On Thu, Feb 14, 2008 at 12:06:34PM -0500, [EMAIL PROTECTED] wrote: > 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
First off please note that readable registers and writable registers are in two different, non-overlapping address spaces. If you create a readable register, you can read it's value using v = u._read_fpga_reg (int regno) Eric > > [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
