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rs232

 
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cyberjok



Joined: 04 Apr 2006
Posts: 6

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rs232
PostPosted: Mon Apr 10, 2006 9:27 pm     Reply with quote
help me!

pic12f675 == internal RC ==4000000HZ

PUTC(X) WORK ARE VERY GOOD! BUT GETC() CAN'T WORK !!! WHY ? HOW CAN I DO?? Confused
SherpaDoug



Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA

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PostPosted: Tue Apr 11, 2006 6:39 am     Reply with quote
Check the datasheet to see if the internal RC is accurate enough. It should be within about 3% for reliable RS232. If this is just an experiment you may be able to measure your actual clock speed and give that exact speed to the compiler. However the speed of the RC may vary with voltage, temperature, etc..
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cyberjok



Joined: 04 Apr 2006
Posts: 6

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thanks!
PostPosted: Fri Apr 14, 2006 1:16 am     Reply with quote
thanks!
i wrote get_char and put_char instead of getchar and putchar//
it work very good!




SherpaDoug wrote:
Check the datasheet to see if the internal RC is accurate enough. It should be within about 3% for reliable RS232. If this is just an experiment you may be able to measure your actual clock speed and give that exact speed to the compiler. However the speed of the RC may vary with voltage, temperature, etc..
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