Embedded Programming with Modern C++ Cookbook

How it works...

When you run the binary, you will see the following output:

In this simple program, we're simulating communication with an external device. Since we don't have a real device, the SendDataToDevice function just prints the size of the data it is supposed to send to the target device.

Suppose the device can operate on chunks of data of a variable size. Each chunk of data is prepended by its size and encoded as a 32-bit unsigned integer. This can be described as follows:

Size	Payload
0-4 bytes	5 - N bytes, where N is Size

 

In our code, we declare size as uint32_t:

  uint32_t size = sizeof(buffer);

This means that it will ...