2 // Copyright 2009 Free Software Foundation, Inc.
4 // This file is part of GNU Radio
6 // GNU Radio is free software; you can redistribute it and/or modify
7 // it under the terms of the GNU General Public License as published by
8 // the Free Software Foundation; either asversion 3, or (at your option)
11 // GNU Radio is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with GNU Radio; see the file COPYING. If not, write to
18 // the Free Software Foundation, Inc., 51 Franklin Street,
19 // Boston, MA 02110-1301, USA.
25 #include "db_wbxng_adf4350.h"
26 #include <db_base_impl.h>
29 #define INPUT_REF_FREQ FREQ_C(64e6)
30 #define DIV_ROUND(num, denom) (((num) + ((denom)/2))/(denom))
31 #define FREQ_C(freq) uint64_t(freq)
32 #define INPUT_REF_FREQ_2X (2*INPUT_REF_FREQ) /* input ref freq with doubler turned on */
33 #define MIN_INT_DIV uint16_t(23) /* minimum int divider, prescaler 4/5 only */
34 #define MAX_RF_DIV uint8_t(16) /* max rf divider, divides rf output */
35 #define MIN_VCO_FREQ FREQ_C(2.2e9) /* minimum vco freq */
36 #define MAX_VCO_FREQ FREQ_C(4.4e9) /* minimum vco freq */
37 #define MAX_FREQ DIV_ROUND(MAX_VCO_FREQ, 1) /* upper bound freq (rf div = 1) */
38 #define MIN_FREQ DIV_ROUND(MIN_VCO_FREQ, MAX_RF_DIV) /* calculated lower bound freq */
40 #define CE_PIN (1 << 3)
41 #define PDB_RF_PIN (1 << 2)
42 #define MUX_PIN (1 << 1)
43 #define LD_PIN (1 << 0)
45 adf4350::adf4350(usrp_basic_sptr _usrp, int _which, int _spi_enable)
47 /* Initialize the pin directions. */
51 d_spi_enable = _spi_enable;
52 d_spi_format = SPI_FMT_MSB | SPI_FMT_HDR_0;
54 d_regs = new adf4350_regs(this);
57 d_usrp->_write_oe(d_which, (CE_PIN | PDB_RF_PIN), (CE_PIN | PDB_RF_PIN));
58 d_usrp->write_io(d_which, (0), (CE_PIN | PDB_RF_PIN));
60 /* Initialize the pin levels. */
62 /* Initialize the registers. */
63 d_regs->_load_register(5);
64 d_regs->_load_register(4);
65 d_regs->_load_register(3);
66 d_regs->_load_register(2);
67 d_regs->_load_register(1);
68 d_regs->_load_register(0);
77 adf4350::_get_max_freq(void)
83 adf4350::_get_min_freq(void)
89 adf4350::_get_locked(void)
91 return d_usrp->read_io(d_which) & LD_PIN;
95 adf4350::_enable(bool enable)
97 if (enable){ /* chip enable */
98 d_usrp->write_io(d_which, (CE_PIN | PDB_RF_PIN), (CE_PIN | PDB_RF_PIN));
100 d_usrp->write_io(d_which, 0, (CE_PIN | PDB_RF_PIN));
105 adf4350::_write(uint8_t addr, uint32_t data)
109 // create str from data here
111 s[0] = (char)((data >> 24) & 0xff);
112 s[1] = (char)((data >> 16) & 0xff);
113 s[2] = (char)((data >> 8) & 0xff);
114 s[3] = (char)(data & 0xff);
115 std::string str(s, 4);
122 d_usrp->_write_spi(0, d_spi_enable, d_spi_format, str);
125 //fprintf(stderr, "Wrote to WBXNG SPI address %d with data %8x\n", addr, data);
127 //d_usrp->write_io(d_which, 1, LE_PIN);
128 //d_usrp->write_io(d_which, 0, LE_PIN);
132 adf4350::_set_freq(freq_t freq)
134 /* Set the frequency by setting int, frac, mod, r, div */
135 if (freq > MAX_FREQ || freq < MIN_FREQ) return false;
136 int min_int_div = 23;
137 d_regs->d_prescaler = 0;
138 if (freq > FREQ_C(3e9)) {
140 d_regs->d_prescaler = 1;
142 /* Ramp up the RF divider until the VCO is within range. */
143 d_regs->d_divider_select = 0;
144 while (freq < MIN_VCO_FREQ){
145 freq <<= 1; //double the freq
146 d_regs->d_divider_select++; //double the divider
148 /* Ramp up the R divider until the N divider is at least the minimum. */
149 //d_regs->d_10_bit_r_counter = INPUT_REF_FREQ*MIN_INT_DIV/freq;
150 d_regs->d_10_bit_r_counter = 2;
153 d_regs->d_10_bit_r_counter++;
155 n_mod *= d_regs->d_10_bit_r_counter;
156 n_mod *= d_regs->d_mod;
157 n_mod /= INPUT_REF_FREQ;
158 /* calculate int and frac */
159 d_regs->d_int = n_mod/d_regs->d_mod;
160 d_regs->d_frac = (n_mod - (freq_t)d_regs->d_int*d_regs->d_mod) & uint16_t(0xfff);
163 "VCO %lu KHz, Int %u, Frac %u, Mod %u, R %u, Div %u\n",
164 freq, d_regs->d_int, d_regs->d_frac,
165 d_regs->d_mod, d_regs->d_10_bit_r_counter, (1 << d_regs->d_divider_select)
168 }while(d_regs->d_int < min_int_div);
169 /* calculate the band select so PFD is under 125 KHz */
170 d_regs->d_8_bit_band_select_clock_divider_value = \
171 INPUT_REF_FREQ/(FREQ_C(30e3)*d_regs->d_10_bit_r_counter) + 1;
173 fprintf(stderr, "Band Selection: Div %u, Freq %lu\n",
174 d_regs->d_8_bit_band_select_clock_divider_value,
175 INPUT_REF_FREQ/(d_regs->d_8_bit_band_select_clock_divider_value * d_regs->d_10_bit_r_counter) + 1
178 d_regs->_load_register(5);
179 d_regs->_load_register(3);
180 d_regs->_load_register(1);
181 /* load involved registers */
182 d_regs->_load_register(2);
183 d_regs->_load_register(4);
184 d_regs->_load_register(0); /* register 0 must be last */
189 adf4350::_get_freq(void)
191 /* Calculate the freq from int, frac, mod, ref, r, div:
192 * freq = (int + frac/mod) * (ref/r)
193 * Keep precision by doing multiplies first:
194 * freq = (((((((int)*mod) + frac)*ref)/mod)/r)/div)
197 temp = d_regs->d_int;
198 temp *= d_regs->d_mod;
199 temp += d_regs->d_frac;
200 temp *= INPUT_REF_FREQ;
201 temp /= d_regs->d_mod;
202 temp /= d_regs->d_10_bit_r_counter;
203 temp /= (1 << d_regs->d_divider_select);