point:  c0008001
. N. J' b3 J8 r6 z  b; t   Contents:
      Image 0: 7471388 Bytes =  7.1 MB
      Image 1: 24895 Bytes = 24.3 kB
9 u7 ~! b' C# T8 z. n" j5 O/ U   Verifying Checksum ... OK
## Flattened Device Tree from multi component Image at C0007FC0
6 `9 {4 x, G, N; |   Booting using the fdt at 0xc0728128
3 \+ _* O) q5 _   Loading Multi-File Image ... OK
% }) q  @& z, O. {; w7 _8 |OK
WARNING: legacy format multi component image overwritten
1 m1 L% L" o/ p/ B( Q   Loading Device Tree to c3ff6000, end c3fff13e ... OK

7 n  z5 B" t; AStarting kernel ...Booting Linux on physical CPU 0x0
Linux version 4.2.0(gcc version 4.4.1 (Sourcery G++ Lite 2010
q1-189) ) #90 Tue Dec 4 03:32:33 EST 2018
$ ~5 z8 @& z' Q- r4 ]8 K6 SCPU: ARMv7-M [410fc271] revision 1 (ARMv7M), cr=00000000
/ Q4 Z- E4 B8 {: DCPU: WBA data cache, WBA instruction cache
Machine model: EmCraft Systems STM32F7-SOM board
( X  p% }1 I! OBuilt 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
1 W4 U% p. U' s" iKernel command line: stm32_platform=stm32f7-disco console=ttyS0,115200 panic=10 ip=169.25
' r" R* W4 x$ v- d  k  l4.1.10:169.254.1.2:::stm32f7-disco:eth0:ff
7 O2 c, y0 u* z2 M2 p3 gPID hash table entries: 256 (order: -2, 1024 bytes)
& ?! o# V1 ?' MDentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
0 X5 i- Q8 A; b4 B* ~Memory: 56432K/65536K available (2523K kernel code, 181K rwdata, 588K rodata, 4000K init,
6 J+ k" ?  ]: X4 {( B2 _: g. n111K bss, 9104K reserved, 0K cma-reserved)
Virtual kernel memory layout:
7 [) u! V% g- s) ~; w3 D& A- ?1 h    vector  : 0x00000000 - 0x00001000   (   4 kB)
3 i$ ?/ e! l4 z2 s1 Q1 P$ q8 ?    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0x00000000 - 0xffffffff   (4095 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
) j$ ~2 R' G2 A6 \7 G3 N# U      .text : 0xc0008000 - 0xc0312000   (3112 kB)
      .init : 0xc0312000 - 0xc06fa000   (4000 kB)
      .data : 0xc06fa000 - 0xc07277c0   ( 182 kB)
       .bss : 0xc072811c - 0xc0743e84   ( 112 kB)
( u* ~+ i( |2 i" \2 M. p. {' r
NR_IRQS:16 nr_irqs:16 16
' \" \. B( h3 S1 ?+ q/interrupt-controller@40013c00: 24 External IRQs detected
clocksource: arm_system_timer: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 27651335
8 ns
8 P# ^. @8 ~% @& v0 fARM System timer initialized as clocksource
( ~4 _, |" e3 x/ v: }3 @% ?- |1 {6 s/soc/timer@40000000: STM32 clockevent driver initialized (32 bits)
7 G& l/ r) r0 V6 y* P! H  m2 Ssched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
% j; C- n* \$ l( l+ i7 z* nCalibrating delay loop... 427.62 BogoMIPS (lpj=2138112)
' ]& I( E& C" N; c- jpid_max: default: 4096 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
devtmpfs: initialized
- J' i: Y9 \% E8 gclocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275
0000 ns
pinctrl core: initialized pinctrl subsystem
* Q2 O7 y3 C' s" bNET: Registered protocol family 16
stm32-pinctrl pin-controller: nbanks = 11
stm32-pinctrl pin-controller: nfunctions = 20
stm32-pinctrl pin-controller: ngroups = 23
stm32-pinctrl pin-controller: GPIOA bank added.
