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pifunk.c
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pifunk.c
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/* PiFunk (C) 2018
->get project:
git clone https://github.com/silicator/pifunk
->instructions:
You will need alsa libary for this:
sudo apt-get install libsndfile-dev
cd PiFunk // goto path
gcc -lm -g -std=c99 -lsndfile pifunk.c -o pifunk -pifunk.o
make clean
make
make install
// compile & run with admin/root permissions!! lm flag for math lib obligatory, -g for debugger
sudo pifunk sound.wav 100.0000 22050 fm callsign
-> real gpio hardware can't be simulated by c or py code! must be executed and compiled on linux
virtual maschine possible with qemu
or alternative with everpad: nor sure about this, rather not using it
wget -o -http://beta.etherpad.org/p/pihackfm/export/txt >/dev/null | gcc -lm -std=c99 -g -x c - && ./a.out sound.wav
gcc 5.4.1 compiler + gdb 7.11.1 debugger (online & local)
g++ 5.4.1 c++11 (or 14)
trying on rabian strech incl. desktop v4.14
!!!!!!! needs more testing on real pi !!!!!
-----Disclaimer-----
Rewritten for own purposes!
no guarantee, waranty for anything! Usage at own risk!
you should ground your antenna, eventually diode or 10uF-caps
usage of dummyloads 50 ohm @ 4 watts (S 0-level), (max 100) possible and compare signals with swr/pwr-meter!
do not shortcut or do overstress it bigger than 3.3V! may harm damage-> no warranty
Access on ARM-System !!! Running Linux, mostly on Raspberry Pi (me B+ rev.2)
used python 2.7.x & 3.6.x on orig. Raspian
don't forget to apt-get upgrade and update
1) Pi-FM version - freqency modulation direction left/right ← , →
2) Pi-AM version - amplitude modulation direction up/down ↑ , ↓
--> 700 MHz (max) system clock of the pi -> pls use heatsink (if you want with fan)
todo:
pointer & adress corrections
make compatible py/shell scripts for debugg/install/run with args
playlist & wave/mp3 + microphone (usb)
github stuff
name & license stuff
*/
//std includes
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h> // for c99
#include <stdarg.h>
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>
// functionality includes
#include <iso646.h> //c95 - backcompatible
#include <time.h>
#include <float.h>
#include <locale.h>
#include <errno.h>
#include <ctype.h>
#include <wchar.h>
#include <wctype.h>
#include <fcntl.h>
#include <malloc.h>
#include <dirent.h>
#include <signal.h>
#include <assert.h>
#include <setjmp.h>
#include <limits.h>
#include <termios.h>
#include <pthread.h>
#include <inttypes.h>
#include <math.h>
#include <tgmath.h>
#include <complex.h>
#include <features.h>
#include <fenv.h>
#include <grp.h>
#include <pwd.h>
// on posix linux
#include <sys/cdefs.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>#
// ip host socket
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <net/if.h>
//-- c11
#include <stdalign.h>
#include <stdnoreturn.h>
#include <stdatomic.h>
#include <uchar.h>
//for c++14/17
/*
#include <iostream>
#include <threads.h>
using namespace std;
*/
// windows (10) if needed for maybe rpi3
/*
#include <windows.h>
#include <win.h>
#include <windef.h>
#include <winnt.h>
#include <winbase.h>
#include <conio.h> // dos header
*/
// broadcom arm processor for mapping phys. adresses
#include "bcm2835/src/bcm2835.h"
//GPIO includes´
//#include "RPI.GPIO/source/c_gpio.h"
#include "RPI.GPIO/source/event_gpio.h"
//#include "RPI.GPIO/source/py_pwm.h"
#include "RPI.GPIO/source/soft_pwm.h"
#include "RPI.GPIO/source/common.h"
//#include "RPI.GPIO/source/constants.h"
#include "RPI.GPIO/source/cpuinfo.h"
// see http://www.mega-nerd.com/libsndfile/api.html for API needed for am -> ALSA sound
#include "sndfile.h" // has problems with @typedef sf_count somehow -> set as int
//extra libary https://github.com/libusb/libusb for usb soundcarts for mic and alsa
#include "libusb/libusb.h"
//python stuff, maybe wrapper too??
