731 lines
16 KiB
C
731 lines
16 KiB
C
/*
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* rtl-sdr, a poor man's SDR using a Realtek RTL2832 based DVB-stick
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* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <unistd.h>
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#include <libusb.h>
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#include "tuner_e4000.h"
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#include "tuner_fc0012.h"
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#include "tuner_fc0013.h"
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typedef struct rtlsdr_tuner {
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int(*init)(void *);
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int(*exit)(void *);
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int(*tune)(void *, int freq /* Hz */);
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int(*set_bw)(void *, int bw /* Hz */);
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int(*set_gain)(void *, int gain /* dB */);
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int freq; /* Hz */
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int corr; /* ppm */
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int gain; /* dB */
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} rtlsdr_tuner_t;
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/* generic tuner interface functions, shall be moved to the tuner implementations */
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int e4k_init(void *dev) { return e4000_Initialize(dev); }
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int e4k_exit(void *dev) { return 0; }
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int e4k_tune(void *dev, int freq) { return e4000_SetRfFreqHz(dev, freq); }
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int e4k_set_bw(void *dev, int bw) { return e4000_SetBandwidthHz(dev, 8000000); }
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int e4k_set_gain(void *dev, int gain) { return 0; }
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int fc0012_init(void *dev) { return FC0012_Open(dev); }
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int fc0012_exit(void *dev) { return 0; }
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int fc0012_tune(void *dev, int freq) {
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/* TODO set GPIO6 accordingly */
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unsigned int bw = 6;
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return FC0012_SetFrequency(dev, freq/1000, bw & 0xff);
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}
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int fc0012_set_bw(void *dev, int bw) {
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unsigned long freq = ((rtlsdr_tuner_t *)dev)->freq;
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return FC0013_SetFrequency(dev, freq/1000, bw/1000000);
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}
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int fc0012_set_gain(void *dev, int gain) { return 0; }
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int fc0013_init(void *dev) { return FC0013_Open(dev); }
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int fc0013_exit(void *dev) { return 0; }
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int fc0013_tune(void *dev, int freq) {
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unsigned int bw = 6;
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return FC0013_SetFrequency(dev, freq/1000, bw & 0xff);
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}
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int fc0013_set_bw(void *dev, int bw) {
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unsigned long freq = ((rtlsdr_tuner_t *)dev)->freq;
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return FC0013_SetFrequency(dev, freq/1000, bw/1000000);
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}
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int fc0013_set_gain(void *dev, int gain) { return 0; }
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enum rtlsdr_tuners {
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RTLSDR_TUNER_E4000,
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RTLSDR_TUNER_FC0012,
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RTLSDR_TUNER_FC0013,
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};
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static rtlsdr_tuner_t tuners[] = {
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{ e4k_init, e4k_exit, e4k_tune, e4k_set_bw, e4k_set_gain, 0, 0, 0 },
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{ fc0012_init, fc0012_exit, fc0012_tune, fc0012_set_bw, fc0012_set_gain, 0, 0, 0 },
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{ fc0013_init, fc0013_exit, fc0013_tune, fc0013_set_bw, fc0013_set_gain, 0, 0, 0 },
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};
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typedef struct rtlsdr_device {
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uint16_t vid;
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uint16_t pid;
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const char *name;
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} rtlsdr_device_t;
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static rtlsdr_device_t devices[] = {
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{ 0x0bda, 0x2832, "Generic RTL2832U (e.g. hama nano)" },
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{ 0x0bda, 0x2838, "ezcap USB 2.0 DVB-T/DAB/FM dongle" },
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{ 0x0ccd, 0x00b3, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
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{ 0x0ccd, 0x00e0, "Terratec NOXON DAB/DAB+ USB dongle (rev 2)" },
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{ 0x1f4d, 0xb803, "GTek T803" },
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{ 0x1b80, 0xd3a4, "Twintech UT-40" },
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{ 0x1d19, 0x1101, "Dexatek DK DVB-T Dongle (Logilink VG0002A)" },
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};
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typedef struct {
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struct libusb_device_handle *devh;
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rtlsdr_tuner_t *tuner;
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int rate; /* Hz */
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} rtlsdr_dev_t;
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static int opened_devices = 0;
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static int libusb_inited = 0;
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#define CRYSTAL_FREQ 28800000
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#define MAX_SAMP_RATE 3200000
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#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
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#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
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enum usb_reg {
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USB_SYSCTL = 0x2000,
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USB_CTRL = 0x2010,
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USB_STAT = 0x2014,
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USB_EPA_CFG = 0x2144,
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USB_EPA_CTL = 0x2148,
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USB_EPA_MAXPKT = 0x2158,
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USB_EPA_MAXPKT_2 = 0x215a,
