RT5350启动不了，一直循环。uboot启动日志如下：


U-Boot 1.1.3 (Oct  9 2013 - 21:17:42)

Board: Ralink APSoC DRAM:  32 MB
relocate_code Pointer at: 81fb4000
spi_wait_nsec: 42
spi device id: ef 40 17 0 0 (40170000)
find flash: W25Q64BV
raspi_read: from:30000 len:1000
.raspi_read: from:30000 len:1000
.============================================
Ralink UBoot Version: 3.6.0.0
--------------------------------------------
ASIC 5350_MP (Port5<->None)
DRAM_CONF_FROM: Boot-Strapping
DRAM_TYPE: SDRAM
DRAM_SIZE: 256 Mbits
DRAM_WIDTH: 16 bits
DRAM_TOTAL_WIDTH: 16 bits
TOTAL_MEMORY_SIZE: 32 MBytes
Flash component: SPI Flash
Date:Oct  9 2013  Time:21:17:42
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:128, ways:4, linesz:32 ,total:16384

##### The CPU freq = 360 MHZ ####
estimate memory size =32 Mbytes

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   7: Load Boot Loader code then write to Flash via Serial.
   9: Load Boot Loader code then write to Flash via TFTP.
0

3: System Boot system code via Flash.
## Booting image at bc050000 ...
raspi_read: from:50000 len:40
.   Image Name:   Linux Kernel Image
   Created:      2015-07-28   3:40:36 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    983651 Bytes = 960.6 kB
   Load Address: 80000000
   Entry Point:  80000000
raspi_read: from:50040 len:f0263
................   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
No initrd
## Transferring control to Linux (at address 80000000) ...
## Giving linux memsize in MB, 32

Starting kernel ...

