Need to measure chip temperature and found two implementations of ADC_GetCurrentTS function. The first is:
UINT8 ADC_GetCurrentTS( UINT16 ts_v )
{
UINT16 vol_ts;
UINT16 D85_tem, D85_vol, D25;
vol_ts = (ts_v*1060)>>11;
D85_tem = (UINT16)((*((PUINT32)ROM_TMP_85C_ADDR)>>16)&0x00ff);
D85_vol = *((PUINT16)ROM_TMP_85C_ADDR);
D25 = *((PUINT32)ROM_TMP_25C_ADDR);
return ( D85_tem - ( D85_vol - vol_ts + 8 ) * 16 / D25 );
}
The second is:
int ADC_GetCurrentTS( UINT16 ts_v )
{
UINT16 vol_ts;
UINT16 D85_tem, D85_vol;
UINT16 D25_tem, D25_vol;
UINT16 temperK;
UINT32 temp;
UINT8 sum, sumck;
int cal;
temperK = 64; // mV/16^C
vol_ts = (ts_v*1060)>>11;
temp = (*((PUINT32)ROM_TMP_25C_ADDR));
D25_tem = temp;
D25_vol = (temp>>16);
if( D25_vol != 0 ){ // ????????????
// T = T85 + (V-V85)*16/D25
cal = (D25_tem*temperK + vol_ts*16 + (temperK>>1) - D25_vol*16) / temperK ;
return ( cal );
}
else{ // ???????????? D25_tem
temp = (*((PUINT32)ROM_TMP_85C_ADDR));
sum = (UINT8)(temp>>24); // ×???×???
sumck = (UINT8)(temp>>16);
sumck += (UINT8)(temp>>8);
sumck += (UINT8)temp;
if( sum != sumck ) return 0xff; // ???é?????í
temperK = D25_tem; // D25_tem = temperK
D85_tem = (UINT16)((temp>>16)&0x00ff);
D85_vol = (UINT16)temp;
// T = T85 + (V-V85)*16/D25
cal = (D85_tem*temperK + vol_ts*16 + (temperK>>1) - D85_vol*16) / temperK ;
return ( cal );
}
}
Which is better/more correct?