//---------------------------------------------------------------//
#define VERSION "0.1.6.5 a"
#define VERSION_MAJOR 0
#define VERSION_MINOR 1
#define VERSION_BUILD 6
#define VERSION_STATUS a
//---- PI specific stuff
#define IN 0
#define OUT 1
#define FALSE 0
#define TRUE 1
/*
predefine if needed when not using bcm header
#define LOW 0
#define HIGH 1
*/
//-------buffers
#define PAGE_SIZE (4*1024)
#define BLOCK_SIZE (4*1024)
#define BUFFER_LEN (8*1024)
#define BUFFERINSTRUCTIONS (65536) // [1024];
//#define sleep [1000]
//#define usleep [1000]
// --------I-O access via GPIO
volatile unsigned *gpio;
volatile unsigned *allof7e;
// GPIO setup macros: Always use INP_GPIO(x) before using OUT_GPIO(x) or SET_GPIO_ALT(x,y)
#define PIN17 RPI_GPIO_P1_11 // which is GPIO pin 17 for led
#define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))
#define OUT_GPIO(g) *(gpio+((g)/10)) |= (1<<(((g)%10)*3))
#define SET_GPIO_ALT(g,a) *(gpio+(((g)/10))) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))
#define GPIO_SET *(gpio+7) // setsbits which are 1 ignores bits which are 0
#define GPIO_CLR *(gpio+10) // clears bits which are 1 ignores bits which are 0
#define GPIO_GET *(gpio+13) // sets bits which are 1 ignores bits which are 0
#define length (0x01000000)
#define base (0x20000000) //base=GPIO offset
#define ADR (0x7E000000)
#define CM_GP0CTL (0x7E101070) //p.107
#define GPFSEL0 (0x7E200000) //p.90
#define CM_GP0DIV (0x7E101074) //p.108
#define CLKBASE (0x7E101000)
#define DMABASE (0x7E007000)
#define PWMBASE (0x7E20C000) // PWM controller
#define BCM2836_PERI_BASE (0x3F000000) // register physical address
#define GPIO_BASE (BCM2836_PERI_BASE + base)
#define PWMCLK_DIV (0x5A002800) // PWMCLK_DIV
#define PWMCLK_CNTL (0x5A000016) //PWMCLK_CNTL
#define ACCESS(base) (volatile int*)(base+(volatile int)allof7e-ADR)
#define SETBIT(base, bit) ACCESS(base) || 1<<bit // |=
#define CLRBIT(base, bit) ACCESS(base) && ~(1<<bit) // &=
//possibility to give argv 0-4 an specific adress or pointer
//Adresses-> at least on my system-tests
#define argc_adr (0x7FFFFFFFEB0C)
#define Name_adr (0x7FFFFFFEC08)
#define File_adr (0x7FFFFFFFEC10)
#define Freq_adr (0x7FFFFFFFEC18)
#define Samplerate_adr (0x7FFFFFFFEC20)
#define Modulation_adr (0x7FFFFFFFEC28)
#define callsign_adr (0x6052C0)
#define callsign2_adr (0x7FFFFFFFEAEF)
#define callsign3_adr (0x7FFFFFFFEAE8)
//Pointers->
#define argc_ptr (0x5)
#define Name_ptr (0x2F)
#define File_ptr (0x73)
#define Freq_ptr (0x31) //$ means is in RDS data
#define Samplerate_ptr (0x32) //$ means its in RDS data
#define Modulation_ptr (0x66) //$ means its in RDS data
#define callsign_ptr (0x6D)
#define CurBlock (0x04)
#define DMAref (0x7F) //pwm base reference or sth like that?
//--------------------------------------------------//
//mathematical stuff
#define ln(x) log(x)/log(2.718281828459045235f)
#define PI 3.14159265
//pi variables: -> need to be activated and pulled up with python-script, or automaticly by system
int mem_fd;
char *gpio_mem, *gpio_map;
char *spi0_mem, *spi0_map;
//-----------------------------------------
// programm Arguments
// custom programm-name. system default is the filename itself!
char *description = "(experimental)";
char *filename;
float freq;
int samplerate;
// samples max 10 kHz resolution for am / 14.5 kHz FM radio can be recorded with only a little quality loss.
int channels ;
char *mod;
char *fm = "fm";
char *am = "am";
char *callsign;
float volume = 1.0f;
int channelmode;
int channelnumbercb;
int channelnumberpmr;
//--network sockets for later
// here custom port via tcp-ip evtl. udp
socklen_t addressLength;
struct sockaddr_in localAddress;
struct client_addr.sin_addr;
struct local.sin_addr;
// programm variables
time_t rawtime;
char buffer [80];
char data [1024];
int i;
int k;
float x;
// we generate complex I-Q samples
float data [2*BUFFER_LEN];
float data_filtered [2*BUFFER_LEN];
float FactAmplitude = 2.0; //maybe here ampmodulator type input?