[    0.000000] Linux version 3.10.36 (linux@ubuntu) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r40773) ) #6 Tue Jul 28 11:40:22 CST 2015
[    0.000000] SoC Type: Ralink RT5350 id:1 rev:3
[    0.000000] bootconsole [early0] enabled
[    0.000000] CPU revision is: 0001964c (MIPS 24KEc)
[    0.000000] MIPS: machine is HAME MPR-A2
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 02000000 @ 00000000 (usable)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x00000000-0x01ffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00000000-0x01ffffff]
[    0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 16kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 8128
[    0.000000] Kernel command line: console=ttyS1,57600 rootfstype=squashfs,jffs2
[    0.000000] PID hash table entries: 128 (order: -3, 512 bytes)
[    0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Writing ErrCtl register=00064841
[    0.000000] Readback ErrCtl register=00064841
[    0.000000] Memory: 29352k/32768k available (2135k kernel code, 3416k reserved, 549k data, 192k init, 0k highmem)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS:256
[    0.000000] CPU Clock: 360MHz
[    0.000000] Calibrating delay loop... 239.61 BogoMIPS (lpj=1198080)
[    0.070000] pid_max: default: 32768 minimum: 301
[    0.070000] Mount-cache hash table entries: 512
[    0.080000] pinctrl core: initialized pinctrl subsystem
[    0.090000] NET: Registered protocol family 16
[    0.110000] rt2880-pinmux pinctrl.1: invalid group "rgmii" for function "gpio"
[    0.120000] rt2880-pinmux pinctrl.1: invalid group "mdio" for function "gpio"
[    0.150000] bio: create slab <bio-0> at 0
[    0.160000] rt2880_gpio 10000600.gpio: registering 24 gpios
[    0.170000] rt2880_gpio 10000600.gpio: registering 24 irq handlers
[    0.180000] Switching to clocksource MIPS
[    0.190000] NET: Registered protocol family 2
[    0.200000] TCP established hash table entries: 512 (order: 0, 4096 bytes)
[    0.220000] TCP bind hash table entries: 512 (order: -1, 2048 bytes)
[    0.230000] TCP: Hash tables configured (established 512 bind 512)
[    0.240000] TCP: reno registered
[    0.250000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.260000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.270000] NET: Registered protocol family 1
[    0.280000] rt-timer 10000100.timer: maximum frequncy is 7324Hz
[    0.330000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.350000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    0.370000] msgmni has been set to 57
[    0.380000] io scheduler noop registered
[    0.380000] io scheduler deadline registered (default)
[    0.390000] rt2880-pinmux pinctrl.1: pin 7 is not set to gpio mux
[    0.410000] rt2880-pinmux pinctrl.1: request() failed for pin 7
[    0.420000] rt2880-pinmux pinctrl.1: pin-7 (pio:7) status -22
[    0.430000] rt2880-pinmux pinctrl.1: pin 12 is not set to gpio mux
[    0.440000] rt2880-pinmux pinctrl.1: request() failed for pin 12
[    0.450000] rt2880-pinmux pinctrl.1: pin-12 (pio:12) status -22
[    0.470000] gpio-export gpio_export.6: 0 gpio(s) exported
[    0.480000] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[    0.500000] 10000500.uart: ttyS0 at MMIO 0x10000500 (irq = 13) is a 16550A
[    0.510000] 10000c00.uartlite: ttyS1 at MMIO 0x10000c00 (irq = 20) is a 16550A
[    0.530000] console [ttyS1] enabled, bootconsole disabled
[    0.530000] console [ttyS1] enabled, bootconsole disabled
[    0.560000] m25p80 spi32766.0: s25fl064k (8192 Kbytes)
[    0.570000] 4 ofpart partitions found on MTD device spi32766.0
[    0.580000] Creating 4 MTD partitions on "spi32766.0":
[    0.590000] 0x000000000000-0x000000030000 : "u-boot"
[    0.600000] 0x000000030000-0x000000040000 : "u-boot-env"
[    0.620000] 0x000000040000-0x000000050000 : "factory"
[    0.630000] 0x000000050000-0x000000800000 : "firmware"
[    0.650000] 0x0000001402a3-0x000000800000 : "rootfs"
[    0.660000] mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    0.690000] mtd: device 4 (rootfs) set to be root filesystem
[    0.700000] mtd: partition "rootfs_data" created automatically, ofs=0x3c0000, len=0x440000
[    0.710000] 0x0000003c0000-0x000000800000 : "rootfs_data"
[    0.740000] eth0: done loading
[    0.750000] rt3xxx-usbphy ubsphy.3: loaded
[    0.760000] rt2880_wdt 10000120.watchdog: Initialized
[    0.770000] TCP: cubic registered
[    0.770000] NET: Registered protocol family 17
[    0.780000] 8021q: 802.1Q VLAN Support v1.8
[    0.820000] VFS: Mounted root (squashfs filesystem) readonly on device 31:4.
[    0.830000] Freeing unused kernel memory: 192K (802a0000 - 802d0000)
procd: Console is alive
procd: - watchdog -
procd: - preinit -
[    7.430000] rt305x-esw 10110000.esw: link changed 0x00
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[    9.010000] usbcore: registered new interface driver usbfs
[    9.020000] usbcore: registered new interface driver hub
[    9.030000] usbcore: registered new device driver usb
[    9.050000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    9.070000] ehci-platform: EHCI generic platform driver
[    9.280000] rt3xxx-usbphy ubsphy.3: remote usb device wakeup disabled
[    9.290000] rt3xxx-usbphy ubsphy.3: UTMI 16bit 30MHz
[    9.300000] ehci-platform 101c0000.ehci: EHCI Host Controller
[    9.310000] ehci-platform 101c0000.ehci: new USB bus registered, assigned bus number 1
[    9.330000] ehci-platform 101c0000.ehci: irq 26, io mem 0x101c0000
[    9.360000] ehci-platform 101c0000.ehci: USB 2.0 started, EHCI 1.00
[    9.370000] hub 1-0:1.0: USB hub found
[    9.380000] hub 1-0:1.0: 1 port detected
[    9.390000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    9.400000] ohci-platform 101c1000.ohci: Generic Platform OHCI Controller
[    9.420000] ohci-platform 101c1000.ohci: new USB bus registered, assigned bus number 2
[    9.430000] ohci-platform 101c1000.ohci: irq 26, io mem 0x101c1000
[    9.510000] hub 2-0:1.0: USB hub found
[    9.520000] hub 2-0:1.0: 1 port detected
[    9.530000] leds-gpio gpio-leds.4: pins are not configured from the driver
[    9.550000] rt2880-pinmux pinctrl.1: pin 20 is not set to gpio mux
[    9.560000] rt2880-pinmux pinctrl.1: request() failed for pin 20
[    9.570000] rt2880-pinmux pinctrl.1: pin-20 (pio:20) status -22
jffs2 is ready
[   10.340000] jffs2: notice: (286) jffs2_build_xattr_subsystem: complete building xattr subsystem, 1 of xdatum (0 unchecked, 0 orphan) and 5 of xref (0 dead, 0 orphan) found.
switching to jffs2
procd: - early -
procd: - watchdog -
procd: - ubus -
procd: - init -
Please press Enter to activate this console.
[   12.040000] jffs2: notice: (287) check_node_data: wrong data CRC in data node at 0x00420624: read 0x615041f0, calculated 0x5ace6da0.
Command failed: Not found
Command failed: Not found
[   17.110000] NET: Registered protocol family 10
[   17.130000] nf_conntrack version 0.5.0 (461 buckets, 1844 max)
[   17.160000] ip6_tables: (C) 2000-2006 Netfilter Core Team
[   17.210000] Linux video capture interface: v2.00
[   17.240000] usbcore: registered new interface driver cdc_acm
[   17.250000] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[   17.270000] Loading modules backported from Linux version master-2014-03-31-1-0-g5c109d2
[   17.290000] Backport generated by backports.git backports-20140221-0-g8e94650
[   17.320000] ip_tables: (C) 2000-2006 Netfilter Core Team
[   17.380000] usbcore: registered new interface driver usbserial
[   17.400000] usbcore: registered new interface driver usbserial_generic
[   17.410000] usbserial: USB Serial support registered for generic
[   17.440000] usbcore: registered new interface driver uvcvideo
[   17.450000] USB Video Class driver (1.1.1)
[   17.490000] xt_time: kernel timezone is -0000
[   17.500000] usbcore: registered new interface driver asix
[   17.520000] usbcore: registered new interface driver cdc_ether
[   17.570000] cfg80211: Calling CRDA to update world regulatory domain
[   17.580000] cfg80211: World regulatory domain updated:
[   17.590000] cfg80211:  DFS Master region: unset
[   17.600000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[   17.620000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   17.640000] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   17.650000] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[   17.670000] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[   17.690000] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[   17.700000] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[   17.820000] PPP generic driver version 2.4.2
[   17.830000] NET: Registered protocol family 24
[   17.850000] usbcore: registered new interface driver rndis_host
[   17.890000] usbcore: registered new interface driver option
[   17.900000] usbserial: USB Serial support registered for GSM modem (1-port)
[   17.950000] rt2800_wmac 10180000.wmac: failed to load eeprom property
[   17.960000] ieee80211 phy0: rt2x00lib_request_eeprom_file: Info - Loading EEPROM data from 'soc_wmac.eeprom'.
[   18.060000] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5350, rev 0500 detected
[   18.070000] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 5350 detected


