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Keypad header file for atmega

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Discussion in 'Microcontrollers, Programming and IoT' started by Maisha, Apr 25, 2016.

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  1. Apr 25, 2016 #1
    Maisha

    Maisha

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    Apr 22, 2016
    Does anyone know a link to keypad header file for avr?
     
    Last edited: Apr 25, 2016
  2. Apr 26, 2016 #2
    Sadlercomfort

    Sadlercomfort Ash

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    Feb 9, 2013
  3. May 5, 2016 #3
    Maisha

    Maisha

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    Apr 22, 2016
    If we want to read data in the lcd to use with the our code how should we change the R/W pin.?In this case is it connected to a MCU pin Or to thr GND .?
     
  4. May 5, 2016 #4
    Sadlercomfort

    Sadlercomfort Ash

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    Feb 9, 2013
    It is common for the R/W pin to be tied to GND when not in use (to save MCU pins), which means you can only write data to the LCD.

    If you wish to read and write data to the LCD, you can connect the R/W to a MCU pin... Now you can set LOW to write data, HIGH to read data.
     
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