3 files changed, 21 insertions, 7 deletions
diff --git a/host/lib/usrp/dboard_eeprom.cpp b/host/lib/usrp/dboard_eeprom.cpp
index 5ce0b2328..00236c337 100644
--- a/host/lib/usrp/dboard_eeprom.cpp
+++ b/host/lib/usrp/dboard_eeprom.cpp
@@ -17,10 +17,14 @@
 
 #include <uhd/usrp/dboard_eeprom.hpp>
 #include <uhd/utils/assert.hpp>
+#include <boost/format.hpp>
+#include <iostream>
 
 using namespace uhd;
 using namespace uhd::usrp;
 
+static const bool _dboard_eeprom_debug = false;
+
 ////////////////////////////////////////////////////////////////////////
 // format of daughterboard EEPROM
 // 00: 0xDB code for ``I'm a daughterboard''
@@ -55,14 +59,23 @@ using namespace uhd::usrp;
 
 //negative sum of bytes excluding checksum byte
 static boost::uint8_t checksum(const byte_vector_t &bytes){
-    int sum;
-    for (size_t i = 0; i < DB_EEPROM_CHKSUM; i++){
-        sum += int(bytes.at(i));
+    int sum = 0;
+    for (size_t i = 0; i < std::min(bytes.size(), size_t(DB_EEPROM_CHKSUM)); i++){
+        sum -= int(bytes.at(i));
     }
-    return (-sum) & 0xff;
+    if (_dboard_eeprom_debug)
+        std::cout << boost::format("sum: 0x%02x") % sum << std::endl;
+    return boost::uint8_t(sum);
 }
 
 dboard_eeprom_t::dboard_eeprom_t(const byte_vector_t &bytes){
+    if (_dboard_eeprom_debug){
+        for (size_t i = 0; i < bytes.size(); i++){
+            std::cout << boost::format(
+                "eeprom byte[0x%02x] = 0x%02x") % i % int(bytes.at(i)
+            ) << std::endl;
+        }
+    }
     try{
         ASSERT_THROW(bytes.size() >= DB_EEPROM_CLEN);
         ASSERT_THROW(bytes[DB_EEPROM_MAGIC] == DB_EEPROM_MAGIC_VALUE);
diff --git a/host/lib/usrp/dboard_manager.cpp b/host/lib/usrp/dboard_manager.cpp
index 06f8c55b6..34b635934 100644
--- a/host/lib/usrp/dboard_manager.cpp
+++ b/host/lib/usrp/dboard_manager.cpp
@@ -177,10 +177,11 @@ static args_t get_dboard_args(
 
     //verify that there is a registered constructor for this id
     if (not get_id_to_args_map().has_key(dboard_id)){
-        throw std::runtime_error(str(
+        /*throw std::runtime_error(str(
             boost::format("Unregistered %s dboard id: %s")
             % xx_type % dboard_id::to_string(dboard_id)
-        ));
+        ));*/
+        return get_dboard_args(dboard_id::NONE, xx_type);
     }
 
     //return the dboard args for this id
diff --git a/host/lib/usrp/usrp2/dboard_impl.cpp b/host/lib/usrp/usrp2/dboard_impl.cpp
index 043609458..a68ae240e 100644
--- a/host/lib/usrp/usrp2/dboard_impl.cpp
+++ b/host/lib/usrp/usrp2/dboard_impl.cpp
@@ -136,7 +136,7 @@ void usrp2_impl::rx_dboard_set(const wax::obj &key, const wax::obj &val){
 
     case DBOARD_PROP_DBOARD_ID:
         _rx_db_eeprom.id = val.as<dboard_id_t>();
-        _iface->write_eeprom(I2C_ADDR_RX_DB, 0, _tx_db_eeprom.get_eeprom_bytes());
+        _iface->write_eeprom(I2C_ADDR_RX_DB, 0, _rx_db_eeprom.get_eeprom_bytes());
         return;
 
     default: UHD_THROW_PROP_READ_ONLY();