u-boot 2022-07 on STM32F746G-DISCO

[Patrice CHOTARD]

Hi Waldemar

On 9/19/22 13:48, Waldemar Brodkorb wrote:
> Hi again,
> 
> Waldemar Brodkorb wrote,
> 
>> Hi,
>>
>> I am trying to run u-boot on a STM32F746G-DISCO device.
>> I am configuring u-boot with stm32f746-disco_spl_defconfig.
>>
>> But nothing happens on the LCD nor on the serial console.
>> I use screen /dev/ttyACM0 115200 under Linux to connect.
> 
> It seems my USB port on my laptop was buggy, after reboot I get
> following output via serial console:
> 
> U-Boot SPL 2022.07 (Sep 19 2022 - 13:20:08 +0200)
> Trying to boot from XIP
> 
> 
> U-Boot 2022.07 (Sep 19 2022 - 13:20:08 +0200)
> 
> Model: STMicroelectronics STM32F746-DISCO board
> DRAM:  8 MiB
> Hard fault
> pc : 080087d6    lr : c05aa775    xPSR : a1000000
> r12 : 00000010   r3 : 080087c1    r2 : 0805344d
> r1 : 08008001    r0 : c05aa000
> Resetting CPU ...
> 
> resetting ...
> 
> I get a Hard fault. I then tried an older version of u-boot using
> the information from https://github.com/fdu/STM32F746G-disco_Buildroot
> as a hint. With U-Boot 2018.11 I get a working binary (I had to
> disable Falcon mode):
> 
> U-Boot SPL 2018.11 (Sep 19 2022 - 13:41:50 +0200)
> Trying to boot from XIP
> 
> 
> U-Boot 2018.11 (Sep 19 2022 - 13:41:50 +0200)
> 
> Model: STMicroelectronics STM32F746-DISCO board
> DRAM:  8 MiB
> Flash: 1 MiB
> MMC:   sdio at 40012c00: 0
> In:    serial
> Out:   serial
> Err:   serial
> usr button is at LOW LEVEL
> Net:   
> Warning: ethernet at 40028000 (eth0) using random MAC address -
> fe:f8:94:5f:5e:26
> eth0: ethernet at 40028000
> Hit SPACE in 3 seconds to stop autoboot.
> Wrong Image Format for bootm command
> ERROR: can't get kernel image!
> U-Boot > 
> 
> Seems like a regression to me.
> 
> best regards
>  Waldemar

There are several issues with SPL with STM32F7 based boards. 
I am currently working on it.
A series will be submitted very soon 

Patrice