TMS320F28P550SJ: Warning: failed unlocking device after reset. is there still hope to rescue it?

xiaoqing li

Part Number: TMS320F28P550SJ
Other Parts Discussed in Thread: UNIFLASH

Hi,

Now I can't program the chip by UNIFLASH and CCS, the error information is "failed unlocking device(zone 1&2) after reset". Previously, the programming is always good and the source code don't write any data into CSM OTP. The boot pin configuration is boot to flash. I try to read the CSM OTP at the address 0x78010, the result is all zeros. I had seen some discusstion in the e2e forums, but don't find convicing solution. Is there any method to rescue it, for example skip the CSM erase the flash or clear the PSWDLOCK to read the password in OTP. The project is very urgent now. Looking forward to a conclusion. Thanks!

Xiaoqing

13 days ago

0 xiaoqing li 10 days ago

Prodigy 30 points

up to experts!

0 Luke Jones 7 days ago in reply to xiaoqing li

TI__Mastermind 27850 points

Hi Xiaoquing,

So you get the failed unlocking device after reset error, but you're able to connect to CCS and view the memory browser contents at 0x78010? If this is still all 0s, could you send a screenshot of the entire memory browser starting at 0x78000 to confirm whether any CSM passwords have been programmed?

Thank you,

Luke

0 xiaoqing li 7 days ago in reply to Luke Jones

Prodigy 30 points

Hi Luke:

Yes, i can connect to CCS/UNIFLASH and view the memory contents, but the contents including CSM password are all 0s in the range of 0x78000-0x781FF. Sorry i hasn't the screenshot in hand.

Xiaoqing

0 xiaoqing li 8 hours ago

Prodigy 30 points

Hi, experts:

Have any analysis or advice? This should be a frequently asked troubling problem on C2000 MCU.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28P550SJ: Warning: failed unlocking device after reset. is there still hope to rescue it?