byte array pointer question

[andy.dreistadt]

Hi all,

I know this is a pretty easy question for most, but I haven't touched
C++ in 5 years and am a bit rusty.

I have the following set-up:

my_function(BYTE *buf,WORD len)
{
//some stuff

int num_bytes = serialSendRcv(0, buf, len, 5000);

//....more stuff
}


The problem is that the first byte of the buf array (buf[0]) is a
filter byte that I no longer need and do not want to pass to the
serialSendRcv() method. Instead, I would like to send it the array
containing buf[1]..buf[len]. I heard the best way to do this is to
dereference the array and increment the address, but I can't remember
how that's done.

Thanks in advance for any help you can give,

Andy

 

[Victor Bazarov]

I know this is a pretty easy question for most, but I haven't touched
C++ in 5 years and am a bit rusty.

I have the following set-up:

my_function(BYTE *buf,WORD len)
{
//some stuff

int num_bytes = serialSendRcv(0, buf, len, 5000);

What you are asking below is

int num_bytes = serialSendRcv(0, buf + 1, len - 1, 5000);

I have no idea what '0' and '5000' are supposed to mean and whether
they need to change as well.

//....more stuff
}


The problem is that the first byte of the buf array (buf[0]) is a
filter byte that I no longer need and do not want to pass to the
serialSendRcv() method. Instead, I would like to send it the array
containing buf[1]..buf[len]. I heard the best way to do this is to
dereference the array and increment the address, but I can't remember
how that's done.

Victor

 

[andy.dreistadt]

Victor,

It worked! Thanks again for your help.

Andy