/ M4 Z" x, ^8 W. X4 ^stm32-pinctrl pin-controller: GPIOB bank added.
stm32-pinctrl pin-controller: GPIOC bank added.
5 Q* l/ G  N, E7 w; ^- tstm32-pinctrl pin-controller: GPIOD bank added.
stm32-pinctrl pin-controller: GPIOE bank added.
stm32-pinctrl pin-controller: GPIOF bank added.
) g4 M0 n2 b( e) I- W8 O* \stm32-pinctrl pin-controller: GPIOG bank added.
" A. f0 l/ b( mstm32-pinctrl pin-controller: GPIOH bank added.
stm32-pinctrl pin-controller: GPIOI bank added.
3 b+ R7 s/ ~# G7 Bstm32-pinctrl pin-controller: GPIOJ bank added.
2 o1 W  Q% P; e( A  }) tstm32-pinctrl pin-controller: GPIOK bank added.
stm32-pinctrl pin-controller: Function[0         name:i2c_1,    groups:1]
stm32-pinctrl pin-controller: Function[1         name:i2c_2,    groups:1]
stm32-pinctrl pin-controller: Function[2         name:i2c_3,    groups:1]
stm32-pinctrl pin-controller: Function[3         name:mac,      groups:2]
stm32-pinctrl pin-controller: Function[4         name:sdio,     groups:1]
  @) ~: X& q: i( O- H; Ustm32-pinctrl pin-controller: Function[5         name:spi_2,    groups:1]
2 O4 e, ]5 w6 g( k0 ?. n) m. Cstm32-pinctrl pin-controller: Function[6         name:spi_4,    groups:1]
stm32-pinctrl pin-controller: Function[7         name:spi_5,    groups:1]
stm32-pinctrl pin-controller: Function[8         name:usart1,   groups:1]
0 y% ^$ A  m2 D8 E6 ^. Nstm32-pinctrl pin-controller: Function[9         name:usart6,   groups:1]
stm32-pinctrl pin-controller: Function[10        name:usart7,   groups:1]
stm32-pinctrl pin-controller: Function[11        name:usb_fs,   groups:1]
) U" x8 I! |( i: T0 Astm32-pinctrl pin-controller: Function[12        name:usb_hs,   groups:1]
stm32-pinctrl pin-controller: Function[13        name:can_1,    groups:1]
$ g. c& P7 Y9 W9 A# A3 R' wstm32-pinctrl pin-controller: Function[14        name:adc1_in0_pin,     groups:1]
stm32-pinctrl pin-controller: Function[15        name:dac_out2_pin,     groups:1]
stm32-pinctrl pin-controller: Function[16        name:ltdc,     groups:1]
7 I4 P4 s/ A$ O- c% D( Bstm32-pinctrl pin-controller: Function[17        name:sai_2,    groups:1]
stm32-pinctrl pin-controller: Function[18        name:i2c_4,    groups:1]
stm32-pinctrl pin-controller: Function[19        name:gpio,     groups:3]
stm32-dma 40026000.dma: STM32 DMA driver registered
$ G4 `5 V2 {0 ]2 u- L& ?& W$ q( Estm32-dma 40026400.dma: STM32 DMA driver registered
# [, y) M  ~4 N9 S: b2 PSCSI subsystem initialized
: [8 _% h* M3 \' iusbcore: registered new interface driver usbfs
1 D4 S: o/ N% e* u# Y7 \% _( gusbcore: registered new interface driver hub
usbcore: registered new device driver usb
& p  S* u& {6 i% Ssoc:phy_hs supply vcc not found, using dummy regulator
soc:phy_fs supply vcc not found, using dummy regulator
+ j# y5 e6 C! Y2 }( fpps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
* Y& Y9 U/ n5 I" t) MPTP clock support registered
. k- F- V1 V7 d/ h. B7 b: d/ KAdvanced Linux Sound Architecture Driver Initialized.
