You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
531 lines
12 KiB
531 lines
12 KiB
/*
|
|
* rtl-sdr, a poor man's SDR using a Realtek RTL2832 based DVB-stick
|
|
* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
|
|
*
|
|
* 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>
|
|
#include <math.h>
|
|
#include <unistd.h>
|
|
|
|
#include <libusb.h>
|
|
|
|
#include "tuner_e4000.h"
|
|
#include "tuner_fc0013.h"
|
|
|
|
/* generic tuner interface functions, shall be moved to the tuner implementations */
|
|
int e4k_init(void *dev) { return e4000_Initialize(dev); }
|
|
int e4k_exit(void *dev) { return 0; }
|
|
int e4k_tune(void *dev, int freq) { return e4000_SetRfFreqHz(dev, freq); }
|
|
int e4k_set_bw(void *dev, int bw) { return e4000_SetBandwidthHz(dev, 8000000); }
|
|
|
|
int fc0012_init(void *dev) { return 0; }
|
|
int fc0012_exit(void *dev) { return 0; }
|
|
int fc0012_tune(void *dev, int freq) { return 0; }
|
|
int fc0012_set_bw(void *dev, int bw) { return 0; }
|
|
|
|
int fc0013_init(void *dev) { return FC0013_Open(dev); }
|
|
int fc0013_exit(void *dev) { return 0; }
|
|
int fc0013_tune(void *dev, int freq) {
|
|
/* read bandwidth mode to reapply it */
|
|
int bw = 0;
|
|
//fc0013_GetBandwidthMode(dev, &bw); // FIXME: missing
|
|
return FC0013_SetFrequency(dev, freq/1000, bw & 0xff);
|
|
}
|
|
|
|
int fc0013_set_bw(void *dev, int bw) {
|
|
/* read frequency to reapply it */
|
|
unsigned long freq = 0;
|
|
//fc0013_GetRfFreqHz(dev, &freq); // FIXME: missing
|
|
return FC0013_SetFrequency(dev, freq/1000, 8);
|
|
}
|
|
|
|
enum rtlsdr_tuners {
|
|
RTLSDR_TUNER_UNDEF,
|
|
RTLSDR_TUNER_E4000,
|
|
RTLSDR_TUNER_FC0012,
|
|
RTLSDR_TUNER_FC0013
|
|
};
|
|
|
|
typedef struct rtlsdr_tuner {
|
|
enum rtlsdr_tuners tuner;
|
|
int(*init)(void *);
|
|
int(*exit)(void *);
|
|
int(*tune)(void *, int freq /* Hz */);
|
|
int(*set_bw)(void *, int bw /* Hz */);
|
|
int freq; /* Hz */
|
|
int corr; /* ppm */
|
|
} rtlsdr_tuner_t;
|
|
|
|
rtlsdr_tuner_t tuners[] = {
|
|
{ RTLSDR_TUNER_E4000, e4k_init, e4k_exit, e4k_tune, e4k_set_bw, 0, 0 },
|
|
{ RTLSDR_TUNER_FC0012, fc0012_init, fc0012_exit, fc0012_tune, fc0012_set_bw, 0, 0 },
|
|
{ RTLSDR_TUNER_FC0013, fc0013_init, fc0013_exit, fc0013_tune, fc0013_set_bw, 0, 0 },
|
|
};
|
|
|
|
struct rtlsdr_device {
|
|
uint16_t vid;
|
|
uint16_t pid;
|
|
} devices[] = {
|
|
{ 0x0bda, 0x2832 }, /* default RTL2832U vid/pid (eg. hama nano) */
|
|
{ 0x0bda, 0x2838 }, /* ezcap USB 2.0 DVB-T/DAB/FM stick */
|
|
{ 0x0ccd, 0x00b3 }, /* Terratec NOXON DAB/DAB+ USB-Stick */
|
|
{ 0x1f4d, 0xb803 }, /* GTek T803 */
|
|
{ 0x1b80, 0xd3a4 }, /* Twintech UT-40 */
|
|
};
|
|
|
|
typedef struct {
|
|
struct libusb_device_handle *devh;
|
|
rtlsdr_tuner_t *tuner;
|
|
} rtlsdr_dev_t;
|
|
|
|
#define CRYSTAL_FREQ 28800000
|
|
|
|
#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
|
|
#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
|
|
|
|
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, 0);
|
|
|
|
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, 0);
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_i2c_write(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
|
|
{
|
|
uint16_t addr = i2c_addr;
|
|
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;
|
|
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, 0);
|
|
|
|
if (r < 0)
|
