/* hal_gpio_write( GPIO_RX_BANK, ENABLE_5|ENABLE_33, ENABLE_5|ENABLE_33 ); */
/* above isn't needed, since we don't have any GPIO from the FPGA */
- /* The next set of initialization commands sent to the bitshark board
- require a brief delay after each command. This only seems to be
- necessary when sending a sequence of commands one after the other.
- This issue appears to be specific to the USRP2, since it isn't
- necessary on the USRP1. The 5 mS delay is a bit of
- an emperical compromise: too short (say, 1 mS), and every once
- in a great while a command will still be magically dropped on its
- way out...too long (say, 500 mS) and higher-level apps such as
- usrp2_fft.py seem to choke because the init sequence is taking
- too long. So 5 mS was tested repeatedly without, and deemed
- reasonable. Not sure if this is an issue with the I2C master
- code in the microblaze or some place else, and I hate magic
- delays too, but this seems to be stable. */
-
/* setup the clock scheme to accept the USRP2's 100 MHz ref clk */
set_clock_scheme(0,100000000);
- mdelay(5);
+
/* initial setting of gain */
dbb->set_gain(dbb,U2_DOUBLE_TO_FXPT_GAIN(20.0));
- mdelay(5);
+
/* Set the freq now to get the one time 10ms delay out of the way. */
u2_fxpt_freq_t dc;
dbb->set_freq(dbb, dbb->freq_min, &dc);
- mdelay(5);
+
/* set up the RF bandwidth of the signal of interest...Note: there
doesn't appear to be a standard way of setting this bandwidth
in USRP2-land (compared to USRP1-land, where we have the
for now, simply set the bandwidth once for the intended
application. */
db->extra.set_bw(dbb, 25000); /* 25 MHz channel bw */
- mdelay(5);
return true;
}
struct db_bitshark_rx_dummy *db = (struct db_bitshark_rx_dummy *) dbb;
unsigned char args[NUM_BYTES_IN_I2C_CMD];
unsigned char val[4];
- uint32_t freq_in_khz = (uint32_t)(u2_fxpt_freq_to_double(freq)/1000.0);
+ uint32_t freq_in_khz = (uint32_t)(u2_fxpt_freq_round_to_uint(freq)/1000);
if(!(freq>=db->base.freq_min && freq<=db->base.freq_max))
{
args[8] = val[0];
i2c_write(I2C_ADDR, args, NUM_BYTES_IN_I2C_CMD);
- *dc = freq;
+ /* Add a brief delay after each command. This only seems to be
+ necessary when sending a sequence of commands one after the other.
+ This issue appears to be specific to the USRP2, since it isn't
+ necessary on the USRP1. The 5 mS delay is a bit of
+ an emperical compromise: too short (say, 1 mS), and every once
+ in a great while a command will still be magically dropped on its
+ way out...too long (say, 500 mS) and higher-level apps such as
+ usrp2_fft.py seem to choke because the init sequence is taking
+ too long. So 5 mS was tested repeatedly without error, and deemed
+ reasonable. Not sure if this is an issue with the I2C master
+ code in the microblaze or some place else, and I hate magic
+ delays too, but this seems to be stable. */
+ mdelay(5);
+
+ *dc = freq;
return true;
}
args[5] = final_gain;
i2c_write(I2C_ADDR, args, NUM_BYTES_IN_I2C_CMD);
+ /* Add a brief delay after each command. This only seems to be
+ necessary when sending a sequence of commands one after the other.
+ This issue appears to be specific to the USRP2, since it isn't
+ necessary on the USRP1. The 5 mS delay is a bit of
+ an emperical compromise: too short (say, 1 mS), and every once
+ in a great while a command will still be magically dropped on its
+ way out...too long (say, 500 mS) and higher-level apps such as
+ usrp2_fft.py seem to choke because the init sequence is taking
+ too long. So 5 mS was tested repeatedly without error, and deemed
+ reasonable. Not sure if this is an issue with the I2C master
+ code in the microblaze or some place else, and I hate magic
+ delays too, but this seems to be stable. */
+ mdelay(5);
return true;
}
args[6] = val[0];
i2c_write(I2C_ADDR, args, NUM_BYTES_IN_I2C_CMD);
+ /* Add a brief delay after each command. This only seems to be
+ necessary when sending a sequence of commands one after the other.