Bluetooth: Core ver 2.20
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
1 k8 u3 M5 B5 [$ O$ R% xBluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
' h+ F6 y- W  \! cclocksource: Switched to clocksource arm_system_timer
5 q# B0 ]8 [- Z- p3 x0 vNET: Registered protocol family 2
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
) ?0 [' d% ^, Q0 H, M1 HTCP bind hash table entries: 1024 (order: 0, 4096 bytes)
6 K$ N0 ^) z4 B; y1 VTCP: Hash tables configured (established 1024 bind 1024)
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
7 |1 U! i9 V, y$ \5 j6 QRPC: Registered udp transport module.
, p" C$ a; l8 ?: g2 V! @( T( j9 qRPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
2 H/ G+ c3 h& vPower Management for STM32
8 R  \& @7 N- hfutex hash table entries: 16 (order: -5, 192 bytes)
jffs2: version 2.2. (NAND) (SUMMARY)  漏 2001-2006 Red Hat, Inc.
9 T- q& y; ]& Z6 c( m" ~  zfuse init (API version 7.23)
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
. C/ h8 n6 I- @io scheduler noop registered
, ~  K1 [7 S' A' V( P$ e: j/ @io scheduler cfq registered (default)
( O$ l3 |  V  z- Y& Sstm32-pinctrl pin-controller: maps: function gpio group pwms num 2
stm32-pwm pwm0: basing on TIM3.1(x16)
& _: h2 w6 q: w& l- `stm32-pinctrl pin-controller: maps: function ltdc group ltdc-0 num 29
stm32_lcdfb 40016800.ltdc: fb0: fb device registered successfully
( b8 d7 b3 r) u( e  r' g8 zSTM32 USART driver initialized
, t3 V4 c  M" y3 a! gstm32-pinctrl pin-controller: maps: function usart1 group usart1-0 num 3
' ^) U9 y# Y8 f4 q40011000.serial: ttyS0 at MMIO 0x40011000 (irq = 34, base_baud = 6750000) is a stm32-usar
t
console [ttyS0] enabled
stm32-pinctrl pin-controller: maps: function usart6 group usart6-0 num 3
+ p; f8 M# o5 {. X" \! [  q40011400.serial: ttyS5 at MMIO 0x40011400 (irq = 35, base_baud = 6750000) is a stm32-usar
t
nbd: registered device at major 43
stm32-pinctrl pin-controller: maps: function dac_out2_pin group dac-0 num 2
/ C; {$ W/ X8 j; V4 h0 F3 M5 _2 sstm32_dac 40007400.dac: dac1: no timer assigned, DMA functionality is not available
: W3 I/ \  S) o7 O6 Fstm32_dac 40007400.dac: created 1 character devices with MAJOR 248
2 ofpart partitions found on MTD device physmap-stm-flash.0
7 i" @4 y- b) ?# T* i1 [Creating 2 MTD partitions on "physmap-stm-flash.0":
0 u. O5 |: p, T9 c0x000000000000-0x000000020000 : "stm_flash_uboot"
" C" E) V! t0 M; F% j1 Y0x000000040000-0x000000100000 : "stm_flash_unused"
stm32-pinctrl pin-controller: maps: function spi_5 group spi_5-0 num 4
stm32-spi 40015000.spi: SPI Controller 4 at 40015000,irq=38,hz=108000000
4 J, v9 k  a9 b4 [CAN device driver interface
stm32-pinctrl pin-controller: maps: function can_1 group can_1-0 num 3
$ F. t* k& a. a6 n: I2 ]6 dstm32-can 40006400.can: device registered (reg=40006400, irq=31)
( W, S# W9 ]7 v; \stm32-pinctrl pin-controller: maps: function mac group mac_rmii num 10
4 e6 y+ G* f4 T! w3 E! N4 cstmmac - user ID: 0x10, Synopsys ID: 0x35
6 x2 ~) ]4 |% y5 Y& U Ring mode enabled
DMA HW capability register supported
Enhanced/Alternate descriptors
        Enabled extended descriptors
+ p6 d: Z3 N" V$ ~/ L2 C RX Checksum Offload Engine supported (type 2)
8 V) C( L8 l/ B. a. _) H% ?! S, m TX Checksum insertion supported
Wake-Up On Lan supported
Enable RX Mitigation via HW Watchdog Timer
1 ^! {3 F- K7 X0 A5 |3 Astm32-dwmac 40028000.ethernet eth0: No MDIO subnode found
) G+ [% r0 b* dlibphy: stmmac: probed
eth0: PHY ID 0007c0f1 at 0 IRQ POLL (stmmac-0:00) active
