It's nearly impossible to find compilers that agree on how to handle interrupt code. Introduction to avr-libc's interrupt handling Macros for writing interrupt handler functionsĭetailed Description Note This discussion of interrupts was originally taken from Rich Neswold's document. įrequently, interrupts are being disabled for periods of time in order to perform certain operations without being disturbed see Problems with reordering code for things to be taken into account with respect to compiler optimizations. Handling interrupts frequently requires attention regarding atomic access to objects that could be altered by code running within an interrupt context, see. The global interrupt flag is maintained in the I bit of the status register (SREG). We really like them and hope you will too.Global manipulation of the interrupt flag Every one of our AVR tutorials was done using a USBASP programmer. The programmer is ideal for use with our AVR development board and kits.Īt Protostack we like to eat our own dogfood, so we use the USBASP programmers extensively. Included with the programmer is a 10 pin ISP cable, as shown in the main photo.
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