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C51 C8051F580 compiler special software interrupt

Fausto Bartra

is there a special ID interrupt for a software interrupt in the compiler?

I am trying to pass information from one application to another by using an interrupt.

any information will be appreciated

Thank you 

Fausto Bartra

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  • +1

    That's a big can or worms you're opening up, since only a very limited amount of the 8051 context is automatically stacked as a result of interrupts and there is no software interrupt that I am aware of.

    See also: RTX51 Tiny Real-Time Operating System which is included only with the PK51 Professional Developer's Kit. 

    In any event, you can fake an ISR in code by finding a hardware module you are not using and setting's its interrupt bit. I doubt this works for every hardware module, but the UART0 is one example that works (assuming you aren't using UART0):

    TI0 = 1;                         // Fake an ISR. (SWI)

Reply
  • +1

    That's a big can or worms you're opening up, since only a very limited amount of the 8051 context is automatically stacked as a result of interrupts and there is no software interrupt that I am aware of.

    See also: RTX51 Tiny Real-Time Operating System which is included only with the PK51 Professional Developer's Kit. 

    In any event, you can fake an ISR in code by finding a hardware module you are not using and setting's its interrupt bit. I doubt this works for every hardware module, but the UART0 is one example that works (assuming you aren't using UART0):

    TI0 = 1;                         // Fake an ISR. (SWI)

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