deepakomanna
Joined: 06 Mar 2007
Posts: 92
Location: Pune,India
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| need help abt bit fields & arrays |
 Posted: Fri Mar 28, 2008 3:32 am |
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Dear Sir,
I am using CCS PCM C Compiler, Version 4.052, 40286
In my code i defined array like this,
| Code: | const unsigned int32 RPM[21] = {73171,52174,33333,28571,25000,22222,20339,20000,18750,15000,14634,13333,12000,10909,7500,7059,6667,6316,5714,5217,5000};
const signed int16 C1_SLP[20] = {31,31,56,26,106,16,184,14,14,14,14,14,14,14,14,14,14,14,-166,31};
const unsigned int16 C1_DLY[20] = {8740,6232,3981,2937,2569,1420,1299,1056,990,792,772,704,633,576,396,373,352,333,302,623};
const signed int16 C2_SLP[20] = {31,31,65,25,25,25,25,25,25,196,21,21,63,16,16,16,16,16,-133,31};
const unsigned int16 C2_DLY[20] = {8740,6232,3981,2778,2431,2160,1977,1944,1823,1458,1179,1074,967,697,479,451,426,404,365,623};
const signed int16 C3_SLP[20] = {48,23,23,23,80,47,97,12,12,12,12,12,12,12,12,12,12,12,-182,31};
const unsigned int16 C3_DLY[20] = {8740,4783,3056,2619,2292,1420,1073,944,885,708,691,630,567,515,354,333,315,298,270,623};
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but unnecessarily i am wasting space i.e.
in RPM[21] = max data range is 17 bit but i my allocation is 32 bit (const unsigned int32),
C1_SLP[20] = max data range is 9 bit but i my allocation is 16 bit(const signed int16),
like wise others,
So,By using bit fields i want to save memory space
Can you plz help me how to assign these arrays by using bit fields,Also Plz tell me how to access it by example,
_________________
Thank You,
With Best Regards,
Deepak. |
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