对908QY4编程,能否使用浮点数计算.编程环境是CodeWarrior 5.1
下面是我的部分程序：
{ const float C1=-4.0; //
const float C2=+0.0405; //
const float C3=-0.0000028; //
const float T1=+0.01; //
const float T2=+0.00008; //
float rh=*p_humidity; // rh: Humidity [Ticks] 12 Bit
float t=*p_temperature; // t: Temperature [Ticks] 14 Bit
float rh_lin; // rh_lin: Humidity linear
float rh_true; // rh_true: Temperature compensated humidity
float t_C; // t_C : Temperature
t_C=t*0.01 - 40; //clc. temperature from ticks to
rh_lin=C3*rh*rh + C2*rh + C1; //calc. humidity from ticks to [%RH]
rh_true=(t_C-25)*(T1+T2*rh)+rh_lin; //calc. temperature compensated humidity [%RH]
if(rh_true>100)rh_true=100; //cut if the value is outside of
if(rh_true<0.1)rh_true=0.1; //the physical possible range
*p_temperature=t_C; //return temperature
*p_humidity=rh_true; //return humidity[%RH]
} |
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