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。

  M! D; z) a( L  v  ]) p! a7 V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
) ^0 C1 r6 q$ ?# U: BBANK1，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
$ A, k" L8 D" s; e! Y8 _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
( }; U) ]& S8 |* \% m. q; `( edriver，emcraft现在的SDK比两三年前多了不少外设驱动，可以都试试看。

4 I; w* [" t7 f% B. }% R) K

# ^. A2 o  t/ k( X( X) s* m& M

5 p8 U* @/ R3 }' X% ^% j1 C
' O4 L  c: z- m. y
' `- x+ I0 {1 ~9 o, g2 V+ dU-Boot 2010.03 (Nov 26 2018 - 21:30:21)
$ d) b+ o! G# r0 k. p3 ?6 u: U
, ~# [! d4 N% m( D" |) |' YCPU  : STM32F7 (Cortex-M7)
: ~+ ?& E# F" T5 GFreqs: SYSCLK=216MHz,HCLK=216MHz,PCLK1=54MHz,PCLK2=108MHz
) N: Y1 Y$ Q9 u( a# H7 E2 o" ^Board: STM32F750 Rev 1.0
& G% O; k) Z' h0 U; N3 C4 ~DRAM:  64 MB
In:    serial
Out:   serial
; l: e& w. ]4 g' P/ I1 SErr:   serial
QSPI:  32 MB mapped at 0x90000000
% T9 h- Y  X" \Net:   miiphy_register done.
eth hw init done.
3 M+ k  }. G7 U7 ASTM32_MAC
4 p# A! n2 W% Y, U8 J2 ~$ e+ q" f/ ^- jHit any key to stop autoboot:  0
- R" r# \! s: d8 a$ gBooting 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
- j( @2 p% R' I% O; \3 H! N0 r- v   Load Address: c0008000
/ l. b  b5 j% B  E2 Y6 k   Entry Point:  c0008001
" t* D4 B: K. l   Contents:
      Image 0: 7471388 Bytes =  7.1 MB
+ D: i6 r$ O# n' N% l/ G      Image 1: 24895 Bytes = 24.3 kB
   Verifying Checksum ... OK
## Flattened Device Tree from multi component Image at C0007FC0
   Booting using the fdt at 0xc0728128
1 Y, d& i* {4 ^) E# ?# P: C   Loading Multi-File Image ... OK
OK
WARNING: legacy format multi component image overwritten
6 A7 J8 |4 ?4 G; B$ e0 S4 k# J   Loading Device Tree to c3ff6000, end c3fff13e ... OK
+ `! i  j6 O- x9 [5 ?* _
1 u; z) t7 H4 l& M" W9 JStarting kernel ...Booting Linux on physical CPU 0x0
9 D8 J3 y3 t% h. G- ~: p  y- DLinux version 4.2.0(gcc version 4.4.1 (Sourcery G++ Lite 2010
q1-189) ) #90 Tue Dec 4 03:32:33 EST 2018
CPU: ARMv7-M [410fc271] revision 1 (ARMv7M), cr=00000000
7 m# k0 _/ {" p& t  D  E% X9 ZCPU: WBA data cache, WBA instruction cache
Machine model: EmCraft Systems STM32F7-SOM board
' w) `: t* Z5 y/ ]" w  ?& z% tBuilt 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: stm32_platform=stm32f7-disco console=ttyS0,115200 panic=10 ip=169.25
4.1.10:169.254.1.2:::stm32f7-disco:eth0:ff
, H) x8 [. A0 Z8 U& N: mPID hash table entries: 256 (order: -2, 1024 bytes)
0 ~7 q& d, t6 h7 i' I" |Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
3 a" g. A) n8 A$ f1 L" t- {Memory: 56432K/65536K available (2523K kernel code, 181K rwdata, 588K rodata, 4000K init,
111K bss, 9104K reserved, 0K cma-reserved)
- v) t0 }; m/ A( YVirtual kernel memory layout:
4 w7 m7 ]0 D6 Y% s    vector  : 0x00000000 - 0x00001000   (   4 kB)
/ ?7 p8 G% |( }# p2 v8 S; ?    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
1 e( O$ S# C" N6 j( y! \# C    vmalloc : 0x00000000 - 0xffffffff   (4095 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
7 z3 t& _8 m6 _, D  d      .text : 0xc0008000 - 0xc0312000   (3112 kB)
      .init : 0xc0312000 - 0xc06fa000   (4000 kB)
      .data : 0xc06fa000 - 0xc07277c0   ( 182 kB)
       .bss : 0xc072811c - 0xc0743e84   ( 112 kB)

NR_IRQS:16 nr_irqs:16 16
! S. f# c! s" e/interrupt-controller@40013c00: 24 External IRQs detected
: Q9 q8 c- G: ]$ G2 W0 B% h; ]' {. G4 e9 lclocksource: arm_system_timer: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 27651335
