Blinky basic application not loading in uboot for the same load address as hello world

Neha_V — Fri, 17 Oct 2025 11:48:31 GMT

i have configured unused gpio in A53 dts like below
aliases {
led0 = &myled0;
};

leds {
compatible = "gpio-leds";
myled0: led_0 {
gpios = <&gpio4 20 GPIO_ACTIVE_LOW>;
};
};

During compilation time no issue but while loading in uboot it is hanging .I have used below commands for loading in uboot.
fatload mmc 0:1 0x40000000 zephyr.bin
dcache off; icache flush
go 0x40000000

the same commands works for fine for other applications but for blinky appliaction its hanging like this
U-Boot 2023.04-00001-gb88d03b44c1-dirty (Jan 07 2025 - 11:05:26 +0530)

CPU: i.MX8MP[8] rev1.1 1600 MHz (running at 1200 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 50C
Reset cause: POR
Model: iW-RainboW-G40M-i.MX8MP-OSM
Board: iWave iW-RainboW-G40M OSM
DRAM: 2 GiB
optee optee: OP-TEE api uid mismatch
Core: 257 devices, 35 uclasses, devicetree: separate
MMC: FSL_SDHC: 1, FSL_SDHC: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
SEC0: RNG instantiated
Board Info:
BSP Version : iW-PRGLZ-SC-01-R2.0-REL0.1-Linux6.6.3 Debian 12
SOM Version : iW-PRGLZ-AP-01-R2.0
CPU Unique ID : 0x0A0878007A3A417A
Carrier Board Version : iW-PRGJJ-AP-01-R1.0

switch to partitions #0, OK
mmc0(part 0) is current device
flash target is MMC:0
Net: eth0: ethernet@30be0000 [PRIME], eth1: ethernet@30bf0000
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot: 0
iWave-G40M>
iWave-G40M>
iWave-G40M>
iWave-G40M> ums 0 mmc 0
UMS: LUN 0, dev mmc 0, hwpart 0, sector 0x0, count 0x1d5a000
CTRL+C - Operation aborted
iWave-G40M> fatload mmc 0:1 0x40000000 zephyr.bin
93984 bytes read in 3 ms (29.9 MiB/s)
iWave-G40M> dcache off; icache flush
iWave-G40M> go 0x40000000
## Starting application at 0x40000000 ...

Re: Blinky basic application not loading in uboot for the same load address as hello world

Manuel_Salas — Tue, 21 Oct 2025 00:53:22 GMT

Hello @Neha_V

I hope you are doinf very well.

Just to clarify: Zephyr is not officially supported in this support channel, so we are unable to assist with issues related to Zephyr-based applications, including DTS configurations or runtime behavior on Zephyr.

If you are working with Zephyr on the i.MX8MP platform, I recommend reaching out to the Zephyr Project community or checking their GitHub discussions for more targeted support.

Let me know if you would like help with Linux, U-Boot, or anything else related to supported platforms!

Best regards,

Salas.

topic Blinky basic application not loading in uboot for the same load address as hello world in Zephyr Project

Blinky basic application not loading in uboot for the same load address as hello world

Re: Blinky basic application not loading in uboot for the same load address as hello world