Download Wireless Ethernet LAN Adaptor

3.1.5
ETHERNET INTERFACE
The Ethernet Interface module contains of four API functions and one interrupt routine.
Eth_send() sends the data in the current Ethernet Tx buffer. Eth_recv() polls the empty bit
of the current RxBD and returns the current Rx buffer if a new packet has arrived.
Eth_setRxBufferEmpty() sets the current Rx BD’s empty flag. Eth_getTxBuffer() gets the
current Tx buffer if it is ready for use. The interrupt routine will be executed after a packet
has been received from the computer into the Ethernet Interface. During the execution of
this interrupt, the Copy Module will be notified that a new packet has been received and
increment a counter that keep tracks of total number of packets stored in the Receive Buffer.
3.1.6
SERIAL INTERFACE
The serial Interface module contains four API functions. Ser_send() sends the data in the
current serial Tx buffer. Ser_recv() polls the data ready bit of the current serial status
register, and copy the current byte to receive buffer in main memory. It keeps copying new
serial bytes to receive buffer until the EOS is detected. Eth_setRxBufferEmpty() sets the
current Rx BD’s empty flag. Eth_getTxBuffer() gets the current Tx buffer if it is ready for
use. The interrupt routine will be executed after a packet has been received from the
computer into the Ethernet Interface. During this interrupt routine, the Copy Module will
be notified about the data length of this new set of serial data for the reconstruction of
different sets of serial data into one complete packet.
3.1.7
GETLOCALIP PROCEDURE
This feature is not implemented yet at this point in time.
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