|
printf("%s failed\n", __FUNCTION__);
|
|
|
|
reg = (data[1] << 8) | data[0];
|
|
|
|
return reg;
|
|
}
|
|
|
|
void 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, 0);
|
|
|
|
if (r < 0)
|
|
printf("%s failed\n", __FUNCTION__);
|
|
}
|
|
|
|
uint16_t rtlsdr_demod_read_reg(rtlsdr_dev_t *dev, uint8_t page, uint8_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, 0);
|
|
|
|
if (r < 0)
|
|
printf("%s failed\n", __FUNCTION__);
|
|
|
|
reg = (data[1] << 8) | data[0];
|
|
|
|
return reg;
|
|
}
|
|
|
|
void 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, 0);
|
|
|
|
if (r < 0)
|
|
printf("%s failed\n", __FUNCTION__);
|
|
|
|
rtlsdr_demod_read_reg(dev, 0x0a, 0x01, 1);
|
|
}
|
|
|
|
void rtlsdr_set_i2c_repeater(rtlsdr_dev_t *dev, int on)
|
|
{
|
|
rtlsdr_demod_write_reg(dev, 1, 0x01, on ? 0x18 : 0x10, 1);
|
|
}
|
|
|
|
void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* default FIR coefficients used for DAB/FM by the Windows driver,
|
|
* the DVB driver uses different ones */
|
|
uint8_t fir_coeff[] = {
|
|
0xca, 0xdc, 0xd7, 0xd8, 0xe0, 0xf2, 0x0e, 0x35, 0x06, 0x50,
|
|
0x9c, 0x0d, 0x71, 0x11, 0x14, 0x71, 0x74, 0x19, 0x41, 0x00,
|
|
};
|
|
|
|
/* 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);
|
|
|
|
/* set IF-frequency to 0 Hz */
|
|
rtlsdr_demod_write_reg(dev, 1, 0x19, 0x0000, 2);
|
|
|
|
/* set FIR coefficients */
|
|
for (i = 0; i < sizeof (fir_coeff); i++)
|
|
rtlsdr_demod_write_reg(dev, 1, 0x1c + i, fir_coeff[i], 1);
|
|
|
|
rtlsdr_demod_write_reg(dev, 0, 0x19, 0x25, 1);
|
|
|
|
/* init FSM state-holding register */
|
|
rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
|
|
|
|
/* disable AGC (en_dagc, bit 0) */
|
|
rtlsdr_demod_write_reg(dev, 1, 0x11, 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);
|
|
}
|
|
|
|
int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
|
|
{
|
|
rtlsdr_set_i2c_repeater(dev, 1);
|
|
|
|
if (dev->tuner) {
|
|
dev->tuner->freq = freq;
|
|
double f = (double) freq;
|
|
f *= 1.0 + dev->tuner->corr / 1e6;
|
|
dev->tuner->tune((void *)dev, (int) f);
|
|
printf("Tuned to %i Hz\n", freq);
|
|
}
|
|
|
|
rtlsdr_set_i2c_repeater(dev, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
|
|
{
|
|
return 0; // TODO: implement
|
|
}
|
|
|
|
int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int32_t ppm)
|
|
{
|
|
if (dev->tuner) {
|
|
if (dev->tuner->corr == ppm)
|
|
return -1;
|
|
|
|
dev->tuner->corr = ppm;
|
|
|
|
/* retune to apply new correction value */
|
|
rtlsdr_set_center_freq(dev, dev->tuner->freq);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int32_t rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
|
|
{
|
|
if (dev->tuner)
|
|
return dev->tuner->corr;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
|
|
{
|
|
uint16_t tmp;
|
|
uint32_t rsamp_ratio;
|
|
double real_rate;
|
|
|
|
/* check for the maximum rate the resampler supports */
|
|
if (samp_rate > 3200000)
|
|
samp_rate = 3200000;
|
|
|
|
rsamp_ratio = (CRYSTAL_FREQ * pow(2, 22)) / samp_rate;
|
|
rsamp_ratio &= ~3;
|
|
|
|
real_rate = (CRYSTAL_FREQ * pow(2, 22)) / rsamp_ratio;
|
|
printf("Setting sample rate: %.3f Hz\n", real_rate);
|
|
|
|
if (dev->tuner)
|
|
dev->tuner->set_bw((void *)dev, real_rate);
|
|
|
|
tmp = (rsamp_ratio >> 16);
|
|
rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2);
|
|
tmp = rsamp_ratio & 0xffff;
