代码如下：
unsigned char CalTempFromADCResult(unsigned int TempADCResult)
{
unsigned char CalTemp;
signed int tempvalue;
signed int temp2;
tempvalue=(int)(((float)TempADCResult/100.0)*((float) SystemPara.TempS));
temp2=SystemPara.TemperOffset;
tempvalue-=temp2;
CalTemp=(unsigned char)tempvalue;
return CalTemp;
}
我把SystemPara.TemperOffset付给temp2,temp2的类型和SystemPara.TemperOffset一样。SystemPara.TemperOffset的值为307，
为什么赋值给temp2，而temp2的值为51或-205，51是305的高8位全变成0，-205高8位全为1。而低8位不变。用的是C8051F413。编译器为KEIL-C。搞了一整天也看不出哪儿有错！不会是编译器问题吧！
大伙帮我看看啊！
SystemPara的声明如下
typedef struct
{
unsigned char Mode1; //0
unsigned char Mode2; //1
unsigned int Modset;//2,3
unsigned int APCset;// 4,5
signed int TemperOffset;//6,7
unsigned char TempS; //8
unsigned char SupplyO; //9
unsigned char VcompS; //10
unsigned char KFactorSH; //11
unsigned char KFactorSL; //12
unsigned char K2Temp; //13
unsigned int TemperV; //14,15 ADC temperature result
unsigned int SupplyV; //16,17 ADC supply result
unsigned int IBiasV; //18,19 ADC bias current result
unsigned int Imd1V; //20, 21 ADC monitor current result
unsigned int RSSIV; //22,23 ADC RSSI result
unsigned char CalTemp; //24
//unsigned int Biasset; // for test
} SysPara;
|
楼主
标题置顶
标题高亮
