b200: throw exception when master clock rate (tick rate) is requested to be > max for certain # of channels (i.e. restrict to 30.72MHz for MIMO)

Also includes sscanf type fix in b200_impl and longer timeout for AD9361 read

1 files changed, 20 insertions, 2 deletions

diff --git a/host/lib/usrp/b200/b200_impl.cpp b/host/lib/usrp/b200/b200_impl.cpp
index 8ed8e99af..3edd12b90 100644
--- a/host/lib/usrp/b200/b200_impl.cpp
+++ b/host/lib/usrp/b200/b200_impl.cpp
@@ -156,8 +156,8 @@ b200_impl::b200_impl(const device_addr_t &device_addr)
     const fs_path mb_path = "/mboards/0";
 
     //try to match the given device address with something on the USB bus
-    uint16_t vid = B200_VENDOR_ID;
-    uint16_t pid = B200_PRODUCT_ID;
+    unsigned int vid = B200_VENDOR_ID;
+    unsigned int pid = B200_PRODUCT_ID;
     if (device_addr.has_key("vid"))
             sscanf(device_addr.get("vid").c_str(), "%x", &vid);
     if (device_addr.has_key("pid"))
@@ -659,9 +659,27 @@ void b200_impl::codec_loopback_self_test(wb_iface::sptr iface)
 /***********************************************************************
  * Sample and tick rate comprehension below
  **********************************************************************/
+void b200_impl::enforce_tick_rate_limits(size_t chan_count, double tick_rate, const char* direction /*= NULL*/)
+{
+    const size_t max_chans = 2;
+    if (chan_count > max_chans)
+    {
+        throw uhd::value_error(boost::str(boost::format("cannot not setup %d %s channels (maximum is %d)") % chan_count % (direction ? direction : "data") % max_chans));
+    }
+    else
+    {
+        const double max_tick_rate = ((chan_count <= 1) ? AD9361_1_CHAN_CLOCK_RATE_MAX : AD9361_2_CHAN_CLOCK_RATE_MAX);
+        if (tick_rate > max_tick_rate)
+            throw uhd::value_error(boost::str(boost::format("current master clock rate (%.2f MHz) exceeds maximum possible master clock rate (%.2f MHz) when using %d %s channels") % (tick_rate/1e6) % (max_tick_rate/1e6) % chan_count % (direction ? direction : "data")));
+    }
+}
+
 double b200_impl::set_tick_rate(const double rate)
 {
     UHD_MSG(status) << "Asking for clock rate " << rate/1e6 << " MHz\n";
+
+    check_tick_rate_with_current_streamers(rate);   // Defined in b200_io_impl.cpp
+
     _tick_rate = _codec_ctrl->set_clock_rate(rate);
     UHD_MSG(status) << "Actually got clock rate " << _tick_rate/1e6 << " MHz\n";