Merge branch 'usrp_e' of git@ettus.sourcerepo.com:ettus/uhdpriv into usrp_e

1 files changed, 102 insertions, 0 deletions

diff --git a/host/lib/usrp/dboard_eeprom.cpp b/host/lib/usrp/dboard_eeprom.cpp
new file mode 100644
index 000000000..54e7a4fd9
--- /dev/null
+++ b/host/lib/usrp/dboard_eeprom.cpp
@@ -0,0 +1,102 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#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''
+// 01:   .. Daughterboard ID (LSB)
+// 02:   .. Daughterboard ID (MSB)
+// 03:   .. io bits  7-0 direction (bit set if it's an output from m'board)
+// 04:   .. io bits 15-8 direction (bit set if it's an output from m'board)
+// 05:   .. ADC0 DC offset correction (LSB)
+// 06:   .. ADC0 DC offset correction (MSB)
+// 07:   .. ADC1 DC offset correction (LSB)
+// 08:   .. ADC1 DC offset correction (MSB)
+//  ...
+// 1f:   .. negative of the sum of bytes [0x00, 0x1e]
+
+#define DB_EEPROM_MAGIC         0x00
+#define DB_EEPROM_MAGIC_VALUE   0xDB
+#define DB_EEPROM_ID_LSB        0x01
+#define DB_EEPROM_ID_MSB        0x02
+#define DB_EEPROM_OE_LSB        0x03
+#define DB_EEPROM_OE_MSB        0x04
+#define DB_EEPROM_OFFSET_0_LSB  0x05 // offset correction for ADC or DAC 0
+#define DB_EEPROM_OFFSET_0_MSB  0x06
+#define DB_EEPROM_OFFSET_1_LSB  0x07 // offset correction for ADC or DAC 1
+#define DB_EEPROM_OFFSET_1_MSB  0x08
+#define DB_EEPROM_CHKSUM        0x1f
+
+#define DB_EEPROM_CLEN          0x20 // length of common portion of eeprom
+
+#define DB_EEPROM_CUSTOM_BASE   DB_EEPROM_CLEN // first avail offset for
+                                               //   daughterboard specific use
+////////////////////////////////////////////////////////////////////////
+
+//negative sum of bytes excluding checksum byte
+static boost::uint8_t checksum(const byte_vector_t &bytes){
+    int sum = 0;
+    for (size_t i = 0; i < std::min(bytes.size(), size_t(DB_EEPROM_CHKSUM)); i++){
+        sum -= int(bytes.at(i));
+    }
+    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{
+        UHD_ASSERT_THROW(bytes.size() >= DB_EEPROM_CLEN);
+        UHD_ASSERT_THROW(bytes[DB_EEPROM_MAGIC] == DB_EEPROM_MAGIC_VALUE);
+        UHD_ASSERT_THROW(bytes[DB_EEPROM_CHKSUM] == checksum(bytes));
+        id = \
+            (boost::uint16_t(bytes[DB_EEPROM_ID_LSB]) << 0) |
+            (boost::uint16_t(bytes[DB_EEPROM_ID_MSB]) << 8) ;
+    }catch(const uhd::assert_error &){
+        id = dboard_id::NONE;
+    }
+}
+
+byte_vector_t dboard_eeprom_t::get_eeprom_bytes(void){
+    byte_vector_t bytes(DB_EEPROM_CLEN, 0); //defaults to all zeros
+    bytes[DB_EEPROM_MAGIC] = DB_EEPROM_MAGIC_VALUE;
+    bytes[DB_EEPROM_ID_LSB] = boost::uint8_t(id >> 0);
+    bytes[DB_EEPROM_ID_MSB] = boost::uint8_t(id >> 8);
+    bytes[DB_EEPROM_CHKSUM] = checksum(bytes);
+    return bytes;
+}
+
+size_t dboard_eeprom_t::num_bytes(void){
+    return DB_EEPROM_CLEN;
+}