I´m thinking about using the internal TAP controller and the boundary scan chain of the virtex devices to test our board. Currently we using special bitstreams for this purpose. As I found in the manual I only have to issue the EXTEST command and feed data to the 3bit/per IO chain. Is this the right order? Or should the first command the SAMPLE command and then - when all data is written - the EXTEST command?
Some advices would be welcome ;-)
kind regards, thomas