Not able to type commands in beaglebone black u-boot prompt

Hello, Greetings for the day,

We are trying to implement u-boot in beaglebone black using a 16GB sd card which contains the MLO file and uboot.img file(in boot partition). We have followed Mastering Embedded Linux Programming book by Chris Simmonds for configuring customised u-boot using Crosstool-NG. We have copied MLO and u-boot files in boot partition of SD card and connected it to beaglebone. After powerup beaglebone is booting but we are getting errors in the terminal as shown in the below text.

U-Boot SPL 2022.04-00023-g4237220b (May 15 2022 - 23:00:26 -0500)
Trying to boot from MMC1

U-Boot 2022.04-00023-g4237220b (May 15 2022 - 23:00:26 -0500)

CPU : AM335X-GP rev 2.0
Model: TI AM335x BeagleBone Black
DRAM: 512 MiB
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
Core: 150 devices, 14 uclasses, devicetree: separate
WDT: Started wdt@44e35000 with servicing (60s timeout)
Loading Environment from EXT4…

  • Unable to use mmc 0:1 for loading the env *
    Board: BeagleBone Black
    not set. Validating first E-fuse MAC
    BeagleBone Black:
    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: eth2: ethernet@4a100000, eth3: usb_ether
    Press SPACE to abort autoboot in 0 seconds

I think we are getting u-boot prompt but we are not able to type anything.

Please help us to resolve the issue.

Thanks & Regards,
Balaji TS