diff options
Diffstat (limited to 'usrp2/firmware/lib/db_dbsrx.c')
| -rw-r--r-- | usrp2/firmware/lib/db_dbsrx.c | 396 |
1 files changed, 0 insertions, 396 deletions
diff --git a/usrp2/firmware/lib/db_dbsrx.c b/usrp2/firmware/lib/db_dbsrx.c deleted file mode 100644 index ce1300bf2..000000000 --- a/usrp2/firmware/lib/db_dbsrx.c +++ /dev/null @@ -1,396 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2009 Free Software Foundation, Inc. - * - * 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 <i2c.h> -#include <db_base.h> -#include <lsdac.h> -#include <memory_map.h> -#include <clocks.h> -#include <stdio.h> -#include <hal_io.h> - -#define min(X,Y) ((X) < (Y) ? (X) : (Y)) -#define max(X,Y) ((X) > (Y) ? (X) : (Y)) -#define abs(X) ((X) < (0) ? ((-1)*(X)) : (X)) - -#define I2C_ADDR 0x67 -#define REFCLK_DIVISOR 25 // Gives a 4 MHz clock -#define REFCLK_FREQ U2_DOUBLE_TO_FXPT_FREQ(MASTER_CLK_RATE/REFCLK_DIVISOR) -#define REFCLK_FREQ_INT u2_fxpt_freq_round_to_int(REFCLK_FREQ) - -#define VMAXGAIN .75 -#define VMINGAIN 2.6 -#define RFGAINMAX 60 -#define BBGAINMAX 24 -#define DACFULLSCALE 3.3 - -bool db_dbsrx_init(struct db_base *db); -bool db_dbsrx_set_freq(struct db_base *db, u2_fxpt_freq_t freq, u2_fxpt_freq_t *dc); -bool db_dbsrx_set_gain(struct db_base *db, u2_fxpt_gain_t gain); - -struct db_dbsrx_common { - int d_n; - int d_div2; - int d_osc; - int d_cp; - int d_r_reg; - int d_fdac; - int d_m; - int d_dl; - int d_ade; - int d_adl; - int d_gc2; - int d_diag; -}; - -struct db_dbsrx_dummy { - struct db_base base; - struct db_dbsrx_common common; -}; - -struct db_dbsrx { - struct db_base base; - struct db_dbsrx_common common; -}; - -struct db_dbsrx db_dbsrx = { - .base.dbid = 0x000d, - .base.is_tx = false, - .base.output_enables = 0x0000, - .base.used_pins = 0x0000, - .base.freq_min = U2_DOUBLE_TO_FXPT_FREQ(500e6), - .base.freq_max = U2_DOUBLE_TO_FXPT_FREQ(2.6e9), - .base.gain_min = U2_DOUBLE_TO_FXPT_GAIN(0), - .base.gain_max = U2_DOUBLE_TO_FXPT_GAIN(RFGAINMAX+BBGAINMAX), - .base.gain_step_size = U2_DOUBLE_TO_FXPT_GAIN(1), - .base.is_quadrature = true, - .base.i_and_q_swapped = false, - .base.spectrum_inverted = false, - .base.default_lo_offset = U2_DOUBLE_TO_FXPT_FREQ(0), - .base.init = db_dbsrx_init, - .base.set_freq = db_dbsrx_set_freq, - .base.set_gain = db_dbsrx_set_gain, - .base.set_tx_enable = 0, - .base.atr_mask = 0x0000, - .base.atr_txval = 0, - .base.atr_rxval = 0, - //.base.atr_tx_delay = - //.base.atr_rx_delay = - .common.d_n = 950, - .common.d_div2 = 0, - .common.d_osc = 5, - .common.d_cp = 3, - .common.d_r_reg = 1, - .common.d_fdac = 127, - .common.d_m = 2, - .common.d_dl = 1, - .common.d_ade = 0, - .common.d_adl = 0, - .common.d_gc2 = 31, - .common.d_diag = 0, - .base.set_antenna = 0, -}; - -bool -db_dbsrx_init(struct db_base *dbb){ - struct db_dbsrx_dummy *db = (struct db_dbsrx_dummy *) dbb; - db->base.set_gain(dbb, (db->base.gain_max + db->base.gain_min)/2); - clocks_enable_rx_dboard(true, REFCLK_DIVISOR); // Gives 4 MHz clock - - return true; -} - -/************************************************** - * Registers - **************************************************/ -static int -_read_adc (void){ - unsigned char readback[2]; - i2c_read(I2C_ADDR, readback, 2*sizeof(unsigned char)); - int adc_val = (readback[0] >> 