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TMS320F2811: C2000 microcontrollers forum

Part Number: TMS320F2811

My question is about the CSM of DSP2811.

Background:

1. We used CSM function to prevent unauthorized persons from obtaining or modifying the code which had been downloaded to DSP.

2. We changed the password, and only the developer knows the new password. 

3. We also designed a download version limit for the loading package to prevent someone counterfeit an advanced product by loading different FW to a cheaper product.

4. We write some very important values to OTP area to prevent someone modify them.

5. But we found a strange thing in the market, some merchants are selling our control boards, these boards are different from our formal control board, firstly, the passwords was changed to full "F", and secondly, the protect function of OTP didn't work. 

6. Any way, we want to lock the DSP permanently. That means once we download the loading package to DSP, anyone else can't access the DSP through JTAG, and can't download or upload forever.

Based on the background I want to ask a question, if I change the passwords to full "0" to lock the DSP permanently, Does the program still work? In other words, does locking the DSP affect the proper functioning of the code?

I have less experience on lock DSP, so I want to get a definite conclusion that Can I lock the DSP by writing "0" to 0x3F7FF8-0x3F8000, meanwhile, make sure my software in DSP works still properly.

This is a urgent case I want to get the reply from the engineer of TI ASAP. For the convenience of communication, can we communicate through email, my email is ruixuan.sun@cn.abb.comLooking forward to your reply, Thank you very much!