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librtlsdr.c
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librtlsdr.c
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/*
* rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver
* Copyright (C) 2012-2014 by Steve Markgraf <steve@steve-m.de>
* Copyright (C) 2012 by Dimitri Stolnikov <horiz0n@gmx.net>
*
* 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 2 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 <errno.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#define min(a, b) (((a) < (b)) ? (a) : (b))
#endif
#include <libusb.h>
/*
* All libusb callback functions should be marked with the LIBUSB_CALL macro
* to ensure that they are compiled with the same calling convention as libusb.
*
* If the macro isn't available in older libusb versions, we simply define it.
*/
#ifndef LIBUSB_CALL
#define LIBUSB_CALL
#endif
/* libusb < 1.0.9 doesn't have libusb_handle_events_timeout_completed */
#ifndef HAVE_LIBUSB_HANDLE_EVENTS_TIMEOUT_COMPLETED
#define libusb_handle_events_timeout_completed(ctx, tv, c) \
libusb_handle_events_timeout(ctx, tv)
#endif
/* two raised to the power of n */
#define TWO_POW(n) ((double)(1ULL<<(n)))
#include "rtl-sdr.h"
#include "tuner_e4k.h"
#include "tuner_fc0012.h"
#include "tuner_fc0013.h"
#include "tuner_fc2580.h"
#include "tuner_r82xx.h"
typedef struct rtlsdr_tuner_iface {
/* tuner interface */
int (*init)(void *);
int (*exit)(void *);
int (*set_freq)(void *, uint32_t freq /* Hz */);
int (*set_bw)(void *, int bw /* Hz */);
int (*set_gain)(void *, int gain /* tenth dB */);
int (*set_if_gain)(void *, int stage, int gain /* tenth dB */);
int (*set_gain_mode)(void *, int manual);
} rtlsdr_tuner_iface_t;
enum rtlsdr_async_status {
RTLSDR_INACTIVE = 0,
RTLSDR_CANCELING,
RTLSDR_RUNNING
};
#define FIR_LEN 16
/*
* FIR coefficients.
*
* The filter is running at XTal frequency. It is symmetric filter with 32
* coefficients. Only first 16 coefficients are specified, the other 16
* use the same values but in reversed order. The first coefficient in
* the array is the outer one, the last, the last is the inner one.
* First 8 coefficients are 8 bit signed integers, the next 8 coefficients
* are 12 bit signed integers. All coefficients have the same weight.
*
* Default FIR coefficients used for DAB/FM by the Windows driver,
* the DVB driver uses different ones
*/
static const int fir_default[FIR_LEN] = {
-54, -36, -41, -40, -32, -14, 14, 53, /* 8 bit signed */
101, 156, 215, 273, 327, 372, 404, 421 /* 12 bit signed */
};
struct rtlsdr_dev {
libusb_context *ctx;
struct libusb_device_handle *devh;
uint32_t xfer_buf_num;
uint32_t xfer_buf_len;
struct libusb_transfer **xfer;
unsigned char **xfer_buf;
rtlsdr_read_async_cb_t cb;
void *cb_ctx;
enum rtlsdr_async_status async_status;
int async_cancel;
int use_zerocopy;
/* rtl demod context */
uint32_t rate; /* Hz */
uint32_t rtl_xtal; /* Hz */
int fir[FIR_LEN];
int direct_sampling;
/* tuner context */
enum rtlsdr_tuner tuner_type;
rtlsdr_tuner_iface_t *tuner;
uint32_t tun_xtal; /* Hz */
uint32_t freq; /* Hz */
uint32_t bw;
uint32_t offs_freq; /* Hz */
int corr; /* ppm */
int gain; /* tenth dB */
struct e4k_state e4k_s;
struct r82xx_config r82xx_c;
struct r82xx_priv r82xx_p;
/* status */
int dev_lost;
int driver_active;
unsigned int xfer_errors;
};
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val);