// log Modulation
float A = 87.7f; // compression parameter, stauchung
// fm vars
FILE infiles;
FILE outfiles;
int fp = STDIN_FILENO;
int filebit;
int readBytes;
float datanew, dataold = 0;
SF_INFO sfinfo;
SNDFILE *infile, *outfile;
char *infilename, *outfilename;
float ampf;
float factorizer;
float sampler;
int readcount, nb_samples;
int Excursion = 6000;
// audio control
//volume in dB 0db = unity gain, no attenuation, full amplitude signal
//-20db = 10x attenuation, significantly more quiet
float volumeLevelDb = -6.f; //cut amplitude in half
float volbuffer [SAMPLES_PER_BUFFER];
const float VOLUME_REFERENCE = 1.f;
const float volumeMultiplier = (VOLUME_REFERENCE * pow(10, (volumeLevelDb / 20.f);
// instructor for access
unsigned long frameinfo;
int FileFreqTiming;
int instrs [BUFFERINSTRUCTIONS]; // [1024];
int bufPtr = 0;
int instrCnt = 0;
int constPage;
int instrPage;
//--------------------------------------------------
// Structs
struct tm *info;
struct PageInfo // should use here bcm intern funcs-> repair
{
void *p; // physical address BCM2836_PERI_BASE (0x3F000000)
void *v; // virtual address
int instrPage;
int constPage;
int instrs [BUFFERINSTRUCTIONS]; // [1024];
};
struct GPCTL
{
char SRC : 4;
char ENAB : 1;
char KILL : 1;
char : 1; // what is the blank char?
char BUSY : 1;
char FLIP : 1;
char MASH : 2;
unsigned int : 13;
char PASSWD : 8;
};
struct CB
{
volatile unsigned int TI;
volatile unsigned int SOURCE_AD;
volatile unsigned int DEST_AD;
volatile unsigned int TXFR_LEN;
volatile unsigned int STRIDE;
volatile unsigned int NEXTCONBK;
volatile unsigned int RES1;
volatile unsigned int RES2;
};
struct DMAregs
{
volatile unsigned int CS;
volatile unsigned int CONBLK_AD;
volatile unsigned int TI;
volatile unsigned int SOURCE_AD;
volatile unsigned int DEST_AD;
volatile unsigned int TXFR_LEN;
volatile unsigned int STRIDE;
volatile unsigned int NEXTCONBK;
volatile unsigned int DEBUG;
};
int audiovol ()
{
for (int i = 0; i < SAMPLES_PER_BUFFER; ++i)
{
volbuffer [i] *= volumeMultiplier;
printf ("\n i: %d , volbuffer %f , volumeMultiplier %f \n", i, volbuffer [i], volumeMultiplier);
}
return 0
}
//--------------LED stuff
//controlling via py possible but c stuff can be useful too by bcm funcs!
//turn on LED (with 100 kOhm pullup resistor while transmitting
// Blinks on RPi Plug P1 pin 11
int ledactive ()
{
//check if transmitting
while(!playWav());
{
cm2835_gpio_write (PIN17, LOW);
printf ("LED OFF - No Transmission ");
return 0;
}
retun 0;
}
int led ()
{
// simulation of gpio for debug
// bcm2835_set_debug (1);
if (!bcm2835_init ())
{
printf ("\nBCM 2835 init failed! \n");
return 0;
}
else if (1)
{
// Set the pin to be an outputannels
bcm2835_gpio_fsel (PIN17, BCM2835_GPIO_FSEL_OUTP);
printf ("\nBCM 2835 init done and PIN 4 activated \n");
// LED is active during transmission
while (playWav())// (ledactive != 0)
{
// Turn it on
bcm2835_gpio_write (PIN17, HIGH);
printf ("LED ON - Transmission... ");
// wait a bit
bcm2835_delay (500);
}
}
else // if no trans than turn it off
{
cm2835_gpio_write (PIN17, LOW);
printf ("LED OFF - No Transmission ");
}
bcm2835_close();
printf ("\nBCM 2835 closing \n");
return 0;
}
// basic function then specified one after another
int infos () //Warnings and infos
{
printf ("\nWelcome to the Pi-Funk! v%s %s for Raspian ARM \n\a", VERSION, *description);
printf ("Radio works with *.wav-file with 16-bit @ 22050 [Hz] Mono / 1-700.00000 MHz Frequency\nUse '. dot' as decimal-comma seperator! \n");
printf("Pi\033[1;4;35mFunk\033[0m colour test \n"); //35 for Magenta, 33 red
printf ("Pi oparates with square-waves (²/^2) PWM on GPIO 4 (Pin 7 @ ~500 mA & max. 3.3 V). \nUse power supply with enough specs only! \n=> Use Low-/Highpassfilters and/or ~10 uF-cap, isolators orresistors if needed! \nYou can smooth it out with 1:1 baloon. Do NOT shortcut if dummyload is used! \nCheck laws of your country! \n");
