Compiler/TMS570LC4357: TMS570LC43x SPNU563A - Parity Compare Logic in SCM

JC Chasez

Part Number: TMS570LC4357

Tool/software: TI C/C++ Compiler

Hi,

I read this post https://e2e.ti.com/support/microcontrollers/hercules/f/312/t/382385?tisearch=e2e-sitesearch&keymatch=scmcntrl

I have a follow on question to this post. The post says to clear parity error flags in DMA, L2FMC and L2RAMW. When I set SCMCNTRL to 0x0A050505 to start the transaction parity test, I do not see any parity error being set in L2FMC. I was expecting to see parity error being set on FEDAC_PASTATUS, FEDAC_PBSTATUS, L2FMCPOM_POMFLG registers, but they are all 0x0 in Code Composer. Is this expected?

Also, for L2RAMW, I only see RAMERRSTATUS CPEOI bit being set. Should I expect bit MSACP, PACE to be set too?

Thanks!

over 5 years ago

0 QJ Wang over 5 years ago

TI__Guru**** 197306 points

Hello JC,

The privilege mode is required to perform the parity test.

0 JC Chasez over 5 years ago in reply to QJ Wang

Prodigy 80 points

Hi,

I was reading up on the different modes. The code below sets to system mode which is a privilege mode and I didn't see any update to the SPSR register being set to 0x13 or 10011. Is it true that I must do a SuperVisor Call (SVC) in order modify bits in SPSR? Is there another way to get into privilege mode? What am I missing here?

asm(" mrs r0, spsr");
asm(" bic r0, r0, #0x1F");
asm(" orr r0, r0, #0x1F");
asm(" msr spsr, r0");

Thanks!

0 JC Chasez over 5 years ago in reply to JC Chasez

Prodigy 80 points

Hi,

I got it into privilege mode, but I do not see the parity errors being set in L2FMC. Should I expect parity errors being set in L2FMC?

Thanks!

0 QJ Wang over 5 years ago in reply to JC Chasez

TI__Guru**** 197306 points

Hello JC,

Have you solved the problem?

https://e2e.ti.com/support/microcontrollers/hercules/f/312/t/382385?tisearch=e2e-sitesearch&keymatch=scmcntrl

The poster of this thread said that the L2FMC parity error in ESM is set (ESM2.17). I haven't got chance to do the test.

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Compiler/TMS570LC4357: TMS570LC43x SPNU563A - Parity Compare Logic in SCM