Unable to boot from SD

General Discussion
,
1

Hi,
I’m trying to run a RTEMS app on the beaglebone-black board from SD and I’m currently not sure what I’m doing wrong.

As for the RTEMS documentation, I set the uEnv.txt content to:

setenv bootdelay 5
uenvcmd=run boot
boot=fatload mmc 0 0x80800000 rtems-app.img ; fatload mmc 0 0x88000000 am335x-boneblack.dtb ; bootm 0x80800000 - 0x88000000

I have a fat32 formatted SD card with these files:
image

The board has already a Uboot image in the emmc memory that should boot my application.

When I insert the SD card and press the S1 Button, I get this output:


U-Boot SPL 2019.04-00002-g31a8ae0206 (May 13 2020 - 09:26:17 -0500)
Trying to boot from MMC2
Loading Environment from EXT4... 
** Unable to use mmc 0:1 for loading the env **


U-Boot 2019.04-00002-g31a8ae0206 (May 13 2020 - 09:26:17 -0500), Build: jenkins-github_Bootloader-Builder-139

CPU  : AM335X-GP rev 2.1
I2C:   ready
DRAM:  512 MiB
No match for driver 'omap_hsmmc'
No match for driver 'omap_hsmmc'
Some drivers were not found
Reset Source: Global external warm reset has occurred.
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Loading Environment from EXT4... 
** Unable to use mmc 0:1 for loading the env **
Board: BeagleBone Black
<ethaddr> not set. Validating first E-fuse MAC
BeagleBone Black:
BeagleBone: cape eeprom: i2c_probe: 0x54:
BeagleBone: cape eeprom: i2c_probe: 0x55:
BeagleBone: cape eeprom: i2c_probe: 0x56:
BeagleBone: cape eeprom: i2c_probe: 0x57:
Net:   eth0: MII MODE
cpsw, usb_ether
Press SPACE to abort autoboot in 0 seconds
board_name=[A335BNLT] ...
board_rev=[00C0] ...
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
51485 bytes read in 9 ms (5.5 MiB/s)
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc0 is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt ...
234 bytes read in 5 ms (44.9 KiB/s)
gpio: pin 55 (gpio 55) value is 1
Loaded environment from /uEnv.txt
Importing environment from mmc ...
Checking if uenvcmd is set ...
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd ...
69847 bytes read in 9 ms (7.4 MiB/s)
Checking if client_ip is set ...
Checking for: /boot.scr ...
Checking for: /boot/boot.scr ...
Checking for: /boot/uEnv.txt ...
** Invalid partition 2 **
** Invalid partition 3 **
** Invalid partition 4 **
** Invalid partition 5 **
** Invalid partition 6 **
** Invalid partition 7 **
switch to partitions #0, OK
mmc1(part 0) is current device
Scanning mmc 1:1...
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
69847 bytes read in 9 ms (7.4 MiB/s)
starting USB...
USB0:   Port not available.
cpsw Waiting for PHY auto negotiation to complete......... TIMEOUT !
using musb-hdrc, OUT ep1out IN ep1in STATUS ep2in
MAC f4:b8:98:87:66:c5
HOST MAC de:ad:be:af:00:00
RNDIS ready
musb-hdrc: peripheral reset irq lost!
high speed config #2: 2 mA, Ethernet Gadget, using RNDIS
USB RNDIS network up!
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5

After this the board just prints the BOOTP broadcast command.

Initially I thought it could be something related to u-boot not reading from the SD card, but in the u-boot prints I can see that it is loading the uEnv.txt that I copied to the SD card, so I’m now out of ideas on what am I doing wrong.

Kind regards,
Ailton

1 Like
2

I can’t find my BBB right now, but I tried to put an image on a SD card and boot on my BBGW.

I don’t need to press the user button. The BBGW boots from SD if it’s present and eMMC if it isn’t.

Can you try without pressing any buttons at all and see if it makes any difference?

Please note!
If I remember correctly, the AM335x samples the bootmode at power-on,
so you might need to remove power completely from your Beagle to make this work.