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USB_EPA_FIFO_CFG = 0x2160,
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};
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enum sys_reg {
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DEMOD_CTL = 0x3000,
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GPO = 0x3001,
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GPI = 0x3002,
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GPOE = 0x3003,
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GPD = 0x3004,
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SYSINTE = 0x3005,
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SYSINTS = 0x3006,
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GP_CFG0 = 0x3007,
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GP_CFG1 = 0x3008,
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SYSINTE_1 = 0x3009,
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SYSINTS_1 = 0x300a,
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DEMOD_CTL_1 = 0x300b,
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IR_SUSPEND = 0x300c,
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};
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enum blocks {
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DEMODB = 0,
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USBB = 1,
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SYSB = 2,
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TUNB = 3,
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ROMB = 4,
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IRB = 5,
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IICB = 6,
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};
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int rtlsdr_read_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
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{
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int r;
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uint16_t index = (block << 8);
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, array, len, 0);
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return r;
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}
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int rtlsdr_write_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
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{
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int r;
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uint16_t index = (block << 8) | 0x10;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, array, len, 0);
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return r;
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}
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int rtlsdr_i2c_write_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg, uint8_t val)
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{
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uint16_t addr = i2c_addr;
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uint8_t data[2];
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data[0] = reg;
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data[1] = val;
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return rtlsdr_write_array(dev, IICB, addr, (uint8_t *)&data, 2);
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}
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uint8_t rtlsdr_i2c_read_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg)
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{
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uint16_t addr = i2c_addr;
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uint8_t data;
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rtlsdr_write_array(dev, IICB, addr, ®, 1);
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rtlsdr_read_array(dev, IICB, addr, &data, 1);
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return data;
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}
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int rtlsdr_i2c_write(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
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{
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uint16_t addr = i2c_addr;
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if (!dev)
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return -1;
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return rtlsdr_write_array(dev, IICB, addr, buffer, len);
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}
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int rtlsdr_i2c_read(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
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{
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uint16_t addr = i2c_addr;
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if (!dev)
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return -1;
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return rtlsdr_read_array(dev, IICB, addr, buffer, len);
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}
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uint16_t rtlsdr_read_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = (block << 8);
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uint16_t reg;
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, 0);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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reg = (data[1] << 8) | data[0];
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return reg;
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}
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void rtlsdr_write_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint16_t val, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = (block << 8) | 0x10;
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if (len == 1)
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data[0] = val & 0xff;
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else
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data[0] = val >> 8;
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data[1] = val & 0xff;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, 0);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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}
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uint16_t rtlsdr_demod_read_reg(rtlsdr_dev_t *dev, uint8_t page, uint8_t addr, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = page;
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uint16_t reg;
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addr = (addr << 8) | 0x20;
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, 0);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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reg = (data[1] << 8) | data[0];
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return reg;
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}
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void rtlsdr_demod_write_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint16_t val, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = 0x10 | page;
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addr = (addr << 8) | 0x20;
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if (len == 1)
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data[0] = val & 0xff;
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else
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data[0] = val >> 8;
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data[1] = val & 0xff;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, 0);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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rtlsdr_demod_read_reg(dev, 0x0a, 0x01, 1);
