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Hi all! I need to read out the actuall value of the program counter (PC). How can I do that? I use the Keil uVision environment with an 8051 based controller! Thanks for your help!
I am not allowed to use a "call" function because I am not allowed to alter the stack pointer (SP). Instead of using the "call" command I want to use a "jmp". Before I perform the jump command I need to have the return address from the program counter, so that I can return back to the source of the jump command. That is like I would use a call function, but without altering the SP!
Are you out of stack space, or did someone give you some arbitrary "don't change the SP" directive ? You could recova a few bytes from the stack by popping into unused registers.
I am not allowed to use a "call" function because I am not allowed to alter the stack pointer (SP). Huh, "not allowed"? Pray tell: who or what is stopping you? That restriction seems outright ridiculous. Does "making an omelett without breaking an egg" ring any bell to you?
hi, I want to use a "jmp". ...so that I can return back to the source of the jump command. That is like I would use a call function, but without altering the SP! Sorry? Why not simple:
; main stream ; .... JMP MY_TASK ; go to your "subroutine" L_CONTINUE: ; contunue main stream MY_TASK: ; your piece of code JMP L_CONTINUE ; return to main stream