BL4S100 User’s Manual
97
5.2 TCP/IP Sample Programs
We have provided a number of sample programs demonstrating various uses of TCP/IP for
networking embedded systems. These programs require that you connect your PC and the
BL4S100 together on the same network. This network can be a local private network (pre-
ferred for initial experimentation and debugging), or a connection via the Internet.
5.2.1 How to Set IP Addresses in the Sample Programs
With the introduction of Dynamic C 7.30 we have taken steps to make it easier to run
many of our sample programs. You will see a
TCPCONFIG
macro. This macro tells Dynamic
C to select your configuration from a list of default configurations. You will have three
choices when you encounter a sample program
with the
TCPCONFIG
macro.
1. You can replace the
TCPCONFIG
macro with individual
MY_IP_ADDRESS
,
MY_NETMASK
,
MY_GATEWAY
, and
MY_NAMESERVER
macros in each program.
2. You can leave
TCPCONFIG
at the usual default of 1, which will set the IP configurations to
10.10.6.100
, the netmask to
255.255.255.0
, and the nameserver and gateway to
10.10.6.1
. If you
would like to change the default values, for example, to use an IP address of
10.1.1.2
for
the BL4S100 board, and
10.1.1.1
for your PC, you can edit the values in the section that
directly follows the “General Configuration” comment in the
TCP_CONFIG.LIB
library. You
will find this library in the
LIB\TCPIP
directory.
3. You can create a
CUSTOM_CONFIG.LIB
library and use a
TCPCONFIG
value greater than 100.
Instructions for doing this are at the beginning of the
TCP_CONFIG.LIB
library in the
LIB\TCPIP
directory
.
There are some other “standard” configurations for
TCPCONFIG
that let you select different
features such as DHCP. Their values are documented at the top of the
TCP_CONFIG.LIB
library in the
LIB\TCPIP
directory
. More information is available in the
Dynamic C TCP/IP
User’s Manual
.
