trying to begin with a static IP after DHCP fails locks up the program

[jstamour802]

using the TM4C1294 connected launchpad..

My program stops working if DHCP fails and I try to begin with a static IP. If you try to call ethernet.begin(mac,IP) after DHCP fails, the program locks up.

The "DHCP chat server example" demonstrates this - if you have no DHCP it never begins with the static IP and moves beyond the setup loop

void setup() {
// open the serial port
Serial.begin(9600);
Serial.println("\n\nDhcpChatServer setup");
// start the Ethernet connection:
Serial.println("Trying to get an IP address using DHCP");
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// initialize the ethernet device not using DHCP**************never gets past this point!!!************
Ethernet.begin(mac, ip, gateway, subnet);
}
// print your local IP address:
Serial.print("My IP address: ");
ip = Ethernet.localIP();
for (byte thisByte = 0; thisByte < 4; thisByte++) {
// print the value of each byte of the IP address:
Serial.print(ip[thisByte], DEC);
Serial.print(".");
}
Serial.println();
// start listening for clients
server.begin();

}

[rei-vilo]

Which MCU?

[rei-vilo]

Thanks. So I guess you're using the CC3100 BoosterPack.

[jstamour802]

@rei-vilo I am using the TM4C1294XL connected launchpad and have this problem -- I'm not sure why @a-bhat1 changed the topic to something else..

[robertinant]

This issue was moved to energia/tivac-core#10