printf ("HELP: Use Parameters to run: [filename] [freq] [samplerate] [mod (fm/am)] or [menu] or [help]! \n");
printf ("for testing (default setting) run: sudo sound.wav 100.0000 22050 fm callsign\n");
// colour text test: 1 for "bright" / 4 for "underlined" and \0XX ansi colorcode
printf ("\nclient ip+port: %s:%d \n", inet_ntoa (client_addr.sin_addr), (int) ntohs (client_addr.sin_port));
printf ("local ip+port: %s:%d \n", inet_ntoa (local.sin_addr), ntohs (local.sin_port));
return 0;
}
int timer ()
{
time (&rawtime);
info = localtime (&rawtime);
printf ("Current local time and date: %s \n", asctime (info));
return 0;
}
char filenamepath ()
{
printf ("\nPlease enter the full path including name of the *.wav-file you want to use: \n");
scanf ("%s", filename);
if (filename == NULL)
{
printf ("%s File not found! \n", filename);
return -1;
}
else
{
printf ("Trying to play default sound.wav ... \n");
*filename = open ("sound.wav", "r");
return filename;
}
return filename;
}
int freqselect () // gets freq by typing in
{
printf ("\nYou selected 1 for Frequency-Mode\n");
printf ("Type in Frequency (1-700.00000 MHz): ");
scanf ("%f", freq);
printf ("You chose: %f MHz \n", freq);
return freq;
}
int channelselect ()
{
printf ("You selected 1 for Channel-Mode\n");
printf ("Choose your Type [1] PMR // [2] CB // [3] Exit : ");
scanf ("%d", &channelmode);
switch (channelmode) // from here collecting infos and run it step by step, same for freq-mode
{
case 1: printf ("PMR CHAN-MODE in FM \n");
int channelmodepmr (); // gets freq from pmr list
filenamepath ();
printf ("\nChecking volume... \n");
audiovol ();
int modulationfm (int argc, char **argv);
break;
case 2: printf ("CB CHAN-MODE SELECT \n");
int channelmodecb (); // gets freq for chan
filenamepath (); //gets file
audiovol ();
int modulationselect (); //selects modulation
break;
case 3: printf ("\nExiting... \n");
exit (-1);
break;
//default: printf ("\nDefault: Returning to Menu... \n"); GetUserInput (); break;
}
return channelmode;
}
//--------------------------------------------------
// Channelmode
//PMR
int channelmodepmr ()
{
printf ("\nChoose PMR-Channel 0-17 (18 to exit): ");
scanf ("%d", &channelnumberpmr);
switch (channelnumberpmr)
{
//---- Analog & digital
case 0: freq=446.00625; printf ("\nDUMMY all-chan: Chan 0-> default Chan 1 %f ", freq); break; // Scan all Chan till active , now chan1
case 1: freq=446.00625; break; //Standard
case 2: freq=446.01875; break; //Geocaching
case 3: freq=446.03125; break; // random
case 4: freq=446.04375; break; //at 3-chan-PMR-devices its ch. 2
case 5: freq=446.05625; break; //Contest
case 6: freq=446.06875; break; //Events
case 7: freq=446.08125; break; //at 3-chanl-PMR-devices it's ch. 3
case 8: freq=446.09375; break; //random talk stuff
//---------------------------Digital only
// dpmr digital new since 28.09.2016
// extra 8 chan
// 12.5 kHz steps too
case 9: freq=446.10312; break; // 6.25 kHz steps
case 10: freq=446.10625; break;
case 11: freq=446.11875; break;
case 12: freq=446.13125; break;
case 13: freq=446.14375; break;
case 14: freq=446.15625; break;
case 15: freq=446.16875; break;
case 16: freq=446.18125; break;
case 17: freq=446.19375; break;
case 18: channelselect (); break;
//default: freq=446.00625; printf ("\nDefault chan = 1 %f \n", freq); break;
}
return freq;
}
// CB
int channelmodecb ()
{
printf ("\nChoose CB-Channel 0-80 (81 to exit): ");
scanf ("%d", &channelnumbercb);
switch (channelnumbercb)
{
case 0: freq=27.0450; printf ("\nSpecial freq for digital %f \n", freq); break;
case 1: freq=26.9650; break; //empfohlener Anrufkanal (FM)
case 2: freq=26.9750; break; //inoffizieller Berg-DX-Kanal (FM)
case 3: freq=26.9850; break;
case 4: freq=27.0050; break; //empfohlener Anrufkanal (AM)/Anrufkanal Feststationen (AM)
case 5: freq=27.0150; break; //Kanal wird von italienischen Fernfahrern in Deutschland und Italien benutzt.
