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#include <unistd.h>
#include <librpitx/librpitx.h>
#include "stdio.h"
#include <cstring>
#include <signal.h>
#include <stdlib.h>
#include <sys/shm.h> //Used for shared memory
// =============================================================================================
// ----- SHARED MEMORY STRUCTURE -----
// All commands sent by a partner program towards sendiq
// Operation tips
// 1-Partner program creates a shared memory block with a given arbitrary token id
// (any integer non-zero integer number).
// 2-sendiq is started with the -m {token} argument, without it no shared memory commands
// are honored.
// 3-Partner program willing to alter the operation of sendiq place the
// appropriate commnand plus optional associated data and/or common_data
// if needed (see table below).
// 4-Partner program set updated=true.
// 5-sendiq checks periodically for condition updated==true.
// 6-if detected updated==true at step -5- the command is evaluated and executed.
// 7-sendiq set updated=false.
// 8-Partner program must refrain to send any command while the condition updated==true is on
//
// Table
// ---------------------------------------------------------------------------
// Command Meaning data common_data
// 1111 Switch to I/Q mode N/A N/A
// 2222 Switch to Freq & A mode N/A N/A
// 3333 Set drive level Drive level {0..7} N/A
// 4444 Change Frequency Frequency in Hz N/A
// ---------------------------------------------------------------------------
//
// Note: with current level if shared memory is enabled the data incoming thru standar input
// or file is expected to be in float format. Other data formats aren't supported together with
// commands, for them sendiq will work but no commands will be honored.
//
// *--- Memory structure
struct shared_memory_struct {
bool updated;
int command;
float data;
char common_data[1024];
};
bool running=true;
bool fdds=false; //operate as a DDS
float drivedds=0.1; //drive level
#define PROGRAM_VERSION "0.2"
// *----- Shared memory Variables
void *pshared = (void *)0; //pointer to IPC structure
struct shared_memory_struct *sharedmem; //Actual shared memory area
int sharedmem_id; //token is an unique ID for shared memory
int sharedmem_token=0; //key ID, =0 means no shared memory
// *----- End of shared memory definitions
void print_usage(void)
{
fprintf(stderr,\
"\nsendiq -%s\n\
Usage:\nsendiq [-i File Input][-s Samplerate][-l] [-f Frequency] [-h Harmonic number] \n\
-i path to File Input \n\
-s SampleRate 10000-250000 \n\
-f float central frequency Hz(50 kHz to 1500 MHz),\n\
-m int shared memory token,\n\
-d dds mode,\n\
-p power level (0.00 to 7.00),\n\
-l loop mode for file input\n\
-h Use harmonic number n\n\
-t IQ type (i16 default) {i16,u8,float,double}\n\
-? help (this help).\n\
\n",\
PROGRAM_VERSION);
} /* end function print_usage */
static void
terminate(int num)
{
running=false;
fprintf(stderr,"Caught signal - Terminating %x\n",num);
}
#define MAX_SAMPLERATE 200000
int main(int argc, char* argv[])
{
int a;
int anyargs = 1;
float SetFrequency=434e6;
float SampleRate=48000;
bool loop_mode_flag=false;
char* FileName=NULL;
int Harmonic=1;
enum {typeiq_i16,typeiq_u8,typeiq_float,typeiq_double};
int InputType=typeiq_i16;
int Decimation=1;
while(1)
{
a = getopt(argc, argv, "i:f:s:m:p:h:ldt:");
if(a == -1)
{
if(anyargs) break;
else a='h'; //print usage and exit
}
anyargs = 1;
switch(a)
{
case 'i': // File name
