DFU bootloader issues

[BKlus.1]

I am trying to use the built-in bootloader in DFU mode on STM32H743IIT.

1. I built my application and created a *.dfu file

2. The bootloader starts fine and my device enumerates properly as "STM Device in DFU Mode"

3. DfuSe Demo (v3.0.6) detects my device

4. I choose my DFU file and then click "Upgrade." The process appears to complete with message "Target 00: Upgrade successful!"

5. However, when I click "Verify," I get an error message "Matching not good. First difference at address 0x0801F068: File byte is 0x54. Read byte is 0xFF."

6. If I load my application using SWD, and then run bootloader using the same DFU file, it verifies OK.

7. With another (shorter) DFU file, everything works fine

Any ideas/suggestions?

Thanks!

[Tesla DeLorean]

DfuSe Demo is very old, suggest you use STM32 Cube Programmer in USB/DFU mode.

Also double check alignments, pretty sure the H7 will need 8-byte (64-bit) alignment. I wrote a tool many years ago called HEX2DFU. I might need to dig up a newer version.

https://community.st.com/s/question/0D53W000014yvvkSAA/how-to-generate-hex-file-in-stm32h750vb

https://community.st.com/s/question/0D50X00009XkeovSAB/dfu-fail-verify-8-byte-align-magic

[BKlus.1]

For some reason, STM32Cube Programmer can't find my device.

I actually tried using your HEX2DFU tool, but it gives me an error message:

F:\M595275-00>HEX2DFU.exe M595275-00.hex -out M595275-00.dfu
HEX2DFU 0.01 Copyright (C) 2013-2017 [e-mail]
All Rights Reserved, Non-Commercial Use Only
 
Loading M595275-00.hex...
02 Addr:0000 Type:04 Seg:00000000
:020000040800F2
Extended Linear 08000000
Basis : 08000000
02 Addr:0000 Type:04 Seg:08000000
:020000040801F1
Extended Linear 08010000
02 Addr:0000 Type:04 Seg:08010000
:020000040802F0
Extended Linear 08020000
02 Addr:0000 Type:04 Seg:08020000
:020000040803EF
Extended Linear 08030000
02 Addr:0000 Type:04 Seg:08030000
:020000043000CA
Extended Linear 30000000
ERROR: Hex exceeds buffer
Line 16008 : :1000000000000000000000000000000000000000F0
00 10
ERROR: HEX Checksum

By the way, would you be willing to permit use of your tool in a commercial environment?

Thanks!