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Altera_Forum
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15 years ago

problem Master LCD of Read/write in cyclone II with vhdl

hello, i would to create my master of read and write in LCD in the cyclone II but before start write and read i would write the code of Initialization of the LCD in cyclone II wit...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Is your LCD OK ?

I guess you use 2*16 chararacter Text LCD.

LCD takes approx. 40 ms to "boot up".

In your state machine, when you send init. commands, you must either wait for a time (2ms but it depends of the LCD) or for a busy signal.

Make sure of your control signal : LCD_Rw, LCD_en...

Make sure of your inout LCD_data bus and control signal on this.

Make sure of your init. commands : your sequence. I have a doubt on what you are posted.