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Altera_Forum's avatar
Altera_Forum
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16 years ago

character_LCD controlled by fpga

Hi ,you.Here is my problem.

When power-supply the board (cycII),the lcd on it will show the definite the characters "websever starting up". When I want to take control of the LCD,I feel unsure that whether I should still use software initialization written in HDL or not.

I have wrote the "clear the display" function when electrifing it without software initialization, but it didn't work.

The last quetion is that is the rising_edge or falling edge of LCD_E signal that take control of receiving the 8bit data.

Thanks!

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Please give more information about how you initialize the LCD. Are you driving the LCD from software or from the logic? It might help if you publish some code in here.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Thanks for repling. What I want to know is just the theory on that day, but after seeing some codes , I find out that the initialization should be done before you use the lcd, even though the reset circuit has done for you.

    What's more to is that we should not obey the process flow in which several funtion set should be done which puzzled me.