Hi All: Has anyone on this list successfully cascaded the JTAG ports of an ATMega128 and an Altera device? I'm having trouble with it at the moment, and I'm not sure whether the problem is with my dodgy hacked-up cascade cable, the software (javr and quartus), the particular device not supporting jtag fully (altera MAX7k, but actually need to know about altera epc2), or the pinout I'm using.
The normal singly connected way is like this: Byteblaster TDO <-> AVR TDO AVR TDI <-> Byteblaster TDI And also: Byteblaster TDO <-> Altera TDO Altera TDI <-> Byteblaster TDI This works, even though my nomenclature may be wrong (it should probably be byteblaster TDO <-> AVR TDI etc). Anyway, using the same nomenclature, I'm trying an altera byteblaster MV with the following connection: Byteblaster TDO <-> Altera TDO Altera TDI <-> AVR TDO AVR TDI <-> Byteblaster TDI So, it should work, in theory. However, I get a jtag chain incomplete error from both javr and quartus. I'm going to try jtag from the openwince toolkit once I get my cygwin installation fixed, but in the meantime I'd be happy to hear suggestions on connection, cabling, or other things to try. Cheers, Matthew van de Werken - Electronics Engineer CSIRO E&M - Rock Mass Characterisation - 1 Technology Court - Pullenvale - 4069 p: (07) 3327 4142 * f: (07) 3327 4455 * e: [EMAIL PROTECTED] "We do not inherit the earth from our ancestors, we borrow it from our children." -- Native American Proverb _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
