From 012d333c8ef61f5bf53559d00d984a82d608c1d6 Mon Sep 17 00:00:00 2001
From: Laurent <laurent.thomas@open-cells.com>
Date: Fri, 10 Feb 2017 17:08:28 +0100
Subject: [PATCH] tune USRP/USB packet size
---
targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
index 2ac70b2d826..b2b386ba7d1 100644
--- a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+++ b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
@@ -662,14 +662,18 @@ extern "C" {
// create tx & rx streamer
uhd::stream_args_t stream_args_rx("sc16", "sc16");
int samples=openair0_cfg[0].sample_rate;
- //while ( samples > s->rx_stream->get_max_num_samps())
- samples/=24000;
- stream_args_rx.args["spp"] = str(boost::format("%d") % samples );
+ int max=s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps();
+ samples/=10000;
+ LOG_I(PHY,"RF board max packet size %u, size for 100µs jitter %d \n", max, samples);
+ if ( samples < max )
+ stream_args_rx.args["spp"] = str(boost::format("%d") % samples );
+ LOG_I(PHY,"rx_max_num_samps %u\n",
+ s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps());
+
for (int i = 0; i<openair0_cfg[0].rx_num_channels; i++)
stream_args_rx.channels.push_back(i);
s->rx_stream = s->usrp->get_rx_stream(stream_args_rx);
- LOG_I(PHY,"rx_max_num_samps %u\n",s->rx_stream->get_max_num_samps());
-
+
uhd::stream_args_t stream_args_tx("sc16", "sc16");
for (int i = 0; i<openair0_cfg[0].tx_num_channels; i++)
stream_args_tx.channels.push_back(i);
--
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