3 files changed, 57 insertions, 2 deletions
diff --git a/host/lib/usrp/mboard/usrp2/dboard_interface.cpp b/host/lib/usrp/mboard/usrp2/dboard_interface.cpp
index fd51558f2..597654b3c 100644
--- a/host/lib/usrp/mboard/usrp2/dboard_interface.cpp
+++ b/host/lib/usrp/mboard/usrp2/dboard_interface.cpp
@@ -239,3 +239,46 @@ interface::byte_vector_t dboard_interface::read_i2c(int i2c_addr, size_t num_byt
     }
     return result;
 }
+
+/***********************************************************************
+ * Aux DAX/ADC
+ **********************************************************************/
+/*!
+ * Static function to convert a unit type enum
+ * to an over-the-wire value for the usrp2 control.
+ * \param unit the dboard interface unit type enum
+ * \return an over the wire representation
+ */
+static uint8_t spi_dev_to_otw(interface::unit_type_t unit){
+    switch(unit){
+    case uhd::usrp::dboard::interface::UNIT_TYPE_TX: return USRP2_DIR_TX;
+    case uhd::usrp::dboard::interface::UNIT_TYPE_RX: return USRP2_DIR_RX;
+    }
+    throw std::invalid_argument("unknown unit type type");
+}
+
+void dboard_interface::write_aux_dac(interface::unit_type_t unit, int which, int value){
+    //setup the out data
+    usrp2_ctrl_data_t out_data;
+    out_data.id = htonl(USRP2_CTRL_ID_WRITE_THIS_TO_THE_AUX_DAC_BRO);
+    out_data.data.aux_args.dir = spi_dev_to_otw(unit);
+    out_data.data.aux_args.which = which;
+    out_data.data.aux_args.dir = htonl(value);
+
+    //send and recv
+    usrp2_ctrl_data_t in_data = _impl->ctrl_send_and_recv(out_data);
+    ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_DONE_WITH_THAT_AUX_DAC_DUDE);
+}
+
+int dboard_interface::read_aux_adc(interface::unit_type_t unit, int which){
+    //setup the out data
+    usrp2_ctrl_data_t out_data;
+    out_data.id = htonl(USRP2_CTRL_ID_READ_FROM_THIS_AUX_ADC_BRO);
+    out_data.data.aux_args.dir = spi_dev_to_otw(unit);
+    out_data.data.aux_args.which = which;
+
+    //send and recv
+    usrp2_ctrl_data_t in_data = _impl->ctrl_send_and_recv(out_data);
+    ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_DONE_WITH_THAT_AUX_ADC_DUDE);
+    return ntohl(in_data.data.aux_args.value);
+}
diff --git a/host/lib/usrp/mboard/usrp2/dboard_interface.hpp b/host/lib/usrp/mboard/usrp2/dboard_interface.hpp
index fb197a87a..0f78dec17 100644
--- a/host/lib/usrp/mboard/usrp2/dboard_interface.hpp
+++ b/host/lib/usrp/mboard/usrp2/dboard_interface.hpp
@@ -27,9 +27,9 @@ public:
 
     ~dboard_interface(void);
 
-    void write_aux_dac(int, int){}
+    void write_aux_dac(unit_type_t, int, int);
 
-    int read_aux_adc(int){return 0;}
+    int read_aux_adc(unit_type_t, int);
 
     void set_atr_reg(gpio_bank_t, uint16_t, uint16_t, uint16_t);
 
diff --git a/host/lib/usrp/mboard/usrp2/fw_common.h b/host/lib/usrp/mboard/usrp2/fw_common.h
index 91cb88c53..ede19d45f 100644
--- a/host/lib/usrp/mboard/usrp2/fw_common.h
+++ b/host/lib/usrp/mboard/usrp2/fw_common.h
@@ -72,6 +72,12 @@ typedef enum{
     USRP2_CTRL_ID_WRITE_THESE_I2C_VALUES_BRO,
     USRP2_CTRL_ID_COOL_IM_DONE_I2C_WRITE_DUDE,
 
+    USRP2_CTRL_ID_WRITE_THIS_TO_THE_AUX_DAC_BRO,
+    USRP2_CTRL_ID_DONE_WITH_THAT_AUX_DAC_DUDE,
+
+    USRP2_CTRL_ID_READ_FROM_THIS_AUX_ADC_BRO,
+    USRP2_CTRL_ID_DONE_WITH_THAT_AUX_ADC_DUDE,
+
     USRP2_CTRL_ID_PEACE_OUT
 
 } usrp2_ctrl_id_t;
@@ -144,6 +150,12 @@ typedef struct{
             uint8_t bytes;
             uint8_t data[sizeof(uint32_t)];
         } i2c_args;
+        struct {
+            uint8_t dir;
+            uint8_t which;
+            uint8_t _pad[2];
+            uint32_t value;
+        } aux_args;
     } data;
 } usrp2_ctrl_data_t;