static int rtlsdr_set_if_freq(rtlsdr_dev_t *dev, uint32_t freq);
/* generic tuner interface functions, shall be moved to the tuner implementations */
int e4000_init(void *dev) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
devt->e4k_s.i2c_addr = E4K_I2C_ADDR;
rtlsdr_get_xtal_freq(devt, NULL, &devt->e4k_s.vco.fosc);
devt->e4k_s.rtl_dev = dev;
return e4k_init(&devt->e4k_s);
}
int e4000_exit(void *dev) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_standby(&devt->e4k_s, 1);
}
int e4000_set_freq(void *dev, uint32_t freq) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_tune_freq(&devt->e4k_s, freq);
}
int e4000_set_bw(void *dev, int bw) {
int r = 0;
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
r |= e4k_if_filter_bw_set(&devt->e4k_s, E4K_IF_FILTER_MIX, bw);
r |= e4k_if_filter_bw_set(&devt->e4k_s, E4K_IF_FILTER_RC, bw);
r |= e4k_if_filter_bw_set(&devt->e4k_s, E4K_IF_FILTER_CHAN, bw);
return r;
}
int e4000_set_gain(void *dev, int gain) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
int mixgain = (gain > 340) ? 12 : 4;
#if 0
int enhgain = (gain - 420);
#endif
if(e4k_set_lna_gain(&devt->e4k_s, min(300, gain - mixgain * 10)) == -EINVAL)
return -1;
if(e4k_mixer_gain_set(&devt->e4k_s, mixgain) == -EINVAL)
return -1;
#if 0 /* enhanced mixer gain seems to have no effect */
if(enhgain >= 0)
if(e4k_set_enh_gain(&devt->e4k_s, enhgain) == -EINVAL)
return -1;
#endif
return 0;
}
int e4000_set_if_gain(void *dev, int stage, int gain) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_if_gain_set(&devt->e4k_s, (uint8_t)stage, (int8_t)(gain / 10));
}
int e4000_set_gain_mode(void *dev, int manual) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_enable_manual_gain(&devt->e4k_s, manual);
}
int _fc0012_init(void *dev) { return fc0012_init(dev); }
int fc0012_exit(void *dev) { return 0; }
int fc0012_set_freq(void *dev, uint32_t freq) {
/* select V-band/U-band filter */
rtlsdr_set_gpio_bit(dev, 6, (freq > 300000000) ? 1 : 0);
return fc0012_set_params(dev, freq, 6000000);
}
int fc0012_set_bw(void *dev, int bw) { return 0; }
int _fc0012_set_gain(void *dev, int gain) { return fc0012_set_gain(dev, gain); }
int fc0012_set_gain_mode(void *dev, int manual) { return 0; }
int _fc0013_init(void *dev) { return fc0013_init(dev); }
int fc0013_exit(void *dev) { return 0; }
int fc0013_set_freq(void *dev, uint32_t freq) {
return fc0013_set_params(dev, freq, 6000000);
}
int fc0013_set_bw(void *dev, int bw) { return 0; }
int _fc0013_set_gain(void *dev, int gain) { return fc0013_set_lna_gain(dev, gain); }
int fc2580_init(void *dev) { return fc2580_Initialize(dev); }
int fc2580_exit(void *dev) { return 0; }
int _fc2580_set_freq(void *dev, uint32_t freq) {
return fc2580_SetRfFreqHz(dev, freq);
}
int fc2580_set_bw(void *dev, int bw) { return fc2580_SetBandwidthMode(dev, 1); }
int fc2580_set_gain(void *dev, int gain) { return 0; }
int fc2580_set_gain_mode(void *dev, int manual) { return 0; }
int r820t_init(void *dev) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
devt->r82xx_p.rtl_dev = dev;
if (devt->tuner_type == RTLSDR_TUNER_R828D) {
devt->r82xx_c.i2c_addr = R828D_I2C_ADDR;
devt->r82xx_c.rafael_chip = CHIP_R828D;
} else {
devt->r82xx_c.i2c_addr = R820T_I2C_ADDR;
devt->r82xx_c.rafael_chip = CHIP_R820T;
}
rtlsdr_get_xtal_freq(devt, NULL, &devt->r82xx_c.xtal);
devt->r82xx_c.max_i2c_msg_len = 8;
