Astrobe Forum

Two questions: With an interrupt, only R0 to R3 [1] are pushed onto the stack upon entry of the ISR. Does the compiler automatically account for this limitation when compiling ISRs, or is there anything I need to take care of manually? Does all thread mode (ie. not handler) code run privileged? Is t...

Here's a version that works without changing Traps.mod, using the vector swapping technique (relevant excerpt from my Kernel.mod module, leaving out the SysTick business). CONST ... SVC_Instruction = 0DF00H; SVC_Vector = 02CH; VAR ... sysHandler: PROCEDURE; svcTrapAddr: INTEGER; PROCEDURE svcHandler...

I want to use the SVC call/mechanism not only for error handling, but also executing code that is safe from interference by interrupt service routines (ISR), eg. to avoid race conditions. Thusly executed code must be small and fast for the least possible interference with the incoming interrupts. As...

IMO, that would be a great addition to the debugging toolbox. The location of an error is a good start and mostly helpful for modules of your main controller-logic, but for library modules that are used from different locations, to know what calls lead to an error is crucial. I am also confident tha...

If a run-time error occurs, or a user-trap is triggered, is it possible to get (print, or create/retrieve a data structure such as a linked list) the call stack, ie. the chain of procedure calls that resulted in the trap? Thanks.