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testing a bit in a byte array

 
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tkidder



Joined: 19 Feb 2005
Posts: 11
Location: new york usa

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testing a bit in a byte array
PostPosted: Fri Jul 27, 2007 1:20 pm     Reply with quote

I am working on an industrial application using 18f4520. On every encoder pulse a bit is shifted into an array of 500 8bit integers, either a 1 indicating an error or a 0 indicating no error. On each pulse i check if a bit is set at a particular bit position in a byte

int8 sr[500] ;
if(!GError)
{
shift_right(sr,500,0);
else
shift_right(sr,500,1);
}

if(bit_test (sr[BytePos],BitPos)==1)
{
output_high(Kick);
}
The problem seems to be in the bit_test. The manual says you can only use bit_test on a variable.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Jul 27, 2007 1:57 pm     Reply with quote

1. Post a more complete test program, where you show all the variable
declarations and all #define statements. In other words, make it be
a compilable test program.

2. Post whatever error message you're getting from the compiler.

3. Post your compiler version.
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