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Linux系统调整 系统烧录到SD卡后，正常已经可以启动，并且通过串口看到打出来的启动记录了。 U-Boot SPL 2020.04-rc4 (Apr 02 2020 -11:31:41 +0800) Model: STMicroelectronics STM32MP157A-DK1 Discovery Board RAM: DDR3-1066/888 bin G 1x4Gb 533MHzv1.45 Trying to boot from MMC1 U-Boot 2020.04-rc4 (Apr 02 2020 -11:31:41 +0800) CPU: STM32MP157AAC Rev.B Model: STMicroelectronicsSTM32MP157A-DK1 Discovery Board Board: stm32mp1 in basic mode(st,stm32mp157a-dk1) Board: MB1272 Var1 Rev.C-01 DRAM: 512 MiB Clocks: - MPU : 650 MHz - MCU : 208.878 MHz - AXI : 266.500 MHz - PER : 24 MHz - DDR : 533 MHz NAND: 0 MiB MMC: STM32 SDMMC2: 0 Loading Environment from EXT4... OK In: serial Out: serial Err: serial **************************************************** * WARNING 500mA power supply detected * * Current too low, use a 3A power supply! * **************************************************** Net: eth0: ethernet@5800a000 Hit any key to stop autoboot: 0 Boot over mmc0! switch to par titions #0, OK mmc0 is current device Scanning mmc 0:4... Found /boot/extlinux/extlinux.conf Retrieving file:/boot/extlinux/extlinux.conf 125 bytes read in 21 ms (4.9 KiB/s) 1: stm32mp15-buildroot Retrieving file: /boot/zImage 3944592 bytes read in 187 ms (20.1MiB/s) append: root=/dev/mmcblk0p4 rootwait Retrieving file:/boot/stm32mp157a-dk1.dtb 68262 bytes read in 24 ms (2.7 MiB/s) ## Flattened Device Tree blob atc4000000 Booting using the fdt blob at 0xc4000000 ERROR: reserving fdt memory regionfailed (addr=dc000000 size=4000000) Using Device Tree in place at c4000000, end c4013aa5 Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.19.26 (jy@jiyong) (gcc version 8.2.1 20180802(GNU Toolchain for the A-profile Architecture 8.2-2018.11 (arm-rel-8.26))) #1SMP PREEMPT Thu Apr 2 11:37:48 CST 2020 [ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7),cr=10c5387d [ 0.000000] CPU: div instructions available: patching division code [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasinginstruction cache [ 0.000000] OF: fdt: Machine model: STMicroelectronics STM32MP157A-DK1Discovery Board [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] Reserved memory: created DMA memory pool at 0x10000000, size 0MiB [ 0.000000] OF: reserved mem: initialized node mcuram2@0x10000000,compatible id shared-dma-pool [ 0.000000] Reserved memory: created DMA memory pool at 0x10040000, size 0MiB [ 0.000000] OF: reserved mem: initialized node vdev0vring0@10040000,compatible id shared-dma-pool [ 0.000000] Reserved memory: created DMA memory pool at 0x10042000, size 0MiB [ 0.000000] OF: reserved mem: initialized node vdev0vring1@10042000,compatible id shared-dma-pool [ 0.000000] Reserved memory: created DMA memory pool at 0x10044000, size 0MiB [ 0.000000] OF: reserved mem: initialized node vdev0buffer@10044000,compatible id shared-dma-pool [ 0.000000] Reserved memory: created DMA memory pool at 0x30000000, size 0MiB [ 0.000000] OF: reserved mem: initialized node mcuram@0x30000000,compatible id shared-dma-pool [ 0.000000] Reserved memory: created DMA memory pool at 0x38000000, size 0MiB [ 0.000000] OF: reserved mem: initialized node retram@0x38000000,compatible id shared-dma-pool [ 0.000000] cma: Reserved 128 MiB at 0xd4000000 [ 0.000000] psci: probing for conduit method from DT. [ 0.000000] psci: PSCIv1.0 detected in firmware. [ 0.000000] psci: Using standard PSCI v0.2 function IDs [ 0.000000] psci: Trusted OS migration not required [ 0.000000] psci: SMC Calling Convention v1.0 [ 0.000000] random: get_random_bytes