Problem with Readout Protection on STM32F4 Discovery

[z__it]

Posted on January 22, 2016 at 07:43

I cant connect my board because of readout protection is activated (Level 1) and I cant set it back to level 0 in Option Bytes menu on ST-Link Utility. How can I disable Readout Protection  please explain in an easy way.

thank you

[Tesla DeLorean]

Posted on January 22, 2016 at 14:50

Did you enable the readout protection? Or are you just having connectivity issues?

Try strapping BOOT[0] to VDD

Alternatively you could use the System Loader to walk the part out via the USART, I believe I've covered the technique here before.

The easy way is to provide a method in your own code to undo the protection. ie you code a method in and out

[z__it]

Posted on January 23, 2016 at 09:59

it's automatic level up to 1 and i dont know why.

i tried connect Boot0 to Vdd and Boot1 to GND, USART was connected, and used flash loader demon before but it wasn't work. it cant connect to the board. 

[Tesla DeLorean]

Posted on January 23, 2016 at 18:46

Ok, lets start with the basics. Make sure you are using a good USB cable, and that you have current versions of the drivers, ST-LINK Utilities, and firmware on the ST-LINK

Try connectivity on a different USB port, a different PC, a different cable

What version of Windows are you using here.