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//
// Copyright 2013 Ettus Research LLC
//
// Original ADF4001 driver written by: bistromath
// Mar 1, 2013
//
// Re-used and re-licensed with permission.
//
// 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 "adf4001_ctrl.hpp"
#include <uhd/utils/msg.hpp>
#include <iostream>
#include <iomanip>
using namespace uhd;
using namespace uhd::usrp;
adf4001_regs_t::adf4001_regs_t(void) {
ref_counter = 0;
n = 0;
charge_pump_current_1 = 0;
charge_pump_current_2 = 0;
anti_backlash_width = ANTI_BACKLASH_WIDTH_2_9NS;
lock_detect_precision = LOCK_DETECT_PRECISION_3CYC;
charge_pump_gain = CHARGE_PUMP_GAIN_1;
counter_reset = COUNTER_RESET_NORMAL;
power_down = POWER_DOWN_NORMAL;
muxout = MUXOUT_TRISTATE_OUT;
phase_detector_polarity = PHASE_DETECTOR_POLARITY_NEGATIVE;
charge_pump_mode = CHARGE_PUMP_TRISTATE;
fastlock_mode = FASTLOCK_MODE_DISABLED;
timer_counter_control = TIMEOUT_3CYC;
}
uint32_t adf4001_regs_t::get_reg(uint8_t addr) {
uint32_t reg = 0;
switch (addr) {
case 0:
reg |= (uint32_t(ref_counter) & 0x003FFF) << 2;
reg |= (uint32_t(anti_backlash_width) & 0x000003) << 16;
reg |= (uint32_t(lock_detect_precision) & 0x000001) << 20;
break;
case 1:
reg |= (uint32_t(n) & 0x001FFF) << 8;
reg |= (uint32_t(charge_pump_gain) & 0x000001) << 21;
break;
case 2:
reg |= (uint32_t(counter_reset) & 0x000001) << 2;
reg |= (uint32_t(power_down) & 0x000001) << 3;
reg |= (uint32_t(muxout) & 0x000007) << 4;
reg |= (uint32_t(phase_detector_polarity) & 0x000001) << 7;
reg |= (uint32_t(charge_pump_mode) & 0x000001) << 8;
reg |= (uint32_t(fastlock_mode) & 0x000003) << 9;
reg |= (uint32_t(timer_counter_control) & 0x00000F) << 11;
reg |= (uint32_t(charge_pump_current_1) & 0x000007) << 15;
reg |= (uint32_t(charge_pump_current_2) & 0x000007) << 18;
reg |= (uint32_t(power_down) & 0x000002) << 21;
break;
case 3:
reg |= (uint32_t(counter_reset) & 0x000001) << 2;
reg |= (uint32_t(power_down) & 0x000001) << 3;
reg |= (uint32_t(muxout) & 0x000007) << 4;
reg |= (uint32_t(phase_detector_polarity) & 0x000001) << 7;
reg |= (uint32_t(charge_pump_mode) & 0x000001) << 8;
reg |= (uint32_t(fastlock_mode) & 0x000003) << 9;
reg |= (uint32_t(timer_counter_control) & 0x00000F) << 11;
reg |= (uint32_t(charge_pump_current_1) & 0x000007) << 15;
reg |= (uint32_t(charge_pump_current_2) & 0x000007) << 18;
reg |= (uint32_t(power_down) & 0x000002) << 20;
break;
default:
break;
}
reg |= (uint32_t(addr) & 0x03);
return reg;
}
adf4001_ctrl::adf4001_ctrl(uhd::spi_iface::sptr _spi, int slaveno):
spi_iface(_spi),
slaveno(slaveno)
{
spi_config.mosi_edge = spi_config_t::EDGE_RISE;
//set defaults
adf4001_regs.ref_counter = 1;
adf4001_regs.n = 4;
adf4001_regs.charge_pump_current_1 = 7;
adf4001_regs.charge_pump_current_2 = 7;
adf4001_regs.muxout = adf4001_regs_t::MUXOUT_DLD;
adf4001_regs.counter_reset = adf4001_regs_t::COUNTER_RESET_NORMAL;
adf4001_regs.phase_detector_polarity = adf4001_regs_t::PHASE_DETECTOR_POLARITY_POSITIVE;
adf4001_regs.charge_pump_mode = adf4001_regs_t::CHARGE_PUMP_TRISTATE;
//everything else should be defaults
program_regs();
}
void adf4001_ctrl::set_lock_to_ext_ref(bool external) {
if(external) {
adf4001_regs.charge_pump_mode = adf4001_regs_t::CHARGE_PUMP_NORMAL;
} else {
adf4001_regs.charge_pump_mode = adf4001_regs_t::CHARGE_PUMP_TRISTATE;
}
program_regs();
}
void adf4001_ctrl::program_regs(void) {
//no control over CE, only LE, therefore we use the initialization latch method
write_reg(3);
//conduct a function latch (2)
write_reg(2);
//write R counter latch (0)
write_reg(0);
//write N counter latch (1)
write_reg(1);
}
void adf4001_ctrl::write_reg(uint8_t addr) {
uint32_t reg = adf4001_regs.get_reg(addr); //load the reg data
spi_iface->transact_spi(slaveno,
spi_config,
reg,
24,
false);
}
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