AVR8 watchdog (reset and interrupt) atmega328p I wanted to use the 128 kHz watchdog oscillator as an additional timer. I saw that AVR8 watchdog timer and reset was addressed on the mailing list in late 2013 using assembler.frt
In the source tree there is an assembler word -wdt (no-wdt.asm), which writes $0 to WDTCSR (using the prescribed sequence), but I couldn't find something like a "+wdt". This may well be because I did not look hard enough, so my apologies if it was there all along. Using -wdt as a template I have written four companion assembler words and a slightly modified version of -wdt (to leave the existing prescaler and WDIE bit unmodified). +wdt ( -- ) set WDE (System Reset Mode) -wdt ( -- ) unset WDE (leaves prescaler) +wdi ( -- ) set WDIE (Interrupt mode) -wdi ( -- ) unset WDIE (leaves prescaler) wd.delay! ( n -- ) set prescaler , unset WDE and unset WDIE where n is the 4 bits representing the prescaler. With the 4 cycle write requirement dealt with by (optional at build time) built in words the 128kHz timer is accessible and adds a lot. Could similar words be added to AmForth or is this too device/application specific? ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