+ c$ A4 ?6 L2 r# e$ O8 ns
; ~& R: ?3 X  L( cARM System timer initialized as clocksource
) U1 K8 u4 G- h- I2 w9 W! a; |0 n/soc/timer@40000000: STM32 clockevent driver initialized (32 bits)
sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
Calibrating delay loop... 427.62 BogoMIPS (lpj=2138112)
pid_max: default: 4096 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
: A6 n: K. y6 a2 J, w2 KMountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
' a3 {: u' G. vdevtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275
0000 ns
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
( X# ~1 H' _/ Cstm32-pinctrl pin-controller: nbanks = 11
stm32-pinctrl pin-controller: nfunctions = 20
7 p& ~1 P- _1 x; p* rstm32-pinctrl pin-controller: ngroups = 23
3 c1 D( H7 t* p/ j' M5 n- H9 Estm32-pinctrl pin-controller: GPIOA bank added.
stm32-pinctrl pin-controller: GPIOB bank added.
stm32-pinctrl pin-controller: GPIOC bank added.
' y+ C! `4 n* R! B! w( N0 e4 ostm32-pinctrl pin-controller: GPIOD bank added.
! U  g9 j0 c3 B6 s6 Nstm32-pinctrl pin-controller: GPIOE bank added.
stm32-pinctrl pin-controller: GPIOF bank added.
stm32-pinctrl pin-controller: GPIOG bank added.
stm32-pinctrl pin-controller: GPIOH bank added.
stm32-pinctrl pin-controller: GPIOI bank added.
; |( p# X, A2 X9 F/ Kstm32-pinctrl pin-controller: GPIOJ bank added.
stm32-pinctrl pin-controller: GPIOK bank added.
# C3 K2 K: t2 A3 ^2 Sstm32-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]
4 f! U0 {' o, K5 c4 Pstm32-pinctrl pin-controller: Function[4         name:sdio,     groups:1]
5 p( S1 y. i4 W) H2 t2 n$ X- lstm32-pinctrl pin-controller: Function[5         name:spi_2,    groups:1]
stm32-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 R! K. Z0 B7 A2 D' q: Rstm32-pinctrl pin-controller: Function[9         name:usart6,   groups:1]
8 a$ ?7 j  O. p/ a5 Estm32-pinctrl pin-controller: Function[10        name:usart7,   groups:1]
4 }: B& C% C' G# O  n9 A5 j( zstm32-pinctrl pin-controller: Function[11        name:usb_fs,   groups:1]
stm32-pinctrl pin-controller: Function[12        name:usb_hs,   groups:1]
stm32-pinctrl pin-controller: Function[13        name:can_1,    groups:1]
stm32-pinctrl pin-controller: Function[14        name:adc1_in0_pin,     groups:1]
) I( x. R" H+ k/ l! H. vstm32-pinctrl pin-controller: Function[15        name:dac_out2_pin,     groups:1]
stm32-pinctrl pin-controller: Function[16        name:ltdc,     groups:1]
6 r$ |0 y& p: Bstm32-pinctrl pin-controller: Function[17        name:sai_2,    groups:1]
/ ^7 ^8 @8 E5 R+ Y) k2 U; W/ ~( @stm32-pinctrl pin-controller: Function[18        name:i2c_4,    groups:1]
& j+ q0 O8 d& w( v" Ostm32-pinctrl pin-controller: Function[19        name:gpio,     groups:3]
stm32-dma 40026000.dma: STM32 DMA driver registered
/ A4 E* j0 L0 a1 lstm32-dma 40026400.dma: STM32 DMA driver registered
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
1 F6 R) ]: h- P  o( I3 cusbcore: registered new interface driver hub
) y) U* E( z9 I' R+ A) Q( F$ S3 ]usbcore: registered new device driver usb
" J8 \- h% V8 tsoc:phy_hs supply vcc not found, using dummy regulator
1 E! }% u, d9 Y% _% i2 k; y+ L* |soc:phy_fs supply vcc not found, using dummy regulator
" h' d4 Z2 f& v' r" [pps_core: LinuxPPS API ver. 1 registered
* ]8 j* s8 P$ Fpps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
Advanced Linux Sound Architecture Driver Initialized.