|
|
rtlsdr_demod_write_reg(dev, 1, 0xa1, tmp, 2);
|
|
}
|
|
|
|
int rtlsdr_get_sample_rate(rtlsdr_dev_t *dev)
|
|
{
|
|
return 0; // TODO: implement
|
|
}
|
|
|
|
int rtlsdr_init(void)
|
|
{
|
|
return libusb_init(NULL);
|
|
}
|
|
|
|
void rtlsdr_exit(void)
|
|
{
|
|
libusb_exit(NULL);
|
|
}
|
|
|
|
uint32_t rtlsdr_get_device_count(void)
|
|
{
|
|
int i, j;
|
|
libusb_device **list;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
|
|
ssize_t cnt = libusb_get_device_list(NULL, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
|
|
if (devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct)
|
|
device_count++;
|
|
}
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
return device_count;
|
|
}
|
|
|
|
const char *rtlsdr_get_device_name(uint32_t index)
|
|
{
|
|
libusb_device **list;
|
|
|
|
ssize_t cnt = libusb_get_device_list(NULL, &list);
|
|
|
|
if (index > cnt - 1)
|
|
return NULL;
|
|
|
|
/*libusb_device *device = list[index];*/
|
|
|
|
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
return "TODO: implement";
|
|
}
|
|
|
|
rtlsdr_dev_t *rtlsdr_open(int index)
|
|
{
|
|
int r;
|
|
int i, j;
|
|
libusb_device **list;
|
|
rtlsdr_dev_t * dev = NULL;
|
|
libusb_device *device = NULL;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
|
|
dev = malloc(sizeof(rtlsdr_dev_t));
|
|
memset(dev, 0, sizeof(rtlsdr_dev_t));
|
|
|
|
ssize_t cnt = libusb_get_device_list(NULL, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
device = list[i];
|
|
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
|
|
if ( devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct ) {
|
|
device_count++;
|
|
if (index == device_count - 1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (index == device_count - 1)
|
|
break;
|
|
|
|
device = NULL;
|
|
}
|
|
|
|
if (!device)
|
|
goto err;
|
|
|
|
r = libusb_open(device, &dev->devh);
|
|
if (r < 0) {
|
|
libusb_free_device_list(list, 0);
|
|
fprintf(stderr, "usb_open error %d\n", r);
|
|
goto err;
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
unsigned char buffer[256];
|
|
|
|
libusb_get_string_descriptor_ascii(dev->devh, 0, buffer, sizeof(buffer));
|
|
printf("sn#: %s\n", buffer);
|
|
|
|
libusb_get_string_descriptor_ascii(dev->devh, 1, buffer, sizeof(buffer));
|
|
printf("manufacturer: %s\n", buffer);
|
|
|
|
libusb_get_string_descriptor_ascii(dev->devh, 2, buffer, sizeof(buffer));
|
|
printf("product: %s\n", buffer);
|
|
|
|
r = libusb_claim_interface(dev->devh, 0);
|
|
if (r < 0) {
|
|
fprintf(stderr, "usb_claim_interface error %d\n", r);
|
|
goto err;
|
|
}
|
|
|
|
rtlsdr_init_baseband(dev);
|
|
|
|
// TODO: probe the tuner and set dev->tuner member to appropriate tuner object
|
|
// dev->tuner = &tuners[...];
|
|
|
|
return dev;
|
|
err:
|
|
return NULL;
|
|
}
|
|
|
|
int rtlsdr_close(rtlsdr_dev_t *dev)
|
|
{
|
|
libusb_release_interface(dev->devh, 0);
|
|
libusb_close(dev->devh);
|
|
free(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_reset_buffer(rtlsdr_dev_t *dev)
|
|
{
|
|
return 0; // TODO: implement
|
|
}
|
|
|
|
int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read)
|
|
{
|
|
return libusb_bulk_transfer(dev->devh, 0x81, buf, len, n_read, 3000);
|
|
}
|
|
#if 0
|
|
int rtlsdr_async_loop(rtlsdr_dev_t *dev, rtlsdr_async_read_cb_t cb, void *ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|