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maw41 Report

04

Feb

2013

I've now managed to join up the system to the FPGA so you can configure the NTP core from linux running on the zedboard. The configuration registers are now connected to the ntp core and so it doesn't send bad packets when a settings changes, the changes in the registers only apply to the ntp core when it's in an idle state (interframe gap). The settings can be changed easily from a little c program I wrote which uses Jack's driver to talk to the registers in the FPGA. We had to make a few changes to the driver so it supports lseek and writes the bytes in the correct order for the hardware to use the data correctly. Now the biggest set back is getting the GPS interface working.We've already spent a while on this but trying to find out where the problem is, is taking a while.