TMS570LS0714: Unable to reconnect to the device after HALCodeGen Setting PLL change

Sam

Part Number: TMS570LS0714
Other Parts Discussed in Thread: HALCOGEN

Dear TI Team,

before I applied the following changes in HalCoGen, I was able to programm the device without problems using CSS and the XDS110 Debug Probe.
However, I changed the PLL settings in HalCoGen from:

Afterwards, I programmed the device. After I tried to programm the device again I get the following error message:

CortexR4: Error connecting to the target: (Error -2062 @ 0x0) Unable to halt device. 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 9.2.0.00002)

I have not changed anything on my code in the meantime. Power reset did not help. Connection verification of the probe was successfully:

Do a test using 0xFFFFFFFF.
Scan tests: 1, skipped: 0, failed: 0
Do a test using 0x00000000.
Scan tests: 2, skipped: 0, failed: 0
Do a test using 0xFE03E0E2.
Scan tests: 3, skipped: 0, failed: 0
Do a test using 0x01FC1F1D.
Scan tests: 4, skipped: 0, failed: 0
Do a test using 0x5533CCAA.
Scan tests: 5, skipped: 0, failed: 0
Do a test using 0xAACC3355.
Scan tests: 6, skipped: 0, failed: 0
All of the values were scanned correctly.

The JTAG DR Integrity scan-test has succeede

It must have something to do with the changes I made in the PLL section. It seems like that the probe can not synchronise with the device anymore.
Does this problem seems familiar to you and could you please recommend me a solution and cause for the problem?

over 3 years ago

0 Sam over 3 years ago

Prodigy 50 points

I have probably a similar problem as described in:
https://e2e.ti.com/support/tools/code-composer-studio-group/ccs/f/code-composer-studio-forum/198113/2808-flash-erase-issue

However, the link for manually erasing the flash is down and the "SD Flash" tool seems not to be compatible with my uC.
Do you have an other idea or could explain how to manually erase the flash with CCS?

0 Sunil Oak over 3 years ago in reply to Sam

TI__Mastermind 49120 points

The problem is that the PLL configuration you have programmed is not correct. The max frequency supported by any clock domain on this part is 160MHz, as specified in the datasheet. You must correct that.

You have to then assert warm reset and quickly try to erase the part before the currently programmed code execution configures the PLL. You may have to try multiple times to get this to work.

0 Sam over 3 years ago in reply to Sunil Oak

Prodigy 50 points

Thank you for the fast answer! Could you please give me some additional information what you mean by warm reset and how I can execute it? I am using the PZ package. Do I need to put the nRST pin to GND and flash while it is on ground or do I need to flash it after it is back on the 3v3 level? From my understanding of your answer I need to set the nRST pin to GND (low) while the uC is powered and try to flash it afterwards as fast as possible with a correct setting and put it afterwards while the uc is still power to high level.