i.MX ProcessorsのトピックHow to call standalone application in uboot?

How to call standalone application in uboot?

anshulkhare — Mon, 15 Jan 2018 14:49:29 GMT

I have created standalone application in uboot e.g"hello_world.bin" with load_addr 0x84000000 at ram

I am combining the above bin and uboot.imx in a single uboot.img

using "cat uboot.imx hello_world.pad > uboot.img"

The "uboot.img" image is loaded on board via sdcard. Now i want to run the above application.

I tried "go 0x84000000" command, it gives output

starting application at 0x84000000

undefined instruction

pc : [<84000138>]       lr : [<8ff6eb60>]
reloc pc : [<83cc1138>]       lr : [<8fc2fb60>]
sp : 8ef3cd60 ip : 8ef3cb01   fp : 8ef3e2b0
r10: 00000002 r9 : 8ef3ceb8   r8 : 8ffd8e78
r7 : 8ef3df30 r6 : 84000000   r5 : 00000002 r4 : 8ef3df34
r3 : 84000000 r2 : 8ef3df34   r1 : 8ef3df34 r0 : 00000000
Flags: nZCv IRQs off FIQs off Mode SVC_32
Resetting CPU ...

resetting ...

and restart the uboot.

PS: Reset cause: WDOG

Thanks

Re: How to call standalone application in uboot?

Carlos_Musich — Mon, 15 Jan 2018 21:05:07 GMT

Hi Anshul,

the process to attach the .bin to the uboot is correct but it will not set the application in the address in which you want. What is happening is that the application is loaded just after the uboot whichever that address is. So if you want to load your app in a specific address I recommend to use a FTP server.

Regards,
Carlos

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: How to call standalone application in uboot?

anshulkhare — Tue, 16 Jan 2018 06:36:58 GMT

"What is happening is that the application is loaded just after the uboot whichever that address is"

But i want to load it via sd card. Is it not possible? How can i find on which address the following application is loaded?