No acknowledge on System I2C Bootloader @ B-U585I-IOT02A

[dbahr]

Hi, 

have a Discovery Board (B-U585I-IOT02A) and try to evaluate using the System Bootloader via I2C.

I have setup nSWBOOT0 = 1; nBOOT0 = 0 and BOOT0 = high.

I tried connecting with STLINK-V3SET connected to I2C2_SCL and I2C2_SDA plus GND. Using the STM32CubeProgrammer I cannot connect to the Bootloader via I2C(using 0x5A as an Address).

 

I am able to get acknowlege from other slaves that are on the same BUS using the STLINK-V3SET and also using a third Vendor I2C Analyzer. BUT no acknowledge on Addres 0x5A!

 

Is there anything on the DiscoveryBoard that is preventing the Bootloader from execution?

 

b.r.

 

David

[Foued_KH]

Hello @dbahr , 

The address given in AN2606 must be shifted to the right by 1 bit .
For more details, I suggest you this article : How to use STM32CubeProgrammer and the STLINK-V3SE... - STMicroelectronics Community

Foued

 

[dbahr]

Hi,

Thank you for the hint. Finally I had just connected to the wrong IOs. I made a mistake reading the Schematic. Now I can access the bootloader. 

 

b.r.

 

David