+ This issue appears to be specific to the USRP2, since it isn't
+ necessary on the USRP1. The 5 mS delay is a bit of
+ an emperical compromise: too short (say, 1 mS), and every once
+ in a great while a command will still be magically dropped on its
+ way out...too long (say, 500 mS) and higher-level apps such as
+ usrp2_fft.py seem to choke because the init sequence is taking
+ too long. So 5 mS was tested repeatedly without error, and deemed
+ reasonable. Not sure if this is an issue with the I2C master
+ code in the microblaze or some place else, and I hate magic
+ delays too, but this seems to be stable. */
+ mdelay(5);
return true;
}
args[8] = val[0];
i2c_write(I2C_ADDR, args, NUM_BYTES_IN_I2C_CMD);
+ /* Add a brief delay after each command. This only seems to be
+ necessary when sending a sequence of commands one after the other.
+ This issue appears to be specific to the USRP2, since it isn't
+ necessary on the USRP1. The 5 mS delay is a bit of
+ an emperical compromise: too short (say, 1 mS), and every once
+ in a great while a command will still be magically dropped on its
+ way out...too long (say, 500 mS) and higher-level apps such as
+ usrp2_fft.py seem to choke because the init sequence is taking
+ too long. So 5 mS was tested repeatedly without error, and deemed
+ reasonable. Not sure if this is an issue with the I2C master
+ code in the microblaze or some place else, and I hate magic
+ delays too, but this seems to be stable. */
+ mdelay(5);
return true;
}
+++ /dev/null
-/* -*- c++ -*- */
-/*
- * Copyright 2008,2009 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 <memory_map.h>
-#include <i2c.h>
-#include <usrp2_i2c_addr.h>
-#include <string.h>
-#include <stdio.h>
-#include <db.h>
-#include <db_base.h>
-#include <hal_io.h>
-#include <nonstdio.h>
-
-struct db_base *rx_dboard; // the rx daughterboard that's installed
-struct db_base *tx_dboard; // the tx daughterboard that's installed
-
-extern struct db_base db_basic_tx;
-extern struct db_base db_basic_rx;
-extern struct db_base db_lf_tx;
-extern struct db_base db_lf_rx;
-extern struct db_base db_bitshark_rx;
-
-struct db_base *all_dboards[] = {
- &db_basic_tx,
- &db_basic_rx,
- &db_lf_tx,
- &db_lf_rx,
- &db_bitshark_rx,
- 0
-};
-
-
-typedef enum { UDBE_OK, UDBE_NO_EEPROM, UDBE_INVALID_EEPROM } usrp_dbeeprom_status_t;
-
-static usrp_dbeeprom_status_t
-read_raw_dboard_eeprom (unsigned char *buf, int i2c_addr)
-{
- if (!eeprom_read (i2c_addr, 0, buf, DB_EEPROM_CLEN))
- return UDBE_NO_EEPROM;
-
- if (buf[DB_EEPROM_MAGIC] != DB_EEPROM_MAGIC_VALUE)
- return UDBE_INVALID_EEPROM;
-
- int sum = 0;
- unsigned int i;
- for (i = 0; i < DB_EEPROM_CLEN; i++)
- sum += buf[i];
-
- if ((sum & 0xff) != 0)
- return UDBE_INVALID_EEPROM;
-
- return UDBE_OK;
-}
-
-
-/*
- * Return DBID, -1 <none> or -2 <invalid eeprom contents>
- */
-int
-read_dboard_eeprom(int i2c_addr)
-{
- unsigned char buf[DB_EEPROM_CLEN];
-
- usrp_dbeeprom_status_t s = read_raw_dboard_eeprom (buf, i2c_addr);
-
- //printf("\nread_raw_dboard_eeprom: %d\n", s);
-
- switch (s){
- case UDBE_OK:
- return (buf[DB_EEPROM_ID_MSB] << 8) | buf[DB_EEPROM_ID_LSB];
-
- case UDBE_NO_EEPROM:
- default:
- return -1;
-
- case UDBE_INVALID_EEPROM:
- return -2;
- }
-}
-
-
-static struct db_base *
-lookup_dbid(int dbid)
-{
- if (dbid < 0)
- return 0;
-
- int i;
- for (i = 0; all_dboards[i]; i++)
- if (all_dboards[i]->dbid == dbid)
- return all_dboards[i];
-
- return 0;
-}
-
-static struct db_base *
-lookup_dboard(int i2c_addr, struct db_base *default_db, char *msg)
-{
- struct db_base *db;
- int dbid = read_dboard_eeprom(i2c_addr);
-
- // FIXME removing this printf has the system hang if there are two d'boards
- // installed. (I think the problem is in i2c_read/write or the way
- // I kludge the zero-byte write to set the read address in eeprom_read.)