case 6: freq=27.0250; break; //Datenkanal (D)
case 7: freq=27.0350; break; //Datenkanal (D)
case 8: freq=27.0550; break;
case 9: freq=27.0650; break; //Fernfahrerkanal (AM)/weltweiter Notrufkanal EMG
case 10: freq=27.0750; break; //Antennen-abgleich - halbe Channel-Anzahl!! ansonsten Chan 20 oder 40
/*
# Bei genauerer Betrachtung obiger Tabelle fallen einige Stellen auf,
# an denen sich Nachbarkanaele nicht um 10 kHz, sondern um 20 kHz unterscheiden.
# Die dazwischen versteckten Kanaele werden ueblicherweise folgenderweise bezeichnet:
# Diese Kanaele sind in den meisten Laendern nicht fuer CB-Funk zugelassen.
# Allerdings werden sie in einigen Laendern, darunter auch Deutschland[3], fuer andere Zwecke
# wie z. B. Funkfernsteuerungen, Babyphones, kabellose Tastaturen und Maeuse verwendet
*/
case 11: freq=27.0850; break; //freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland
case 1111: freq=27.0950; break; //Eurobalise-Energieversorgung
case 12: freq=27.1050; break;
case 13: freq=27.1150; break;
case 14: freq=27.1250; break; //oft verwendet fuer Spielzeug-Fernsteuerungen (mittels Selektivton)
case 15: freq=27.1350; break; //inoffizieller Anrufkanal SSB (USB)
case 1515: freq=27.1450; break;
case 16: freq=27.1550; break; //Funkverkehr mit und zwischen Wasserfahrzeugen
case 17: freq=27.1650; break; //Kanal wird von daenischen Schwertransportfahrern in Deutschland und Daenemark benutzt
case 18: freq=27.1750; break;
case 19: freq=27.1850; break; //empfohlener Fernfahrerkanal (FM)/oft von Walkie-Talkies genutzt/teilweise auch als Notrufkanal angegeben/auch von Babyfonen genutzt
case 1919: freq=27.1950; break;
case 20: freq=27.2050; break; //zum Antennenabgleich genutzte Mitte bei 40-Kanal-Geraeten,
//#wird in oesterreich sehr oft fuer Schwertransportfahrten benutzt
//## 40 chan devices
case 21: freq=27.2150; break; //tuerkischer Anrufkanal in Deutschland und Europa (FM)
case 22: freq=27.2250; break; //oft von Walkie-Talkies genutzt, auch von Babyfonen genutzt, wird auch als Anrufkanal fuer rumaenische Fernlastfahrer verwendet
case 23: freq=27.2550, break; //Die Kanaele 23, 24, 25 sind sog. Dreher, sie folgen nicht dem aufsteigenden 10-kHz-Raster
case 24: freq=27.2350; break; //Datenkanal (D)
case 25: freq=27.2450; break; //Datenkanal (D), USB ROS Intern
case 26: freq=27.2650; break;
case 27: freq=27.2750; break;
case 28: freq=27.2850; break; //Kanal wird von polnischen Fernfahrern in Deutschland benutzt, Anrufkanal in Polen, wobei allgemein die CB-Kanalfrequenz in Polen um 5 kHz niedriger ist
case 29: freq=27.2950; break; //Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ber eine Internetverbindung in Deutschland
case 30: freq=27.3050; break; //inoffizieller DX-Kanal (FM), Anrufkanal fuer Funker aus dem ehemaligen Jugoslawien
case 31: freq=27.3150; break; //inoffizieller DX-Kanal (FM)
case 32: freq=27.3250; break;
case 33: freq=27.3350; break;
case 34: freq=27.3450; break; //freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland
case 35: freq=27.3550; break; //oeffentlicher Kanal
case 36: freq=27.3650; break; //Datenkanal USB ROS international
case 37: freq=27.3750; break; //Gateway-Kanal oesterreich, FM
case 38: freq=27.3850; break; //inoffizieller internationaler DX-Kanal (LSB)
case 39: freq=27.3950; break; //Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland
case 40: freq=27.4050; break; //ab Maerz 2016 freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete
//ueber eine Internetverbindung in Deutschland (FM/AM/SSB in D)
/* 80 chan devices
Auf den nationalen Zusatzkanaelen 41 bis 80 ist nur die Modulationsart FM erlaubt
Nachfolgend sind die Frequenzen der nationalen Zusatzkanaele, die im CB-Funk benutzt werden duerfen, aufgelistet:
*/
case 41: freq=27.5650; break; //Ab Maerz 2016 Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland (FM),inoffizieller DX-Kanal (FM)
case 42: freq=27.5750; break; //inoffizieller DX-Kanal (FM)
case 43: freq=27.5850; break;
case 44: freq=27.5950; break;
case 45: freq=27.6050; break;
case 46: freq=27.6150; break;
case 47: freq=27.6250; break;
case 48: freq=27.6350; break;
case 49: freq=27.6450; break;
case 50: freq=27.6550; break;
case 51: freq=27.6650; break;
case 52: freq=27.6750; break; //Datenkanal (D)(FM)
case 53: freq=27.6850; break; //Datenkanal (D)(FM)
case 54: freq=27.6950; break;
case 55: freq=27.7050; break;
case 56: freq=27.7150; break;
case 57: freq=27.7250; break;
case 58: freq=27.7350; break;
case 59: freq=27.7450; break;
case 60: freq=27.7550; break;
case 61: freq=26.7650; break; //Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland
case 62: freq=26.7750; break;
case 63: freq=26.7850; break;
case 64: freq=26.7950; break;
case 65: freq=26.8050; break;
case 66: freq=26.8150; break;
case 67: freq=26.8250; break;
case 68: freq=26.8350; break;
case 69: freq=26.8450; break;
case 70: freq=26.8550; break;
case 71: freq=26.8650; break; //Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland
case 72: freq=26.8750; break;
case 73: freq=26.8850; break;
case 74: freq=26.8950; break;
case 75: freq=26.9050; break;
case 76: freq=26.9150; break; //Datenkanal (D)(FM)
case 77: freq=26.9250; break; //Datenkanal (D)(FM)
case 78: freq=26.9350; break;
case 79: freq=26.9450; break;
case 80: freq=26.9550; break; //Freigegeben zur Zusammenschaltung mehrerer CB-Funkgeraete ueber eine Internetverbindung in Deutschland */
case 81: exit (-1); break;
//default: freq=26.9650; printf ("\nDefault: CB chan = 1 %f \n", &freq); break;
return freq;
}
return freq;
}
//----------------------------------- Voids
// FM ones
void handSig ()
{
exit (0);
}
void modulate (int m)
{
ACCESS (CM_GP0DIV) == (0x5A << 24) + 0x4D72 + m;
}
void getRealMemPage (void** vAddr, void** pAddr) // should work through bcm header!
{
void* a = valloc (4096);
((int*)a)[0] = 1; // use page to force allocation
mlock (a, 4096); // lock into ram
*vAddr = a; // we know the virtual address now
int fp = open ("/proc/self/pagemap", 'w');
lseek (fp, ((int)a)/4096*8, SEEK_SET);
read (fp, &frameinfo, sizeof (frameinfo));
*pAddr = (void*)((int)(frameinfo*4096));
}
void freeRealMemPage (void** vAddr)
{
munlock (vAddr, 4096); // unlock ram
free (vAddr); // free the ram
}
void setupfm ()
{
printf ("\nSetting up FM... \n");
// open /dev/mem
if ((mem_fd = open ("/dev/mem", O_RDWR|O_SYNC) ) < 0)
{
printf ("\nCan't open /dev/mem! \n"); // via bcm possible
exit (-1);
}
allof7e = (unsigned*)mmap(
NULL,
0x01000000, //length
PROT_READ|PROT_WRITE,
MAP_SHARED,
mem_fd,
0x20000000); //base
if ((int)allof7e == -1) exit (-1);
SETBIT(GPFSEL0, 14);
CLRBIT(GPFSEL0, 13);
CLRBIT(GPFSEL0, 12);
struct GPCTL setupword = {6, 1, 0, 0, 0, 1,0x5A};
// alternative setupword
//setting cm
ACCESS (CM_GP0CTL) == *((int*)&setupword);
}
///------------------------------------
//relevant for transmitting stuff
void playWav (char *filename, int samplerate)
{
// after getting filename insert then open
lseek (fp, 0L, SEEK_SET);
int sz = lseek (fp, 0L, SEEK_END);
short* data = (short*)malloc (sz);
for (int i = 0; i < 22; i++)
{
read (fp, &data, 2); // read past header (or sz instead on 2 ?)
