NEWBIE: how to get text onto 2 lines on a 16x2 lcd display
RobH
rob at despammer.com
Thu Sep 26 18:04:15 EDT 2019
On 26/09/2019 20:21, RobH wrote:
> On 26/09/2019 17:51, Dennis Lee Bieber wrote:
>> On Thu, 26 Sep 2019 11:58:15 +0100, RobH <rob at despammer.com> declaimed
>> the
>> following:
>>
>>
>>>
>>> import Adafruit_CharLCD as LCD
>>>
>>
>> FYI: from Adafruit's download site:
>> https://github.com/adafruit/Adafruit_Python_CharLCD
>> """
>> DEPRECATED LIBRARY. Adafruit Python CharLCD
>>
>> This library has been deprecated! We are leaving this up for
>> historical and
>> research purposes but archiving the repository.
>>
>> We are now only supporting the use of our CircuitPython libraries for use
>> with Python.
>>
>> Check out this guide for info on using character LCDs with the
>> CircuitPython library:
>> https://learn.adafruit.com/character-lcds/python-circuitpython
>> """
>>
>>
>>> # Print a two line message
>>> # lcd.message('Hello\nworld!')
>>
>> The example "two-line message" relies upon an embedded new-line
>> character.
>>
>>> lcd.message( "Hello" 1)
>>
>> This should produce a syntax error
>>
>> .message(string) only takes one argument -- a string to display. If said
>> string contains a newline, the library invokes a .set_cursor(col, row) to
>> move to the start of the next line (though line is limited to the defined
>> configuration maximum).
>>
>> If you want to manually position text, you'll need to invoke
>> .set_cursor(col, row) to do that, then invoke .message(string) to provide
>> the text.
>>
>> As mentioned, the library you are using is no longer supported by
>> AdaFruit. They would prefer you to install the "adafruit_blinka" library
>> which provides an interface to invoke CircuitPython libraries from boards
>> running full Python (CircuitPython runs on microcontrollers like
>> AdaFruit's
>> Metro cards). (You'd then have to also install the CircuitPython
>> libraries)
>>
>> https://learn.adafruit.com/circuitpython-on-raspberrypi-linux
>> (also applies to BeagleBone Black, as I recall)
>>
>>
>>
> Thanks for that, as I didn't realise it was deprecated, and have
> downloaded the circuitpython charLCD files.
>
> Also, I note on the site from the link for circuitpython, there is
> information and examples of how to put text on 2 lines, using the
> embedded newline character.
>
> As I said I am a newbie with python and I did not realise that this
> would do what I wanted, doh!
>
> # Print a two line message
> # lcd.message('Hello\nworld!').
>
> Thanks again.
>
As I said, I have downloaded the circuitpython chalcd files from the
link using pip3 install, but after downloading I can't find any Adafruit
folders on my pi zero. Doing a search for adafruit does not show anything.
You don't happen to know where it goes to do you.
Thanks
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