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JP
Joined: 14 Feb 2004 Posts: 8 Location: Belgium
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RS232 => RS232_ERRORS |
Posted: Wed Feb 18, 2004 2:21 am |
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Hello everybody,
Please excuse my bad english,
I want to use the hardware diagnostic option of the RS232 serial port for
a PIC16F877.
I have read that the RS232_ERRORS variable can help me to
solve this problem but the manual is no so clear about this function.
Have You a litle description of each bits that compose the variable
( or the variable is this a simple copy of a common register of the pic like RCSTA ) ?
My 2° question is the following :
The C language is very new for me, so can I use the Getc() function to read a byte ( 0 -> 255 thus not an ASCII character ) or may have to read
the incoming byte directly in the RCREG register of the PIC ?
To finish, I find that compilers CCS are really super but the
documentation should be sometimes more complete.
Thank You for your help,
J-P |
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Guest
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Posted: Wed Feb 18, 2004 6:53 am |
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This forum may be your best source for information on RS232_ERRORS. If you try a search using key words: RS232 ERRORS, you shoukld find quite a lot of info. I have used it in a decalration as follows:
#use rs232(baud=9600, xmit=PIN_A2,rcv=PIN_A3, ERRORS)
Using it like this should clear RS232 errors when they occur, but I haven't done anything in detail with it.
To answer your second question.
"The C language is very new for me, so can I use the Getc() function to read a byte ( 0 -> 255 thus not an ASCII character ) or may have to read......"
you can use getc() or getch(). The value is as you pointed out 0..255 (but this will give the ascii equivilent if you need it - just store it or display it as char or int as required.
Experiment with this to see the result.
char letter;
letter = 'A'
printf("ASCII: %c, int:%d", letter, letter); |
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JP
Joined: 14 Feb 2004 Posts: 8 Location: Belgium
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RS232_ERROR and getc() |
Posted: Wed Feb 18, 2004 8:16 am |
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Hi,
Thank You for your response and the example.
I am happy to learn that I can read so easy a byte with the getc() function.
Have a nice day,
J-P |
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