1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
//
// Copyright 2010 Ettus Research LLC
//
// 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 "usrp2_impl.hpp"
#include "clock_control.hpp"
#include "ad9510_regs.hpp"
#include "usrp2_regs.hpp" //spi slave constants
#include <boost/cstdint.hpp>
using namespace uhd::usrp;
/*!
* A usrp2 clock control specific to the ad9510 ic.
*/
class clock_control_ad9510 : public clock_control{
public:
clock_control_ad9510(usrp2_impl *impl){
_impl = impl;
_ad9510_regs.cp_current_setting = ad9510_regs_t::CP_CURRENT_SETTING_3_0MA;
this->write_reg(0x09);
// Setup the clock registers to 100MHz:
// This was already done by the firmware (or the host couldnt communicate).
// We could remove this part, and just leave it to the firmware.
// But why not leave it in for those who want to mess with clock settings?
// 100mhz = 10mhz/R * (P*B + A)
_ad9510_regs.pll_power_down = ad9510_regs_t::PLL_POWER_DOWN_NORMAL;
_ad9510_regs.prescaler_value = ad9510_regs_t::PRESCALER_VALUE_DIV2;
this->write_reg(0x0A);
_ad9510_regs.acounter = 0;
this->write_reg(0x04);
_ad9510_regs.bcounter_msb = 0;
_ad9510_regs.bcounter_lsb = 5;
this->write_reg(0x05);
this->write_reg(0x06);
_ad9510_regs.ref_counter_msb = 0;
_ad9510_regs.ref_counter_lsb = 1; // r divider = 1
this->write_reg(0x0B);
this->write_reg(0x0C);
/* regs will be updated in commands below */
this->enable_external_ref(false);
this->enable_rx_dboard_clock(false);
this->enable_tx_dboard_clock(false);
/* private clock enables, must be set here */
this->enable_dac_clock(true);
this->enable_adc_clock(true);
}
~clock_control_ad9510(void){
/* private clock enables, must be set here */
//this->enable_dac_clock(false);
//this->enable_adc_clock(false); //FIXME cant do yet
}
//uses output clock 7 (cmos)
void enable_rx_dboard_clock(bool enb){
_ad9510_regs.power_down_lvds_cmos_out7 = enb? 0 : 1;
_ad9510_regs.lvds_cmos_select_out7 = ad9510_regs_t::LVDS_CMOS_SELECT_OUT7_CMOS;
_ad9510_regs.output_level_lvds_out7 = ad9510_regs_t::OUTPUT_LEVEL_LVDS_OUT7_1_75MA;
this->write_reg(0x43);
this->update_regs();
}
//uses output clock 6 (cmos)
void enable_tx_dboard_clock(bool enb){
_ad9510_regs.power_down_lvds_cmos_out6 = enb? 0 : 1;
_ad9510_regs.lvds_cmos_select_out6 = ad9510_regs_t::LVDS_CMOS_SELECT_OUT6_CMOS;
_ad9510_regs.output_level_lvds_out6 = ad9510_regs_t::OUTPUT_LEVEL_LVDS_OUT6_1_75MA;
this->write_reg(0x42);
this->update_regs();
}
/*!
* If we are to use an external reference, enable the charge pump.
* \param enb true to enable the CP
*/
void enable_external_ref(bool enb){
_ad9510_regs.charge_pump_mode = (enb)?
ad9510_regs_t::CHARGE_PUMP_MODE_NORMAL :
ad9510_regs_t::CHARGE_PUMP_MODE_3STATE ;
_ad9510_regs.pll_mux_control = ad9510_regs_t::PLL_MUX_CONTROL_DLD_HIGH;
_ad9510_regs.pfd_polarity = ad9510_regs_t::PFD_POLARITY_POS;
this->write_reg(0x08);
this->update_regs();
}
private:
/*!
* Write a single register to the spi regs.
* \param addr the address to write
*/
void write_reg(boost::uint8_t addr){
boost::uint32_t data = _ad9510_regs.get_write_reg(addr);
_impl->transact_spi(SPI_SS_AD9510, spi_config_t::EDGE_RISE, data, 24, false /*no rb*/);
}
/*!
* Tells the ad9510 to latch the settings into the operational registers.
*/
void update_regs(void){
_ad9510_regs.update_registers = 1;
this->write_reg(0x5a);
}
//uses output clock 3 (pecl)
void enable_dac_clock(bool enb){
_ad9510_regs.power_down_lvpecl_out3 = (enb)?
ad9510_regs_t::POWER_DOWN_LVPECL_OUT3_NORMAL :
ad9510_regs_t::POWER_DOWN_LVPECL_OUT3_SAFE_PD;
_ad9510_regs.output_level_lvpecl_out3 = ad9510_regs_t::OUTPUT_LEVEL_LVPECL_OUT3_810MV;
this->write_reg(0x3F);
this->update_regs();
}
//uses output clock 4 (lvds)
void enable_adc_clock(bool enb){
_ad9510_regs.power_down_lvds_cmos_out4 = enb? 0 : 1;
_ad9510_regs.lvds_cmos_select_out4 = ad9510_regs_t::LVDS_CMOS_SELECT_OUT4_LVDS;
_ad9510_regs.output_level_lvds_out4 = ad9510_regs_t::OUTPUT_LEVEL_LVDS_OUT4_1_75MA;
this->write_reg(0x40);
this->update_regs();
}
usrp2_impl *_impl;
ad9510_regs_t _ad9510_regs;
};
/***********************************************************************
* Public make function for the ad9510 clock control
**********************************************************************/
clock_control::sptr clock_control::make_ad9510(usrp2_impl *impl){
return clock_control::sptr(new clock_control_ad9510(impl));
}
|
