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Altera_Forum's avatar
Altera_Forum
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18 years ago

multiple constant drivers error

Hi, I open this thread because I have an error on Quartus II (web edition) and I can't finf how debug them. error name: " can't resolve multiple constant drivers for net "etat_suiv....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hello,

I've been using similar displays (HD44780 controller type) with microprocessors, but not yet with FPGA. I think, there are many ways to get it non-operating, but I don't see a particular favourite. Are you sure, the interface timining is correct. After reset, some instructions must be used with long wait periods, also in normal operation, the interface is rather slow compared to FPGA standards.

Regards,

Frank