Problem Programming/Erasing TMS570 Flash (But Can Read It!)

Eray CANLI

Other Parts Discussed in Thread: UNIFLASH, TMS570LS1227

I have used TMS570LS1227 in a design. Connecting over JTAG via Blackhawk USB100v2, I can read memory contents (using UniFlash), but cannot erase or program flash (with TI CCS or UniFlash).

Output error message is as follows:

[12.10.2016 15:50:41] Status: CortexR4: Erasing Flash memory...

[12.10.2016 15:50:48] Status: CortexR4: Can't Run Target CPU: (Error -2063 @ 0x0) Unable to reset device. Power-cycle the board. If error persists, confirm configuration and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 6.0.407.3)

[12.10.2016 15:50:49] Status: CortexR4: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 6.0.407.3)

[12.10.2016 15:50:49] Status: CortexR4: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 6.0.407.3)

My JTAG schematics:

Thanks in advance...

over 9 years ago

0 Bob Crosby over 9 years ago

TI__Guru 72500 points

Does the device have a program running in it? Do you have the same problem with a blank device? Can you halt the device with CCS?

0 Eray CANLI over 9 years ago in reply to Bob Crosby

Intellectual 335 points

No. MCU is new/blank, not programmed yet.

Here is the content of memory:

I cannot start any debug session with CCS, so cannot stop it.

0 Bob Crosby over 9 years ago in reply to Eray CANLI

TI__Guru 72500 points

It is acting like it can read memory through the DAP, but the CPU is stuck in reset. Do you have a good high level on the nRST pin?

0 Eray CANLI over 9 years ago in reply to Bob Crosby

Intellectual 335 points

Yes, nRST pin is 3.3V all the time. It just goes low for about ~50us while trying to programme the flash.

0 Bob Crosby over 9 years ago in reply to Eray CANLI

TI__Guru 72500 points

Do you have a cable between the JTAG controller and the device? Is it possible that you are getting reflections on TCK or RTCK, or cross coupling between TMS or TDI and TCK or RTCK?