"Alex Shepherd" <[EMAIL PROTECTED]> wrote: > My real question is how easy is it in practice to configure the > Dragon or JTAG MkII to reconfigure the /Reset pin all the time using > HV ICSP so I can develop/debug the code while the /Reset line is > used for I/O as well as debugWire?
The JTAG ICE mkII cannot perform HV programming, only the Dragon and the STK500 offer that feature. Naturally, using the pin for debugWire and for IO is mutually exclusive. HVSP is not designed as an in-system programming protocol, but as long as your remaining circuitry does not interfere with the signals used for HVSP (including the +12 V pulse on /RESET), I don't see why it couldn't work. Obviously, an alternative option would be to place the controller in a socket for development work, and then take it out into the programmer socket for HV programming. Yet another option is to implement a bootloader. > I could only use the /Reset pin for an infrequent use that I can > live without while developing and then re-enable when I'm done if > that makes a difference. Either that, or use a chip with more pins for development, and then downscale to the ATtiny85 once the application is basically debugged. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
