Re: [AVaRICE-user] I killed the device JTAG ID
2005-01-18 by Russell Shaw
Nils Kristian Strom wrote: > On Tue, 2005-01-18 at 20:13 +1100, Russell Shaw wrote: > >>Hi, >>I've made avr-gdb control the atmel jtag ice directly. > > Cool! > >>In getting the lock and fuse programming working correctly, >>somehow i erased the JTAG device ID and now it all reads as ff. > > > There is no way (at least documented) to clear the device ID. I suspect > that you disabled JTAG completely, this makes the device "invisible" to > jtag commands (reading the fuses as 0xff is the same as no device there > at all). > > To enable the device again, afaik you need a parallell programmer of > some kind. yeah, i think so. My avrisp serial one wouldn't work either (SPIEN=1 probably). Think the fuses got written 0xff. I'll make a simple dipswitch programmer where i can program the chip in direct binary twiddling dipswitches;)