OctoClock firmware upgrade, added host driver

* OctoClock can communicate with UHD over Ethernet
* Can read NMEA strings from GPSDO and send to host
* Added multi_usrp_clock class for clock devices
* uhd::device can now filter to return only USRP devices or clock devices
* New OctoClock bootloader can accept firmware download over Ethernet
* Added octoclock_burn_eeprom,octoclock_firmware_burner utilities
* Added test_clock_synch example to show clock API

1 files changed, 37 insertions, 0 deletions

diff --git a/firmware/octoclock/lib/gpsdo.c b/firmware/octoclock/lib/gpsdo.c
new file mode 100644
index 000000000..a6a7daaca
--- /dev/null
+++ b/firmware/octoclock/lib/gpsdo.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2014 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 <avr/interrupt.h>
+
+#include <octoclock.h>
+#include <gpsdo.h>
+#include <usart.h>
+
+void send_gpsdo_cmd(char* buf, uint8_t size){
+    for(uint8_t i = 0; i < size; i++) usart_putc(buf[i]);
+}
+
+//Serial out
+ISR(USART1_RX_vect){
+    gpsdo_buf[gpsdo_state.pos] = UDR1;
+
+    if(gpsdo_state.pos == (POOLSIZE-1)){
+        gpsdo_state.num_wraps++;
+        gpsdo_state.pos = 0;
+    }
+    else gpsdo_state.pos++;
+}