  |0 ^5 _) F; {5 ]PPP generic driver version 2.4.2
2 \* c8 X: o1 b, c# @/ iPPP BSD Compression module registered
- J! n  N  S% P; lPPP Deflate Compression module registered
usbcore: registered new interface driver rt2800usb
- d/ i3 b0 ?2 _: q3 r3 Q; V0 B3 M: Pstm32-pinctrl pin-controller: maps: function usb_hs group usb_hs-0 num 3
( v9 C$ t; Y2 ?: N+ o. tdwc2 40040000.usb: DWC OTG Controller
$ J$ r+ o0 V9 M; c9 kdwc2 40040000.usb: new USB bus registered, assigned bus number 1
dwc2 40040000.usb: irq 56, io mem 0x00000000
5 ]! _: u- j9 b+ ~9 V8 husb usb1: New USB device found, idVendor=1d6b, idProduct=0002
& E1 H3 T. X4 ]6 ousb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
, o0 ~, e; x4 K5 {) n$ vusb usb1: Product: DWC OTG Controller
( y# r$ i9 \8 v$ Husb usb1: Manufacturer: Linux 4.2.0 dwc2_hsotg
, R* T, P$ Q8 Q- a* G% c; Z. V% }usb usb1: SerialNumber: 40040000.usb
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
  k7 b: S. K" W! \/ fstm32-pinctrl pin-controller: maps: function usb_fs group usb_fs-0 num 3
50000000.usb supply vusb_d not found, using dummy regulator
9 W7 Z! M5 P0 k6 Z' Q7 r( w+ s1 {* }50000000.usb supply vusb_a not found, using dummy regulator
dwc2 50000000.usb: EPs: 6, dedicated fifos, 512 entries in SPRAM
% O9 b/ g7 o6 q+ }1 M! F8 zdwc2 50000000.usb: DCFG=0x08200000, DCTL=0x00000002, DIEPMSK=0000000b
1 E( n0 s* |5 s% zdwc2 50000000.usb: GAHBCFG=0x00000000, GHWCFG1=0x00000000
( w6 M4 r9 F  X. O4 ~; bdwc2 50000000.usb: GRXFSIZ=0x000000a0, GNPTXFSIZ=0x004000a0
: {  P+ O1 a. T) m0 ?* [5 \dwc2 50000000.usb: DPTx[1] FSize=32, StAddr=0x000000e0
dwc2 50000000.usb: DPTx[2] FSize=64, StAddr=0x00000100
dwc2 50000000.usb: DPTx[3] FSize=512, StAddr=0x00000800
4 x; ~4 S/ o, Ddwc2 50000000.usb: DPTx[4] FSize=512, StAddr=0x00000a00
8 \) E! J; X7 @; A% B  Zdwc2 50000000.usb: DPTx[5] FSize=512, StAddr=0x00000c00
% p) Y2 A8 S2 k& C( pdwc2 50000000.usb: ep0-in: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
- i  |6 x8 m$ }' Y% P, L/ C- Ddwc2 50000000.usb: ep0-out: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep1-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep1-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep2-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
5 @) H( S9 H7 `: fdwc2 50000000.usb: ep2-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
* d) r* s. a. s4 b) q9 r4 H3 O- g- tdwc2 50000000.usb: ep3-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
' b1 K8 e" s0 i0 t) q* G0 Ddwc2 50000000.usb: ep3-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep4-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
  C, ]; f4 j. _3 ]/ d  mdwc2 50000000.usb: ep4-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep5-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep5-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
/ `# ~) _1 J7 {. P. }. xdwc2 50000000.usb: DVBUSDIS=0x000017d7, DVBUSPULSE=000005b8
usbcore: registered new interface driver cdc_acm
5 w: ^7 N8 e/ H2 Q4 M! \8 p' c8 _cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
7 O- l( U* ~' Wusbcore: registered new interface driver uas
0 {; U9 N% v0 c' K2 L& G9 gusbcore: registered new interface driver usb-storage
g_serial gadget: Gadget Serial v2.4
g_serial gadget: g_serial ready
dwc2 50000000.usb: bound driver g_serial
i2c /dev entries driver
( Z, o9 _/ c% y$ Istm32-pinctrl pin-controller: maps: function i2c_4 group i2c_4-0 num 3
bmp085 3-0077: Successfully initialized bmp085!
