ICP DAS
LinPAC-52xx Series XV-Board API User Manual
14
Example:
int RetValue, comport=COM1, count=4;
int addr=32;
/* Refer to [Remark 1] */
char szBuf[80];
DWORD baudrate=115200;
/* Open the device file */
RetValue=Open_Com(comport, baudrate, Data8Bit, NonParity, OneStopBit);
if (RetValue > 0) {
printf("open
COM%d
failed!\n",comport);
return
FAILURE;
}
memset(szBuf, 0, sizeof(szBuf));
RetValue=getXVBit(comport, addr, count, szBuf, sizeof(szBuf));
Close_Com(comport);
if (RetValue==0) {
if(count<=8)
{
printf("%d",
szBuf[0]);
} else if (count<=16){
dwValue=(szBuf[1]<<8)|szBuf[0];
printf("%u",
dwValue);
} else {
dwValue=(szBuf[3]<<24)|(szBuf[2]<<16)|(szBuf[1]<<8)|szBuf[0];
printf("%lu",
dwValue);
}
}
Remarks:
[1] This is the input value reference address mapping (Modbus register table) for the '
wAddr
'
parameter.
More information regarding address mapping can be found at:
http://ftp.icpdas.com.tw/pub/cd/linpac/napdos/lp-5000/lp-52xx/lp-5231/user_manual/xv-boar
