Re: [avr-chat] How to do JTAG only programming

[Joerg Wunsch]

address@hidden wrote:

> I'm trying to add support for ATmega406 to the avrdude.conf but
> apparently, this MCU does not support the "SPI Serial Instruction
> Programming Set", so I don't know what to enter in the "pgm_enable",
> "chip_erase", "read", "write", "loadpage", etc. sections.

I think you could simply omit those in that case.  The JTAG ICE code
will never reference them anyway.

> Can someone assist me on that? I already have the "JTAG Instruction
> Programming Set" of the ATmega406, but those instructions are split
> into a TDI and a TDO part.

AVRDUDE doesn't talk JTAG by itself, it always relies on tools like
the JTAGICEmkII or AVR Dragon for that.  Thus, the low-level JTAG
instructions are not needed here.  (The communication with the ICE or
Dragon is described in appnote AVR067, this is what AVRDUDE uses.)

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)