From f991d3dc751e110425d4a0eed722f6de0fef4261 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Sat, 14 May 2011 19:57:03 -0700
Subject: usrp1: apply conditional disables/enables to rx and tx

Scapped the old gnuradio code for information about VRQ_FPGA_SET_XX_ENABLE.
It turns out that we should disabled + restore state when changing muxes or rates.
The USRP seems to stream properly when receiving single and dual channel.

Prior to this commit, tx was accicentally always disabled from a few commits ago.
---
 host/lib/usrp/usrp1/usrp1_impl.hpp | 39 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'host/lib/usrp/usrp1/usrp1_impl.hpp')

diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp
index f53894b29..69ad9b0a0 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.hpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.hpp
@@ -205,6 +205,45 @@ private:
     size_t get_num_ddcs(void);
     bool has_rx_halfband(void);
     bool has_tx_halfband(void);
+
+    //handle the enables
+    bool _rx_enabled, _tx_enabled;
+    void enable_rx(bool enb){
+        _rx_enabled = enb;
+        _ctrl_transport->usrp_rx_enable(enb);
+    }
+    void enable_tx(bool enb){
+        _tx_enabled = enb;
+        _ctrl_transport->usrp_tx_enable(enb);
+    }
+
+    //conditionally disable and enable rx
+    bool disable_rx(void){
+        if (_rx_enabled){
+            enable_rx(false);
+            return true;
+        }
+        return false;
+    }
+    void restore_rx(bool last){
+        if (last != _rx_enabled){
+            enable_rx(last);
+        }
+    }
+
+    //conditionally disable and enable tx
+    bool disable_tx(void){
+        if (_tx_enabled){
+            enable_tx(false);
+            return true;
+        }
+        return false;
+    }
+    void restore_tx(bool last){
+        if (last != _tx_enabled){
+            enable_tx(last);
+        }
+    }
 };
 
 #endif /* INCLUDED_USRP1_IMPL_HPP */
-- 
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