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Klondike - extra zero value and range checking in temp conversion

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This commit is contained in:
Kano 2013-10-04 10:57:07 +10:00
parent 44f96c64b2
commit 8e82da4320
1 changed files with 31 additions and 2 deletions
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33
driver-klondike.c
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@ -120,6 +120,9 @@ static double cvtKlnToC(uint8_t temp)
{ {
double Rt, stein, celsius; double Rt, stein, celsius;
if (temp == 0)
return 0.0;
Rt = 1000.0 * 255.0 / (double)temp - 1000.0; Rt = 1000.0 * 255.0 / (double)temp - 1000.0;
stein = log(Rt / 2200.0) / 3987.0; stein = log(Rt / 2200.0) / 3987.0;
@ -128,13 +131,39 @@ static double cvtKlnToC(uint8_t temp)
celsius = (1.0 / stein) - 273.15; celsius = (1.0 / stein) - 273.15;
// For display of bad data
if (celsius < 0.0)
celsius = 0.0;
if (celsius > 200.0)
celsius = 200.0;
return celsius; return celsius;
} }
static int cvtCToKln(double deg) static int cvtCToKln(double deg)
{ {
double R = exp((1/(deg+273.15)-1/(273.15+25))*3987)*2200; double Rt, stein, temp;
return 256*R/(R+1000);
if (deg < 0.0)
deg = 0.0;
stein = 1.0 / (deg + 273.15);
stein -= 1.0 / (double)(25.0 + 273.15);
Rt = exp(stein * 3987.0) * 2200.0;
if (Rt == -1000.0)
Rt++;
temp = 1000.0 * 256.0 / (Rt + 1000.0);
if (temp > 255)
temp = 255;
if (temp < 0)
temp = 0;
return (int)temp;
} }
static char *SendCmdGetReply(struct cgpu_info *klncgpu, char Cmd, int device, int datalen, void *data) static char *SendCmdGetReply(struct cgpu_info *klncgpu, char Cmd, int device, int datalen, void *data)