- printf("%s dbid: 0x%x\n", msg, dbid);
-
- if (dbid < 0){ // there was some kind of problem. Treat as Basic Tx
- return default_db;
- }
- else if ((db = lookup_dbid(dbid)) == 0){
- printf("No daugherboard code for dbid = 0x%x\n", dbid);
- return default_db;
- }
- return db;
-}
-
-void
-set_atr_regs(int bank, struct db_base *db)
-{
- uint32_t val[4];
- int shift;
- int mask;
- int i;
-
- val[ATR_IDLE] = db->atr_rxval;
- val[ATR_RX] = db->atr_rxval;
- val[ATR_TX] = db->atr_txval;
- val[ATR_FULL] = db->atr_txval;
-
- if (bank == GPIO_TX_BANK){
- mask = 0xffff0000;
- shift = 16;
- }
- else {
- mask = 0x0000ffff;
- shift = 0;
- }
-
- for (i = 0; i < 4; i++){
- int t = (atr_regs->v[i] & ~mask) | ((val[i] << shift) & mask);
- //printf("atr_regs[%d] = 0x%x\n", i, t);
- atr_regs->v[i] = t;
- }
-}
-
-static void
-set_gpio_mode(int bank, struct db_base *db)
-{
- int i;
-
- hal_gpio_set_ddr(bank, db->output_enables, 0xffff);
- set_atr_regs(bank, db);
-
- for (i = 0; i < 16; i++){
- if (db->used_pins & (1 << i)){
- // set to either GPIO_SEL_SW or GPIO_SEL_ATR
- hal_gpio_set_sel(bank, i, (db->atr_mask & (1 << i)) ? 'a' : 's');
- }
- }
-}
-
-static int __attribute__((unused))
-determine_tx_mux_value(struct db_base *db)
-{
- if (db->i_and_q_swapped)
- return 0x01;
- else
- return 0x10;
-}
-
-static int
-determine_rx_mux_value(struct db_base *db)
-{
-#define ADC0 0x0
-#define ADC1 0x1
-#define ZERO 0x2
-
- static int truth_table[8] = {
- /* swap_iq, uses */
- /* 0, 0x0 */ (ZERO << 2) | ZERO, // N/A
- /* 0, 0x1 */ (ZERO << 2) | ADC0,
- /* 0, 0x2 */ (ZERO << 2) | ADC1,
- /* 0, 0x3 */ (ADC1 << 2) | ADC0,
- /* 1, 0x0 */ (ZERO << 2) | ZERO, // N/A
- /* 1, 0x1 */ (ZERO << 2) | ADC0,
- /* 1, 0x2 */ (ZERO << 2) | ADC1,
- /* 1, 0x3 */ (ADC0 << 2) | ADC1,
- };
-
- int subdev0_uses;
- int subdev1_uses;
- int uses;
-
- if (db->is_quadrature)
- subdev0_uses = 0x3; // uses A/D 0 and 1
- else
- subdev0_uses = 0x1; // uses A/D 0 only
-
- // FIXME second subdev on Basic Rx, LF RX
- // if subdev2 exists
- // subdev1_uses = 0x2;
- subdev1_uses = 0;
-
- uses = subdev0_uses;
-
- int swap_iq = db->i_and_q_swapped & 0x1;
- int index = (swap_iq << 2) | uses;
-
- return truth_table[index];
-}
-
-
-void
-db_init(void)
-{
- int m;
-
- tx_dboard = lookup_dboard(I2C_ADDR_TX_A, &db_basic_tx, "Tx");
- //printf("db_init: tx dbid = 0x%x\n", tx_dboard->dbid);
- set_gpio_mode(GPIO_TX_BANK, tx_dboard);
- tx_dboard->init(tx_dboard);
- m = determine_tx_mux_value(tx_dboard);
- dsp_tx_regs->tx_mux = m;
- //printf("tx_mux = 0x%x\n", m);
- tx_dboard->current_lo_offset = tx_dboard->default_lo_offset;
-
- rx_dboard = lookup_dboard(I2C_ADDR_RX_A, &db_basic_rx, "Rx");
- //printf("db_init: rx dbid = 0x%x\n", rx_dboard->dbid);
- set_gpio_mode(GPIO_RX_BANK, rx_dboard);
- rx_dboard->init(rx_dboard);
- m = determine_rx_mux_value(rx_dboard);
- dsp_rx_regs->rx_mux = m;
- //printf("rx_mux = 0x%x\n", m);
- rx_dboard->current_lo_offset = rx_dboard->default_lo_offset;
-}
-
-/*!
- * Calculate the frequency to use for setting the digital down converter.
- *
- * \param[in] target_freq desired RF frequency (Hz)
- * \param[in] baseband_freq the RF frequency that corresponds to DC in the IF.
- *
- * \param[out] dxc_freq is the value for the ddc
- * \param[out] inverted is true if we're operating in an inverted Nyquist zone.
