AM2634: PRU program written in C: C environment and stack pointer initialization

Part Number: AM2634

Dear TI support service,

recently, I started developing a simple program that makes the R5F and the PRU cores of an AM2634 communicate.

I had some difficult times with the proper C environment initialization, e.g. the stack pointer value, so I wanted to check with you if what I have done is OK:

• I have added to my PRU project the boot.c file (taken from C:\ti\ti-cgt-pru_2.3.3\lib\src\boot.c)
• I have set as entry point the routine _c_int00_noinit_noargs
• in the linker.cmd file, I have set: 
  .text:_c_int00* >  0x0, PAGE 0
  ...

  .stack          >  PRU0_DMEM_0, PAGE 1

   

  this way, I was able to load the PRU firmware file from the R5F core and execute it.

   

  The question is: 

  • is this the correct way to set up a PRU C project that can be loaded from a R5F core?

   

  Best regards, and many thanks for your help!