Forgive me intrusion to this very specific area I am not a microcontroller programmer and hope not to boring you with my problem.
I have a ereader device with Freescale i.MX508 cpu. After unfortunate upgrading my device hangs at the end of the booting process. I can hard reset it so it reboots again, but it does not offers anymore access to internal storage for PC.
I don't want to hack it, but I need to access the internal memory so I can copy the right firware there to try upgrading again.
... after some googling I got the idea:
1) get into specific BOOT_MODE for USB downloader
(Source IMX50CEC.pdf, Page 16)
1a) There seems to be no Magic Key like for other devices or I did not found it
1b) But there are "Boot Mode Points" which maybe "shortened"
2) Installing the XP Drivers. Maybe I can use the i.MX53/51 driver.
3) Getting access to device through MfgTool and enabling "diags mode" to get access to Internal Storage
4)Copying the firmware
So this was the idea. I don't know if it works. Would like to hear your opinions if there
I have trouble to get into USB Downloader mode because I have no idea how I should proceed with the Boot Mode Points.
Maybe somebody can give me a hint?