called from start_kernel+0x9c/0x400with crng_init=0 [ 0.000000] percpu: Embedded 15 pages/cpu @(ptrval) s30028 r8192 d23220u61440 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 113792 [ 0.000000] Kernel command line: root=/dev/mmcblk0p4 rootwait [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Memory: 313440K/458752K available (6144K kernel code, 190Krwdata, 1416K rodata, 1024K init, 165K bss, 14240K reserved, 131072Kcma-reserved, 0K highmem) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4kB) [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) [ 0.000000] vmalloc : 0xdc800000- 0xff800000 ( 560 MB) [ 0.000000] lowmem : 0xc0000000 - 0xdc000000 ( 448 MB) [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2MB) [ 0.000000] modules : 0xbf000000- 0xbfe00000 ( 14 MB) [ 0.000000] .text : 0x(ptrval)- 0x(ptrval) (7136 kB) [ 0.000000] .init : 0x(ptrval)- 0x(ptrval) (1024 kB) [ 0.000000] .data : 0x(ptrval) - 0x(ptrval) ( 191 kB) [ 0.000000] .bss : 0x(ptrval)- 0x(ptrval) ( 166 kB) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000] rcu: Preemptible hierarchical RCU implementation. [ 0.000000] rcu: RCU restrictingCPUs from NR_CPUS=4 to nr_cpu_ids=2. [ 0.000000] Tasks RCU enabled. [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 [ 0.000000] /soc/interrupt-controller@5000d000: bank0 [ 0.000000] /soc/interrupt-controller@5000d000: bank1 [ 0.000000] /soc/interrupt-controller@5000d000: bank2 [ 0.000000] arch_timer: cp15 timer(s) running at 24.00MHz (virt). [ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffffmax_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns [ 0.000009] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every4398046511097ns [ 0.000026] Switching to timer-based delay loop, resolution 41ns [ 0.001121] Console: colour dummy device 80x30 [ 0.002368] console [tty0] enabled [ 0.002419] Calibrating delay loop (skipped), value calculated using timerfrequency.. 48.00 BogoMIPS (lpj=240000) [ 0.002470] pid_max: default: 32768 minimum: 301 [ 0.002687] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.002729] Mountpoint-cache hash table entries: 1024 (order: 0, 4096bytes) [ 0.003393] CPU: Testing write buffer coherency: ok [ 0.003830] CPU0: update cpu_capacity 1024 [ 0.003871] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.059758] Setting up static identity map for 0xc0100000 - 0xc0100060 [ 0.079739] rcu: Hierarchical SRCU implementation. [ 0.119826] smp: Bringing up secondary CPUs ... [ 0.200094] CPU1: update cpu_capacity 1024 [ 0.200106] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 [ 0.200253] smp: Brought up 1 node, 2 CPUs [ 0.200332] SMP: Total of 2 processors activated (96.00 BogoMIPS). [ 0.200359] CPU: All CPU(s) started in SVC mode. [ 0.201330] devtmpfs: initialized [ 0.222711] VFP support v0.3: implementor 41 architecture 2 part 30variant 7 rev 5 [ 0.223195] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff,max_idle_ns: 19112604462750000 ns [ 0.223263] futex hash table entries: 512 (order: 3, 32768 bytes) [ 0.228795] pinctrl core: initialized pinctrl subsystem [ 0.229895] NET: Registered protocol family 16 [ 0.252217] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.255802] stm32-pm-domain pm_domain: domain core-ret-power-domainregistered [ 0.255875] stm32-pm-domain pm_domain: subdomain core-power-domainregistered [ 0.255910] stm32-pm-domain pm_domain: domains probed [ 0.267754] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOA bankadded [ 0.268100] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOB bankadded [ 0.268365] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOC bankadded [ 0.268627] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOD bankadded [ 0.268873] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOE bankadded [ 0.269123] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOF bankadded [ 0.269379] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOG bankadded [ 0.269625] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOH bankadded [ 0.269878] stm32mp157-pinctrl soc:pin-controller@50002000: GPIOI bankadded [ 0.270027] stm32mp157-pinctrl soc:pin-controller@50002000: Pinctrl STM32initialized [ 0.270750] stm32mp157-pinctrl soc:pin-controller-z@54004000: GPIOZ bankadded [ 0.270804] stm32mp157-pinctrl soc:pin-controller-z@54004000: PinctrlSTM32 initialized [ 0.282712] stm32-mdma 58000000.dma: STM32 MDMA driver registered [ 0.284229] u***core: registered new interface driver u***fs [ 0.284340] u***core: registered new interface driver hub [ 0.284503] u***core: registered new device driver u*** [ 0.284750] pps_core: LinuxPPS API ver. 1 registered [ 0.284778] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 RodolfoGiometti < giometti@linux.it> [ 0.284838] PTP clock support registered [ 0.285191] Advanced Linux Sound Architecture Driver Initialized. [ 0.286178] clocksource: Switched to clocksource arch_sys_counter [ 0.296642] NET: Registered protocol family 2 [ 0.297521] tcp_listen_portaddr_hash hash table entries: 512 (order: 0,6144 bytes) [ 0.297597] TCP established hash table entries: 4096 (order: 2, 16384bytes) [ 0.297685] TCP bind hash table entries: 4096 (order: 3, 32768 bytes) [ 0.297799] TCP: Hash tables configured (established 4096 bind 4096) [ 0.297961] UDP hash table entries: 256 (order: 1, 8192 bytes) [ 0.298026] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes) [ 0.298248] NET: Registeredprotocol family 1 [ 0.299900] workingset: timestamp_bits=30 max_order=17 bucket_order=0 [ 0.309592] Block layer SCSI generic (bsg) driver version 0.4 loaded(major 248) [ 0.309651] io scheduler noop registered [ 0.309677] io scheduler deadline registered [ 0.309903] io scheduler cfq registered (default) [ 0.309936] io scheduler mq-deadline registered [ 0.309963] io scheduler kyber registered [ 0.310562] stm32-u***phyc 5a006000.u***phyc: Linked as a consumer toregulator.1 [ 0.310656] stm32-u***phyc 5a006000.u***phyc: Linked as a consumer toregulator.2 [ 0.310720] stm32-u***phyc 5a006000.u***phyc: Dropping the link toregulator.2 [ 0.310794] stm32-u***phyc 5a006000.u***phyc: Dropping the link to regulator.1 [ 0.313333] stm32-dma 48000000.dma: STM32 DMA driver registered [ 0.314867] stm32-dma 48001000.dma: STM32 DMA driver registered [ 0.379643] STM32 USART driver initialized [ 0.380784] 40010000.serial: ttySTM0 at MMIO 0x40010000 (irq = 25,base_baud = 4000000) is a stm32-usart [ 1.190067] console [ttySTM0] enabled [ 1.194246] stm32-usart 40010000.serial: interrupt mode used for rx (nodma) [ 1.200821] stm32-usart 40010000.serial: interrupt mode used for tx (nodma) [ 1.227570] brd: module loaded [ 1.231380] random: fast init done [ 1.236551] loop: module loaded [ 1.240095] libphy: Fixed MDIO Bus: probed [ 1.241370] random: crng init done [ 1.242812] CAN device driver interface [ 1.251462] stm32-dwmac 5800a000.ethernet: PTP uses main clock [ 1.255878] stm32-dwmac 5800a000.ethernet: no reset control found [ 1.262077] stm32-dwmac 5800a000.ethernet: No phy clock provided... [ 1.279049] stm32-dwmac 5800a000.ethernet: User ID: 