AM2634-Q1: Linker cmd file for AM263x-PRU and the global memory addr for PRU

Hi Will,

Please refer this: (+) AM2634: PRU linker file - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Will Gao said:

And another question is for PRU, if I want to use PRU to access L2 SRAM, what address should I use? Do I need to configure the RAT first? 

As for accessing L2 SRAM, you do need RAT, you can access SRAM directly using the base address.

Will Gao said:

It is R5F to configure the RAT but not PRU itself, right? I can not find corresponding driver in the MCU+ SDK. 

Yes RAT is for R5f, But as stated above you do not need RAT for SRAM access.

FYI: AM243x MCU+ SDK: Region based Address Translate (ti.com)

Hi Will,

You do not need RAT to access L2 SRAM. I am able to write to and read back from L2 ocram with simple sbbo and lbbo instructions:

ldi32 R0, 0x70000000 //Load L2 SRAMaddress in R0
ldi32 R1, 0xDEADBEEF
sbbo &R1, R0,0,4 //Write to L2 SRAM
lbbo &R2, R0,0,4 //Read back.