Updated functions to deal with USB clocking. (PPL1) See http://www.nxp.com/documents/user_manual/UM10360.pdf Section 4.6 & 4.7.3
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Diff: CoreMark/cvt.c
- Revision:
- 0:b5d3bd64d2dc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CoreMark/cvt.c Sun Jan 24 15:46:26 2010 +0000 @@ -0,0 +1,102 @@ +#include <math.h> +#define CVTBUFSIZE 80 +static char CVTBUF[CVTBUFSIZE]; + +static char *cvt(double arg, int ndigits, int *decpt, int *sign, char *buf, int eflag) +{ + int r2; + double fi, fj; + char *p, *p1; + + if (ndigits < 0) ndigits = 0; + if (ndigits >= CVTBUFSIZE - 1) ndigits = CVTBUFSIZE - 2; + r2 = 0; + *sign = 0; + p = &buf[0]; + if (arg < 0) + { + *sign = 1; + arg = -arg; + } + arg = modf(arg, &fi); + p1 = &buf[CVTBUFSIZE]; + + if (fi != 0) + { + p1 = &buf[CVTBUFSIZE]; + while (fi != 0) + { + fj = modf(fi / 10, &fi); + *--p1 = (int)((fj + .03) * 10) + '0'; + r2++; + } + while (p1 < &buf[CVTBUFSIZE]) *p++ = *p1++; + } + else if (arg > 0) + { + while ((fj = arg * 10) < 1) + { + arg = fj; + r2--; + } + } + p1 = &buf[ndigits]; + if (eflag == 0) p1 += r2; + *decpt = r2; + if (p1 < &buf[0]) + { + buf[0] = '\0'; + return buf; + } + while (p <= p1 && p < &buf[CVTBUFSIZE]) + { + arg *= 10; + arg = modf(arg, &fj); + *p++ = (int) fj + '0'; + } + if (p1 >= &buf[CVTBUFSIZE]) + { + buf[CVTBUFSIZE - 1] = '\0'; + return buf; + } + p = p1; + *p1 += 5; + while (*p1 > '9') + { + *p1 = '0'; + if (p1 > buf) + ++*--p1; + else + { + *p1 = '1'; + (*decpt)++; + if (eflag == 0) + { + if (p > buf) *p = '0'; + p++; + } + } + } + *p = '\0'; + return buf; +} + +char *ecvt(double arg, int ndigits, int *decpt, int *sign) +{ + return cvt(arg, ndigits, decpt, sign, CVTBUF, 1); +} + +char *ecvtbuf(double arg, int ndigits, int *decpt, int *sign, char *buf) +{ + return cvt(arg, ndigits, decpt, sign, buf, 1); +} + +char *fcvt(double arg, int ndigits, int *decpt, int *sign) +{ + return cvt(arg, ndigits, decpt, sign, CVTBUF, 0); +} + +char *fcvtbuf(double arg, int ndigits, int *decpt, int *sign, char *buf) +{ + return cvt(arg, ndigits, decpt, sign, buf, 0); +}