devt->r82xx_c.use_predetect = 0;
devt->r82xx_p.cfg = &devt->r82xx_c;
return r82xx_init(&devt->r82xx_p);
}
int r820t_exit(void *dev) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return r82xx_standby(&devt->r82xx_p);
}
int r820t_set_freq(void *dev, uint32_t freq) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return r82xx_set_freq(&devt->r82xx_p, freq);
}
int r820t_set_bw(void *dev, int bw) {
int r;
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
r = r82xx_set_bandwidth(&devt->r82xx_p, bw, devt->rate);
if(r < 0)
return r;
r = rtlsdr_set_if_freq(devt, r);
if (r)
return r;
return rtlsdr_set_center_freq(devt, devt->freq);
}
int r820t_set_gain(void *dev, int gain) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return r82xx_set_gain(&devt->r82xx_p, 1, gain);
}
int r820t_set_gain_mode(void *dev, int manual) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return r82xx_set_gain(&devt->r82xx_p, manual, 0);
}
/* definition order must match enum rtlsdr_tuner */
static rtlsdr_tuner_iface_t tuners[] = {
{
NULL, NULL, NULL, NULL, NULL, NULL, NULL /* dummy for unknown tuners */
},
{
e4000_init, e4000_exit,
e4000_set_freq, e4000_set_bw, e4000_set_gain, e4000_set_if_gain,
e4000_set_gain_mode
},
{
_fc0012_init, fc0012_exit,
fc0012_set_freq, fc0012_set_bw, _fc0012_set_gain, NULL,
fc0012_set_gain_mode
},
{
_fc0013_init, fc0013_exit,
fc0013_set_freq, fc0013_set_bw, _fc0013_set_gain, NULL,
fc0013_set_gain_mode
},
{
fc2580_init, fc2580_exit,
_fc2580_set_freq, fc2580_set_bw, fc2580_set_gain, NULL,
fc2580_set_gain_mode
},
{
r820t_init, r820t_exit,
r820t_set_freq, r820t_set_bw, r820t_set_gain, NULL,
r820t_set_gain_mode
},
{
r820t_init, r820t_exit,
r820t_set_freq, r820t_set_bw, r820t_set_gain, NULL,
r820t_set_gain_mode
},
};
typedef struct rtlsdr_dongle {
uint16_t vid;
uint16_t pid;
const char *name;
} rtlsdr_dongle_t;
/*
* Please add your device here and send a patch to osmocom-sdr@lists.osmocom.org
*/
static rtlsdr_dongle_t known_devices[] = {
{ 0x0bda, 0x2832, "Generic RTL2832U" },
{ 0x0bda, 0x2838, "Generic RTL2832U OEM" },
{ 0x0413, 0x6680, "DigitalNow Quad DVB-T PCI-E card" },
{ 0x0413, 0x6f0f, "Leadtek WinFast DTV Dongle mini D" },
{ 0x0458, 0x707f, "Genius TVGo DVB-T03 USB dongle (Ver. B)" },
{ 0x0ccd, 0x00a9, "Terratec Cinergy T Stick Black (rev 1)" },
{ 0x0ccd, 0x00b3, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
{ 0x0ccd, 0x00b4, "Terratec Deutschlandradio DAB Stick" },
{ 0x0ccd, 0x00b5, "Terratec NOXON DAB Stick - Radio Energy" },
{ 0x0ccd, 0x00b7, "Terratec Media Broadcast DAB Stick" },
{ 0x0ccd, 0x00b8, "Terratec BR DAB Stick" },
{ 0x0ccd, 0x00b9, "Terratec WDR DAB Stick" },
{ 0x0ccd, 0x00c0, "Terratec MuellerVerlag DAB Stick" },
{ 0x0ccd, 0x00c6, "Terratec Fraunhofer DAB Stick" },
{ 0x0ccd, 0x00d3, "Terratec Cinergy T Stick RC (Rev.3)" },
{ 0x0ccd, 0x00d7, "Terratec T Stick PLUS" },
{ 0x0ccd, 0x00e0, "Terratec NOXON DAB/DAB+ USB dongle (rev 2)" },
{ 0x1554, 0x5020, "PixelView PV-DT235U(RN)" },
{ 0x15f4, 0x0131, "Astrometa DVB-T/DVB-T2" },
{ 0x15f4, 0x0133, "HanfTek DAB+FM+DVB-T" },
{ 0x185b, 0x0620, "Compro Videomate U620F"},
{ 0x185b, 0x0650, "Compro Videomate U650F"},
{ 0x185b, 0x0680, "Compro Videomate U680F"},
{ 0x1b80, 0xd393, "GIGABYTE GT-U7300" },
{ 0x1b80, 0xd394, "DIKOM USB-DVBT HD" },
{ 0x1b80, 0xd395, "Peak 102569AGPK" },
{ 0x1b80, 0xd397, "KWorld KW-UB450-T USB DVB-T Pico TV" },
