我是新来的，对不起我的英语不好。
我有OLinuXino A13板。我致力于内核和启动事件。所以我尝试通过spiflash（在FEL模式下）启动OLinuxino-A13。我将开发板连接到PC（USB OTG）。我从计算机发送命令以写入spiflash。和我建立与usb-ttl的第二次连接不同。因此，我可以从PC上使用CuteCom程序打开书写板。然后我用sunxi-tools来写我的板子的spiflash。
我做到了：
我编译了内核，并创建了u-boot-sunxi-with-spl.bin文件。进入FEL模式后，我使用./sunxi-fel spiflash-write 0 /path/u-boot-sunxi-with-spl.bin将此文件写入了我的开发板。当我使用./sunxi-fel uboot /path/u-boot-sunxi-with-spl.bin从PC引导板时，板将启动，并且可以找到SD卡。结果：
U-Boot SPL 2019.04-rc1-00141-g63f7e3fca3 (Feb 19 2019 - 17:23:48 +0300)
DRAM: 512 MiB
CPU: 1008000000Hz, AXI/AHB/APB: 3/2/2
Trying to boot from FEL
U-Boot 2019.04-rc1-00141-g63f7e3fca3 (Feb 19 2019 - 17:23:48 +0300) Allwinner Technology
CPU: Allwinner A13 (SUN5I)
Model: Olimex A13-Olinuxino
I2C: ready
DRAM: 512 MiB
MMC: mmc@1c0f000: 0
Loading Environment from FAT... MMC: no card present
Setting up a 1024x768 vga console (overscan 0x0)
In: serial
Out: vga
Err: vga
Allwinner mUSB OTG (Peripheral)
Net:
Warning: usb_ether using MAC address from ROM
eth0: usb_ether
starting USB...
USB0: USB EHCI 1.00
USB1: USB OHCI 1.0
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 1 for devices... 1 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot: 2 <0x08><0x08><0x08> 1 <0x08><0x08><0x08> 0
MMC: no card present
Device 0: unknown device
但是如果我在（卡退出Fel模式）./sunxi-fel spiflash-write 0 /path/u-boot-sunxi-with-spl.bin命令之后重新启动板，则有所不同。结果：
U-Boot SPL 2019.04-rc1-00141-g63f7e3fca3 (Feb 19 2019 - 17:23:48 +0300)
DRAM: 512 MiB
CPU: 1008000000Hz, AXI/AHB/APB: 3/2/2
SPL: Unsupported Boot Device!
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###
A13-OLinuxino_defconfig文件：
CONFIG_ARM=y
CONFIG_ARCH_SUNXI=y
CONFIG_SPL=y
CONFIG_MACH_SUN5I=y
CONFIG_DRAM_CLK=408
CONFIG_DRAM_EMR1=0
CONFIG_MMC0_CD_PIN="PG0"
CONFIG_USB0_VBUS_DET="PG1"
CONFIG_USB1_VBUS_PIN="PG11"
CONFIG_AXP_GPIO=y
# CONFIG_VIDEO_HDMI is not set
CONFIG_VIDEO_VGA_VIA_LCD=y
CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH=y
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_NR_DRAM_BANKS=1
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_SPL_I2C_SUPPORT=y
CONFIG_CMD_DFU=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_USB_MASS_STORAGE=y
# CONFIG_SPL_DOS_PARTITION is not set
# CONFIG_SPL_PARTITION_UUIDS is not set
CONFIG_DEFAULT_DEVICE_TREE="sun5i-a13-olinuxino"
CONFIG_DFU_RAM=y
CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
CONFIG_AXP_ALDO3_VOLT=3300
CONFIG_CONS_INDEX=2
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_MUSB_GADGET=y
CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=yONFIG_AXP_ALDO3_VOLT=3300
CONFIG_CONS_INDEX=2
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_MUSB_GADGET=y
CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
我为超出此错误而苦苦挣扎，希望看到上面的结果。如何解决此错误？