1 Like
3

When booting I just press the reset button without holding the S2 button I get the output above.

If I hold the S2 button when powering the board nothing happens, not even the u-boot. What I think it is happening here is, when I hold the S2 button on power on, the board tries to boot from SD, and since I don’t have the U-boot on the SD card, the boot fails. And when I boot without pressing the S2 button, the board boots from emmc where there’s a u-boot installation, and then the u-boot detects and reads the SD, where it finds my uEnv.txt that instruct u-boot to use my app image.
I’m actually not sure that this is what really happens, this is just what I think it is happening. What I don’t understand (in case my assumption is correct) is why nothing happens when u-boot runs uenvcmd

Loaded environment from /uEnv.txt
Importing environment from mmc ...
Checking if uenvcmd is set ...
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd ...
69847 bytes read in 9 ms (7.4 MiB/s)

And if it has anything to do with this

** Invalid partition 2 **
** Invalid partition 3 **
** Invalid partition 4 **
** Invalid partition 5 **
** Invalid partition 6 **
** Invalid partition 7 **
4

Here are my boot logs:

First one is eMMC only (no SD inserted):

U-Boot SPL 2019.04-g923f8b8 (Jan 02 2022 - 19:05:15 +0000)
Trying to boot from MMC2
Loading Environment from EXT4... Card did not respond to voltage select!


U-Boot 2019.04-g923f8b8 (Jan 02 2022 - 19:05:15 +0000)

CPU  : AM335X-GP rev 2.1
I2C:   ready
DRAM:  512 MiB
No match for driver 'omap_hsmmc'
No match for driver 'omap_hsmmc'
Some drivers were not found
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Loading Environment from EXT4... Card did not respond to voltage select!
Board: BeagleBone Black
<ethaddr> not set. Validating first E-fuse MAC
BeagleBone Black:
Model: SeeedStudio BeagleBone Green Wireless:
BeagleBone Cape EEPROM: no EEPROM at address: 0x54
BeagleBone Cape EEPROM: no EEPROM at address: 0x55
BeagleBone Cape EEPROM: no EEPROM at address: 0x56
BeagleBone Cape EEPROM: no EEPROM at address: 0x57
Net:   eth0: MII MODE
Could not get PHY for cpsw: addr 0
cpsw, usb_ether
Press SPACE to abort autoboot in 0 seconds
board_name=[A335BNLT] ...
board_rev=[GW1A] ...
Card did not respond to voltage select!
Card did not respond to voltage select!
Card did not respond to voltage select!
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
Card did not respond to voltage select!
Card did not respond to voltage select!
switch to partitions #0, OK
mmc1(part 0) is current device
Scanning mmc 1:1...
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc1(part 0) is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt ...
Checking for: /boot.scr ...
Checking for: /boot/boot.scr ...
Checking for: /boot/uEnv.txt ...
gpio: pin 55 (gpio 55) value is 1
2167 bytes read in 15 ms (140.6 KiB/s)
Loaded environment from /boot/uEnv.txt
Checking if uname_r is set in /boot/uEnv.txt...
gpio: pin 56 (gpio 56) value is 1
Running uname_boot ...
loading /boot/vmlinuz-4.19.94-ti-r74 ...
10179072 bytes read in 660 ms (14.7 MiB/s)
debug: [enable_uboot_overlays=1] ...
debug: [enable_uboot_cape_universal=1] ...
debug: [uboot_base_dtb_univ=am335x-bonegreen-wireless-uboot-univ.dtb] ...
uboot_overlays: [uboot_base_dtb=am335x-bonegreen-wireless-uboot-univ.dtb] ...
uboot_overlays: Switching too: dtb=am335x-bonegreen-wireless-uboot-univ.dtb ...
loading /boot/dtbs/4.19.94-ti-r74/am335x-bonegreen-wireless-uboot-univ.dtb ...
156321 bytes read in 54 ms (2.8 MiB/s)
uboot_overlays: [fdt_buffer=0x60000] ...
uboot_overlays: loading /boot/dtbs/4.19.94-ti-r74/overlays/BB-ADC-00A0.dtbo ...
645 bytes read in 104 ms (5.9 KiB/s)
uboot_overlays: loading /boot/dtbs/4.19.94-ti-r74/overlays/BB-BONE-eMMC1-01-00A0.dtbo ...
1605 bytes read in 112 ms (13.7 KiB/s)
uboot_overlays: loading /boot/dtbs/4.19.94-ti-r74/overlays/BB-BBGW-WL1835-00A0.dtbo ...
5089 bytes read in 108 ms (45.9 KiB/s)
uboot_overlays: loading /lib/firmware/AM335X-PRU-RPROC-4-19-TI-00A0.dtbo ...
3653 bytes read in 137 ms (25.4 KiB/s)
loading /boot/initrd.img-4.19.94-ti-r74 ...
7879093 bytes read in 519 ms (14.5 MiB/s)
debug: [console=ttyS0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet] ...
debug: [bootz 0x82000000 0x88080000:7839b5 88000000] ...
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Loading Ramdisk to 8f87c000, end 8ffff9b5 ... OK
   Loading Device Tree to 8f7f2000, end 8f87bfff ... OK