Bluetooth: Core ver 2.20
NET: Registered protocol family 31
9 ~3 g  d/ F- n: P% o1 DBluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
. Y! Z* T- e/ `2 C$ ?- BBluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
clocksource: Switched to clocksource arm_system_timer
3 `& k6 @1 d9 p7 V9 N! ONET: Registered protocol family 2
' a/ a1 L4 h5 @TCP established hash table entries: 1024 (order: 0, 4096 bytes)
: x! u; M) j5 Q0 yTCP bind hash table entries: 1024 (order: 0, 4096 bytes)
4 Z2 Y3 I; n; @) N" pTCP: Hash tables configured (established 1024 bind 1024)
: n  ~: l' T$ p' }& e* f2 |; E. bUDP 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.
- Q1 v7 [9 W1 h* @4 R. URPC: Registered udp transport module.
( K; e2 S$ i; i& ]; A% YRPC: Registered tcp transport module.
' @# a- j4 b( ?! L: L9 @. H! a$ `RPC: Registered tcp NFSv4.1 backchannel transport module.
3 y) ?( m5 d& {Power Management for STM32
5 U% W6 G! b" r0 H  Tfutex hash table entries: 16 (order: -5, 192 bytes)
! [- S. a- m( p; g. b4 qjffs2: version 2.2. (NAND) (SUMMARY)  漏 2001-2006 Red Hat, Inc.
$ j1 a! y" S+ ?2 tfuse init (API version 7.23)
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
- w9 v: K& o6 jio scheduler noop registered
4 u* M1 Z) l- A& [8 D3 C* Rio scheduler cfq registered (default)
' \% `$ @3 x8 L3 x- Z! e" ]/ z, p6 Ustm32-pinctrl pin-controller: maps: function gpio group pwms num 2
stm32-pwm pwm0: basing on TIM3.1(x16)
stm32-pinctrl pin-controller: maps: function ltdc group ltdc-0 num 29
stm32_lcdfb 40016800.ltdc: fb0: fb device registered successfully
STM32 USART driver initialized
stm32-pinctrl pin-controller: maps: function usart1 group usart1-0 num 3
40011000.serial: ttyS0 at MMIO 0x40011000 (irq = 34, base_baud = 6750000) is a stm32-usar
3 F4 m" W' _+ c, M4 \t
3 z8 l/ y' {2 x; o5 Dconsole [ttyS0] enabled
5 I' U- F) F' G% \stm32-pinctrl pin-controller: maps: function usart6 group usart6-0 num 3
40011400.serial: ttyS5 at MMIO 0x40011400 (irq = 35, base_baud = 6750000) is a stm32-usar
* F6 y( l7 ^- ~! x& Bt
nbd: registered device at major 43
stm32-pinctrl pin-controller: maps: function dac_out2_pin group dac-0 num 2
stm32_dac 40007400.dac: dac1: no timer assigned, DMA functionality is not available
; G0 t: }6 Z1 T' O  A! {stm32_dac 40007400.dac: created 1 character devices with MAJOR 248
  r7 c. A  m8 @  R2 ofpart partitions found on MTD device physmap-stm-flash.0
: z; Z& ]8 x" x* j9 \! x) }Creating 2 MTD partitions on "physmap-stm-flash.0":
0x000000000000-0x000000020000 : "stm_flash_uboot"
0x000000040000-0x000000100000 : "stm_flash_unused"
stm32-pinctrl pin-controller: maps: function spi_5 group spi_5-0 num 4
4 [* L1 {  ]5 J8 L# z2 Xstm32-spi 40015000.spi: SPI Controller 4 at 40015000,irq=38,hz=108000000
CAN device driver interface
stm32-pinctrl pin-controller: maps: function can_1 group can_1-0 num 3
stm32-can 40006400.can: device registered (reg=40006400, irq=31)
stm32-pinctrl pin-controller: maps: function mac group mac_rmii num 10
/ j: v) _( M0 ~% K& gstmmac - user ID: 0x10, Synopsys ID: 0x35
Ring mode enabled
DMA HW capability register supported
Enhanced/Alternate descriptors
# S% r! O2 S; Y$ @3 C        Enabled extended descriptors
RX Checksum Offload Engine supported (type 2)
TX Checksum insertion supported
8 ^$ S8 |* @) E* Q( L, k4 d Wake-Up On Lan supported
Enable RX Mitigation via HW Watchdog Timer
