System information

8.2 Network Card
Yapt
GUI
Intranet
Inet
Daemon
PCI Trace
Program
STDIN STDOUT
PORT
45000
CHARM
Remote Computer
TCP/IP
TCP/IP
TCP/IPTCP/IP
Stream
Figure 8.3: Data flow of Yapt and the PCI trace program. The Inet daemon builds a bridge
between the TCP stream of the Yapt software and the standard console stream
of the PCI trace program.
• Setup of the trigger conditions.
• Present the waveform output of the traced PCI signals.
• Allows signal filter of the traced PCI signals.
• Providing of time marker.
• Calculation of the period between the time markers.
• Save and load of the traced PCI signals to the hard disc.
8.2 Network Card
The CHARM card can also function as a network card. A network card or NIC (Network
Interface Controller) is the interface between the host computer and a network [100]. Figure
8.4 depicts a block diagram of an Ethernet card [101, 100].
Physical
Layer
Interface
FIFO
FIFO
Bus
Interface
Figure 8.4: Layout of a Network Interface Controller (NIC).
Generally, there are two interfaces of a NIC: a bus interface and a physical link interface.
The bus interface is used to transfer the network data between the host computer and the
NIC. The physical link interface forms the connection between the NIC and the network.
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