printf ("\nfor i=0: read fp \n");
}
while (readBytes = read (fp, &data, 1024))
{
float value = data[i]*4*volume; // modulation index (AKA volume) logar. hearing of human
float fmconstant = (samplerate*50.0E-6); // for pre-emphisis filter, 50us time constant
int clocksPerSample = (22050/samplerate*1400.0); // for timing
datanew = ((float)(*data)/32767.0f); //some constant for modulation ??
float sample = datanew + (dataold-datanew)/(1-fmconstant); // fir of 1 + s tau
float dval = sample*15.0; // actual transmitted sample, 15 is bandwidth (about 75 kHz) better 14.5
int intval = (int)(round (dval)); // integer component
float frac = ((dval - (float)intval)/2 + 0.5);
unsigned int fracval = (frac*clocksPerSample);
//problem still with .v & .p endings for struct!!
//time++;
bufPtr++;
//while (ACCESS(DMABASE + 0x04 & ~ 0x7F) == (int)(instrs[bufPtr].p) ); // CurBlock 0x04 of struct PageInfo
//usleep (1000);
// Create DMA command to set clock controller to output FM signal for PWM "LOW" time
//(struct CB*)(instrs[bufPtr].v))->SOURCE_AD = ((int)constPage.p + 2048 + intval*4-4);
//bufPtr++;
//while (ACCESS(DMABASE + 0x04) == (int)(instrs[bufPtr].p));
//usleep (1000);
// Create DMA command to delay using serializer module for suitable time
// ((struct CB*)(instrs[bufPtr].v))->TXFR_LEN = clocksPerSample-fracval;
bufPtr++;
//while (ACCESS(DMABASE + 0x04) == (int)(instrs[bufPtr].p));
//usleep (1000);
// Create DMA command to set clock controller to output FM signal for PWM "HIGH" time.
//((struct CB*)(instrs[bufPtr].v))->SOURCE_AD = ((int)constPage.p + 2048 + intval*4+4);
//while (ACCESS(DMABASE + 0x04) == (int)(instrs[bufPtr].p));
//usleep (1000);
// Create DMA command for more delay.
//((struct CB*)(instrs[bufPtr].v))->TXFR_LEN = fracval;
bufPtr = (bufPtr+1) % (BUFFERINSTRUCTIONS); // [1024] for buffer
dataold = datanew;
//ss->consume (data, readBytes);// ss-> for stereo
}
close (fp);
close (filename);
printf ("\nc´Closing filenames \n");
}
void unSetupDMA ()
{
struct DMAregs* DMA0 = (struct DMAregs*)(ACCESS(DMABASE));
DMA0->CS == 1<<31; // reset dma controller
printf ("SetupDMA done \n");
exit (-1);
}
void setupDMA (float freq)
{
printf ("SetupDMA starting \n");
atexit (unSetupDMA);
signal (SIGINT, handSig);
signal (SIGTERM, handSig);
signal (SIGHUP, handSig);
signal (SIGQUIT, handSig);
// allocate a few pages of ram
//getRealMemPage (&constPage.v, &constPage.p);
int centerFreqDivider = (int)((500.0/freq) * (float)(1<<12) + 0.5);
// make data page contents - it's essientially 1024 different commands for the
// DMA controller to send to the clock module at the correct time
for (int i=0; i<1024; i++)
{
// ((int*)(constPage.v))[i] = (0x5a << 24) + centerFreqDivider - 512 + i;
}
while (instrCnt < 1024) //BUFFERINSTRUCTIONS
{
//getRealMemPage (&instrPage.v, &instrPage.p);
// make copy instructions
//struct CB* instr0 = (struct CB*)instrPage.v;
for (int i=0; i<4096/sizeof(struct CB); i++)
{
/*
instrs[instrCnt].v = (void*)((int)instrPage.v + sizeof(struct CB)*i);
instrs[instrCnt].p = (void*)((int)instrPage.p + sizeof(struct CB)*i);
instr0->SOURCE_AD = (unsigned int)constPage.p + 2048;
instr0->DEST_AD = PWMBASE + 0x18; //fifo
instr0->TXFR_LEN = 4;
instr0->STRIDE = 0;
instr0->NEXTCONBK = (int)instrPage.p + sizeof (struct CB)*(i+1);
// DREQ then PWM then no-wide
instr0->TI = (1<<6) | (5<<16) | (1<<26);
instr0->RES1 = 0;