0x40, Synopsys ID:0x42 [ 1.284602] stm32-dwmac 5800a000.ethernet: DWMAC4/5 [ 1.289608] stm32-dwmac 5800a000.ethernet: DMA HW capability registersupported [ 1.296905] stm32-dwmac 5800a000.ethernet: RX Checksum Offload Enginesupported [ 1.304213] stm32-dwmac 5800a000.ethernet: TX Checksum insertion supported [ 1.311118] stm32-dwmac 5800a000.ethernet: Wake-Up On Lan supported [ 1.317399] stm32-dwmac 5800a000.ethernet: TSO supported [ 1.322695] stm32-dwmac 5800a000.ethernet: Enable RX Mitigation via HW WatchdogTimer [ 1.330571] stm32-dwmac 5800a000.ethernet: TSO feature enabled [ 1.336625] libphy: stmmac: probed [ 1.342884] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 1.348034] ehci-platform: EHCI generic platform driver [ 1.353675] ohci_hcd: USB 1.1'Open' Host Controller (OHCI) Driver [ 1.359449] ohci-platform: OHCI generic platform driver [ 1.367943] stm32_rtc 5c004000.rtc: rtc core: registered 5c004000.rtc asrtc0 [ 1.373877] stm32_rtc 5c004000.rtc: Date/Time must be initialized [ 1.379813] stm32_rtc 5c004000.rtc: registered rev:1.2 [ 1.385049] i2c /dev entries driver [ 1.408918] stm32f7-i2c 40012000.i2c: can't use DMA [ 1.415365] sii902x 0-0039: Failed to get supply 'iovcc': -517 [ 1.420073] stm32f7-i2c 40012000.i2c: STM32F7 I2C-0 bus adapter [ 1.446312] stm32f7-i2c 5c002000.i2c: can't use DMA [ 1.451399] typec_stu*** 1-0028: STUSB driver registered [ 1.456713] stpmic1 1-0033: PMIC Chip Version: 0x10 [ 1.465397] BUCK1: supplied by regulator-dummy [ 1.472184] BUCK2: supplied by regulator-dummy [ 1.478474] BUCK3: supplied by regulator-dummy [ 1.485123] BUCK4: supplied by regulator-dummy [ 1.491490] LDO1: supplied by v3v3 [ 1.498770] LDO2: supplied by regulator-dummy [ 1.505289] LDO3: supplied by vdd_ddr [ 1.511250] LDO4: supplied by regulator-dummy [ 1.515544] LDO5: supplied by regulator-dummy [ 1.522255] LDO6: supplied by v3v3 [ 1.527827] VREF_DDR: supplied by regulator-dummy [ 1.534082] BOOST: supplied by regulator-dummy [ 1.538045] VBUS_OTG: supplied by bst_out [ 1.542025] SW_OUT: supplied by bst_out [ 1.548767] input: pmic_onkey as/devices/platform/soc/5c002000.i2c/i2c-1/1-0033/5c002000.i2c:stpmic@33:onkey/input/input0 [ 1.558972] stm32f7-i2c 5c002000.i2c: STM32F7 I2C-1 bus adapter [ 1.567593] mmci-pl18x 58005000.sdmmc: Linked as a consumer to regulator.8 [ 1.573188] mmci-pl18x 58005000.sdmmc: mmc0: PL180 manf 53 rev2 at0x58005000 irq 56,0 (pio) [ 1.608468] sdhci: Secure Digital Host Controller Interface driver [ 1.614343] sdhci: Copyright(c) Pierre Ossman [ 1.617692] Synopsys Designware Multimedia Card Interface Driver [ 1.623929] sdhci-pltfm: SDHCI platform and OF driver helper [ 1.631765] u***core: registered new interface driver u***hid [ 1.635944] u***hid: USB HID core driver [ 1.640986] stm32-ipcc 4c001000.mailbox: ipcc rev:1.0 enabled, 6 chans,proc 0 [ 1.648968] stm32-rproc m4@0: wdg irq registered [ 1.652435] remoteproc remoteproc0: m4 is available [ 1.659164] vref: supplied by vdd [ 1.661188] stm32-adc-core 48003000.adc: Linked as a consumer toregulator.4 [ 1.668254] stm32-adc-core 48003000.adc: Linked as a consumer toregulator.7 [ 1.695182] mmc0: host does not support reading read-only switch, assumingwrite-enable [ 1.701853] iio iio:device2: Can't get offset/scale: -517 [ 1.710589] NET: Registered protocol family 10 [ 1.716822] mmc0: new high speed SDHC card at address 994b [ 1.722727] mmcblk0: mmc0:994b SU04G 3.69 GiB [ 1.731837] Segment Routing with IPv6 [ 1.734164] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 1.736047] mmcblk0: p1 