hi all,
please help me how to find the MAC address of a device for ethernet coding. and also please help how to set the MAC address.
we are using the LAN8720 IC for ethernet interface.
i am using the sample code of lpc1788 it is working in development board............ but its not working with the other lpc1788 controller board.
it is having the same pin connections as per development board schematic. it is showing connected but when we try to ping with the ip address of microcontoller ethernet it is not pinging...
its showing request timed out.
so how to resolve this.
Study carefully at the schematics, source code, and documentation of the working board until you understand how the MAC address is set, stored, and used.
Once you understand how the MAC address is set, stored, and used on the working board, you will be able to trace where that's going wrong on the oher board.
So your original question as made wasn't really relevant then. You have hardware that you don't know if it is correct or broken, and you have thrown in software that you don't understand in it.
Any code inside that board that is managing to make the board send something out, will result in packets that can be sniffed to know what MAC address that is used.
If you understand the code, then you should be able to know how to get the board to try to send something (assuming the hardware is actually working).
If you understand the code and hardware, then you should also be able to know if the code contains a hard-coded MAC address or if there is a MAC address stored in EEPROM or similar.
So why did you make a post where the only fact you bothered to give was "LAN8720" when you could have mentioned what development board you based your own hardware on. Or what software packet you downloaded into your board?
You often go into a car shop and demand to buy a spare part for your car, while refusing to tell them brand and model of car? You think that would be a working route to be able to actually get the correct spare part?