From f57f616cfd6406cd67681813d464695c8c160f9e Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Wed, 14 Apr 2010 17:19:27 -0700
Subject: Added gain control to rfx. Switched string constants to caps (gains,
antennas, subdevs). Made dboard interface for aux dac and adc use volts.
---
host/lib/usrp/dboard/db_basic_and_lf.cpp | 6 ++--
host/lib/usrp/dboard/db_rfx.cpp | 47 ++++++++++++++++++++++++--------
host/lib/usrp/usrp2/dboard_iface.cpp | 13 +++++----
3 files changed, 46 insertions(+), 20 deletions(-)
(limited to 'host/lib/usrp')
diff --git a/host/lib/usrp/dboard/db_basic_and_lf.cpp b/host/lib/usrp/dboard/db_basic_and_lf.cpp
index 5a992339b..aad2398d8 100644
--- a/host/lib/usrp/dboard/db_basic_and_lf.cpp
+++ b/host/lib/usrp/dboard/db_basic_and_lf.cpp
@@ -77,9 +77,9 @@ static dboard_base::sptr make_lf_tx(dboard_base::ctor_args_t const& args){
UHD_STATIC_BLOCK(reg_basic_and_lf_dboards){
dboard_manager::register_dboard(0x0000, &make_basic_tx, "Basic TX");
- dboard_manager::register_dboard(0x0001, &make_basic_rx, "Basic RX", list_of("ab")("a")("b"));
+ dboard_manager::register_dboard(0x0001, &make_basic_rx, "Basic RX", list_of("AB")("A")("B"));
dboard_manager::register_dboard(0x000e, &make_lf_tx, "LF TX");
- dboard_manager::register_dboard(0x000f, &make_lf_rx, "LF RX", list_of("ab")("a")("b"));
+ dboard_manager::register_dboard(0x000f, &make_lf_rx, "LF RX", list_of("AB")("A")("B"));
}
/***********************************************************************
@@ -139,7 +139,7 @@ void basic_rx::rx_get(const wax::obj &key_, wax::obj &val){
return;
case SUBDEV_PROP_QUADRATURE:
- val = (get_subdev_name() == "ab"); //only quadrature in ab mode
+ val = (get_subdev_name() == "AB"); //only quadrature in ab mode
return;
case SUBDEV_PROP_IQ_SWAPPED:
diff --git a/host/lib/usrp/dboard/db_rfx.cpp b/host/lib/usrp/dboard/db_rfx.cpp
index b86546248..3f318d3ed 100644
--- a/host/lib/usrp/dboard/db_rfx.cpp
+++ b/host/lib/usrp/dboard/db_rfx.cpp
@@ -33,6 +33,7 @@
#include <uhd/types/ranges.hpp>
#include <uhd/utils/assert.hpp>
#include <uhd/utils/static.hpp>
+#include <uhd/utils/algorithm.hpp>
#include <uhd/usrp/dboard_base.hpp>
#include <uhd/usrp/dboard_manager.hpp>
#include <boost/assign/list_of.hpp>
@@ -45,6 +46,8 @@ using namespace boost::assign;
/***********************************************************************
* The RFX series of dboards
**********************************************************************/
+static const float _max_rx_pga0_gain = 45;
+
class rfx_xcvr : public xcvr_dboard_base{
public:
rfx_xcvr(ctor_args_t const& args, const freq_range_t &freq_range);
@@ -140,7 +143,7 @@ rfx_xcvr::rfx_xcvr(
//set some default values
set_lo_freq((_freq_range.min + _freq_range.max)/2.0);
- set_rx_ant("rx2");
+ set_rx_ant("RX2");
set_rx_pga0_gain(0);
}
@@ -152,20 +155,40 @@ rfx_xcvr::~rfx_xcvr(void){
* Helper Methods
**********************************************************************/
void rfx_xcvr::set_lo_freq(double freq){
- /* NOP */
+ //TODO !!!