{ 0x1b80, 0xd398, "Zaapa ZT-MINDVBZP" },
{ 0x1b80, 0xd39d, "SVEON STV20 DVB-T USB & FM" },
{ 0x1b80, 0xd3a4, "Twintech UT-40" },
{ 0x1b80, 0xd3a8, "ASUS U3100MINI_PLUS_V2" },
{ 0x1b80, 0xd3af, "SVEON STV27 DVB-T USB & FM" },
{ 0x1b80, 0xd3b0, "SVEON STV21 DVB-T USB & FM" },
{ 0x1d19, 0x1101, "Dexatek DK DVB-T Dongle (Logilink VG0002A)" },
{ 0x1d19, 0x1102, "Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)" },
{ 0x1d19, 0x1103, "Dexatek Technology Ltd. DK 5217 DVB-T Dongle" },
{ 0x1d19, 0x1104, "MSI DigiVox Micro HD" },
{ 0x1f4d, 0xa803, "Sweex DVB-T USB" },
{ 0x1f4d, 0xb803, "GTek T803" },
{ 0x1f4d, 0xc803, "Lifeview LV5TDeluxe" },
{ 0x1f4d, 0xd286, "MyGica TD312" },
{ 0x1f4d, 0xd803, "PROlectrix DV107669" },
{ 0xffff, 0xffff, "Generic RTL2832U" },
};
#define DEFAULT_BUF_NUMBER 15
#define DEFAULT_BUF_LENGTH (16 * 32 * 512)
#define DEF_RTL_XTAL_FREQ 28800000
#define MIN_RTL_XTAL_FREQ (DEF_RTL_XTAL_FREQ - 1000)
#define MAX_RTL_XTAL_FREQ (DEF_RTL_XTAL_FREQ + 1000)
#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
#define CTRL_TIMEOUT 300
#define BULK_TIMEOUT 0
#define EEPROM_ADDR 0xa0
enum usb_reg {
USB_SYSCTL = 0x2000,
USB_CTRL = 0x2010,
USB_STAT = 0x2014,
USB_EPA_CFG = 0x2144,
USB_EPA_CTL = 0x2148,
USB_EPA_MAXPKT = 0x2158,
USB_EPA_MAXPKT_2 = 0x215a,
USB_EPA_FIFO_CFG = 0x2160,
};
enum sys_reg {
DEMOD_CTL = 0x3000,
GPO = 0x3001,
GPI = 0x3002,
GPOE = 0x3003,
GPD = 0x3004,
SYSINTE = 0x3005,
SYSINTS = 0x3006,
GP_CFG0 = 0x3007,
GP_CFG1 = 0x3008,
SYSINTE_1 = 0x3009,
SYSINTS_1 = 0x300a,
DEMOD_CTL_1 = 0x300b,
IR_SUSPEND = 0x300c,
};
enum blocks {
DEMODB = 0,
USBB = 1,
SYSB = 2,
TUNB = 3,
ROMB = 4,
IRB = 5,
IICB = 6,
};
int rtlsdr_read_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
{
int r;
uint16_t index = (block << 8);
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, array, len, CTRL_TIMEOUT);
#if 0
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
#endif
return r;
}
int rtlsdr_write_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
{
int r;
uint16_t index = (block << 8) | 0x10;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, array, len, CTRL_TIMEOUT);
#if 0
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
#endif
return r;
}
int rtlsdr_i2c_write_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg, uint8_t val)
{
uint16_t addr = i2c_addr;
uint8_t data[2];
data[0] = reg;
data[1] = val;
return rtlsdr_write_array(dev, IICB, addr, (uint8_t *)&data, 2);
}
uint8_t rtlsdr_i2c_read_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg)
{
uint16_t addr = i2c_addr;
uint8_t data = 0;
rtlsdr_write_array(dev, IICB, addr, ®, 1);
rtlsdr_read_array(dev, IICB, addr, &data, 1);
return data;
}
int rtlsdr_i2c_write(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
{
uint16_t addr = i2c_addr;
if (!dev)
return -1;
return rtlsdr_write_array(dev, IICB, addr, buffer, len);
}
int rtlsdr_i2c_read(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
{
uint16_t addr = i2c_addr;
if (!dev)
return -1;
return rtlsdr_read_array(dev, IICB, addr, buffer, len);
}
uint16_t rtlsdr_read_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = (block << 8);
uint16_t reg;
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
reg = (data[1] << 8) | data[0];
return reg;
}
int rtlsdr_write_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint16_t val, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = (block << 8) | 0x10;
