1 files changed, 47 insertions, 0 deletions
diff --git a/firmware/microblaze/lib/ad9777.c b/firmware/microblaze/lib/ad9777.c
new file mode 100644
index 000000000..734ccd7e5
--- /dev/null
+++ b/firmware/microblaze/lib/ad9777.c
@@ -0,0 +1,47 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ *
+ * 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 "ad9777.h"
+#include "memory_map.h"
+#include "spi.h"
+
+#define	IB_RD   	0x80
+#define	IB_WR		0x00
+#define	IB_XFER_1	0x00
+#define	IB_XFER_2	0x20
+#define	IB_XFER_3	0x40
+#define	IB_XFER_4	0x60
+#define	IB_ADDR_MASK	0x1f
+
+void    
+ad9777_write_reg(int regno, uint8_t value)
+{
+  uint8_t instr = IB_WR | IB_XFER_1 | (regno & IB_ADDR_MASK);
+  spi_transact(SPI_TXONLY, SPI_SS_AD9777,
+	       (instr << 8) | (value & 0xff), 16, SPIF_PUSH_FALL);
+}
+
+int
+ad9777_read_reg(int regno)
+{
+  uint8_t instr = IB_RD | IB_XFER_1 | (regno & IB_ADDR_MASK);
+  uint32_t r = spi_transact(SPI_TXRX, SPI_SS_AD9777,
+			    (instr << 8) | 0, 16,
+			    SPIF_PUSH_FALL | SPIF_LATCH_RISE);
+  return r & 0xff;
+}