reload_adf4360_regs();
}
void rfx_xcvr::set_rx_ant(const std::string &ant){
+ //validate input
+ ASSERT_THROW(ant == "TX/RX" or ant == "RX2");
+
//set the rx atr regs that change with antenna setting
this->get_iface()->set_atr_reg(
dboard_iface::UNIT_RX, dboard_iface::ATR_REG_RX_ONLY,
- POWER_UP | MIX_EN | ((ant == "tx/rx")? ANT_TXRX : ANT_RX2)
+ POWER_UP | MIX_EN | ((ant == "TX/RX")? ANT_TXRX : ANT_RX2)
);
+
+ //shadow the setting
+ _rx_ant = ant;
}
void rfx_xcvr::set_rx_pga0_gain(float gain){
- /* NOP */
+ //clip the input
+ gain = std::clip(gain, 0, _max_rx_pga0_gain);
+
+ //voltage level constants
+ static const float max_volts = .2, min_volts = 1.2;
+ static const float slope = (max_volts-min_volts)/_max_rx_pga0_gain;
+
+ //calculate the voltage for the aux dac
+ float dac_volts = gain*slope + min_volts;
+
+ //write the new voltage to the aux dac
+ this->get_iface()->write_aux_dac(dboard_iface::UNIT_RX, 1, dac_volts);
+
+ //shadow the setting (does not account for precision loss)
+ _rx_pga0_gain = gain;
}
void rfx_xcvr::reload_adf4360_regs(void){
@@ -201,15 +224,17 @@ void rfx_xcvr::rx_get(const wax::obj &key_, wax::obj &val){
return;
case SUBDEV_PROP_GAIN:
+ ASSERT_THROW(name == "PGA0");
val = _rx_pga0_gain;
return;
case SUBDEV_PROP_GAIN_RANGE:
- val = gain_range_t(0, 45, float(0.022));
+ ASSERT_THROW(name == "PGA0");
+ val = gain_range_t(0, _max_rx_pga0_gain, float(0.022));
return;
case SUBDEV_PROP_GAIN_NAMES:
- val = prop_names_t(1, "pga0");
+ val = prop_names_t(1, "PGA0");
return;
case SUBDEV_PROP_FREQ:
@@ -225,7 +250,7 @@ void rfx_xcvr::rx_get(const wax::obj &key_, wax::obj &val){
return;
case SUBDEV_PROP_ANTENNA_NAMES:{
- prop_names_t ants = list_of("tx/rx")("rx2");
+ prop_names_t ants = list_of("TX/RX")("RX2");
val = ants;
}
return;
@@ -256,7 +281,7 @@ void rfx_xcvr::rx_set(const wax::obj &key_, const wax::obj &val){
switch(key.as<subdev_prop_t>()){
case SUBDEV_PROP_GAIN:
- ASSERT_THROW(name == "pga0");
+ ASSERT_THROW(name == "PGA0");
set_rx_pga0_gain(val.as<float>());
return;
@@ -309,11 +334,11 @@ void rfx_xcvr::tx_get(const wax::obj &key_, wax::obj &val){
return;
case SUBDEV_PROP_ANTENNA:
- val = std::string("tx/rx");
+ val = std::string("TX/RX");
return;
case SUBDEV_PROP_ANTENNA_NAMES:
- val = prop_names_t(1, "tx/rx");
+ val = prop_names_t(1, "TX/RX");
return;
case SUBDEV_PROP_QUADRATURE:
@@ -347,7 +372,7 @@ void rfx_xcvr::tx_set(const wax::obj &key_, const wax::obj &val){
case SUBDEV_PROP_ANTENNA:
//its always set to tx/rx, so we only allow this value
- ASSERT_THROW(val.as<std::string>() == "tx/rx");
+ ASSERT_THROW(val.as<std::string>() == "TX/RX");
return;
default:
diff --git a/host/lib/usrp/usrp2/dboard_iface.cpp b/host/lib/usrp/usrp2/dboard_iface.cpp
index f77dfc495..2859a7981 100644
--- a/host/lib/usrp/usrp2/dboard_iface.cpp
+++ b/host/lib/usrp/usrp2/dboard_iface.cpp
@@ -22,6 +22,7 @@
#include <uhd/utils/assert.hpp>
#include <boost/assign/list_of.hpp>
#include <boost/asio.hpp> //htonl and ntohl
+#include <boost/math/special_functions/round.hpp>
#include <algorithm>
using namespace uhd::usrp;
@@ -31,8 +32,8 @@ public:
usrp2_dboard_iface(usrp2_iface::sptr iface, clock_control::sptr clk_ctrl);
~usrp2_dboard_iface(void);
- void write_aux_dac(unit_t, int, int);
- int read_aux_adc(unit_t, int);
+ void write_aux_dac(unit_t, int, float);
+ float read_aux_adc(unit_t, int);
void set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
void set_gpio_ddr(unit_t, boost::uint16_t);
@@ -251,20 +252,20 @@ static boost::uint8_t unit_to_otw(dboard_iface::unit_t unit){
throw std::invalid_argument("unknown unit type");
}
-void usrp2_dboard_iface::write_aux_dac(unit_t unit, int which, int value){
+void usrp2_dboard_iface::write_aux_dac(unit_t unit, int which, float 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 = unit_to_otw(unit);
out_data.data.aux_args.which = which;
- out_data.data.aux_args.value = htonl(value);
+ out_data.data.aux_args.value = htonl(boost::math::iround(4095*value/3.3));
//send and recv
usrp2_ctrl_data_t in_data = _iface->ctrl_send_and_recv(out_data);
ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_DONE_WITH_THAT_AUX_DAC_DUDE);
}
-int usrp2_dboard_iface::read_aux_adc(unit_t unit, int which){
+float usrp2_dboard_iface::read_aux_adc(unit_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);
@@ -274,5 +275,5 @@ int usrp2_dboard_iface::read_aux_adc(unit_t unit, int which){
//send and recv
usrp2_ctrl_data_t in_data = _iface->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);
+ return float(3.3*ntohl(in_data.data.aux_args.value)/4095);
}
--
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