usrp1: reworked the io_impl for usrp1 to use the vrt packet handler

used dummy packers and unpackets that have a header size of zero

created wrapper around the data transport to handle non-512 multiple sends

honor the eob flag on send to flush the send buffer

1 files changed, 10 insertions, 2 deletions

diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp
index f5e423654..3ea35f970 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.hpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.hpp
@@ -91,8 +91,16 @@ public:
                 recv_mode_t,
                 size_t timeout);
 
-    size_t get_max_send_samps_per_packet(void) const { return 0; }
-    size_t get_max_recv_samps_per_packet(void) const { return 0; }
+    static const size_t BYTES_PER_PACKET = 512*4; //under the transfer size
+
+    size_t get_max_send_samps_per_packet(void) const {
+        return BYTES_PER_PACKET/_tx_otw_type.get_sample_size();
+    }
+
+    size_t get_max_recv_samps_per_packet(void) const {
+        return BYTES_PER_PACKET/_rx_otw_type.get_sample_size();
+    }
+
     bool recv_async_msg(uhd::async_metadata_t &, size_t);
 
 private: