Ethernet Tx on Interrupt

[jiboy]

I have few questions on the Ethernet demo or Nt_demo project.

Currently i understand that the Tx part of the Ethernet demo is on polling inside a While(1) loop.

Can this be done on a SWI basis?

Also, which memory location should i write the data to, if I have to transfer data out on the Ethernet port?

Please advice as this is high priority for our project.

Additionally, I am using MSC8156 with SmartDSP OS support on ADS board.

Thanks,

jiboy

[AndrewinApps]

Hello Jiboy,

We have a # of ethernet demos, which one are you referring to?

The way the ethernet transmitter works is, it checks to see if there is a free Transmit buffer descriptor (while 1), and once a buffer descriptor is free, it writes to the buffer and then moves on. 

As long as you have an adequate # of buffer descriptors, adequate FIFO size for Ethernet, and your transmit rate is not over the maximum (described in the MSC8156 Ethernet Performance Application note available on our website), then the while loop will not actually be needed.

I would suggest referring to both the MSC8144 and MSC8156 Ethernet applicaiton notes. The SDOS structure and the QUICC Engine ethernet structure are the same for Ethernet between these 2 parts.

Regards,

-Andrew