分类： 嵌入式
2014-07-04 11:12:06
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Using the appropriate Yocto-supplied toolchain and a current git pull of U-Boot:
$ export CROSS_COMPILE=arm-poky-linux-gnueabi- $ make distclean $ make am335x_boneblack_config $ make
then copy MLO and u-boot.img to a properly-formatted SD card and boot, obviously stopping in U-Boot.
Note that the current U-Boot has a specific configuration for the BBB which drops NAND support:
am335x_evm arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1,NAND ... snip ... am335x_boneblack arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1,EMMC_BOOT
? - alias for 'help' askenv - get environment variables from stdin base - print or set address offset bdinfo - print Board Info structure boot - boot default, i.e., run 'bootcmd' bootd - boot default, i.e., run 'bootcmd' bootm - boot application image from memory bootp - boot image via network using BOOTP/TFTP protocol bootz - boot Linux zImage image from memory cmp - memory compare coninfo - print console devices and information cp - memory copy crc32 - checksum calculation dfu - Device Firmware Upgrade dhcp - boot image via network using DHCP/TFTP protocol echo - echo args to console editenv - edit environment variable eeprom - EEPROM sub-system env - environment handling commands exit - exit script ext2load- load binary file from a Ext2 filesystem ext2ls - list files in a directory (default /) ext4load- load binary file from a Ext4 filesystem ext4ls - list files in a directory (default /) false - do nothing, unsuccessfully fatinfo - print information about filesystem fatload - load binary file from a dos filesystem fatls - list files in a directory (default /) fatwrite- write file into a dos filesystem fdt - flattened device tree utility commands go - start application at address 'addr' gpio - input/set/clear/toggle gpio pins help - print command description/usage i2c - I2C sub-system iminfo - print header information for application image imxtract- extract a part of a multi-image itest - return true/false on integer compare load - load binary file from a filesystem loadb - load binary file over serial line (kermit mode) loads - load S-Record file over serial line loadx - load binary file over serial line (xmodem mode) loady - load binary file over serial line (ymodem mode) loop - infinite loop on address range ls - list files in a directory (default /) md - memory display mm - memory modify (auto-incrementing address) mmc - MMC sub system mmcinfo - display MMC info mw - memory write (fill) nfs - boot image via network using NFS protocol nm - memory modify (constant address) ping - send ICMP ECHO_REQUEST to network host printenv- print environment variables reset - Perform RESET of the CPU run - run commands in an environment variable saveenv - save environment variables to persistent storage setenv - set environment variables sf - SPI flash sub-system showvar - print local hushshell variables sleep - delay execution for some time source - run script from memory spl - SPL configuration sspi - SPI utility command test - minimal test like /bin/sh tftpboot- boot image via network using TFTP protocol true - do nothing, successfully usb - USB sub-system usbboot - boot from USB device version - print monitor, compiler and linker version
In case it's useful, here's the default environment:
arch=arm
baudrate=115200
board=am335x
board_name=A335BNLT
board_rev=0A5C
boot_fdt=try
bootcmd=run findfdt; run mmcboot;setenv mmcdev 1; setenv bootpart 1:2; run mmcboot;run nandboot;
bootdelay=1
bootdir=/boot
bootenv=uEnv.txt
bootfile=uImage
bootpart=0:2
console=ttyO0,115200n8
cpu=armv7
dfu_alt_info_emmc=rawemmc mmc 0 3751936
dfu_alt_info_mmc=boot part 0 1;rootfs part 0 2;MLO fat 0 1;MLO.raw mmc 100 100;u-boot.img.raw mmc 300 400;spl-os-args.raw mmc 80 80;spl-os-image.raw mmc 900 2000;spl-os-args fat 0 1;spl-os-im1
dfu_alt_info_nand=SPL part 0 1;SPL.backup1 part 0 2;SPL.backup2 part 0 3;SPL.backup3 part 0 4;u-boot part 0 5;u-boot-spl-os part 0 6;kernel part 0 8;rootfs part 0 9
ethact=cpsw
ethaddr=90:59:af:4b:50:55
fdt_high=0xffffffff
fdtaddr=0x80F80000
fdtfile=undefined
findfdt=if test $board_name = A335BONE; then setenv fdtfile am335x-bone.dtb; fi; if test $board_name = A335BNLT; then setenv fdtfile am335x-boneblack.dtb; fi; if test $board_name = A33515BB;
importbootenv=echo Importing environment from mmc ...; env import -t $loadaddr $filesize
loadaddr=0x80200000
loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}
loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}
loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz
loaduimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
mmcargs=setenv bootargs console=${console} ${optargs} root=${mmcroot} rootfstype=${mmcrootfstype}
mmcboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootenv; then echo Loaded environment from ${bootenv};run importbootenv;fi;if test -n $uenvcmd;;
