STM32F411CEU6 no longer blinks blue LED when connected, I broke it?

[notahardwareguy]

Am new to the STM32F boards. Have been using an STM32F103C8T6 with success using Arduino. Was attempting to get the F411CEU6 connected and "did a lot of things" to include things with the ST-Link. Now when I connect the 411 via USB the blue LED no longer lights/blinks. I tried "erasing" the board with the ST-Link as well as other things. Have I "trashed it"? The sheet says that I can't clear the boot loader but it no longer acts like the boot loader is there. How do I fix and return to board to its initial state? Sorry if this is a "stupid, novice question" but after having googled various versions of this question for hours, I could not locate anything close to an answer. Thank you for your assistance.

[Tesla DeLorean]

Presuming some F411 pill board

You erased the code that blinked the LED

The ROM based boot loader doesn't blink anything. With BOOT0 HIGH the USB should connect as a "STM32 BOOT DEVICE" or similar.

You'll have to download an application that makes the LED blink. This might be a Arduino, or similar, boot loader.

Find a tutorial for your board.

[notahardwareguy]

Thank you for responding...

[TDK]

The Arduino IDE uses its own bootloader which can be erased. Look up how to do that. There should be plenty of resources online to help you here.

https://www.sgbotic.com/index.php?dispatch=pages.view&page_id=49

Not many users on this forum use the Arduino IDE. Not saying you can't ask questions about it, but there may be a more resourceful forum somewhere in Arduino land.

[notahardwareguy]

Thank you for responding...

[notahardwareguy]

Thank you for responding. The reason I thought I might have ruined the device is (along with it no longer blinking the blue LED on connection to the PC) it NOW appears as a device on a com port "STM Serial" (on com 3) whereas before I did my load, it did not appear as a com device at all. It was listed under another type as "STM Bootloader" or some such. I suppose I can try loading the same bootloader that I installed onto the F103 via ST-Link. Again, thank you both for your replies.