1 files changed, 42 insertions, 0 deletions
diff --git a/firmware/zpu/lib/ad9510.c b/firmware/zpu/lib/ad9510.c
new file mode 100644
index 000000000..4d3acb65d
--- /dev/null
+++ b/firmware/zpu/lib/ad9510.c
@@ -0,0 +1,42 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 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 "ad9510.h"
+#include "spi.h"
+#include <memory_map.h>
+
+#define RD (1 << 15)
+#define WR (0 << 15)
+
+void
+ad9510_write_reg(int regno, uint8_t value)
+{
+  uint32_t inst = WR | (regno & 0xff);
+  uint32_t v = (inst << 8) | (value & 0xff);
+  spi_transact(SPI_TXONLY, SPI_SS_AD9510, v, 24, SPIF_PUSH_FALL);
+}
+
+int
+ad9510_read_reg(int regno)
+{
+  uint32_t inst = RD | (regno & 0xff);
+  uint32_t v = (inst << 8) | 0;
+  uint32_t r = spi_transact(SPI_TXRX, SPI_SS_AD9510, v, 24,
+			    SPIF_PUSH_FALL | SPIF_LATCH_FALL);
+  return r & 0xff;
+}