mmcdev=0
mmcloados=run mmcargs; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootm ${loadaddr} - ${fdtaddr}; else if test ${boot_fdt} = try; then bootm; else echo WAR;
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=ext4 rootwait
mtdids=nand0=omap2-nand.0
mtdparts=mtdparts=omap2-nand.0:128k(SPL),128k(SPL.backup1),128k(SPL.backup2),128k(SPL.backup3),1792k(u-boot),128k(u-boot-spl-os),128k(u-boot-env),5m(kernel),-(rootfs)
nandargs=setenv bootargs console=${console} ${optargs} root=${nandroot} rootfstype=${nandrootfstype}
nandboot=echo Booting from nand ...; run nandargs; nand read ${loadaddr} ${nandsrcaddr} ${nandimgsize}; bootm ${loadaddr}
nandimgsize=0x500000
nandroot=ubi0:rootfs rw ubi.mtd=7,2048
nandrootfstype=ubifs rootwait=1
nandsrcaddr=0x280000
netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp
netboot=echo Booting from network ...; setenv autoload no; dhcp; tftp ${loadaddr} ${bootfile}; tftp ${fdtaddr} ${fdtfile}; run netargs; bootm ${loadaddr} - ${fdtaddr}
nfsopts=nolock
ramargs=setenv bootargs console=${console} ${optargs} root=${ramroot} rootfstype=${ramrootfstype}
ramboot=echo Booting from ramdisk ...; run ramargs; bootm ${loadaddr} ${rdaddr} ${fdtaddr}
ramroot=/dev/ram0 rw ramdisk_size=65536 initrd=${rdaddr},64M
ramrootfstype=ext2
rdaddr=0x81000000
rootpath=/export/rootfs
soc=am33xx
spiargs=setenv bootargs console=${console} ${optargs} root=${spiroot} rootfstype=${spirootfstype}
spiboot=echo Booting from spi ...; run spiargs; sf probe ${spibusno}:0; sf read ${loadaddr} ${spisrcaddr} ${spiimgsize}; bootm ${loadaddr}
spibusno=0
spiimgsize=0x362000
spiroot=/dev/mtdblock4 rw
spirootfstype=jffs2
spisrcaddr=0xe0000
static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off
stderr=serial
stdin=serial
stdout=serial
usbnet_devaddr=90:59:af:4b:50:55
vendor=ti
ver=U-Boot 2013.10-rc1-00009-g3fb8588 (Aug 21 2013 - 11:04:36)
U-Boot 2013.10-rc3 (Sep 19 2013 - 15:12:10) arm-poky-linux-gnueabi-gcc (GCC) 4.7.2 GNU ld (GNU Binutils) 2.23.1.20121113
arch_number = 0x00000E05 boot_params = 0x80000100 DRAM bank = 0x00000000 -> start = 0x80000000 -> size = 0x20000000 eth0name = cpsw ethaddr = 90:59:af:4b:50:55 eth1name = usb_ether eth1addr = (not set) current eth = cpsw ip_addr =baudrate = 115200 bps TLB addr = 0x9FFF0000 relocaddr = 0x9FB62000 reloc off = 0x1F362000 irq_sp = 0x9FA41F38 sp start = 0x9FA41F28
List of available devices: serial 80000003 SIO stdin stdout stderr eserial5 00000003 .IO eserial4 00000003 .IO eserial3 00000003 .IO eserial2 00000003 .IO eserial1 00000003 .IO eserial0 00000003 .IO
OMAP SD/MMC: 0 [SD card] OMAP SD/MMC: 1 [eMMC]
Not sure what the point of that leading blank is on the second line, I think it's a formatting error.
In my case, for a 1G SD card:
U-Boot# mmc dev 0 mmc0 is current device U-Boot# mmcinfo Device: OMAP SD/MMC Manufacturer ID: 1b OEM: 534d Name: 00000 Tran Speed: 50000000 Rd Block Len: 512 SD version 2.0 High Capacity: No Capacity: 971.5 MiB Bus Width: 4-bit
And the 2G eMMC:
U-Boot# mmc dev 1 mmc1(part 0) is current device U-Boot# mmcinfo Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC02 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.41 High Capacity: No Capacity: 1.8 GiB Bus Width: 4-bit
For device 0 (again, my 1G SD card):
Partition Map for MMC device 0 -- Partition Type: DOS Part Start Sector Num Sectors UUID Type 1 63 144522 00000000-01 0c Boot 2 144585 1831410 00000000-02 83
For device 1 (eMMC):
Partition Map for MMC device 1 -- Partition Type: DOS Part Start Sector Num Sectors UUID Type 1 63 144522 00000000-01 0c Boot 2 144585 3598560 00000000-02 83
U-Boot# fatinfo mmc 0:1
Interface: MMC
Device 0: Vendor: Man 00001b Snr 142cd400 Rev: 11.1 Prod: 00000?
Type: Removable Hard Disk
Capacity: 971.5 MB = 0.9 GB (1989632 x 512)
Filesystem: FAT32 "fat "
U-Boot# fatinfo mmc 1:1
Interface: MMC
Device 1: Vendor: Man 0000fe Snr 4e877ac2 Rev: 3.10 Prod: MMC02G
Type: Removable Hard Disk
Capacity: 1832.0 MB = 1.7 GB (3751936 x 512)
Filesystem: FAT32 "BEAGLEBONE "
The SD card FAT partition:
U-Boot# fatls mmc 0:1 101552 mlo 363432 u-boot.img 2 file(s), 0 dir(s)
The eMMC FAT partition:
U-Boot# fatls mmc 1:1
99976 mlo
379428 u-boot.img
26 uenv.txt
app/
docs/
drivers/
41174 license.txt
292 readme.md
16827 start.htm
223 autorun.inf
56 id.txt
8 file(s), 3 dir(s)
A directory in the eMMC FAT partition:
U-Boot# fatls mmc 1:1 app
./
../
36088819 beaglebone-getting-started.zip
307 readme
2 file(s), 2 dir(s)
U-Boot# ext4ls mmc 0:24096 . 4096 .. 16384 lost+found
U-Boot# ext4ls mmc 1:24096 . 4096 .. 16384 lost+found 4096 bin 4096 sbin 4096 media 4096 home 4096 mnt 4096 usr 4096 boot 4096 etc 4096 tmp 4096 run 4096 var 4096 lib 4096 sys 4096 proc 4096 dev
Given that BBB LEDs are at GPIOs 53-56, turn the LEDs on and off:
# gpio {clear,set,toggle,input} {53,54,55,56}
(Return to BeagleBone Black page.)