multi_usrp_rfnoc: Manually pass sample rate to ddc/duc

This adds (and calls) methods to manually pass radio block sample rate
to the input/output properties of the ddc/duc during creation of the
multi_usrp_rfnoc object. The ddc/duc require this information in order
to return valid, possible output/input sample rates in
get_rx_rates()/get_tx_rates().

Before, the ddc/duc wouldn't have this rate until the rfnoc_graph had
been connected and committed, which happens in
get_rx_stream()/get_tx_stream(). Thus, this fixes an issue where a user
was unable to query possible sample rates prior to specifying a sample
rate and creating a stream.

2 files changed, 14 insertions, 0 deletions

diff --git a/host/include/uhd/rfnoc/ddc_block_control.hpp b/host/include/uhd/rfnoc/ddc_block_control.hpp
index 88c7ce106..f4197dd55 100644
--- a/host/include/uhd/rfnoc/ddc_block_control.hpp
+++ b/host/include/uhd/rfnoc/ddc_block_control.hpp
@@ -89,6 +89,13 @@ public:
      */
     virtual double get_input_rate(const size_t chan) const = 0;
 
+    /*! Manually set the sampling rate at this block's input
+     *
+     * \param rate The requested rate
+     * \param chan The channel for which the rate is being set
+     */
+    virtual void set_input_rate(const double rate, const size_t chan) = 0;
+
     /*! Return the sampling rate at this block's output
      *
      * This is equivalent to calling get_input_rate() divided by the decimation.
diff --git a/host/include/uhd/rfnoc/duc_block_control.hpp b/host/include/uhd/rfnoc/duc_block_control.hpp
index fcf15068e..4cf8a8fb8 100644
--- a/host/include/uhd/rfnoc/duc_block_control.hpp
+++ b/host/include/uhd/rfnoc/duc_block_control.hpp
@@ -97,6 +97,13 @@ public:
      */
     virtual double get_output_rate(const size_t chan) const = 0;
 
+    /*! Manually set the sampling rate at this block's output
+     *
+     * \param rate The requested rate
+     * \param chan The channel for which the rate is being set
+     */
+    virtual void set_output_rate(const double rate, const size_t chan) = 0;
+
     /*! Return a range of valid input rates, based on the current output rate
      *
      * Note the return value is only valid as long as the output rate does not