stm32-dwmac 40028000.ethernet eth0: No MDIO subnode found
9 H, U- i& m" `' k% @" m' elibphy: stmmac: probed
eth0: PHY ID 0007c0f1 at 0 IRQ POLL (stmmac-0:00) active
! x1 A4 T; @$ g) c" }PPP generic driver version 2.4.2
PPP BSD Compression module registered
PPP Deflate Compression module registered
4 Z" j  o  ~# \! {3 o+ A7 \. rusbcore: registered new interface driver rt2800usb
stm32-pinctrl pin-controller: maps: function usb_hs group usb_hs-0 num 3
dwc2 40040000.usb: DWC OTG Controller
3 ^6 Z& X6 O6 l0 @dwc2 40040000.usb: new USB bus registered, assigned bus number 1
% S+ w/ [0 n9 H( W( Z% `  Cdwc2 40040000.usb: irq 56, io mem 0x00000000
" @- z, Y) A* q/ Eusb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
3 h7 d5 G: ]0 |& @/ }$ g* ?9 uusb usb1: Product: DWC OTG Controller
usb usb1: Manufacturer: Linux 4.2.0 dwc2_hsotg
' n" X8 a7 T/ a, ~( |usb usb1: SerialNumber: 40040000.usb
7 d1 l, q% x) R5 k& yhub 1-0:1.0: USB hub found
$ W" q- n4 C6 n& x( g5 Ohub 1-0:1.0: 1 port detected
stm32-pinctrl pin-controller: maps: function usb_fs group usb_fs-0 num 3
50000000.usb supply vusb_d not found, using dummy regulator
50000000.usb supply vusb_a not found, using dummy regulator
8 B! D+ d1 J# m1 d! Kdwc2 50000000.usb: EPs: 6, dedicated fifos, 512 entries in SPRAM
dwc2 50000000.usb: DCFG=0x08200000, DCTL=0x00000002, DIEPMSK=0000000b
dwc2 50000000.usb: GAHBCFG=0x00000000, GHWCFG1=0x00000000
, {% Y& i& I4 Q/ n: rdwc2 50000000.usb: GRXFSIZ=0x000000a0, GNPTXFSIZ=0x004000a0
, {& `: i  g8 |4 W& Vdwc2 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
5 _: B* Z) R9 u2 c: |) d. ~dwc2 50000000.usb: DPTx[4] FSize=512, StAddr=0x00000a00
$ n* ^: _' \% D1 `" m- Sdwc2 50000000.usb: DPTx[5] FSize=512, StAddr=0x00000c00
) x: D$ E1 y1 i4 _2 S" Hdwc2 50000000.usb: ep0-in: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
: o. p& M; B! A7 }9 S: udwc2 50000000.usb: ep0-out: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep1-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
2 @7 R5 p* C8 Y2 P3 w; Sdwc2 50000000.usb: ep1-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep2-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
) {8 p1 W9 U0 N. Odwc2 50000000.usb: ep2-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep3-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep3-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep4-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
dwc2 50000000.usb: ep4-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
! S$ j5 e% f* Y2 D0 Q$ Tdwc2 50000000.usb: ep5-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
6 Q5 [3 [' w& R% a, x4 J9 [dwc2 50000000.usb: ep5-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
) E. C% N3 Y* ?% i( [dwc2 50000000.usb: DVBUSDIS=0x000017d7, DVBUSPULSE=000005b8
( h7 z( y3 f4 }, _' Ausbcore: registered new interface driver cdc_acm
cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
usbcore: registered new interface driver uas
usbcore: registered new interface driver usb-storage
% j  O; Z% n( Q6 `g_serial gadget: Gadget Serial v2.4
g_serial gadget: g_serial ready
dwc2 50000000.usb: bound driver g_serial
% l1 F- _' u4 o' I9 G" U. @i2c /dev entries driver
4 E" x  b6 V& P/ p% v' H9 H! K* K+ i+ mstm32-pinctrl pin-controller: maps: function i2c_4 group i2c_4-0 num 3
; T6 o0 E- y' D6 }+ ~- o- `bmp085 3-0077: Successfully initialized bmp085!
