2 replies to this topic

[knutolai]

Can STDFU/DFUSE erase/ruin the embedded bootloader when erasing the MCU firmware?

 

Im using a STM32F2xx MCU with a embedded bootloader. The way I have understood it, STDFU is able to erase the content of the MCU flash memory, letting you for instance remove such things as the .NET firmware of a Netduino board.

 

Is there any code accompanying a on-chip bootloader necessary for it to function? Also, where would this code be stored? Is there a risk such code would be erased when erasing the board, or overwritten when flashing binaries onto the board (say for instance if the program is great in size)?

 

[Chris Walker]

Hi knutolai, The ST's embedded bootloader is stored in a separate, non-erasable ROM. Feel free to erase and reprogram your Netduino; there is no risk of erasing the chip's core bootloader. Chris

[knutolai]

Ok good to know. It also makes a lot of sense I guess. 

 

DFUSE Demonstration is acting strangely. I follow the steps for firmware upgrading and when I hit the "upgrade" key, having chosen the .dfu file I wish to flash onto the board, the upgrade process takes 0 seconds and I get a error message when leaving .dfu mode. The program I attempted to upload has no effect on the board. 

 

Is this a safe indicator that the .dfu file I attempted to upload is incompatible or unrecognizable by the board? 

 

EDIT: This is being discussed in a separate thread (http://forums.netdui...e-troubleshoot/)