hey,
when defining GPIO ports do we have to consider the actual pin in raspberry pi or the GPIO number. for example if im using pin 40 opposite to the pin 39(GND) with LCD, should i say LCD_RS = 40 or LCD_RS = 21 ?
Re: GPIO define
You have to use the numbers recognised by the software you are using.
Some software use pin numbers (physical pin number on expansion header), some use Broadcom gpio number, and some use their own numbering scheme.
Some software use pin numbers (physical pin number on expansion header), some use Broadcom gpio number, and some use their own numbering scheme.
Re: GPIO define
i am trying to connect a 16x2 lcd display. normally i write the program by typing nano filename. is this what did you mean by software?
Last edited by thamaeng on Mon Nov 17, 2014 5:55 pm, edited 1 time in total.
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DougieLawson
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Re: GPIO define
That is 100% irrelevant. Please re-read Joan's answer.thamaeng wrote:i am using raspian. and using nano to write the program.
Note: Any requirement to use a crystal ball or mind reading will result in me ignoring your question.
Criticising any questions is banned on this forum.
Any DMs sent on Twitter will be answered next month.
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Criticising any questions is banned on this forum.
Any DMs sent on Twitter will be answered next month.
All non-medical doctors are on my foes list.
Re: GPIO define
DougieLawson wrote:That is 100% irrelevant. Please re-read Joan's answer.thamaeng wrote:i am using raspian. and using nano to write the program.
please do you mind explaining his question.
Re: GPIO define
What software is going to use the value of LCD_RS?
Re: GPIO define
Are you writing C software or Python or something else?
If you are not sure, could you post a few lines of the code here, in code tags.
If you are not sure, could you post a few lines of the code here, in code tags.