TMS320F280039C: Clarify when using LSx as CLA program memory

Wayne Huang

Genius 15685 points

Part Number: TMS320F280039C

Dear Champs,

I am asking this for our customers.

In TRM,

3.11.2 Local Shared RAM (LSx RAM)

There is a table below.

When we initialize LSx as CLA program (MSEL_LSx = 01, CLAPGM_LSx =1), can CPU still do memory copy CLA codes?

Does Emulation Read/Write in the above table mean only CCS can access the LSx if the memory have been assigned to CLA as program?

We want to clarify, if we do CLA initialization in below order, does it work?

Pseudo codes:

- assign LS0 to CLA as CLA program memory

MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS0, MEMCFG_LSRAMMASTER_CPU_CLA1);

MemCfg_setCLAMemType(MEMCFG_SECT_LS0, MEMCFG_CLA_MEM_PROGRAM);

- memory copy CLA codes from flash to LS0

memcpy((uint32_t *)&Cla1ProgRunStart, (uint32_t *)&Cla1ProgLoadStart,

(uint32_t)&Cla1ProgLoadSize);

memcpy((uint32_t *)&Cla1ConstRunStart, (uint32_t *)&Cla1ConstLoadStart,

(uint32_t)&Cla1ConstLoadSize );

Wayne

over 2 years ago

0 Veena Kamath over 2 years ago

TI__Mastermind 32425 points

It is recommended to do the CLA program copy before configuring the LS memory as CLA program memory.

Regards,

Veena

0 Wayne Huang over 2 years ago in reply to Veena Kamath

TI__Genius 15685 points

Dear Veena,

But would you please confirm the above order is wrong because memory copy cannot work if the corresponding LSx has been assigned to CLA program?

The user is debugging more complicated codes and found their CLA codes cannot work and we are suspecting the above code order was the culprit and trying to confirm the behaviors of these registers (memory configuration in Table 3-11 above).

+1 Veena Kamath over 2 years ago in reply to Wayne Huang

TI__Mastermind 32425 points

From the TRM,

When configured as CLA program memory CPU accesses are not allowed.

Regards,

Veena

C2000™︎ microcontrollers

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TMS320F280039C: Clarify when using LSx as CLA program memory