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11 years ago.

Error EthernetInterface Init function

I use board MCB1700 and Keil.

Compile TCPSocket_HelloWorld example in keil, I can't run it.

EthernetInterface eth; eth.init(); printf("Welcome!\n"); eth.connect();

Program loop forever in eth.init() function, can't run printf.

Question relating to:

Last updated: 30 Apr 2020

3 Answers

Wim Huiskamp
11 years ago.

The mbed code retrieves the ethernet MAC address through the USB/programming interface using semihost calls. This interface is not available on the Keil board and the software will hang. See http://mbed.org/forum/mbed/topic/972/?page=1#comment-10318 for examples on how to overrule these semihost calls and replace them with your own MAC address. 

extern "C" void mbed_mac_address(char * mac) {
 
// define your own MAC Address
  mac[0] = 0x00;  
  mac[1] = 0x01;  
  mac[2] = 0x02;  
  mac[3] = 0x03;  
  mac[4] = 0x04;  
  mac[5] = 0x05;           
  
};

Also note that their may be other hardware differences between the mbed and the Keil board that will prevent the mbed libs from working on the Keil.

Accepted Answer
Vedat A
11 years ago.

I tried it with mbed and it worked. Are you sure you don't have any connection problem with your LAN through your router ?

My system base on MCB1700 kit of keil.

Connection very good!

I also tried a example TCP client of TCP_CM3.lib keil, it wored and post data to server.

I tried library TCP - Ethernet Library mbed, example TCPSocket_HelloWorld, export to keil, compile , and it don't work.

Please me.

posted by thiencdcn thiencdcn 02 Dec 2013
thiencdcn thiencdcn
poster
11 years ago. 

extern "C" void mbed_mac_address(char * mac) {
 
// define your own MAC Address
  mac[0] = 0x00;  
  mac[1] = 0x01;  
  mac[2] = 0x02;  
  mac[3] = 0x03;  
  mac[4] = 0x04;  
  mac[5] = 0x05;           
  
};

It's worked.

Thanks.