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Table-ize the Mode A to C conversions, add a Mode C to Mode A conversion function.

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This commit is contained in:
Oliver Jowett 2016-10-11 17:57:25 +01:00
parent 10b5cde505
commit 60f1f3bcb6
7 changed files with 68 additions and 7 deletions
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12
track.h
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@ -200,4 +200,16 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm);
/* Call periodically */
void trackPeriodicUpdate();
/* Convert from a (hex) mode A value to a 0-4095 index */
static inline unsigned modeAToIndex(unsigned modeA)
{
return (modeA & 0x0007) | ((modeA & 0x0070) >> 1) | ((modeA & 0x0700) >> 2) | ((modeA & 0x7000) >> 3);
}
/* Convert from a 0-4095 index to a (hex) mode A value */
static inline unsigned indexToModeA(unsigned index)
{
return (index & 0007) | ((index & 0070) << 1) | ((index & 0700) << 2) | ((index & 07000) << 3);
}
#endif