Starting kernel ...

and here is the second boot, this time with an SD inserted:

U-Boot SPL 2019.04-g923f8b8 (Jan 02 2022 - 19:05:15 +0000)
Trying to boot from MMC2
Loading Environment from EXT4... ** File not found /boot/uboot.env **

** Unable to read "/boot/uboot.env" from mmc0:1 **


U-Boot 2019.04-g923f8b8 (Jan 02 2022 - 19:05:15 +0000)

CPU  : AM335X-GP rev 2.1
I2C:   ready
DRAM:  512 MiB
No match for driver 'omap_hsmmc'
No match for driver 'omap_hsmmc'
Some drivers were not found
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Loading Environment from EXT4... ** File not found /boot/uboot.env **

** Unable to read "/boot/uboot.env" from mmc0:1 **
Board: BeagleBone Black
<ethaddr> not set. Validating first E-fuse MAC
BeagleBone Black:
Model: SeeedStudio BeagleBone Green Wireless:
BeagleBone Cape EEPROM: no EEPROM at address: 0x54
BeagleBone Cape EEPROM: no EEPROM at address: 0x55
BeagleBone Cape EEPROM: no EEPROM at address: 0x56
BeagleBone Cape EEPROM: no EEPROM at address: 0x57
Net:   eth0: MII MODE
Could not get PHY for cpsw: addr 0
cpsw, usb_ether
Press SPACE to abort autoboot in 0 seconds
board_name=[A335BNLT] ...
board_rev=[GW1A] ...
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc0 is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt ...
Checking for: /boot.scr ...
Checking for: /boot/boot.scr ...
Checking for: /boot/uEnv.txt ...
gpio: pin 55 (gpio 55) value is 1
2062 bytes read in 48 ms (41 KiB/s)
Loaded environment from /boot/uEnv.txt
Checking if uname_r is set in /boot/uEnv.txt...
gpio: pin 56 (gpio 56) value is 1
Running uname_boot ...
loading /boot/vmlinuz-4.19.94-ti-r42 ...
10095592 bytes read in 674 ms (14.3 MiB/s)
debug: [enable_uboot_overlays=1] ...
debug: [enable_uboot_cape_universal=1] ...
debug: [uboot_base_dtb_univ=am335x-bonegreen-wireless-uboot-univ.dtb] ...
uboot_overlays: [uboot_base_dtb=am335x-bonegreen-wireless-uboot-univ.dtb] ...
uboot_overlays: Switching too: dtb=am335x-bonegreen-wireless-uboot-univ.dtb ...
loading /boot/dtbs/4.19.94-ti-r42/am335x-bonegreen-wireless-uboot-univ.dtb ...
156845 bytes read in 174 ms (879.9 KiB/s)
uboot_overlays: [fdt_buffer=0x60000] ...
uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ...
867 bytes read in 257 ms (2.9 KiB/s)
uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ...
1584 bytes read in 523 ms (2.9 KiB/s)
uboot_overlays: loading /lib/firmware/BB-BBGW-WL1835-00A0.dtbo ...
4785 bytes read in 821 ms (4.9 KiB/s)
uboot_overlays: loading /lib/firmware/AM335X-PRU-RPROC-4-19-TI-00A0.dtbo ...
3801 bytes read in 713 ms (4.9 KiB/s)
loading /boot/initrd.img-4.19.94-ti-r42 ...
6589689 bytes read in 457 ms (13.8 MiB/s)
debug: [console=ttyS0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet] ...
debug: [bootz 0x82000000 0x88080000:648cf9 88000000] ...
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Loading Ramdisk to 8f9b7000, end 8ffffcf9 ... OK
   Loading Device Tree to 8f92c000, end 8f9b6fff ... OK

