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, 34 insertions, 0 deletions

diff --git a/firmware/octoclock/include/usart.h b/firmware/octoclock/include/usart.h
new file mode 100644
index 000000000..35ee9eb95
--- /dev/null
+++ b/firmware/octoclock/include/usart.h
@@ -0,0 +1,34 @@
+/*
+ * 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/>.
+ */
+
+#ifndef _USART_H_
+#define _USART_H_
+
+#define USART_BAUDRATE 115200
+#define BAUD_PRESCALE 3
+
+void usart_init(void);
+
+char usart_getc(void);
+
+char usart_getc_noblock(void);
+
+void usart_putc(char ch);
+
+void usart_putc_nowait(char ch);
+
+#endif /* _USART_H_ */