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PIC18F4550 interface display is not working on power ON

Discussion in 'Microcontrollers, Programming and IoT' started by shindehari, Dec 23, 2018.

  1. shindehari


    May 19, 2014

    I am using 16x2 LCD display interfaced with pic18f4550. I can display latters on it, but if I switch OFF and then tried to switch ON my display is not showing only boxes. Display is showing latter's only when I reset the controller. I don't know why this is happening. I have added 100nf capacitor to the VCC pin of controller.

    Please suggest me any solution that can help me to resolve the issue.
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Obviously the LCD controller is not reset correctly on power on. Obvious solution: send a reset command to the LCD as part of your PIC's initializaton routine.
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