Starting kernel ...

Notice how the 2 kernels are different because the one on the eMMC is updated
when compared to the SD Card one.

On both boots, I did not have to press any of the buttons.

On your log I can see that the U-Boot I have is newer than yours but I’m pretty sure
it’s trying to boot from your SD Card. Strange!

Can you try to just make an SD Card from the most resent image and try booting that?
You can try to see if pushing any buttons makes any kind of difference.

Again, the bootmode is set on power-on, so it’s imperative that you hold down the button
as you insert the USB cable (I assume that’s how you power your BBB) into your computer.

1 Like
5

Somehow while trying your suggestion, I used this tutorial to format the SD card and create the partitions, and now the boot works.

U-Boot 2019.04-00002-g31a8ae0206 (May 13 2020 - 09:26:17 -0500), Build: jenkins-github_Bootloader-Builder-139

CPU  : AM335X-GP rev 2.1
I2C:   ready
DRAM:  512 MiB
No match for driver 'omap_hsmmc'
No match for driver 'omap_hsmmc'
Some drivers were not found
Reset Source: Global external warm reset has occurred.
Reset Source: Global warm SW reset has occurred.
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Loading Environment from EXT4... 
** Unable to use mmc 0:1 for loading the env **
Board: BeagleBone Black
<ethaddr> not set. Validating first E-fuse MAC
BeagleBone Black:
BeagleBone: cape eeprom: i2c_probe: 0x54:
BeagleBone: cape eeprom: i2c_probe: 0x55:
BeagleBone: cape eeprom: i2c_probe: 0x56:
BeagleBone: cape eeprom: i2c_probe: 0x57:
Net:   eth0: MII MODE
cpsw, usb_ether
Press SPACE to abort autoboot in 0 seconds
board_name=[A335BNLT] ...
board_rev=[00C0] ...
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
51485 bytes read in 8 ms (6.1 MiB/s)
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc0 is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt ...
160 bytes read in 5 ms (31.3 KiB/s)
gpio: pin 55 (gpio 55) value is 1
Loaded environment from /uEnv.txt
Importing environment from mmc ...
Checking if uenvcmd is set ...
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd ...
72346 bytes read in 9 ms (7.7 MiB/s)
51485 bytes read in 8 ms (6.1 MiB/s)
## Booting kernel from Legacy Image at 80800000 ...
   Image Name:   RTEMS
   Created:      2024-05-28  12:00:09 UTC
   Image Type:   ARM Linux Kernel Image (gzip compressed)
   Data Size:    72282 Bytes = 70.6 KiB
   Load Address: 80000000
   Entry Point:  80000000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Uncompressing Kernel Image ... OK
   Loading Device Tree to 8fff0000, end 8ffff91c ... OK

Starting kernel ...


RTEMS Beagleboard: am335x-based
        ARM Debug: 0x4b141000

Hello World

[ RTEMS shutdown ]
RTEMS version: 6.0.0
RTEMS tools: 13.2.1 20240412 (RTEMS 6, RSB no-repo, Newlib 176b19f)
executing thread ID: 0x0a010001
executing thread name: UI1

Another thing I did, was changing the size of the FAT32 partition, before I had 32GB and now I reduced it to 2GB.

6

That’s awesome! :smiling_face: :+1:

Good luck with your project!

1 Like