MSP430FR2433: Definition for Machine Register

Thomas Foxcroft

On page 134 of the "Optimizing C/C++ Compiler Users Guide," (SLAU132X) the portmanteau machine register appears. That refers to the CPU registers; meaning, R0 through R15. Is that correct?

over 5 years ago

+1 JD Crutchfield over 5 years ago

TI__Mastermind 30570 points

Hello,

In a general sense, yes. Along with the PC register, etc. It's saying they need to be preserved since they may be temporarily used in the interrupt. This is done by pushing the key ones on the stack when jumping to an interrupt and then popping them back off the stack once exiting the interrupt.

Thanks,

0 Thomas Foxcroft over 5 years ago in reply to JD Crutchfield

Expert 2996 points

Thank you.

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MSP430FR2433: Definition for Machine Register