Hi Danny, Have you seen this page on the wiki? https://casper.berkeley.edu/wiki/FPGA_Device_Driver_Memo The example code in the links provided there worked well as a good starting point.
Glenn On Mon, Feb 16, 2015 at 10:04 PM, Danny Price <[email protected]> wrote: > Hi all > > I'd like to read data from the FPGA on the ROACH2 powerpc, then pack it > into UDP and send it out over Ethernet. Is there a straightforward and > reasonably efficient way to read registers/bram from the FPGA on the ROACH2 > powerpc? Better yet, has anyone implemented something already that they're > happy to share? We need a ~0.5MB transfer, triggered when a register is > incremented (once per second), so speed shouldn't be a major issue. > > I know on the ROACH1 the BRAMs were available in /proc, and that the new > tcpborphserver3 on the ROACH2 memory maps through the 'device nodes' in > /dev/roach, but I'm not clear on how to read desired registers on the PPC > though this... > > Thanks > Danny > >
