I have built a signed U-boot image following the steps from the NXP document AN4581. I was successful in the open configuration mode. As the signed image booted correctly without any HAB errors in open configuration mode.
Then I closed the device by blowing the final fuse SEC_CONFIG, and after this, I tried to flash an unsigned image to test the functionality, whether the image was forbidden to boot or not. The device fails to boot, which is a good sign.
But now the module is bricked. I am using i.mx7 MODULE FROM TORADEX and i use to flash my binaries via their Toradex easy installer application. This Easy installer application fails to work in my device which is in the closed configuration.
So how can I recover my module back, so that I can flash my signed image on to the board and test the positive case?
My board details :
Toradex Colibri i.MX7 D module 512Mb.
I need a way to recover my module back to the state so that I can flash my signed image and test the functionality.
Also, let me know how to test the unsigned image as well.