Accessing raw data bitwise.

Hi,

I just found this little scipt:

************************************************************

BYTE Raw[20];
BOOL RetVal;
WORD pValue;
BYTE *pByte;
int i;
char number[3],name[25];

for (i=0;i<=9;i++)
{
sprintf(name,"wort_%d",(i+1));
//strcpy(name,"wort_");
//strcat(name,number);

pValue=GetTagWord(name);
printf("%s\r\n",name);
printf("%d\r\n",pValue);
pByte =&pValue;
Raw[(2*i)+1]=*pByte;
pByte++;
Raw[(2*i)]=*pByte;
}

for(i=0;i<=19;i++)printf("Nummer%d:%x\r\n",i,Raw[i]);

RetVal=SetTagRawWait("TestRoh",Raw,20);
printf("RetVal:%d\r\n",RetVal);


**************************************************
nemo

Here's an example, to compose a tag to send info to the PLC.


void BsBx_MuxCmd(char* TagName, short Area, short Index, short Offset)
{
if ((Area >= 0) && (Area <= 999) && (Index >= 0) && (Index <= 49999) && (Offset >= 0) && (Offset <= 15)) // validates consistency of the information
SetTagDWord(TagName, ((Index<<16) +(Offset<<8) + Area)); //information valid - send to PLC
}


In this example, a project function receives the parameter TagName - name of the 32-bit tag which will be sent to the PLC, and the parameters Area, Index and Offset, which are the bits that will compose the information to be sent.
TagName's first 16 bits are the Index bits, then you have 8 bits for the Offset, and 8 bits for the Area.



Now if you receive data from the PLC:


struct Structure01
{
unsigned State1: 1;
unsigned State2: 1;
unsigned State3: 1;
unsigned State4: 1;
unsigned State5: 1;
unsigned State6: 1;
} Object01;

Object01 = (struct Structure01)GetTagByte("TagName");
if(Object01.State1) return 8; // returns proper state animation

In this example, the Byte type tag "TagName" contains the state bits for a certain object.