p2 p3 p4 [ 1.740954] NET: Registered protocol family 17 [ 1.747828] can: controller area network core (rev 20170425 abi 9) [ 1.754048] NET: Registered protocol family 29 [ 1.758418] can: raw protocol (rev 20170425) [ 1.762643] can: broadcast manager protocol (rev 20170425 t) [ 1.768341] can: netlink gateway (rev 20170425) max_hops=1 [ 1.774092] ThumbEE CPU extension supported. [ 1.778119] Registering SWP/SWPB emulation handler [ 1.783845] stm32-u***phyc 5a006000.u***phyc: Linked as a consumer toregulator.1 [ 1.790273] stm32-u***phyc 5a006000.u***phyc: Linked as a consumer toregulator.2 [ 1.797581] stm32-u***phyc 5a006000.u***phyc: Linked as a consumer toregulator.12 [ 1.805471] stm32-u***phyc 5a006000.u***phyc: registered rev:1.0 [ 1.811947] dwc2 49000000.u***-otg: 49000000.u***-otg supply vu***_d notfound, using dummy regulator [ 1.819852] dwc2 49000000.u***-otg: Linked as a consumer to regulator.0 [ 1.826317] dwc2 49000000.u***-otg: 49000000.u***-otg supply vu***_a notfound, using dummy regulator [ 1.835431] dwc2 49000000.u***-otg: Configuration mismatch. dr_mode forcedto host [ 1.848324] dwc2 49000000.u***-otg: Linked as a consumer to regulator.3 [ 1.853940] dwc2 49000000.u***-otg: DWC OTG Controller [ 1.858563] dwc2 49000000.u***-otg: new USB bus registered, assigned busnumber 1 [ 1.865929] dwc2 49000000.u***-otg: irq 50, io mem 0x49000000 [ 1.872627] hub 1-0:1.0: USB hub found [ 1.875336] hub 1-0:1.0: 1 port detected [ 1.880114] ehci-platform 5800d000.u***h-ehci: EHCI Host Controller [ 1.885445] ehci-platform 5800d000.u***h-ehci: new USB bus registered,assigned bus number 2 [ 1.894146] ehci-platform 5800d000.u***h-ehci: irq 60, io mem 0x5800d000 [ 1.926222] ehci-platform 5800d000.u***h-ehci: USB 2.0 started, EHCI 1.00 [ 1.932463] hub 2-0:1.0: USB hub found [ 1.935277] hub 2-0:1.0: 2 ports detected [ 1.941764] sii902x 0-0039: Linked as a consumer to regulator.10 [ 1.946430] sii902x 0-0039: Linked as a consumer to regulator.14 [ 1.956240] i2c i2c-0: Added multiplexed i2c bus 2 [ 1.961712] [drm] ltdc hw version 0x00010300 - ready [ 1.965319] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.971903] [drm] Driver supports precise vblank timestamp query. [ 1.978418] [drm] Initialized stm 1.0.0 20170330 for5a001000.display-controller on minor 0 [ 1.986513] dwc2 49000000.u***-otg: Overcurrent change detected [ 1.992265] [drm] Cannot find any crtc or sizes [ 1.996911] dwc2 49000000.u***-otg: Overcurrent change detected [ 2.002567] stm32_rtc 5c004000.rtc: setting system clock to 2000-01-0100:18:32 UTC (946685912) [ 2.011629] [drm] Cannot find any crtc or sizes [ 2.012154] vdda: disabling [ 2.019046] ALSA device list: [ 2.021525] No soundcards ?? 2.031230] EXT4-fs (mmcblk0p4): INFO: recoveryrequired on readonly filesystem [ 2.037303] EXT4-fs (mmcblk0p4): write access will be enabled duringrecovery [ 2.165773] EXT4-fs (mmcblk0p4): recovery complete [ 2.181060] EXT4-fs (mmcblk0p4): mounted filesystem with ordered datamode. Opts: (null) [ 2.187841] VFS: Mounted root (ext4 filesystem) readonly on device 179:4. [ 2.196339] devtmpfs: mounted [ 2.199559] Freeing unused kernel memory: 1024K [ 2.202865] Run /***in/init as init process [ 2.306260] u*** 2-1: new high-speed USB device number 2 usingehci-platform [ 2.327892] EXT4-fs (mmcblk0p4): re-mounted. Opts: (null) Starting syslogd: OK Starting klogd: OK Initializing random number generator...done. Starting network: [ 2.507686] hub 2-1:1.0: USB hub found [ 2.510211] hub 2-1:1.0: 4 ports detected [ 2.574522] Generic PHY