2)&7; - //printf("READBACK[0] %d, [1] %d\n",readback[0],readback[1]); - //printf("ADC: %d\n",adc_val); - return adc_val; -} - -static void -_write_reg (int regno, int v){ - //regno is in [0,5], v is value to write to register""" - unsigned char args[2]; - args[0] = (unsigned char)regno; - args[1] = (unsigned char)v; - i2c_write(I2C_ADDR, args, 2*sizeof(unsigned char)); - //printf("Reg %d, Val %x\n",regno,v); -} - -static void _send_reg_0(struct db_dbsrx_dummy *db){ - _write_reg(0,(db->common.d_div2<<7) + (db->common.d_n>>8)); -} - -static void _send_reg_1(struct db_dbsrx_dummy *db){ - _write_reg(1,db->common.d_n & 255); -} - -static void _send_reg_2(struct db_dbsrx_dummy *db){ - _write_reg(2,db->common.d_osc + (db->common.d_cp<<3) + (db->common.d_r_reg<<5)); -} - -static void _send_reg_3(struct db_dbsrx_dummy *db){ - _write_reg(3,db->common.d_fdac); -} - -static void _send_reg_4(struct db_dbsrx_dummy *db){ - _write_reg(4,db->common.d_m + (db->common.d_dl<<5) + (db->common.d_ade<<6) + (db->common.d_adl<<7)); -} - -static void _send_reg_5(struct db_dbsrx_dummy *db){ - _write_reg(5,db->common.d_gc2 + (db->common.d_diag<<5)); -} - -/************************************************** - * Helpers for setting the freq - **************************************************/ -static void -_set_div2(struct db_dbsrx_dummy *db, int div2){ - db->common.d_div2 = div2; - _send_reg_0(db); -} - -// FIXME How do we handle ADE and ADL properly? -static void -_set_ade(struct db_dbsrx_dummy *db, int ade){ - db->common.d_ade = ade; - _send_reg_4(db); -} - -static void -_set_r(struct db_dbsrx_dummy *db, int r){ - db->common.d_r_reg = r; - _send_reg_2(db); -} - -static void -_set_n(struct db_dbsrx_dummy *db, int n){ - db->common.d_n = n; - _send_reg_0(db); - _send_reg_1(db); -} - -static void -_set_osc(struct db_dbsrx_dummy *db, int osc){ - db->common.d_osc = osc; - _send_reg_2(db); -} - -static void -_set_cp(struct db_dbsrx_dummy *db, int cp){ - db->common.d_cp = cp; - _send_reg_2(db); -} - -/************************************************** - * Set the freq - **************************************************/ - - -bool -db_dbsrx_set_freq(struct db_base *dbb, u2_fxpt_freq_t freq, u2_fxpt_freq_t *dc){ - struct db_dbsrx_dummy *db = (struct db_dbsrx_dummy *) dbb; - - if(!(freq>=db->base.freq_min && freq<=db->base.freq_max)) { - return false; - } - - u2_fxpt_freq_t vcofreq; - if(freq < U2_DOUBLE_TO_FXPT_FREQ(1150e6)) { - _set_div2(db, 0); - vcofreq = 4 * freq; - } - else { - _set_div2(db, 1); - vcofreq = 2 * freq; - } - - _set_ade(db, 1); - int rmin = max(2, u2_fxpt_freq_round_to_int(REFCLK_FREQ/2e6)); //TODO? remove max() - //int rmax = min(128, u2_fxpt_freq_round_to_int(REFCLK_FREQ/500e3)); //TODO? remove min() - int n = 0; - u2_fxpt_freq_t best_delta = U2_DOUBLE_TO_FXPT_FREQ(10e6); - u2_fxpt_freq_t delta; - - int r_reg = 0; - while ((r_reg<7) && ((2<<r_reg) < rmin)) { - r_reg++; - } - //printf ("r_reg = %d, r = %d\n",r_reg,2<<r_reg); - int best_r = r_reg; - int best_n = 0; - - while(r_reg <= 7) { - n = u2_fxpt_freq_round_to_int(freq/REFCLK_FREQ_INT*(2<<r_reg)); - //printf("LOOP: r_reg %d, best_r %d, best_n %d, best_delta %d\n", - //r_reg,best_r,best_n,u2_fxpt_freq_round_to_int(best_delta)); - - //printf("N: %d\n",n); - if(n<256) { - r_reg++; - continue; - } - delta = abs(n*REFCLK_FREQ/(2<<r_reg) - freq); - if(delta < best_delta) { - best_r = r_reg; - best_n = n; - best_delta = delta; - } - if(best_delta < U2_DOUBLE_TO_FXPT_FREQ(75e3)) { - break; - } - r_reg++; - } - - //printf("BEST R: %d Best Delta %d Best N %d\n", - // best_r,u2_fxpt_freq_round_to_int(best_delta),best_n); - _set_r(db, best_r); - _set_n(db, best_n); - - int vco; - if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(2433e6)) - vco = 0; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(2711e6)) - vco=1; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(3025e6)) - vco=2; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(3341e6)) - vco=3; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(3727e6)) - vco=4; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(4143e6)) - vco=5; - else if(vcofreq < U2_DOUBLE_TO_FXPT_FREQ(4493e6)) - vco=6; - else - vco=7; - //printf("Initial VCO choice %d\n",vco); - _set_osc(db, vco); - - - int adc_val = 0; - while(adc_val == 0 || adc_val == 7) { - adc_val = _read_adc(); - //printf("adc %d\n",adc_val); - - if(adc_val == 0) { - if(vco <= 0) { - return false; - } - else { - vco = vco - 1; - } - } - else if(adc_val == 7) { - if(vco >= 7) { - return false; - } - else { - vco = vco + 1; - } - } - _set_osc(db, vco); - } - - if(adc_val == 1 || adc_val == 2) { - _set_cp(db, 1); - } - else if(adc_val == 3 || adc_val == 4) { - _set_cp(db, 2); - } - else { - _set_cp(db, 3); - } - //printf("Final VCO choice %d\n",vco); - - *dc = db->common.d_n * REFCLK_FREQ / (2<<db->common.d_r_reg); - return true; - -} - -/************************************************** - * Helpers for setting the gain - **************************************************/ - -static void -_set_gc2(struct db_dbsrx_dummy *db, int gc2){ - db->common.d_gc2 = gc2; - _send_reg_5(db); -} - -/************************************************** - * Set the gain - **************************************************/ -bool -db_dbsrx_set_gain(struct db_base *dbb, u2_fxpt_gain_t gain){ - struct db_dbsrx_dummy *db = (struct db_dbsrx_dummy *) dbb; - - u2_fxpt_gain_t rfgain, bbgain; - - if(!(gain >= db->base.gain_min && gain <= db->base.gain_max)) { - return false; - } - - if(gain < U2_DOUBLE_TO_FXPT_GAIN(RFGAINMAX)) { - rfgain = gain; - bbgain = 0; - } - else { - rfgain = U2_DOUBLE_TO_FXPT_GAIN(RFGAINMAX); - bbgain = gain - U2_DOUBLE_TO_FXPT_GAIN(RFGAINMAX); - } - - int rf_gain_slope_q8 = 256 * 4096 * (VMAXGAIN-VMINGAIN) / RFGAINMAX / DACFULLSCALE; - int rf_gain_offset_q8 = 128 * 256 * 4096 * VMINGAIN / DACFULLSCALE; - - int rfdac = (rfgain*rf_gain_slope_q8 + rf_gain_offset_q8)>>15; - - //printf("Set RF Gain %d, %d\n",rfgain,rfdac); - lsdac_write_rx(1,rfdac); - - // Set GC2 - int bb_gain_slope_q8 = 256*(0-31)/(BBGAINMAX-0); - - int gc2 = u2_fxpt_gain_round_to_int((bb_gain_slope_q8 * bbgain)>>8) + 31; - //printf("Set BB Gain: %d, gc2 %d\n",bbgain,gc2); - - _set_gc2(db, gc2); - - return true; -} - -/************************************************** - * Helpers for setting the bw - **************************************************/ -static void -_set_m(struct db_dbsrx_dummy *db, int m){ - db->common.d_m = m; - _send_reg_4(db); -} - -static void -_set_fdac(struct db_dbsrx_dummy *db, int fdac){ - db->common.d_fdac = fdac; - _send_reg_3(db); -} |