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karimpain
Joined: 15 Feb 2012
Posts: 39
Location: italia
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| Get a word using pic16f877a |
 Posted: Mon Mar 05, 2012 1:52 pm |
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Hello everyone! Can anyone please tell me how to obtain a word for example 'Heeey' from the rx of the pic using rs232 and depending on this word make a specific function. I programmed a pic using a single character with the specific job,but how can i do that using a word or more than one letter!!?!??!!?
in other words how to read a string not a character.
Thanks 4 reading |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Mon Mar 05, 2012 2:17 pm |
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you get more than one character the same way you put on your pants.
One leg at a time. Or one character byte at a time if it is serial data .....
ideally with a character array, advancing a pointer to thr next place to PUT a receiver character as you go.
There are MANY examples of how to do this including using interrupts on
RX data ready - to help speed the plow for you. |
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karimpain
Joined: 15 Feb 2012
Posts: 39
Location: italia
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| Posted: Mon Mar 05, 2012 2:36 pm |
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| Thanks but can you give me a link of a code or anything else!! |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Mon Mar 05, 2012 2:46 pm |
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there is a wonderful buffered example for getting LOTS of characters into a buffer string called EX_SISR.C , found
in your CCS examples folder
plenty of guidance there on your exact problem. |
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temtronic
Joined: 01 Jul 2010
Posts: 9241
Location: Greensville,Ontario
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| Posted: Mon Mar 05, 2012 2:59 pm |
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| press F11 when your project is open |
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karimpain
Joined: 15 Feb 2012
Posts: 39
Location: italia
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| Posted: Mon Mar 05, 2012 6:34 pm |
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| thanks, i m going to take a look. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Mar 05, 2012 7:34 pm |
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Look at the get_long() function in the input.c file:
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c:\program files\picc\drivers\input.c
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Here are two CCS example files that show how to use get_long():
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c:\program files\picc\examples\ex_pll.c
chan_num = get_long();
c:\program files\picc\examples\ex_malloc.c
num = get_long();
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To use get_long(), you should connect your PIC board to your PC with
an RS-232 cable. Then open a terminal window on your PC, by using
a program such as TeraTerm. You can type in any number in the
range from -32768 to 32767. You must press the Enter key when done
typing the number. The get_long() function will get the number and
convert it to a 'signed int16' value and you can save it in a variable
in your PIC program. |
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