stmmac-0:00: attached PHY driver [Generic PHY](mii_bus:phy_addr=stmmac-0:00, irq=POLL) [ 2.594948] dwmac4: Master AXI performs any burst length [ 2.599050] stm32-dwmac 5800a000.ethernet eth0: No Safety Features supportfound [ 2.606348] stm32-dwmac 5800a000.ethernet eth0: IEEE 1588-2008 AdvancedTimestamp supported [ 2.614952] stm32-dwmac 5800a000.ethernet eth0: registered PTP clock [ 2.621995] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready OK Starting sshd: OK Welcome to Buildroot buildroot login: [ 3.677059] stm32-dwmac 5800a000.etherneteth0: Link is Up - 100Mbps/Full - flow control rx/tx [ 3.684327] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready 1. U-BOOT启动记录解析通过打印的第一条信息可以看出来，我们采用的U-BOOT是2020.04-rc4版本已经相当新了，编译时间为2020年4月2日，11：31：41，是我们最新编译的时间。 Model:STMicroelectronics STM32MP157A-DK1 Discovery Board RAM:DDR3-1066/888 bin G 1x4Gb 533MHz v1.45 Board:stm32mp1 in basic mode (st,stm32mp157a-dk1) Board:MB1272 Var1 Rev.C-01 DRAM: 512 MiB Clocks: - MPU : 650 MHz - MCU : 208.878 MHz - AXI : 266.500 MHz - PER : 24 MHz - DDR : 533 MHz NAND: 0 MiB MMC: STM32 SDMMC2: 0 Net: eth0: ethernet@5800a000 DK1板和DDR3内存等相关信息也打印出来了，说明我们的针对DK1板编译的U-BOOT还是比较适合的。 UBOOT从MMC0的分区#0启动，通过扫描分区找到了启动所需的相关信息，extlinux.conf、zImage，stm32157a-dk1.dtb，还有根分区挂载root=/dev/mmcblk0p4rootwait 2. Linux系统的调整看到上面的信息，说明我们的系统启动已经没有问题了，但是新启动的系统很多地方还是不能完全满足我们的需求，例如以太网等的配置等。 2.1. 系统提示符刚才生成的系统如果登录后我们可以看到，系统的提示符就一个字符“#”，你进到那一层目录，当前用户是谁都不知道。于是我们需要调整以下让他适合我们的使用。 打开/etc/profile文件，并按照如下方式添加修改后，保存。 HOSTNAME='/bin/hostname' PS1='[u@h W]#' export PS1 HOSTNAME #if [ "$PS1" ]; then # if [ "`id-u`" -eq 0 ]; then # export PS1='#' # else # export PS1='$' # fi #fi 当前系统中提供了vi编辑器，这个比较好用。 重新启动系统，登陆，这时提示符发生很大的变化，已经和我们熟悉的linux环境差不多了。 提示符变为： [root@buildroot ~]# 可以看到，当前用户和当前路径我们都可以显示出来了。 2.2. 以太网配置登录后我们执行 # ifconfig –a 来查看当前的系统配置的网络设备，可以看到系统的信息。 [root@buildroot~]#ifconfig -a eth0 Link encap:Ethernet HWaddr 00:80:E1:42:5F:28 inet addr:172.17.100.125 Bcast:0.0.0.0 Mask:255.255.0.0 inet6 addr: fe80::280:e1ff:fe42:5f28/64Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:87172 errors:0dropped:4003 overruns:0 frame:0 TX packets:86 errors:0 dropped:0overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6638661 (6.3 MiB) TX bytes:9025 (8.8 KiB) Interrupt:57 Base address:0x4000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0overruns:0 frame:0 TX packets:0 errors:0 dropped:0overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0overruns:0 frame:0 TX packets:0 errors:0 dropped:0overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) 信息显示我们有eth0这个以太网设备，但是他的ip地址可能不是我们想要的，我们需要他启动后自动设置为我们需要的地址。于是，我们需要调整以太网接口配置文件。 打开/etc/network/interfaces,增加 auto eth0 iface eth0 inet static address172.17.100.125 netmask255.255.0.0 gateway 172.17.64.2 其中的IP、子网掩码、网关地址根据需要修改就好了。 此时重新启动系统，在执行ifconfig，观察一下我们的ip地址调整结果。 2.3. SSH配置1）Sshd_config配置文件修改 这个配置应该是比较重要的，我们将来的操作都应该基于SSH+SFTP来完成。我们在系统创建的时候已经选择了openssh的功能模块，因此我们的系统已经具备的基本条件，只要重新配置一下sshd_config应该就可以了。 配置文件路径 /etc/ssh/sshd_config 配置中有几个地方我觉得比较关键： Port 22 AddressFamily any ListenAddress 0.0.0.0 PermitRootLogin yes PasswordAuthentication yes PermitEmptyPasswords yes 这几个配置表明端口号为22，允许root用户登录，允许无密码登录，将来开发过程中使用比较方便。开发完成了，在把选项关上，要求使用密码登录。 2）passwd文件修改 我们还要在passwd文件中增加一些ssh的相关设定。 文件路径： /etc/passwd 添加内容：在文件末尾增加 sshd:x:74:74:Privilege-separated 保存后退出。 3）更改var目录属性 修改var目录的属性，执行 # chown –R root:root /var 将var目录的组和用户全部改成root。 通过如上的三步更改后，重启系统，通过ssh终端软件登录STM32MP1-DK1成功。 系统配置完成，到目前位置，系统已经准备好了，剩下的是我们的应用测试了。 后附我的修改文件，放到相应的目录下可以解决问题。 下一贴开始我们由浅入深的测试过程了。
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