Is there actually any working solution to flash external SDRam in USB Mode?

[Exit0815]

Hello,

after reading a lot i am still confused.

I am looking for a solution to flash the internal and the external memory of an STM32F4 (for testing i am using the F469 Discovery Board).

There is no problem using the ST-Link on-board, but what about a solution for a mass-production board where no ST-Link is assembled and maybe the end-user needs to do an update?

Well, i am using this code to enter the bootloader for USB:

void goToBootloader(void)
{
	HAL_RCC_DeInit();
	SysTick->CTRL = SysTick->LOAD = SysTick->VAL = 0;
	__HAL_SYSCFG_REMAPMEMORY_SYSTEMFLASH();
 
	const uint32_t p = (*((uint32_t *) 0x1FFF0000));
	__set_MSP( p );
 
	void (*SysMemBootJump)(void);
	SysMemBootJump = (void (*)(void)) (*((uint32_t *) 0x1FFF0004));
	SysMemBootJump();
 
	while( 1 ) {}
}

So far so good, i can connect to the device with the CubeProgrammer.

And it seems that i can flash the internal memory but then failed at 0x9000000

 11:57:01 : USB speed : Full Speed (12MBit/s)
 11:57:01 : Manuf. ID : STMicroelectronics
 11:57:01 : Product ID : STM32 BOOTLOADER
 11:57:01 : SN : 336E335E3538
 11:57:01 : DFU protocol: 1.1
 11:57:01 : Board : --
 11:57:01 : Device ID : 0x0434
 11:57:01 : UPLOADING OPTION BYTES DATA ...
 11:57:01 : Bank : 0x00
 11:57:01 : Address : 0x1fffc000
 11:57:01 : Size : 16 Bytes
 11:57:01 : Bank : 0x01
 11:57:01 : Address : 0x1ffec008
 11:57:01 : Size : 4 Bytes
 11:57:01 : UPLOADING ...
 11:57:01 : Size : 2097152 Bytes
 11:57:01 : Address : 0x8000000
 11:57:01 : Read progress:
 11:57:04 : Data read successfully
 11:57:04 : Time elapsed during the read operation is: 00:00:03.465
 11:57:16 : Memory Programming ...
 11:57:16 : Opening and parsing file: STM32F469I-DISCO.hex
 11:57:16 : File : STM32F469I-DISCO.hex
 11:57:16 : Size : 9.63 MB 
 11:57:16 : Address : 0x08000000 
 11:57:16 : Erasing memory corresponding to segment 0:
 11:57:16 : Erasing internal memory sectors [0 6]
 11:57:16 : erasing sector 0000 @: 0x08000000 done
 11:57:16 : erasing sector 0001 @: 0x08004000 done
 11:57:17 : erasing sector 0002 @: 0x08008000 done
 11:57:17 : erasing sector 0003 @: 0x0800c000 done
 11:57:18 : erasing sector 0004 @: 0x08010000 done
 11:57:20 : erasing sector 0005 @: 0x08020000 done
 11:57:22 : erasing sector 0006 @: 0x08040000 done
 11:57:22 : Erasing memory corresponding to segment 1:
 11:57:22 : Not flash Memory : No erase done
 11:57:22 : Download in Progress:
 11:57:29 : Error: failed to download Segment[1]
 11:57:29 : Error: failed to download the File
 11:57:29 : RUNNING Program ... 
 11:57:29 : Address: : 0x08000000
 11:57:29 : Start operation achieved successfully
 11:57:29 : Warning: Connection to device 0x434 is lost
 11:57:29 : Disconnected from device.

I checked the External Loader for the 469-Disco Board.

A bit more detailed Log:

 11:59:36:170 : downloading data
 11:59:36:204 : Segment[0] downloaded successfully
 11:59:36:204 : Size : 9784556 Bytes
 11:59:36:204 : Address : 0x90000000 
 11:59:36:205 : setting the address pointer to address: 0x90000000
 11:59:36:732 : received memory address is wrong or unsupported
 11:59:36:732 : Error: failed to download Segment[1]
 11:59:36:733 : Error: failed to download the File
 11:59:36:752 : RUNNING Program ... 
 11:59:36:752 : Address: : 0x08000000
 11:59:36:752 : sending a clear status request
 11:59:36:753 : setting the address pointer to address: 0x08000000
 11:59:36:753 : sending a dfu end of download request
 11:59:36:753 : Start operation achieved successfully
 11:59:36:784 : Warning: Connection to device 0x434 is lost
 11:59:37:032 : Disconnected from device.

I hope someone can help me.

Thanks.

[MM..1]

Correct your subject flash external SDRam is mistake, Ram is simply erased on reboot.

And if you mean QSPI flash system DFU i mean dont suppoert flash externall. But you can write own bootloader for this or can use multi sequence load app 1 2 3 with code for QSPI and last 4 code app...

[Exit0815]

Thank you.

Unfortunately i can not edit my post / subject.

Important is that it would be possible. Somehow by using the USB-Connection (DFU).

Do I understand correctly that you can overflash the bootloader that starts DFU mode?

I don't quite understand the other way. multi sequence load app 1 2 3, that means that i program the internal Flash which contains a program part to activate (routing) data to the qspi sdram?

That means, a custom programmer, first is to upload an app 1 which will then start a function to get access to the qspi, right? Next step is to upload the new data to the qspi sdram?

[Tesla DeLorean]

>>qspi sdram

You keep using this, the part is a QSPI NOR Flash

[MM..1]

System bootloader cant be overflash, but you can place own bootloader in normal FLASH read about ISP.

And 1 2 3 method is based on size for write to external , for example you need write 9M maybe use compression 5M and internal flash is 2M then app 1 load part 1 and write unpack to QSPI on end jump back to DFU usw

2 contiues 3 ... Here you use normal system DFU and dont need write own bootloader...