> Eric Blossom wrote: > > On Wed, Jan 20, 2010 at 07:20:43PM +0100, Christoph Thein wrote: > >>> On 01/19/2010 10:35 AM, Christoph Thein wrote: > >>>>> On 01/19/2010 09:47 AM, Christoph Thein wrote: > >>>>>> Hi, > >>>>>> > >>>>>> is there a possibility to read the data coming from the auxiliary > >>>>>> ADC (AD7922) at the moment? I couldn't find any hint in the code or > >>>>>> on the mailing list that could point me to a good direction to > >>>>>> start. > >>>>>> > >>>>>> Just out of interest: What should the auxiliary DAC (AD5623) be used > >>>>>> for? > >> > >> The USRP1 uses the read_aux_adc function to get the values. Does the > >> read_gpio replace it for the USRP2? If not how is the USRP2 accessing > >> the aux ADC? > >> > >> Cheers, > >> Christoph > > > > At this point, firmware in the USRP2 controls the daughterboards, and > > the read_aux_adc functionality is not exported to the host. > > > > Eric > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > Does the firmware currently do anything with the Aux ADC? I see the > definitions for reading from the SPI controller, and the function > (firmware/lib/lsadc.c: lsadc_read_rx(int)) which appears to be the only > place that reads from the correct SPI device. Also, it looks like it > would be difficult to read the value directly from inside the FPGA: i.e. > if I wanted to use the RSSI value for an AGC or squelch control, I'd > probably be best served by periodically reading the value from within > the firmware, and pushing it back into a register in, e.g., dsp_rx_regs. > This would likely mean I'd have some additional inherent delay in using > the value in the DSP chain. Is there a better way - e.g. I assume it > would be possible to load the data from the SPI controller in the FPGA, > but does that come with a (much?) larger cost in terms of logic, and > therefore area/etc.? > Thanks, > Doug >
Hi, I am interested in logging the RSSI on the host's side. Therefore I am looking for a way to push the values from the firmware to the host. Does anybody have some insides how to access these registers (written with dsp_rx_regs from within the firmware like mentioned by Doug) from the host. I already looked at the read_gpio functions but got stucked, not knowing exactly if they can provide the wanted functionality. BR Christoph _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