U-Boot 1.1.3 (Oct  9 2013 - 21:17:42)

Board: Ralink APSoC DRAM:  32 MB
relocate_code Pointer at: 81fb4000
spi_wait_nsec: 42
spi device id: ef 40 17 0 0 (40170000)
find flash: W25Q64BV
raspi_read: from:30000 len:1000
.raspi_read: from:30000 len:1000
.============================================
Ralink UBoot Version: 3.6.0.0
--------------------------------------------
ASIC 5350_MP (Port5<->None)
DRAM_CONF_FROM: Boot-Strapping
DRAM_TYPE: SDRAM
DRAM_SIZE: 256 Mbits
DRAM_WIDTH: 16 bits
DRAM_TOTAL_WIDTH: 16 bits
TOTAL_MEMORY_SIZE: 32 MBytes
Flash component: SPI Flash
Date:Oct  9 2013  Time:21:17:42
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:128, ways:4, linesz:32 ,total:16384

##### The CPU freq = 360 MHZ ####
estimate memory size =32 Mbytes

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   7: Load Boot Loader code then write to Flash via Serial.
   9: Load Boot Loader code then write to Flash via TFTP.
0

3: System Boot system code via Flash.
## Booting image at bc050000 ...
raspi_read: from:50000 len:40
.   Image Name:   Linux Kernel Image
   Created:      2015-07-28   3:40:36 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    983651 Bytes = 960.6 kB
   Load Address: 80000000
   Entry Point:  80000000
raspi_read: from:50040 len:f0263
................   Verifying Checksum ... OK
   Uncompressing Kernel Image ...

U-Boot 1.1.3 (Oct  9 2013 - 21:17:42)

Board: Ralink APSoC DRAM:  32 MB
relocate_code Pointer at: 81fb4000
spi_wait_nsec: 42
spi device id: ef 40 17 0 0 (40170000)
find flash: W25Q64BV
raspi_read: from:30000 len:1000
.raspi_read: from:30000 len:1000
.============================================
Ralink UBoot Version: 3.6.0.0
--------------------------------------------
ASIC 5350_MP (Port5<->None)
DRAM_CONF_FROM: Boot-Strapping
DRAM_TYPE: SDRAM
DRAM_SIZE: 256 Mbits
DRAM_WIDTH: 16 bits
DRAM_TOTAL_WIDTH: 16 bits
TOTAL_MEMORY_SIZE: 32 MBytes
Flash component: SPI Flash
Date:Oct  9 2013  Time:21:17:42
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:128, ways:4, linesz:32 ,total:16384

##### The CPU freq = 360 MHZ ####
estimate memory size =32 Mbytes

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   7: Load Boot Loader code then write to Flash via Serial.
   9: Load Boot Loader code then write to Flash via TFTP.
0

3: System Boot system code via Flash.
## Booting image at bc050000 ...
raspi_read: from:50000 len:40
.   Image Name:   Linux Kernel Image
   Created:      2015-07-28   3:40:36 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    983651 Bytes = 960.6 kB
   Load Address: 80000000
   Entry Point:  80000000
raspi_read: from:50040 len:f0263
................   Verifying Checksum ... OK
   Uncompressing Kernel Image ...


刷固件都可以刷，刷完以后就一直重启！！刷了好几个固件都是一样的。
此帖出自小平头技术问答