Can I use a Keypad in PRT1DR with CY8C27443?

Anonymous · ‎Oct 05, 2013

Hello, I making a project where i need to use a keypad (4x4), for this I use a PSOC CY8C27443-24PXI with a CY3210-PSoCEval1. I configure the port in pull-up mode and the library worked perfectly. When i use the keypad in PRT1DR this work fine, but if i disconnect from alimentation and after i try to use again only works one arrow. Idetected that it only happen in this port becuase i do the same procedure in PRT0DR and it work without problem, i have been change the microcontroler,too, because i thought that it will be damaged, but it same the same with 3 diferent PSoC´s. I want know if is normal that it pass, and if there are mode of use in this port some body could same me please becuase in my proyect i need to use analog input too, and this are in the port0, and the port2 i use for the LCD.

Anonymous · ‎Oct 05, 2013

Hi maytzuc

What kind of interface with keypad do you use?

There are some way,

4bit x 2 digital input...

Resistive divider and analog input..

I assume you are using digital input.

you can use shadow register also.

Anyway, This is a complex issue

If you upload the project bundle, you may get more help.

Anonymous · ‎Oct 05, 2013

tanks por your helpthis is the document the file subrutinateclado is the library for keypad.

Anonymous · ‎Oct 05, 2013

When you upload something, Use IE, Safari or FireFox except Chrome for the browser.

Anonymous · ‎Oct 05, 2013

Ok, thanks i'm sorry is the first time that i post a program

Anonymous · ‎Oct 06, 2013

        Hi I got glance it.
I can't say anything about cause but,
I would give you an actual working design of mine.
Please cloning into C27433, Wipe out unuse mudules.

It is C code, you can understand easily, I think.
I can't talking so much, It is sorry.
Please treat as "As Is"
There are some Extra !