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fpga implementation of keypad scanner & lcd interface

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pratik bheley

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can you give me please the verilog code for keypad scanner & to interface lcd with fpga kit spartan 2e or 3e,also please give necessary documentation regarding above,necessary guideline regarding how to implementent it on fpga kit , i am new fresh user to verilog, i needed it bardly,so please guide me as early as possible
 

Re: fpga implementation of keypad scanner & lcd interfac

Hi,

I have implemented keypad scanner before..
I hope that you knew how keypad is working. When you push a button, a row and a column becomes shortcut. It's a kind of array and these columns and rows are open-circuit normally...
My keypad has 4 rows and 5 columns.. For each 1ms, I have applied '1' to each row.. After applying '1' to rows, I have checked the columns that is there any '1'..
I have registered the number of row which I applied '1'.. If I observed '1' from Xth column, I have registered the number of column again...
So, using these registered numbers I can decide which button is pushed...
You may use the same technique...

Good luck
Ilgaz
 

Re: fpga implementation of keypad scanner & lcd interfac

thank but i want to ask ,if we are using 3*3 keypad which is present in spartan kit ,if i pressed any key ,subsequently result should be display on lcd as lcd is also present in spartan kit,how i can implement that, for that i guess i requried
all pin confriguration like keypad 3*3 pin,lcd internal pins for interface & even i donot have code to dump on fpga kit ,please help me can you given
block diag. of my project such that i can code it or give me code that can me helpfull as a reference
 

Re: fpga implementation of keypad scanner & lcd interfac

please help regarding clk of 50mhz of verilog code of lcd interfencing as spartan 3e kit is of 4mz max,please repley
 

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