TMS320F2808-Q1: How to access RPC register from C or assembly

Hello Peter,

Referring to the C28x Instruction Set, you can only access the RPC by pushing/popping it from the stack. What you could do is push it to the stack and then pop it into a register to view it, but this would need to be done in assembly.

See this thread: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/693819/ccs-tms320f280049-how-to-read-rpc

Best regards,

Omer Amir

The indicated thread is unfortunately not helpful. I need to know the function that called the wake ISR, not the function that called the assembly function. I agree that pushing and popping are required, but I don't myself know how to get the RPC into a C symbol.

The indicated thread is unfortunately not helpful. I need to know the function that called the wake ISR, not the function that called the assembly function. I agree that pushing and popping are required, but I don't myself know how to get the RPC into a C symbol. Perhaps a more targeted question would be: How do I move the ACC into C symbol?

Hello Peter,

Peter Schmid said:

How do I move the ACC into C symbol?

You can refer to the C28x Instruction Set I linked in my initial post. All assembly instructions are described there. For your question, if you have the address of the symbol then you can use the MOVL instruction (or MOV instruction if you're only saving the lower word of the ACC register):

Best regards,

Omer Amir