Hello > I'm also going to look at another option which is with the mmap kernel I > have access to the FPGA memory in /dev/roach/mem. I think it should > be fairly easy to write a custom server that runs on the roach that > collects the bram data from the mem and then buffers if for sending > over ethernet via udp. This is probably very similar to what the UDP > option in tcpborphserver does but I'll be able to control the amount > of buffering
So tcpborphserver3 provides a function register_every_ms_katcp(d, period, &callback, localstate); which will arrange to call callback every period ms with a pointer localstate. In that callback function you should be able to read from the fpga and buffer/send out udp data at the rate you wish (fpga can be found at raw_mode->r_map) I'd recommend that you have a setup function (the one which sets up localstate and calls register_every_ms_katcp). This function should have the prototype int your_cmd(struct katcp_dispatch *d, int argc) if that is the case, you can add a call register_flag_mode(d, "?your-cmd", "helpmessage", &your_cmd, 0, TBS_MODE_RAW); and then you'll have an extra command which will launch your data dumping logic to run periodically. The tgtap routines use this approach - the end of tg.c shows this. regards marc
