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Programming the Ethernet controller (view source)
Revision as of 17:18, 13 November 2007
, 17:18, 13 November 2007no edit summary
The modules involved in communication with with the Ethernet Controller chip as a means of bridging computer instructions with the on-board sensors serve as the core of the FPGA. The different tasks that need to be performed by these modules include
* executing the complex board reset and address lookup sequence
* polling for new packets and switching execution accordingly
* collecting sensor information upon a status report request
* programming the DAC upon a program packet receipt
* building return packets
In our design, the modules involved with packet handling and interfacing with sensor chip controllers are organized by ''state''. A state register specifies the current stage of the process and only the corresponding module is allowed to act during that stage. Aside from defining a process sequence, the state serves as a complex "enable" signal for the modules, ensuring that only one module is driving the communication bus used to query the Ethernet Controller chip.
= Interface =
= Interface =