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}
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void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val)
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{
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uint8_t r;
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gpio = 1 << gpio;
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r = rtlsdr_read_reg(dev, SYSB, GPO, 1);
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r = val ? (r | gpio) : (r & ~gpio);
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rtlsdr_write_reg(dev, SYSB, GPO, r, 1);
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}
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void rtlsdr_set_gpio_output(rtlsdr_dev_t *dev, uint8_t gpio)
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{
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int r;
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gpio = 1 << gpio;
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r = rtlsdr_read_reg(dev, SYSB, GPD, 1);
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rtlsdr_write_reg(dev, SYSB, GPO, r & ~gpio, 1);
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r = rtlsdr_read_reg(dev, SYSB, GPOE, 1);
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rtlsdr_write_reg(dev, SYSB, GPOE, r | gpio, 1);
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}
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void rtlsdr_set_i2c_repeater(rtlsdr_dev_t *dev, int on)
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{
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rtlsdr_demod_write_reg(dev, 1, 0x01, on ? 0x18 : 0x10, 1);
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}
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void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
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{
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unsigned int i;
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/* default FIR coefficients used for DAB/FM by the Windows driver,
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* the DVB driver uses different ones */
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uint8_t fir_coeff[] = {
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0xca, 0xdc, 0xd7, 0xd8, 0xe0, 0xf2, 0x0e, 0x35, 0x06, 0x50,
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0x9c, 0x0d, 0x71, 0x11, 0x14, 0x71, 0x74, 0x19, 0x41, 0x00,
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};
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/* initialize USB */
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rtlsdr_write_reg(dev, USBB, USB_SYSCTL, 0x09, 1);
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rtlsdr_write_reg(dev, USBB, USB_EPA_MAXPKT, 0x0002, 2);
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rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
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/* poweron demod */
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rtlsdr_write_reg(dev, SYSB, DEMOD_CTL_1, 0x22, 1);
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rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0xe8, 1);
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/* reset demod (bit 3, soft_rst) */
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rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
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rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
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/* disable spectrum inversion and adjacent channel rejection */
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rtlsdr_demod_write_reg(dev, 1, 0x15, 0x00, 1);
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rtlsdr_demod_write_reg(dev, 1, 0x16, 0x0000, 2);
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/* set IF-frequency to 0 Hz */
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rtlsdr_demod_write_reg(dev, 1, 0x19, 0x0000, 2);
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/* set FIR coefficients */
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for (i = 0; i < sizeof (fir_coeff); i++)
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rtlsdr_demod_write_reg(dev, 1, 0x1c + i, fir_coeff[i], 1);
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rtlsdr_demod_write_reg(dev, 0, 0x19, 0x25, 1);
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/* init FSM state-holding register */
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rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
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/* disable AGC (en_dagc, bit 0) */
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rtlsdr_demod_write_reg(dev, 1, 0x11, 0x00, 1);
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/* disable PID filter (enable_PID = 0) */
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rtlsdr_demod_write_reg(dev, 0, 0x61, 0x60, 1);
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/* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
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rtlsdr_demod_write_reg(dev, 0, 0x06, 0x80, 1);
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/* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
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* IQ estimation/compensation (en_iq_comp, en_iq_est) */
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rtlsdr_demod_write_reg(dev, 1, 0xb1, 0x1b, 1);
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}
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int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
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{
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int r;
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if (!dev || !dev->tuner)
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return -1;
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rtlsdr_set_i2c_repeater(dev, 1);
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double f = (double) freq;
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f *= 1.0 + dev->tuner->corr / 1e6;
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r = dev->tuner->tune((void *)dev, (int) f);
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rtlsdr_set_i2c_repeater(dev, 0);
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if (!r)
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dev->tuner->freq = freq;
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return r;
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}
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int rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
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{
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if (!dev || !dev->tuner)
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return -1;
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return dev->tuner->freq;
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}
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int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm)
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{
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int r;
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if (!dev || !dev->tuner)
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return -1;
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if (dev->tuner->corr == ppm)
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return -1;
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dev->tuner->corr = ppm;
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/* retune to apply new correction value */
