1 files changed, 68 insertions, 0 deletions
diff --git a/firmware/microblaze/lib/lsdac.c b/firmware/microblaze/lib/lsdac.c
new file mode 100644
index 000000000..6bc2e5cb5
--- /dev/null
+++ b/firmware/microblaze/lib/lsdac.c
@@ -0,0 +1,68 @@
+/* -*- 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 "lsdac.h"
+#include "spi.h"
+#include "memory_map.h"
+
+// AD5624, AD5623
+
+#define CMD(x)		  ((x) << 19)
+#define CMD_WR_INPUT_N	     CMD(0)   // write input N
+#define	CMD_UP_DAC_N	     CMD(1)   // update DAC N from input reg
+#define CMD_WR_INPUT_N_LDAC  CMD(2)   // write input N, update all
+#define	CMD_WR_UP_DAC_N	     CMD(3)   // write and update N
+#define CMD_WR_PWR_CONFIG    CMD(4)   // write power up/down config reg
+#define	CMD_SW_RESET	     CMD(5)   // force s/w reset
+#define	CMD_WR_LDAC_CFG	     CMD(6)   // write LDAC config reg
+#define	CMD_WR_INT_REF_CFG   CMD(7)   // write internal ref cfg reg (AD5623R only)
+
+
+//#define SPI_SS_DEBUG SPI_SS_TX_DB
+#define SPI_SS_DEBUG 0
+
+inline static void
+_write_rx(uint32_t v)
+{
+  spi_transact(SPI_TXONLY, SPI_SS_RX_DAC | SPI_SS_DEBUG, v, 24, SPIF_PUSH_RISE);
+}
+
+inline static void
+_write_tx(uint32_t v)
+{
+  spi_transact(SPI_TXONLY, SPI_SS_TX_DAC | SPI_SS_DEBUG, v, 24, SPIF_PUSH_RISE);
+}
+
+void 
+lsdac_init(void)
+{
+  _write_tx(CMD_SW_RESET | 0x1);		// power-on reset
+  _write_rx(CMD_SW_RESET | 0x1);		// power-on reset
+}
+
+void
+lsdac_write_rx(int which_dac, int value)
+{
+  _write_rx(CMD_WR_UP_DAC_N | ((which_dac & 0x7) << 16) | ((value << 4) & 0xffff));
+}
+
+void
+lsdac_write_tx(int which_dac, int value)
+{
+  _write_tx(CMD_WR_UP_DAC_N | ((which_dac & 0x7) << 16) | ((value << 4) & 0xffff));
+}