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Altera_Forum
Honored Contributor
15 years agoTime constraints applied to altera_reserved_tck haven't helped me to fix this problem.
In my case the problem solution was quite simple. After to added a constraint to NIOS clock signal, all my jtag errors (related with clock altera_reserved_tck) disappeared. Eg --- Quote Start --- # Clock constraints create_clock -name "MCLOCK" -period 20ns [get_ports {NIOS_CLK}] -waveform {0.000ns 10.000ns}# Automatically calculate clock uncertainty to jitter and other effects. derive_clock_uncertainty --- Quote End --- where NIOS_CLK is the pin name related with oscillator input. BR,