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r = rtlsdr_set_center_freq(dev, dev->tuner->freq);
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return r;
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}
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int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
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{
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if (!dev || !dev->tuner)
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return -1;
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return dev->tuner->corr;
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}
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int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain)
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{
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int r;
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if (!dev || !dev->tuner)
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return -1;
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r = dev->tuner->set_gain((void *)dev, gain);
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if (!r)
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dev->tuner->gain = gain;
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return r;
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}
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int rtlsdr_get_tuner_gain(rtlsdr_dev_t *dev)
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{
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if (!dev || !dev->tuner)
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return -1;
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return dev->tuner->gain;
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}
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int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
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{
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uint16_t tmp;
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uint32_t rsamp_ratio;
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double real_rate;
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if (!dev)
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return -1;
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/* check for the maximum rate the resampler supports */
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if (samp_rate > MAX_SAMP_RATE)
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samp_rate = MAX_SAMP_RATE;
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rsamp_ratio = (CRYSTAL_FREQ * pow(2, 22)) / samp_rate;
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rsamp_ratio &= ~3;
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real_rate = (CRYSTAL_FREQ * pow(2, 22)) / rsamp_ratio;
|
|
fprintf(stderr, "Setting sample rate: %.3f Hz\n", real_rate);
|
|
|
|
if (dev->tuner)
|
|
dev->tuner->set_bw((void *)dev, real_rate);
|
|
|
|
dev->rate = samp_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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_get_sample_rate(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
return dev->rate;
|
|
}
|
|
|
|
rtlsdr_device_t *find_known_device(uint16_t vid, uint16_t pid)
|
|
{
|
|
int i;
|
|
rtlsdr_device_t *device = NULL;
|
|
|
|
for (i = 0; i < sizeof(devices)/sizeof(rtlsdr_device_t); i++ ) {
|
|
if (devices[i].vid == vid && devices[i].pid == pid) {
|
|
device = &devices[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
return device;
|
|
}
|
|
|
|
uint32_t rtlsdr_get_device_count(void)
|
|
{
|
|
int i;
|
|
libusb_device **list;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
|
|
if (!libusb_inited)
|
|
libusb_init(NULL);
|
|
|
|
ssize_t cnt = libusb_get_device_list(NULL, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
if (find_known_device(dd.idVendor, dd.idProduct))
|
|
device_count++;
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
if (!libusb_inited)
|
|
libusb_exit(NULL);
|
|
|
|
return device_count;
|
|
}
|
|
|
|
const char *rtlsdr_get_device_name(uint32_t index)
|
|
{
|
|
int i;
|
|
libusb_device **list;
|
|
struct libusb_device_descriptor dd;
|
|
rtlsdr_device_t *device = NULL;
|
|
uint32_t device_count = 0;
|
|
|
|
if (!libusb_inited)
|
|
libusb_init(NULL);
|
|
|
|
ssize_t cnt = libusb_get_device_list(NULL, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
device = find_known_device(dd.idVendor, dd.idProduct);
|
|
|
|
if (device) {
|
|
device_count++;
|
|
|
|
if (index == device_count - 1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
if (!libusb_inited)
|
|
libusb_exit(NULL);
|
|
|
|
if (device)
|
|
return device->name;
|
|
else
|
|
return "";
|
|
}
|
|
|
|
/* TODO: put those defines in the tuner header once the drivers are added */
|
|
|
|
#define FC2580_I2C_ADDR 0xac
|
|
#define FC2580_CHECK_ADDR 0x01
|
|
#define FC2580_CHECK_VAL 0x56
|
|
|
|
rtlsdr_dev_t *rtlsdr_open(int index)
|
|
{
|
|
int r;
|
|
int i;
|
|
libusb_device **list;
|
|
rtlsdr_dev_t * dev = NULL;
|
|
libusb_device *device = NULL;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
uint8_t reg;
|
|
|
|
dev = malloc(sizeof(rtlsdr_dev_t));
|
|
memset(dev, 0, sizeof(rtlsdr_dev_t));
|
|
|
|
if (1 == ++opened_devices) {
|
|
if (!libusb_inited) {
|
|
libusb_init(NULL);
|
|
libusb_inited = 1;
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
if (find_known_device(dd.idVendor, dd.idProduct)) {
|
|
device_count++;
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
/* Probe tuners */
|
|
rtlsdr_set_i2c_repeater(dev, 1);
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, E4K_I2C_ADDR, E4K_CHECK_ADDR);
|
|
if (reg == E4K_CHECK_VAL) {
|
|
fprintf(stderr, "Found Elonics E4000 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_E4000];
|
|
goto found;
|
|
}
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC0013_I2C_ADDR, FC0013_CHECK_ADDR);
|
|
if (reg == FC0013_CHECK_VAL) {
|
|
fprintf(stderr, "Found Fitipower FC0013 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_FC0013];
|
|
goto found;
|
|
}
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC2580_I2C_ADDR, FC2580_CHECK_ADDR);
|
|
if ((reg & 0x7f) == FC2580_CHECK_VAL) {
|
|
fprintf(stderr, "Found FCI 2580 tuner\n");
|
|
//dev->tuner = &tuners[RTLSDR_TUNER_FC2580];
|
|
// TODO: set GPIO5 low
|
|
goto found;
|
|
}
|
|
|
|
/* initialise GPIOs (only needed for the FC0012 so far */
|
|
rtlsdr_set_gpio_output(dev, 5);
|
|
|
|
/* reset FC0012 before probing */
|
|
rtlsdr_set_gpio_bit(dev, 5, 1);
|
|
rtlsdr_set_gpio_bit(dev, 5, 0);
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC0012_I2C_ADDR, FC0012_CHECK_ADDR);
|
|
if (reg == FC0012_CHECK_VAL) {
|
|
fprintf(stderr, "Found Fitipower FC0012 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_FC0012];
|
|
goto found;
|
|
}
|
|
|
|
found:
|
|
if (dev->tuner)
|
|
r =dev->tuner->init(dev);
|
|
|
|
rtlsdr_set_i2c_repeater(dev, 0);
|
|
return dev;
|
|
err:
|
|
return NULL;
|
|
}
|
|
|
|
int rtlsdr_close(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
libusb_release_interface(dev->devh, 0);
|
|
libusb_close(dev->devh);
|
|
free(dev);
|
|
|
|
if (0 == --opened_devices) {
|
|
if (libusb_inited) {
|
|
libusb_exit(NULL);
|
|
libusb_inited = 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_reset_buffer(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
|
|
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x0000, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
return libusb_bulk_transfer(dev->devh, 0x81, buf, len, n_read, 3000);
|
|
}
|
|
#if 0
|
|
typedef void(*rtlsdr_async_read_cb_t)(const char *buf, uint32_t len, void *ctx);
|
|
|
|
int rtlsdr_async_loop(rtlsdr_dev_t *dev, rtlsdr_async_read_cb_t cb, void *ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|