. {( t7 }2 @, W: h! dstm32f7-i2c 40006000.i2c: I2C Controller i2c-3 at 40006000,irq=58
! v3 u/ f$ C( K/ S% W% tDriver for 1-wire Dallas network protocol.
$ u0 `/ o  b/ {( s9 [' \usbcore: registered new interface driver btusb
( P  S+ {% Y6 ]7 Y5 hstm32-pinctrl pin-controller: maps: function sdio group sdio-0 num 7
mmci-pl18x 40012c00.sdi: Got CD GPIO
mmci-pl18x 40012c00.sdi: mmc0: PL180 manf 80 rev4 at 0x40012c00 irq 37,0 (pio)
% q: [' E2 P2 t/ u0 G; sstm32-dma 40026400.dma: stm32_dma_of_xlate: unable to get channel 3 - was already request
) ?5 _$ }" Q3 O5 ~ed
) h0 v! x9 t0 ^, |1 zmmci-pl18x 40012c00.sdi: DMA channels RX dma1chan3, TX dma1chan3
0 o4 r6 q1 V1 s* ]1 ^stm32_gpio_to_irq: Event line 3 now points to fire interrupts from bank G
1 Z+ N' c% S1 V3 s" Vstm32-pinctrl pin-controller: maps: function gpio group outs num 2
( a4 x1 P6 w# ?8 I7 N3 Mhidraw: raw HID events driver (C) Jiri Kosina
usbcore: registered new interface driver usbhid
7 u* o8 A2 L+ z! l3 \usbhid: USB HID core driver
stm32-pinctrl pin-controller: maps: function adc1_in0_pin group adc1-0 num 2
% p7 [9 U+ b  \5 F( A1 |, `stm32f4-adc 40012000.adc: registered
+ K7 \4 F$ J0 Nstm32-pinctrl pin-controller: maps: function sai_2 group sai_2-0 num 5
stm32-dma 40026400.dma: stm32_dma_of_xlate: unable to get channel 4 - was already request
$ Q) p( z+ I: d4 Z7 eed
$ |% s$ Z- d  r" ~# [stm32-asoc-card sound: failed to find codec platform device
stm32-asoc-card: probe of sound failed with error -22
NET: Registered protocol family 17
) W" N- Z% s& X& Mcan: controller area network core (rev 20120528 abi 9)
NET: Registered protocol family 29
) s" \( J8 d; S$ y0 J+ Q2 y  l: Lcan: raw protocol (rev 20120528)
can: broadcast manager protocol (rev 20120528 t)
can: netlink gateway (rev 20130117) max_hops=1
Bluetooth: RFCOMM TTY layer initialized
. Z3 {( I7 F/ UBluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
5 d) g% w( k9 nhctosys: unable to open rtc device (rtc0)
vmmc: disabling
1 `: B/ R1 @* F& }ALSA device list:
  No soundcards found.
Freeing unused kernel memory: 4000K (c0312000 - c06fa000)
( h) l) V* y2 I& c* a/ Uinit started: BusyBox v1.24.2 (2018-11-22 20:35:58 EST)
5 s3 V6 H1 ~) z) J, t* f1 |/ # amixer: Mixer attach default error: No such file or directory
stm32-dwmac 40028000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
4 e2 d# q$ G) M1 D$ \6 j7 {
/ # free
             total       used       free     shared    buffers     cached
: e0 d$ w5 H/ OMem:         60432       8140      52292          0          0       4792
) [5 u( B; N/ j  V' r: b-/+ buffers/cache:       3348      57084
/ #



$ s5 O- x" j  u, R! ~- l
  b) o7 x# k' V( Y' {