Hi Nicolas,
On 4/4/21 3:36 PM, Fabio Estevam wrote:
Hi Nicolás,
Adding Giulio in case he has any ideas.
On Sun, Apr 4, 2021 at 10:14 AM Nicolás Muratore nico.m.muratore@gmail.com wrote:
Hi everybody, hope you are doing well, my name is Nicolás Muratore from Argentina, I'm doing I development under imxrt1020 EVK, I did test many "bare metal" programs to run from SD and those work ok on this EVK, right now I'm thinking to work with u-boot over imxrt1020 EVK, but I have problems to boot the u-boot from SD, I've followed the entire procedure from web page https://u-boot.readthedocs.io/en/stable/board/freescale/imxrt1020-evk.html:
I'm using Ubuntu 18.04 and gnu-arm-linux-gnueabi cross compiler.
- I have installed the u-boot package with all dependencies and
gcc-arm-linux-gnueabi compiler. 2) #sudo make mr proper 3) #sudo make imxrt1020-evk_defconfig 4) #sudo CROSS-COMPILE=arm-linu-gnueabi- make 5) it compiles without errors, I can see the SPL file and u-boot.img, and other related files, (I attached all output files to this email).. 6) Copy files to SD: #sudo dd if=SPL of= /dev/sdb bs=1k seek=1 conv=notrunc ; sync // This process copy "SPL" file on SD card with no errors. 7) Copy files to SD: #sudo dd if=u-boot.img of= /dev/sdb bs=1k seek=128 conv=notrunc ; sync // This process copy "u-boot.img" file on SD card with no errors.
After the copy process I put the SD on the imxrt1020 EVK, the SW7 in 0110 (I have tested the EVK many times using "bare metal" and it is ok).
I connect the USB console cable to the PC like I always do, but I can't see anything, it seems to be that the u-boot doesn't run.
Would you have any idea what is going on?
I've just entered debugging and two things came out: 1) in board/freescale/imxrt-1020-evk/imxrt1020-evk.c when calling spl_dram_init() there is some printf() inside that gets called, but that happens before calling preloader_console_init() that set serial up, so this is the reason why there is no output at all. 2) I've completely ignored(wrongly) having a timer and at that time u-boot allowed it getting a tick-count always at 0, so every delay called return immediatly with 0. This is not possible anymore and I need to finish writing gpt-timer driver I was writing.
So please let me finish that gpt-driver timer and I'll send patches to fix imxrt1020/50-evk.
I really appreciate your help, sorry to bother you, but I'm breaking my mind thinking why this doesn't run on my EVK.
Many thanks.
Best regards and happy easter! :-)