> -----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 Joerg Wunsch > Sent: Monday, August 31, 2009 12:13 PM > To: avr-libc-dev@nongnu.org > Subject: Re: [avr-libc-dev] wdt_enable may fail to enable the > watchdogonATmega1281 > > As Weddington, Eric wrote: > > > > Instructions such as sts that use two words (32 bits) are not > > > guaranteed to be executed before an interrupt may fire. > > > Have you tested this on the ATmega1281? > > This behaviour would surprise me a bit, given that the datasheet > chapter about interrupt latency explicitly mentions the increased > latency when the interrupt arrives while a multiword instruction is > currently being executed. > > I'd be interested in setting up a test setup that experimentally > verifies this behaviour, as the assumption the next instruction will > still be executed without being interrupted is quite crucial to the > toolchain.
Exactly. I'm interested to hear what the OP has to say about this. _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
