TMS570LS0432: How to make lockstep errors

whong zhao

Genius 4080 points

Part Number: TMS570LS0432

Hello

I want to test my code ，about the esm interrupt.

please how to make lockstep errors.so my program can go into the esm interrupt

thank you

over 2 years ago

0 QJ Wang over 2 years ago

TI__Guru**** 186256 points

Hi Whong,

The CCM4 module supports error forcing mode. Writing 0x9 to MKEY will enable the error forcing mode.

The error forcing mode is similar to the compare mismatch. This test will generate "CCM-R4F compare error or CPU-lockstep (ESM 2.2)" error and "CCM-R4F self-test (ESM 1.31)" error.

0 whong zhao over 2 years ago in reply to QJ Wang

Genius 4080 points

Hello

I write the code “ ccmr4fREG1->_CCMKEYR=0x09”,but the register dont change value. always is 0;

0 QJ Wang over 2 years ago in reply to whong zhao

TI__Guru**** 186256 points

Hi,

The error forcing mode (0x9) takes one cycle to complete. After that, the mode is automatically switched to lockstep mode (0x0).

After the error forcing is done, the error flag in ESM should be set.

0 whong zhao over 2 years ago in reply to QJ Wang

Genius 4080 points

I have set the esm interrupt ，and esm 31 interrupt，but when the program run the “CCMKEYR=0x9U”，the program can't go into the

esm interrupt. why?

0 whong zhao over 2 years ago in reply to QJ Wang

Genius 4080 points

The CCM test dont with the debug mode？

+1 QJ Wang over 2 years ago in reply to whong zhao

TI__Guru**** 186256 points

1. ESM interrupt for group 1 should be enabled

2. Enable the ESM low interrupt:

3. Enable IRQ interrupt:

_enable_IRQ();

4. then ccmr5REG->CCMKEYR1 = 0x09; will generate ESM interrupt

0 whong zhao over 2 years ago in reply to QJ Wang

Genius 4080 points

Hello

I am using Debug mode with downloader. the interrupt dont response.

but when I disconnect the downlodaer,the cpu powerdown again .the program is endless loop.because I'm in an endless loop of interrupting content.

Does CCM test have anything to do with downloader and mode?

I see some links in this forum directions

https://e2e.ti.com/support/microcontrollers/hercules-safety-microcontrollers-group/hercules/f/hercules-safety-microcontrollers-forum/628245/ccs-rm41l232-by-sl_selftest_ccmr4f-ccm-selftest-failed?tisearch=e2e-sitesearch&keymatch=CCM#

why you can test

+1 QJ Wang over 2 years ago in reply to whong zhao

TI__Guru**** 186256 points

Hi Whong,

CCM diagnostic test should not be performed in debug mode.

Certain debug operations place the CPU in a halting debug state where the code execution is halted. Because halting debug events are asynchronous, there is a possibility for the debug requests to cause loss of lockstep. CCM-R5F will disable all functional diagnostics upon detection of halting debug requests. Core compare error will not be generated and flags will not update. A CPU reset is needed to ensure the CPUs are again in lockstep and will also re-enable the CCM-R5F.

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TMS570LS0432: How to make lockstep errors