How to call/use function

Hi,

I will set the pretext:

Code:

---

typedef struct
  {
  ubyte
    command;
  ubyte
    data_length;
  ubyte
    data[MAX_DATA_LENGTH];
  WORD_UNION
    CRC;
  }COMMAND_PACKET;

void send_packet(COMMAND_PACKET *packet);

---

How would I call/use the function send_packet() in the main()

Can you give me an example of using it?

Thanks

Something like this:

Code:

---

int main()
{
    COMMAND_PACKET package;
    package.command = some_value;

    send_packet(&package);
    return 0;
}

---

Thank you Ideswa. That worked a charm.

But I have another question:

Code:

---

//============================================================================
// 631_WinTest Code.
// Copyright 2001-2004, Crystalfontz America, Inc. Written by Brent A. Crosby
//
// You may use this code in any project (including commercial) as long as
// at least one of the intents of the project is to communicate with a
// Crystalfontz display.
//
// http://www.crystalfontz.com [email protected]
//============================================================================
typedef unsigned char ubyte;
typedef signed char sbyte;
typedef unsigned short word;
typedef unsigned long dword;
typedef union
  {
  ubyte
    as_bytes[2];
  word
    as_word;
  } WORD_UNION;

typedef struct
  {
  ubyte
    command;
  ubyte
    data_length;
  ubyte
    data[MAX_DATA_LENGTH];
  WORD_UNION
    CRC;
  }COMMAND_PACKET;

---

I want to be able to write:

Code:

---

COMMAND_PACKET *packet;
packet->CRC->as_word = //return of some function

---

but it will not compile?

Do you know how to fix this?

Probably because you CRC isn't a pointer? So you should use

Code:

---

packet->CRC.as_word = ...

---

Edit: Also, your packet, as defined above, does not have any memory assigned to it, so CRC and any other members of the COMMAND_PACKET doesn't actually exist. Only a pointer to hold the address WHEN it gets created exists.

--
Mats