> -----Original Message----- > From: > avr-libc-dev-bounces+eric.weddington=atmel....@nongnu.org > [mailto:avr-libc-dev-bounces+eric.weddington=atmel....@nongnu. > org] On Behalf Of Danjel McGougan > Sent: Friday, August 28, 2009 3:03 AM > To: avr-libc-dev@nongnu.org > Subject: [avr-libc-dev] wdt_enable may fail to enable the > watchdog onATmega1281 > > This macro seems to depend on the fact that at least one more > instruction will be executed after global interrupts are enabled > before an actual interrupt can happen. But this fact seems only to be > true for instructions using only one instruction word (16 bits). > Instructions such as sts that use two words (32 bits) are not > guaranteed to be executed before an interrupt may fire. I have learned > this the hard way after trying to optimize interrupt latency in my > application for ATmega1281. It does not seem to be documented by > Atmel.
Have you tested this on the ATmega1281? Have you tested this on any other ATmega device? _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
