I've read that post before. It more or less gave me reassurances on what I had gathered that had to be done to implement a simple in-line multiplier in the TX chain. The post tells me what registers are readback, but not how to read them back. When I came across the post originally, it pointed me in the right direction to where I should connect the output of my new module.
-Kevin > [EMAIL PROTECTED] wrote: >> Hi, >> >> I'm having a little trouble reading the readback registers that are on >> the >> USRP. I know that most registers are write only with their contents >> mirrored on the computer. The reason I want read those registers back >> is >> because of a custom unit I am testing. I currently load a custom >> implementation on the USRP that consists of 1 TX chain and 2 custom >> units, >> one of which feeds back information into the unused readback ports >> (rssi0 >> to rssi3). I'm able to read from the capabilities register using >> '_read_fpga_register(FR_RB_CAPS)' and it returns a value that makes >> sense. >> When I try reading from any other register, the value returned is >> consistently '0'. I'm reading the registers in a loop in case the value >> changes after a given amount of time. I'm not sure what to try next, >> can >> someone give me a new direction? >> >> -Kevin > > This post might help: > > http://lists.gnu.org/archive/html/discuss-gnuradio/2007-05/msg00356.html > > -Roshan > _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