if (len == 1)
data[0] = val & 0xff;
else
data[0] = val >> 8;
data[1] = val & 0xff;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
return r;
}
uint16_t rtlsdr_demod_read_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = page;
uint16_t reg;
addr = (addr << 8) | 0x20;
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
reg = (data[1] << 8) | data[0];
return reg;
}
int rtlsdr_demod_write_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint16_t val, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = 0x10 | page;
addr = (addr << 8) | 0x20;
if (len == 1)
data[0] = val & 0xff;
else
data[0] = val >> 8;
data[1] = val & 0xff;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
rtlsdr_demod_read_reg(dev, 0x0a, 0x01, 1);
return (r == len) ? 0 : -1;
}
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val)
{
uint16_t r;
gpio = 1 << gpio;
r = rtlsdr_read_reg(dev, SYSB, GPO, 1);
r = val ? (r | gpio) : (r & ~gpio);
rtlsdr_write_reg(dev, SYSB, GPO, r, 1);
}
void rtlsdr_set_gpio_output(rtlsdr_dev_t *dev, uint8_t gpio)
{
int r;
gpio = 1 << gpio;
r = rtlsdr_read_reg(dev, SYSB, GPD, 1);
rtlsdr_write_reg(dev, SYSB, GPD, r & ~gpio, 1);
r = rtlsdr_read_reg(dev, SYSB, GPOE, 1);
rtlsdr_write_reg(dev, SYSB, GPOE, r | gpio, 1);
}
int rtlsdr_set_gpio(rtlsdr_dev_t *dev, int on, int gpio)
{
if (!dev)
return -1;
//rtlsdr_set_gpio_output(dev, gpio);
rtlsdr_set_gpio_bit(dev, gpio, on);
return 1;
}
void rtlsdr_set_i2c_repeater(rtlsdr_dev_t *dev, int on)
{
rtlsdr_demod_write_reg(dev, 1, 0x01, on ? 0x18 : 0x10, 1);
}
int rtlsdr_set_fir(rtlsdr_dev_t *dev)
{
uint8_t fir[20];
int i;
/* format: int8_t[8] */
for (i = 0; i < 8; ++i) {
const int val = dev->fir[i];
if (val < -128 || val > 127) {
return -1;
}
fir[i] = val;
}
/* format: int12_t[8] */
for (i = 0; i < 8; i += 2) {
const int val0 = dev->fir[8+i];
const int val1 = dev->fir[8+i+1];
if (val0 < -2048 || val0 > 2047 || val1 < -2048 || val1 > 2047) {
return -1;
}
fir[8+i*3/2] = val0 >> 4;
fir[8+i*3/2+1] = (val0 << 4) | ((val1 >> 8) & 0x0f);
fir[8+i*3/2+2] = val1;
}
for (i = 0; i < (int)sizeof(fir); i++) {
if (rtlsdr_demod_write_reg(dev, 1, 0x1c + i, fir[i], 1))
return -1;
}
return 0;
}
void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
{
unsigned int i;
/* initialize USB */
rtlsdr_write_reg(dev, USBB, USB_SYSCTL, 0x09, 1);
rtlsdr_write_reg(dev, USBB, USB_EPA_MAXPKT, 0x0002, 2);
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
/* poweron demod */
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL_1, 0x22, 1);
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0xe8, 1);
/* reset demod (bit 3, soft_rst) */
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
/* disable spectrum inversion and adjacent channel rejection */
rtlsdr_demod_write_reg(dev, 1, 0x15, 0x00, 1);
rtlsdr_demod_write_reg(dev, 1, 0x16, 0x0000, 2);
/* clear both DDC shift and IF frequency registers */
for (i = 0; i < 6; i++)
rtlsdr_demod_write_reg(dev, 1, 0x16 + i, 0x00, 1);
rtlsdr_set_fir(dev);
/* enable SDR mode, disable DAGC (bit 5) */
rtlsdr_demod_write_reg(dev, 0, 0x19, 0x05, 1);
/* init FSM state-holding register */
rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
rtlsdr_demod_write_reg(dev, 1, 0x94, 0x0f, 1);
/* disable AGC (en_dagc, bit 0) (this seems to have no effect) */
rtlsdr_demod_write_reg(dev, 1, 0x11, 0x00, 1);
/* disable RF and IF AGC loop */
