State Machine Coding?

Question

Hello, I am writing a character controller using Altera MAXII device. This controller will monitor the input signals from lpt port. I make a simulation and download to real chip to verify function, but unfortunately it won't work as I designed. The simulation show that the state translate signals was initiated abnormal.. I pass this to Altera local FAE, no one knows why, and their "my support", no response. I also make the simulaiton on their QII 4.1 and 4.2, the result is the same. Since I can't post my code and result here. If you are interested, I can mail to you for your reference!

Thank you in advance.

BR, Johnson

Mike Treseler · Accepted Answer

It won't work as you *expected*.If the simulation doesn't work, there is a design error.Debug it.           -- Mike Treseler

Johnson Lee · Answer

Well, My simulation is ok! But the result is not as what I planned to have. I abstracted some codes and attached in below for your reference:

--------------------------------------------------------------------- PROCESS( RST, FLAG2, TP41, TP11, TP51, TP31) BEGIN IF RST='1' THEN BIOS1_ck

Ulf Samuelsson · Answer

Check out this CPLD tool            CPLD0100-00 MAINBOARD FACT* Quick affirmation of a logical design* Affordable system* Free upgrades over internet* Simple 5V system with a single 9V supply* LAB board on PCB for own experiments* Strap:s in separate box included* Target is ATF1508, allows for verification of 1504 and 1502 design:s* ProChip 4.0 in packet* 64 channel pre connected scanner for all I/O of the ATF1508* Menu driven system* ATF1508 in delivery* Quick at debugging level and designThis should allow you to single step your PLD at 1 Hz or less , whilefeeding it with stimuli form your PC.It will record what is happening and can store the output values  back onthe PC.Cost of the board is about $600 + VAT.Built to work with the Atmel CPLDs.If you wan tto try with others, you have to find out a way to adapt.-- Best Regards,Ulf SamuelssonThis message is intended to be my own personal view and itmay or may not be shared by my employer Atmel Nordic AB

Mike Treseler · Answer

Consider a synchronous design.          -- Mike Treseler

State Machine Coding?

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