This section describes all the steps required to build a DHCPc-based application. The instructions provided in this section are not intended for any particular toolchain, but instead are described in a generic way that can be adapted to any toolchain.
The best way to start building a DHCPc-based project is to start from an existing µC/TCP-IP project.
Working project with µC/TCP-IP
The first step before including the µC/DHCPc is to have a working project with the µC/TCP-IP. As previously mentioned, Micriµm may offer starting example with µC/OS-III kernels and µC/TCP-IP and even with µC/DHCPc for many evalboards.
If no project that include µC/TCP-IP is available, you should follow the µC/TCP-IP Getting Started Guide to ensure to have a working project which use fix IP address before installing µC/DHCPc. Then you can follow the following steps to build and run a first µC/DHCPc example application.
Including Additional Modules to the Project
Once you have a working project with your RTOS and µC/TCP-IP additional modules are needed by the Micriµm DHCP client that are not necessarily already included in your project. Therefore, be sure to add µC/CPU, µC/LIB, and µC/TCP-IP to your project.
Refer to the following manuals for further information about MIcrium modules:.
Including µC/DHCPc Source Code
Include the following files in your project tree from the µC/DHCPc source code distribution, as indicated in Figure - µC/DHCPc Source Code
As indicated in the Figure - µC/DHCPc Source Code, all the files in the Source folder must be added to your project tree. Furthermore, dhcp-c_os.c/h files of the selected RTOS must be added.
Compiler settings
Finally, add the following include paths to your project’s C compiler settings:
\Micrium\Software\uC-DHCPc
\Micrium\Software\uC-DHCPc\OS\<OS type>
\Micrium\Software\uC-TCPIP
\Micrium\Software\uC-<OS-Version>
Copying and Modifying Template Files
Copy the files from the uC-DHCPc configuration folder into your application as illustrated in
dhcp-c_cfg.h is a configuration file used to setup µC/DHCPc module static parameters and features such as ports, timeout,broadcast bit and so on. Refer to section Module Configuration for more details on all the configurations inside dhcp-c_cfg.h
Adding µC/DHCPc application function
Before running the example application, you will need to add the new funtion call, in your app.c file to initialize and setup the µC/DHCPc module. Section Example Application gives an example of how to initialize µC/DHCPc and start DHCP negotiation on an interface.
This code example will need to be modified in accordance with your project setup.
Adding Additional includes
Since the µC/TCP-IP module was added to the example project, the following include must be added to the app.c file :
#include <Source/dhcp-c.h>