Darnell:
I have a couple of comments in addition to Ray's.
1.) atof()
Ray mentions atof(). You are calling it in the code you posted, but you're ignoring the results.
As Ray posted, the prototype for atof is as follows.
double atof ( const char * str );
The format of the prototype shows that atof takes as string input (const char * str) and returns a double output. The original string is unchanged and is still a string. In order to use the double return value, you need to assign the atof() return to it.
For example:
double myDouble;
char myString[] = "3.14159"
myDouble = atof(myString);
2.) array subscript i
Where is your loop? You initialize
int i=0;
but then you don't have a loop where you increment i.
You set
sCurrentPositionX[i]=g_sRcvData[i];
but then you take
atof(sCurrentPositionX);
not sCurrentPositionX[i]
3.) double as pointer
It looks like dNewPosX is a real position, but then in your Fmt statement, you treat it as a pointer.
Fmt(sAZXRelativeMove,"%f",*dNewPosX);
That syntax says that *dNewPosX is a float, so dNewPosX is a pointer to a float. Is it? If not, delete the * in *dNewPosX.
4.) Fmt vs. sprintf
Fmt (a CVI library function) and sprintf (an ANSI C library function) both provide formatted conversion. Why use them both? I have a personal preference for sticking to the ANSI C functions as much as possible to make my code more portable.
You could combine your two statements into one.
Instead of
Fmt(sAZXRelativeMove,"%f",*dNewPosX);
sprintf(sCrtCmd,"SERVO, WRITE, 098000034, %s",sAZXRelativeMove);
use
sprintf(sCrtCmd,"SERVO, WRITE, 098000034, %f",dNewPosX);
5.) READ command response
You send a READ command using Send_SERVO_Command(). What do you need to do to read the response?
6.) HTML code in your post
Ray mentions seeing the HTML code in your post (for example body { margin: 0 0 0 0; padding:0 0 0 0 }). I see it too, and have seen it in several of your previous posts. Do you see it too? It makes your post pretty hard to read. If you see that junk right after you post a message, click on the Options menu in the bar right above your message, and select Edit. Edit is only available for a short period of time after you post, but it gives you another chance to clean up your posts.