instr0->RES2 = 0;
if (i%2)
{
instr0->DEST_AD = CM_GP0DIV;
instr0->STRIDE = 4;
instr0->TI = (1<<26) ;
}
if (instrCnt!=0) ((struct CB*)(instrs[instrCnt-1].v))->NEXTCONBK = (int)instrs[instrCnt].p;
instr0++;
*/
instrCnt++;
}
}
//((struct CB*)(instrs[1023].v))->NEXTCONBK = (int)instrs[0].p;
// set up a clock for the base
ACCESS (CLKBASE + 40*4) == (0x5A000026); //PWMCLK_CNTL
//usleep (1000);
ACCESS (CLKBASE + 41*4) == (0x5A002800); //PWMCLK_DIV
ACCESS (CLKBASE + 40*4) == (0x5A000016); //PWMCLK_CNTL
//usleep (1000);
// set up pwm
ACCESS (PWMBASE + 0x0) == 0;
//usleep (1000);
ACCESS (PWMBASE + 0x4) == -1; // status: clear errors
//usleep (1000);
// Use fifo , repeat, serializer, enable ch
ACCESS (PWMBASE + 0x0) == -1 | (1<<13) | (1<<10) | (1<<9) | (1<<8);
//usleep (1000);
ACCESS (PWMBASE + 0x8) == (1<<31) | 0x0707; // DMAC then DMA enable
//activate dma
struct DMAregs* DMA0 = (struct DMAregs*)(ACCESS(DMABASE));
DMA0->CS = 1<<31; // reset
DMA0->CONBLK_AD = 0;
DMA0->TI = 0;
//DMA0->CONBLK_AD = (unsigned int)(instrPage.p);
DMA0->CS = (1<<0)|(255 <<16); // enable bit = 0, clear end flag = 1, prio=19-16
printf ("SetupDMA done \n");
}
// AM ones
void WriteTone (float Frequency, uint32_t Timing)
{
typedef struct
{
float Frequency;
uint32_t WaitForThisSample;
}
samplerf_t;
samplerf_t RfSample;
freq = Frequency;
RfSample.Frequency = Frequency;
RfSample.WaitForThisSample = Timing; //in 100 of nanoseconds
printf ("Freq: %f , Timing: %d \n", RfSample.Frequency, RfSample.WaitForThisSample);
if (write (FileFreqTiming, &RfSample, sizeof (samplerf_t)) != sizeof (samplerf_t))
{
fprintf (stderr, "\nUnable to write sample \n");
}
}
//---------------------//
// main progs
//FM
int modulationfm (int argc, char **argv)
{
printf ("\nPreparing for FM... \n");
if (argc>0)
{
printf ("\nChecking Path... \n");
setupfm (); // gets filename & path or done by filmename() func
printf ("\nSetting up DMA... \n");
setupDMA (argc>2 ? atof (argv[2]):100.00000); // default freq, maybe do input here?
printf ("\nTesting Samplerate... \n");
playWav (argv[1], argc>3 ? atof (argv[3]):22050); // <--- in 22.05 kHz, should be same as AM!!
printf ("\Checking & Setting LED for Transmission \n");
led ();
printf ("\nNow transmitting... \n");
}
else fprintf (stderr, "\nUse Parameters to run: [filename] [freq] [samplerate] [mod (fm/am)] \nWhere wav-file is 16-bit @ 22050 Hz Mono.\nSet wavfile to '-' to use stdin.\nFrequency is between 1-700.0000 [MHz] (default 100.0000)\nYou can play an empty file to transmit silence. \n");
return modulationfm;
}
//AM --- not yet adapted, needs revision for freq
int modulationam (int argc, char **argv)
{
/*
{IQ (FileInput is a Mono Wav contains I on left Channel, Q on right channel)}
{IQFLOAT (FileInput is a Raw float interlaced I,Q)}
{RF (FileInput is a (float) Frequency,Time in nanoseconds}
{RFA (FileInput is a (float) Frequency, (int) Time in nanoseconds, (float) Amplitude}
{VFO (constant frequency)}
*/
nb_samples = (readcount/channels);
printf ("\n nb_samples: %f \n", nb_samples);
printf ("Compression prameter A: %f \n", A); // was defined as global var above
if (argc>=4)
{
printf ("filefreq timing opener test");
FileFreqTiming = open (outfilename, O_CREAT | O_WRONLY | O_TRUNC, 0644); // O_RDWR
}
else
{
outfilename = (char *) malloc (128);// not sure about that in else or what it does
sprintf (outfilename, "%s", "out.ft");
}
//-------