Hi, To summarize: I am trying to configure my Beaglebone Black to boot from eMMC but it looks like the uEnvt.txt file is not read.
What I have done: 1) Build an image using buildroot (with beaglebone_defconfig). This creates MLO, zImage, u-boot.img and rootfs.tar. It also created an sdcard.img which boots just fine. 2) Boot from the SDCard and configure the eMMC using fdisk. I followed the instructions shown here <https://e2e.ti.com/support/processors/f/processors-forum/344528/u-boot-write-mlo-uboot-uimage-rootfs-on-to-emmc-mnand-of-am335x-evm-j5-echo-based-custom-board/1204926#1204926> . 3) Edit the uEnv.txt file to point to the eMMC. Contents of the file: *bootpart=1:1devtype=mmcbootdir=bootfile=zImagebootpartition=mmcblk1p2console=ttyS0,115200n8loadaddr=0x82000000fdtaddr=0x88000000set_mmc1=if test $board_name = A33515BB; then setenv bootpartition mmcblk1p2; fiset_bootargs=setenv bootargs console=${console} root=/dev/${bootpartition} rw rootfstype=ext4 rootwaituenvcmd=run set_mmc1; run set_bootargs;run loadimage;run loadfdt;printenv bootargs;bootz ${loadaddr} - ${fdtaddr}* The outcome is that uboot fails and end up in the prompt. If I type "boot" in the prompt the board starts up from the eMMC. *I do not know/understand what the difference in startup is between the board being powered and me typing in boot once it has failed.* The output on the serial port from power up: *Hit any key to stop autoboot: 0switch to partitions #0, OKmmc1(part 0) is current deviceScanning mmc 1:1...40817 bytes read in 4 ms (9.7 MiB/s)switch to partitions #0, OKmmc1(part 0) is current deviceSD/MMC found on device 1## Error: "bootcmd_nand0" not definedstarting USB...* It ends up at the uboot prompt. If I then type "boot" the OS loads: *=> bootswitch to partitions #0, OKmmc1(part 0) is current deviceSD/MMC found on device 1513 bytes read in 1 ms (501 KiB/s)Loaded env from uEnv.txtImporting environment from mmc1 ...Running uenvcmd ...## Error: "set_mmc1" not defined6090656 bytes read in 392 ms (14.8 MiB/s)40817 bytes read in 5 ms (7.8 MiB/s)bootargs=console=ttyS0,115200n8 root=/dev/mmcblk1p2 rw rootfstype=ext4 rootwait## Flattened Device Tree blob at 88000000 Booting using the fdt blob at 0x88000000 Loading Device Tree to 8fff3000, end 8fffff70 ... OKStarting kernel ...* I would appreciate any input, material to read etc. I guess I do not understand the exact process uboot follows to start the board... what am I missing? Thank you -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/0db7cf24-cf21-4342-a06c-d7bf648936bcn%40googlegroups.com.
