Error: Data mismatch found at address 0x08001504 (byte = 0xF7 instead of 0x7B) Error: Download verification failed

[chriskuku]

I've connected an STM32F407-G-DISC1 board to debug a DIY-MORE breakout board. The debuggee is connected via SWDCLK,SWDIO, NRST to the STLINK-SWD interface of the DISC1 board. Discovery jumpers are off, ST-LINK enabled.

I'm loading a blinky app but when starting (debug mode), I'm etting:

                      STM32CubeProgrammer v2.10.0                 

     -------------------------------------------------------------------

Log output file:  /tmp/STM32CubeProgrammer_LLTeBo.log

ST-LINK SN : 066CFF485153XXXXX7123124

ST-LINK FW : V2J39M27

Board      : STM32F4DISCOVERY

Voltage    : 2.91V

SWD freq   : 4000 KHz

Connect mode: Under Reset

Reset mode : Hardware reset

Device ID  : 0x413

Revision ID : Rev 2.0

Device name : STM32F405xx/F407xx/F415xx/F417xx

Flash size : 1 MBytes (default)

Device type : MCU

Device CPU : Cortex-M4

BL Version : --

Memory Programming ...

Opening and parsing file: ST-LINK_GDB_server_Nsg3oS.srec

 File         : ST-LINK_GDB_server_Nsg3oS.srec

 Size         : 7.93 KB

 Address      : 0x08000000

Erasing memory corresponding to segment 0:

Erasing internal memory sector 0

Download in Progress:

File download complete

Time elapsed during download operation: 00:00:00.412

Verifying ...

Error: Data mismatch found at address 0x08001504 (byte = 0xF7 instead of 0x7B)

Error: Download verification failed

[waclawek.jan]

Make sure the SWD connection is short (15cm max) and you have solid ground connection. Also make sure your board has good and stable power supply.

JW

[Tesla DeLorean]

Check the board is powered correctly, at expected voltage

Check voltage/capacitors present on VCAP pins

[chriskuku]

Thanks. Probably all measures in direction of checking the connection were helpful in the end. Changed cables, probe wires, shorter USB cable, externally powered USB-supply. It now works.