I am starting to do it this way for now, but I feel the inline assembly in a C function is a little messy when I really just want to write in assembly.
-----Original Message----- From: mspgcc-users-ad...@lists.sourceforge.net [mailto:mspgcc-users-ad...@lists.sourceforge.net] On Behalf Of Mark Stokes Sent: Monday, February 24, 2003 4:08 PM To: mspgcc-users@lists.sourceforge.net Subject: RE: [Mspgcc-users] assembler interrupts You can do it in C... The compiler will do nothing automatically (because of the naked property), so you can do whatever you want w/ the registers in __asm__ statements. And the vector table is set. Check section "6. Interrupt API" here: http://mspgcc.sourceforge.net/doc_intro.html Here's a quick example asm statement that will add two numbers together (in BCD math): In this case, there are two globals: unsigned long int var1, inc1; __attribute__((naked)) interrupt (BASICTIMER_VECTOR) wakeup BasicTimerIRQ(void) { __asm__( "CLRC \n\t" "DADD.W %A1, %A0 \n\t" "DADD.W %B1, %B0 \n\t" : "=m" (var1) : "m" (inc1) ); __asm__( "reti" ); } -Mark -----Original Message----- From: mspgcc-users-ad...@lists.sourceforge.net [mailto:mspgcc-users-ad...@lists.sourceforge.net] Sent: Monday, February 24, 2003 3:44 PM To: mspgcc-users@lists.sourceforge.net Subject: [Mspgcc-users] assembler interrupts How can I specify that an assembler function is a particular interrupt handler. In other words, how to I set the vector table entry in assembler. I would like to make a timer A interrupt handler in assembly. I have done it in C, but need more control over the exact register usage. ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
