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annotate dds.h @ 259:6c748ed6a7c5

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Stricter error checks ad9912 ramp frequency function
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Tue, 16 Jun 2015 14:33:36 +0200
parents 5296f3bcd160
children
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1 #ifndef __FXANALYSE_DDS_H__
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2 #define __FXANALYSE_DDS_H__
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3
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fcc988c6f841 Fix ad9956 sweep rate setting. Disable clock divider on init. Simplify
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4 typedef long long int64;
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5 typedef unsigned long long uint64;
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6
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7 static inline uint64 ftw(double clock, double freq)
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8 {
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9 uint64 ftw = freq * ((double)(1ULL << 48) / clock);
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10 return ftw;
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11 }
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13 static inline double freq(double clock, uint64 ftw)
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14 {
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15 double freq = (double)ftw * (clock / (double)(1ULL << 48));
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16 return freq;
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17 }
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19 static inline int strtouint64(const char *str, uint64 *v)
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20 {
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21 char *end;
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22 *v = strtoull(str, &end, 0);
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23 if (*end != '\0')
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24 return -1;
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25 return 0;
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26 }
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28 #endif
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