rtlsdr_demod_write_reg(dev, 1, 0x04, 0x00, 1);
/* disable PID filter (enable_PID = 0) */
rtlsdr_demod_write_reg(dev, 0, 0x61, 0x60, 1);
/* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
rtlsdr_demod_write_reg(dev, 0, 0x06, 0x80, 1);
/* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
* IQ estimation/compensation (en_iq_comp, en_iq_est) */
rtlsdr_demod_write_reg(dev, 1, 0xb1, 0x1b, 1);
/* disable 4.096 MHz clock output on pin TP_CK0 */
rtlsdr_demod_write_reg(dev, 0, 0x0d, 0x83, 1);
}
int rtlsdr_deinit_baseband(rtlsdr_dev_t *dev)
{
int r = 0;
if (!dev)
return -1;
if (dev->tuner && dev->tuner->exit) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->exit(dev); /* deinitialize tuner */
rtlsdr_set_i2c_repeater(dev, 0);
}
/* poweroff demodulator and ADCs */
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0x20, 1);
return r;
}
static int rtlsdr_set_if_freq(rtlsdr_dev_t *dev, uint32_t freq)
{
uint32_t rtl_xtal;
int32_t if_freq;
uint8_t tmp;
int r;
if (!dev)
return -1;
/* read corrected clock value */
if (rtlsdr_get_xtal_freq(dev, &rtl_xtal, NULL))
return -2;
if_freq = ((freq * TWO_POW(22)) / rtl_xtal) * (-1);
tmp = (if_freq >> 16) & 0x3f;
r = rtlsdr_demod_write_reg(dev, 1, 0x19, tmp, 1);
tmp = (if_freq >> 8) & 0xff;
r |= rtlsdr_demod_write_reg(dev, 1, 0x1a, tmp, 1);
tmp = if_freq & 0xff;
r |= rtlsdr_demod_write_reg(dev, 1, 0x1b, tmp, 1);
return r;
}
int rtlsdr_set_sample_freq_correction(rtlsdr_dev_t *dev, int ppm)
{
int r = 0;
uint8_t tmp;
int16_t offs = ppm * (-1) * TWO_POW(24) / 1000000;
tmp = offs & 0xff;
r |= rtlsdr_demod_write_reg(dev, 1, 0x3f, tmp, 1);
tmp = (offs >> 8) & 0x3f;
r |= rtlsdr_demod_write_reg(dev, 1, 0x3e, tmp, 1);
return r;
}
int rtlsdr_set_xtal_freq(rtlsdr_dev_t *dev, uint32_t rtl_freq, uint32_t tuner_freq)
{
int r = 0;
if (!dev)
return -1;
if (rtl_freq > 0 &&
(rtl_freq < MIN_RTL_XTAL_FREQ || rtl_freq > MAX_RTL_XTAL_FREQ))
return -2;
if (rtl_freq > 0 && dev->rtl_xtal != rtl_freq) {
dev->rtl_xtal = rtl_freq;
/* update xtal-dependent settings */
if (dev->rate)
r = rtlsdr_set_sample_rate(dev, dev->rate);
}
if (dev->tun_xtal != tuner_freq) {
if (0 == tuner_freq)
dev->tun_xtal = dev->rtl_xtal;
else
dev->tun_xtal = tuner_freq;
/* read corrected clock value into e4k and r82xx structure */
if (rtlsdr_get_xtal_freq(dev, NULL, &dev->e4k_s.vco.fosc) ||
rtlsdr_get_xtal_freq(dev, NULL, &dev->r82xx_c.xtal))
return -3;
/* update xtal-dependent settings */
if (dev->freq)
r = rtlsdr_set_center_freq(dev, dev->freq);
}
return r;
}
int rtlsdr_get_xtal_freq(rtlsdr_dev_t *dev, uint32_t *rtl_freq, uint32_t *tuner_freq)
{
if (!dev)
return -1;
#define APPLY_PPM_CORR(val,ppm) (((val) * (1.0 + (ppm) / 1e6)))
if (rtl_freq)
*rtl_freq = (uint32_t) APPLY_PPM_CORR(dev->rtl_xtal, dev->corr);
if (tuner_freq)
*tuner_freq = (uint32_t) APPLY_PPM_CORR(dev->tun_xtal, dev->corr);
return 0;
}
int rtlsdr_get_usb_strings(rtlsdr_dev_t *dev, char *manufact, char *product,
char *serial)
{
struct libusb_device_descriptor dd;
libusb_device *device = NULL;
const int buf_max = 256;
int r = 0;
if (!dev || !dev->devh)
return -1;
device = libusb_get_device(dev->devh);
r = libusb_get_device_descriptor(device, &dd);
if (r < 0)
return -1;
if (manufact) {
memset(manufact, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iManufacturer,
(unsigned char *)manufact,
buf_max);
}
if (product) {
memset(product, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iProduct,
