TMS320F280041: CLA and CPU MSGRAM

Huihuang Chen

Expert 4050 points

Part Number: TMS320F280041

Hi Champ,

As we know F280041 without CLA，any risk if customer using following way to initial CPUTOCLA1 and CLA1TOCPU RAM.

MemCfgRegs.MSGxINIT.bit.INIT_CPUTOCLA1 = 1; //408535

while(0 == MemCfgRegs.MSGxINITDONE.bit.INITDONE_CPUTOCLA1);

MemCfgRegs.MSGxINIT.bit.INIT_CLA1TOCPU = 1; //408551

while(0 == MemCfgRegs.MSGxINITDONE.bit.INITDONE_CLA1TOCPU);

over 4 years ago

0 Veena Kamath over 4 years ago

TI__Mastermind 32565 points

Hi,

For F280041, the CLA registers are not present. Since these registers are part of memcfg, these would still be available, and the write to MSGxINIT will pass. I am not sure whether the MSGxINITDONE register will be set or not. Let me confirm it with the design owner and get back to you

Regards,

Veena

0 Huihuang Chen over 4 years ago in reply to Veena Kamath

TI__Expert 4050 points

Hi Veena,

Any update about whether the MSGxINITDONE register will be set or not?

0 Veena Kamath over 4 years ago in reply to Huihuang Chen

TI__Mastermind 32565 points

Apologies for the delay.

I just got confirmation from the module owner that the INITDONE register will get set. But the MSGRAM may not be usable.

May I know why would one initialize CLA MSGRAM on a device without CLA?

Regards,

Veena

0 Huihuang Chen over 4 years ago in reply to Veena Kamath

TI__Expert 4050 points

Veena,

Could you advise why the MSGRAM may not be usable?

My understanding is CLA1TOCPU MSGRAM still exist in F280041 device, but MSGRAM cannot used due to F280041 without CLA.

Because customer used F280049 before, but new project change to F280041, this portion code still used in F280041 due to the code is porting from F280049.

0 Praveen Kumar Ravichandran over 4 years ago in reply to Huihuang Chen

TI__Expert 4610 points

Hi,

CLA1TOCPU MSGRAM is writable only from CLA. If the CLA is not available, it may not be writable in the F280041 device.

Regards,

Praveen

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280041: CLA and CPU MSGRAM