-*/
-void
-calc_dxc_freq(u2_fxpt_freq_t target_freq, u2_fxpt_freq_t baseband_freq,
- u2_fxpt_freq_t *dxc_freq, bool *inverted)
-{
- u2_fxpt_freq_t fs = U2_DOUBLE_TO_FXPT_FREQ(100e6); // converter sample rate
- u2_fxpt_freq_t delta = target_freq - baseband_freq;
-
-#if 0
- printf("calc_dxc_freq\n");
- printf(" fs = "); print_fxpt_freq(fs); newline();
- printf(" target = "); print_fxpt_freq(target_freq); newline();
- printf(" baseband = "); print_fxpt_freq(baseband_freq); newline();
- printf(" delta = "); print_fxpt_freq(delta); newline();
-#endif
-
- if (delta >= 0){
- while (delta > fs)
- delta -= fs;
- if (delta <= fs/2){ // non-inverted region
- *dxc_freq = -delta;
- *inverted = false;
- }
- else { // inverted region
- *dxc_freq = delta - fs;
- *inverted = true;
- }
- }
- else {
- while (delta < -fs)
- delta += fs;
- if (delta >= -fs/2){ // non-inverted region
- *dxc_freq = -delta;
- *inverted = false;
- }
- else { // inverted region
- *dxc_freq = delta + fs;
- *inverted = true;
- }
- }
-}
-
-bool
-db_set_lo_offset(struct db_base *db, u2_fxpt_freq_t offset)
-{
- db->current_lo_offset = offset;
- return true;
-}
-
-bool
-db_tune(struct db_base *db, u2_fxpt_freq_t target_freq, struct tune_result *result)
-{
- memset(result, 0, sizeof(*result));
- bool inverted = false;
- u2_fxpt_freq_t dxc_freq;
- u2_fxpt_freq_t actual_dxc_freq;
-
- // Ask the d'board to tune as closely as it can to target_freq+lo_offset
- bool ok = db->set_freq(db, target_freq+db->current_lo_offset, &result->baseband_freq);
-
- // Calculate the DDC setting that will downconvert the baseband from the
- // daughterboard to our target frequency.
- calc_dxc_freq(target_freq, result->baseband_freq, &dxc_freq, &inverted);
-
- // If the spectrum is inverted, and the daughterboard doesn't do
- // quadrature downconversion, we can fix the inversion by flipping the
- // sign of the dxc_freq... (This only happens using the basic_rx board)
-
- if (db->spectrum_inverted)
- inverted = !inverted;
-
- if (inverted && !db->is_quadrature){
- dxc_freq = -dxc_freq;
- inverted = !inverted;
- }
-
- if (db->is_tx){
- dxc_freq = -dxc_freq; // down conversion versus up conversion
- ok &= db_set_duc_freq(dxc_freq, &actual_dxc_freq);
- }
- else {
- ok &= db_set_ddc_freq(dxc_freq, &actual_dxc_freq);
- }
-
- result->dxc_freq = dxc_freq;
- result->residual_freq = dxc_freq - actual_dxc_freq;
- result->inverted = inverted;
- return ok;
-}
-
-static int32_t
-compute_freq_control_word(u2_fxpt_freq_t target_freq, u2_fxpt_freq_t *actual_freq)
-{
- // If we were using floating point, we'd calculate
- // master = 100e6;
- // v = (int) rint(target_freq / master_freq) * pow(2.0, 32.0);
-
- //printf("compute_freq_control_word\n");
- //printf(" target_freq = "); print_fxpt_freq(target_freq); newline();
-
- int32_t master_freq = 100000000; // 100M
-
- int32_t v = ((target_freq << 12)) / master_freq;
- //printf(" fcw = %d\n", v);
-
- *actual_freq = (v * (int64_t) master_freq) >> 12;
-
- //printf(" actual = "); print_fxpt_freq(*actual_freq); newline();
-
- return v;
-}
-
-
-bool
-db_set_ddc_freq(u2_fxpt_freq_t dxc_freq, u2_fxpt_freq_t *actual_dxc_freq)
-{
- int32_t v = compute_freq_control_word(dxc_freq, actual_dxc_freq);
- dsp_rx_regs->freq = v;
- return true;
-}
-
-bool
-db_set_duc_freq(u2_fxpt_freq_t dxc_freq, u2_fxpt_freq_t *actual_dxc_freq)
-{
- int32_t v = compute_freq_control_word(dxc_freq, actual_dxc_freq);
- dsp_tx_regs->freq = v;
- return true;
-}
-
-bool
-db_set_gain(struct db_base *db, u2_fxpt_gain_t gain)
-{
- return db->set_gain(db, gain);
-}
-
-bool
-db_set_antenna(struct db_base *db, int ant)
-{
- if (db->set_antenna == 0) return false;
- return db->set_antenna(db, ant);
-}
projects / debian / gnuradio / commitdiff