Error while executing OnTargetConnect(): Could not read register ST1: target is not connected

Jigar Patel67

Other Parts Discussed in Thread: TMS320F28335, UNIFLASH

I am using TMS320F28335. I am getting following error, when I try to download program.

C28xx: Unable to determine target status after 20 attempts
C28xx: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
C28xx: GEL: Error while executing OnTargetConnect(): Could not read register ST1: target is not connected
at (ST1&~(0x0100)) [f28335.gel:312]
at C28x_Mode() [f28335.gel:82]
at OnTargetConnect()

If I use Test Conection, it looks like it has valid connection.

following is message with Test Connection Message.

The JTAG DR Integrity scan-test has succeeded.

This morning, my power supply reset during programming. I suspect this is device lock issue. Is there any way to unlock device ? Is there anyway, I can avoid to replace chip.

Is there anyway to stop device lock, even if device reset during programming ?

Regards,

Jigar

over 10 years ago

0 raghu gundaala over 10 years ago

Intellectual 610 points

Hi jigar
Using UNIFLASH try to ERASE the code after erase try to load the code.

0 Gautam Iyer over 10 years ago

Guru 192875 points

Hi Jigar,

As you mentioned above that power got interrupted while flashing, if the same happened while erasing the device then there's no way you can get back/ unlock the device.

Regards,
Gautam

0 Jigar Patel67 over 10 years ago in reply to Gautam Iyer

Prodigy 80 points

I was not able to connect to target with multiple laptop and power cycle. I was getting same error message I mention above.

I tried UNIFLASH multiple time to erase flash, it was not working (All sector was selected to erase).

Finally I tried to erase only one sector at a time using UNIFLASH, it worked....Now I am able program/erase device using CCS.

Thank you for reply

0 Gautam Iyer over 10 years ago in reply to Jigar Patel67

Guru 192875 points

Sounds very odd! I hope you're able to debug the device now.

0 Jigar Patel67 over 10 years ago in reply to Gautam Iyer

Prodigy 80 points

Yes I am able to debug device. Does following message suggest device is locked ?

C28xx: Unable to determine target status after 20 attempts
C28xx: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
C28xx: GEL: Error while executing OnTargetConnect(): Could not read register ST1: target is not connected
at (ST1&~(0x0100)) [f28335.gel:312]
at C28x_Mode() [f28335.gel:82]
at OnTargetConnect()

0 Gautam Iyer over 10 years ago in reply to Jigar Patel67

Guru 192875 points

Are you still getting this error? This means "Not able to connect to device" as it seems to be busy.

0 Jigar Patel67 over 10 years ago in reply to Gautam Iyer

Prodigy 80 points

No I am not getting any error, It is working good for me.

I just want to figure out what happened.

0 Gautam Iyer over 10 years ago in reply to Jigar Patel67

Guru 192875 points

Goodluck!

Regards,
Gautam

C2000™︎ microcontrollers

C2000 microcontrollers forum

Error while executing OnTargetConnect(): Could not read register ST1: target is not connected