Matrix 4x4 keypad function as mobile keypad!
DuCz
Posts: 9
Question No 2
As part of my project required the use of Alphanumeric to enter information such as full name and DOB.
I’m thinking of using a matrix 4x4 keypad to have a similar functionality to a mobile phone keypad, e.g. button 1 [noparse][[/noparse]ABC], button 2 [noparse][[/noparse]DEF] and press 1x for “a” 2x for “b” and 3x for ”c” or press “#” to change from alphabetic to numerical VS and so on…
Does anyone done it before?
Or it is better/easier to have the whole alphanumeric layout on the LCD screen, user then press up, down, left, right navigation buttons to select the character? e.g. like in the xbox.
Please HELP! Any idea or suggestions would be greatly appreciated. THANK HEAPS!!!
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BASIC Stamp 2sx:$59 4x20 Serial LCD:$99.95 4 x 4 Matrix Keypad:$19 Parallax Professional Development Board:$149.95 Got helps from Parallax Forums :PRICELESS For everything else:Ebay.com
Post Edited (DuCz) : 7/14/2007 10:51:03 AM GMT
As part of my project required the use of Alphanumeric to enter information such as full name and DOB.
I’m thinking of using a matrix 4x4 keypad to have a similar functionality to a mobile phone keypad, e.g. button 1 [noparse][[/noparse]ABC], button 2 [noparse][[/noparse]DEF] and press 1x for “a” 2x for “b” and 3x for ”c” or press “#” to change from alphabetic to numerical VS and so on…
Does anyone done it before?
Or it is better/easier to have the whole alphanumeric layout on the LCD screen, user then press up, down, left, right navigation buttons to select the character? e.g. like in the xbox.
Please HELP! Any idea or suggestions would be greatly appreciated. THANK HEAPS!!!
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
BASIC Stamp 2sx:$59 4x20 Serial LCD:$99.95 4 x 4 Matrix Keypad:$19 Parallax Professional Development Board:$149.95 Got helps from Parallax Forums :PRICELESS For everything else:Ebay.com
Post Edited (DuCz) : 7/14/2007 10:51:03 AM GMT
Comments
If this is being done on a PBASIC Stamp, you can almost forget about "easier/faster" since you're going to have a heck of a time just storing the information in memory, even temporarily, when you start talking about FULL first and last names and a DOB.
Just something to consider.
Regards,
Bruce Bates
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Thank you very much for your response.
In regarding to storing informations (Full name and DOB), this is a very small database of no more than 10 entries. I'm thinking of adding an External EEPROM, i read somewhere about Ramtron FRAM with capacities up to 64Kx8.
Do you think I'm better off looking for an alternative? like AVR or PIC???
Any idea or suggestions would be greatly appreciated. THANK HEAPS!!!
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BASIC Stamp 2sx:$59 4x20 Serial LCD:$99.95 4 x 4 Matrix Keypad:$19 Parallax Professional Development Board:$149.95 Got helps from Parallax Forums :PRICELESS For everything else:Ebay.com
Good luck.