stm32f7-i2c 40006000.i2c: I2C Controller i2c-3 at 40006000,irq=58
Driver for 1-wire Dallas network protocol.
0 ?4 J+ R2 f3 x# |! yusbcore: registered new interface driver btusb
5 E' b& T' Z1 G/ ~$ N. }8 i: U- Tstm32-pinctrl pin-controller: maps: function sdio group sdio-0 num 7
) H! u/ R: ^* c# Dmmci-pl18x 40012c00.sdi: Got CD GPIO
9 o" V( Y% Q0 j& M! g, zmmci-pl18x 40012c00.sdi: mmc0: PL180 manf 80 rev4 at 0x40012c00 irq 37,0 (pio)
stm32-dma 40026400.dma: stm32_dma_of_xlate: unable to get channel 3 - was already request
ed
9 O1 Q! \' J2 @! n; x- S; D# S; Wmmci-pl18x 40012c00.sdi: DMA channels RX dma1chan3, TX dma1chan3
stm32_gpio_to_irq: Event line 3 now points to fire interrupts from bank G
$ X$ W. h# W! P3 \- A2 t4 \stm32-pinctrl pin-controller: maps: function gpio group outs num 2
8 u; ?& Q, C5 _3 W4 |. r9 ^" Whidraw: raw HID events driver (C) Jiri Kosina
9 V' y: C; Z% _0 E- |# I0 D* a7 ~usbcore: registered new interface driver usbhid
% Q, ~' a& i6 d% a. s" Eusbhid: USB HID core driver
4 W- b) ^. ~8 c" mstm32-pinctrl pin-controller: maps: function adc1_in0_pin group adc1-0 num 2
stm32f4-adc 40012000.adc: registered
8 B$ i8 `' c4 e/ u; @stm32-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
& L+ o  R6 k9 b5 X0 B6 M9 k8 Bed
" Z9 W: s; R0 S& n$ h3 W3 I- estm32-asoc-card sound: failed to find codec platform device
stm32-asoc-card: probe of sound failed with error -22
6 X% a6 F- W" JNET: Registered protocol family 17
% c3 C0 u: j" A; [5 J6 @, s' `can: controller area network core (rev 20120528 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20120528)
4 z0 n9 r' n) n; g- Kcan: broadcast manager protocol (rev 20120528 t)
7 Q2 x; g1 l" P1 ocan: netlink gateway (rev 20130117) max_hops=1
Bluetooth: RFCOMM TTY layer initialized
5 d; x9 _  o' W3 HBluetooth: RFCOMM socket layer initialized
& y: b% T7 V9 [6 O( ^Bluetooth: RFCOMM ver 1.11
hctosys: unable to open rtc device (rtc0)
: V% k! a6 p) e7 o7 D/ Xvmmc: disabling
ALSA device list:
2 f( ?9 n% O# j% s7 k; @  No soundcards found.
2 t3 d& q7 h6 y2 c! {, WFreeing unused kernel memory: 4000K (c0312000 - c06fa000)
" v: u  l# d8 |7 Ninit started: BusyBox v1.24.2 (2018-11-22 20:35:58 EST)
/ # amixer: Mixer attach default error: No such file or directory
stm32-dwmac 40028000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
8 Q. w' Q" l9 A; t1 t# Y% g8 y
, V- I0 U6 O; P8 d8 {# J" i- B0 I; O/ # free
5 @& X8 I& g$ Z* l             total       used       free     shared    buffers     cached
Mem:         60432       8140      52292          0          0       4792
-/+ buffers/cache:       3348      57084
/ #

/ [5 v3 ]- j# h: A5 j

* n5 U  b4 ?9 X6 G! x( o