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the-raspberry-pi-guy / lcd

This repository contains all of the code for interfacing with a 16x2 Character I2C LCD Display. This accompanies my YouTube tutorial here: https://www.youtube.com/watch?v=fR5XhHYzUK0
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Parameter Explanation #24

Closed viridianajim closed 3 years ago

viridianajim commented 3 years ago

Hi

I am working on a small project, and I need to display an ID and a name into my LCD screen

I am using display.lcd_display_string("TEXT", 1)

I have been testing different numbers; however, the second display.lcd_display_string("TEXT2", 1) that I use does not display the text as I want.

Do you have any documentation that explains the parameters of this method?

Thanks

cgomesu commented 3 years ago

Do you have any documentation that explains the parameters of this method?

I don't think so, @viridianajim . It's pretty straightforward though. You're probably not cleaning the LCD before the second write. Check the comments in the i2c_dev.py file, specifically:

    # put string function
    def lcd_display_string(self, string, line):
        if line == 1:
            self.lcd_write(0x80)
        if line == 2:
            self.lcd_write(0xC0)
        if line == 3:
            self.lcd_write(0x94)
        if line == 4:
            self.lcd_write(0xD4)
        for char in string:
            self.lcd_write(ord(char), Rs)

    # clear lcd and set to home
    def lcd_clear(self):
        self.lcd_write(LCD_CLEARDISPLAY)
        self.lcd_write(LCD_RETURNHOME)

Check the code in the demos as well. Their implementation should give you an idea how to display the IDs for your project.

the-raspberry-pi-guy commented 3 years ago

Thanks for the reply to this @cgomesu :) Closing the issue