(unsigned char *)product,
buf_max);
}
if (serial) {
memset(serial, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iSerialNumber,
(unsigned char *)serial,
buf_max);
}
return 0;
}
int rtlsdr_write_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len)
{
int r = 0;
int i;
uint8_t cmd[2];
if (!dev)
return -1;
if ((len + offset) > 256)
return -2;
for (i = 0; i < len; i++) {
cmd[0] = i + offset;
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, cmd, 1);
r = rtlsdr_read_array(dev, IICB, EEPROM_ADDR, &cmd[1], 1);
/* only write the byte if it differs */
if (cmd[1] == data[i])
continue;
cmd[1] = data[i];
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, cmd, 2);
if (r != sizeof(cmd))
return -3;
/* for some EEPROMs (e.g. ATC 240LC02) we need a delay
* between write operations, otherwise they will fail */
#ifdef _WIN32
Sleep(5);
#else
usleep(5000);
#endif
}
return 0;
}
int rtlsdr_read_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len)
{
int r = 0;
int i;
if (!dev)
return -1;
if ((len + offset) > 256)
return -2;
r = rtlsdr_write_array(dev, IICB, EEPROM_ADDR, &offset, 1);
if (r < 0)
return -3;
for (i = 0; i < len; i++) {
r = rtlsdr_read_array(dev, IICB, EEPROM_ADDR, data + i, 1);
if (r < 0)
return -3;
}
return r;
}
int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
{
int r = -1;
if (!dev || !dev->tuner)
return -1;
if (dev->direct_sampling) {
r = rtlsdr_set_if_freq(dev, freq);
} else if (dev->tuner && dev->tuner->set_freq) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->set_freq(dev, freq - dev->offs_freq);
rtlsdr_set_i2c_repeater(dev, 0);
}
if (!r)
dev->freq = freq;
else
dev->freq = 0;
return r;
}
uint32_t rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->freq;
}
int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm)
{
int r = 0;
if (!dev)
return -1;
if (dev->corr == ppm)
return -2;
dev->corr = ppm;
r |= rtlsdr_set_sample_freq_correction(dev, ppm);
/* read corrected clock value into e4k and r82xx structure */
if (rtlsdr_get_xtal_freq(dev, NULL, &dev->e4k_s.vco.fosc) ||
rtlsdr_get_xtal_freq(dev, NULL, &dev->r82xx_c.xtal))
return -3;
if (dev->freq) /* retune to apply new correction value */
r |= rtlsdr_set_center_freq(dev, dev->freq);
return r;
}
int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->corr;
}
enum rtlsdr_tuner rtlsdr_get_tuner_type(rtlsdr_dev_t *dev)
{
if (!dev)
return RTLSDR_TUNER_UNKNOWN;
return dev->tuner_type;
}
int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains)
{
/* all gain values are expressed in tenths of a dB */
const int e4k_gains[] = { -10, 15, 40, 65, 90, 115, 140, 165, 190, 215,
240, 290, 340, 420 };
const int fc0012_gains[] = { -99, -40, 71, 179, 192 };
const int fc0013_gains[] = { -99, -73, -65, -63, -60, -58, -54, 58, 61,
63, 65, 67, 68, 70, 71, 179, 181, 182,
184, 186, 188, 191, 197 };
const int fc2580_gains[] = { 0 /* no gain values */ };
const int r82xx_gains[] = { 0, 9, 14, 27, 37, 77, 87, 125, 144, 157,
166, 197, 207, 229, 254, 280, 297, 328,
338, 364, 372, 386, 402, 421, 434, 439,
445, 480, 496 };
const int unknown_gains[] = { 0 /* no gain values */ };
const int *ptr = NULL;
int len = 0;
if (!dev)
return -1;
switch (dev->tuner_type) {
case RTLSDR_TUNER_E4000:
ptr = e4k_gains; len = sizeof(e4k_gains);
break;
case RTLSDR_TUNER_FC0012:
ptr = fc0012_gains; len = sizeof(fc0012_gains);
break;