FileName = optarg;
break;
case 'd': // dds mode
fdds=true;
break;
case 'p': // driver level (power)
drivedds=atof(optarg);
if (drivedds<0.0) {drivedds=0.0;}
if (drivedds>7.0) {drivedds=7.0;}
break;
case 'f': // Frequency
SetFrequency = atof(optarg);
break;
case 'm': // Shared memory token
sharedmem_token = atoi(optarg);
InputType=typeiq_float; //if using shared memory force float pipe
break;
case 's': // SampleRate (Only needeed in IQ mode)
SampleRate = atoi(optarg);
if(SampleRate>MAX_SAMPLERATE)
{
for(int i=2;i<12;i++) //Max 10 times samplerate
{
if(SampleRate/i<MAX_SAMPLERATE)
{
SampleRate=SampleRate/i;
Decimation=i;
break;
}
}
if(Decimation==1)
{
fprintf(stderr,"SampleRate too high : >%d sample/s",10*MAX_SAMPLERATE);
exit(1);
}
else
{
fprintf(stderr,"Warning samplerate too high, decimation by %d will be performed",Decimation);
}
};
break;
case 'h': // help
Harmonic=atoi(optarg);
break;
case 'l': // loop mode
loop_mode_flag = true;
break;
case 't': // inout type
if(strcmp(optarg,"i16")==0) InputType=typeiq_i16;
if(strcmp(optarg,"u8")==0) InputType=typeiq_u8;
if(strcmp(optarg,"float")==0) InputType=typeiq_float;
if(strcmp(optarg,"double")==0) InputType=typeiq_double;
break;
case -1:
break;
case '?':
if (isprint(optopt) )
{
fprintf(stderr, "sendiq: unknown option `-%c'.\n", optopt);
}
else
{
fprintf(stderr, "sendiq: unknown option character `\\x%x'.\n", optopt);
}
print_usage();
exit(1);
break;
default:
print_usage();
exit(1);
break;
}/* end switch a */
}/* end while getopt() */
if(FileName==NULL) {fprintf(stderr,"Need an input\n");exit(1);}
for (int i = 0; i < 64; i++) {
struct sigaction sa;
std::memset(&sa, 0, sizeof(sa));
sa.sa_handler = terminate;
sigaction(i, &sa, NULL);
}
FILE *iqfile=NULL;
if(strcmp(FileName,"-")==0)
iqfile=fopen("/dev/stdin","rb");
else
iqfile=fopen(FileName ,"rb");
if (iqfile==NULL)
{
printf("input file issue\n");
exit(0);
}
#define IQBURST 4000
int SR=48000;
int FifoSize=IQBURST*4;
iqdmasync iqtest(SetFrequency,SampleRate,14,FifoSize,MODE_IQ);
iqtest.SetPLLMasterLoop(3,4,0);
if (fdds==true) { //if instructed to operate as DDS start with carrier, otherwise I/Q mode it is
iqtest.ModeIQ=MODE_FREQ_A;
}
//iqtest.print_clock_tree();
//iqtest.SetPLLMasterLoop(5,6,0);
//=========================================================================================================
// *------ Shared memory definitions if enabled
//=========================================================================================================
if (sharedmem_token != 0) {
sharedmem_id = shmget((key_t)sharedmem_token, sizeof(struct shared_memory_struct), 0666 | IPC_CREAT); //<<<<< SET THE SHARED MEMORY KEY (Shared memory key , Size in bytes, Permission flags)
if (sharedmem_id == -1) {
printf("Shared memory shmget() failed\n");
exit(8);
}
// *----- Make the shared memory accessible to the program
pshared = shmat(sharedmem_id, (void *)0, 0);
if (pshared == (void *)-1) {
printf("Shared memory shmat() failed\n");
exit(16);
}
// *----- Assign the shared_memory segment
sharedmem = (struct shared_memory_struct *)pshared;
sharedmem->updated=false;
sharedmem->command=0x00;
sharedmem->data=0;
}
//=========================================================================================================
std::complex<float> CIQBuffer[IQBURST];
while(running)
{
int CplxSampleNumber=0;
switch(InputType)
{
case typeiq_i16:
{
static short IQBuffer[IQBURST*2];
int nbread=fread(IQBuffer,sizeof(short),IQBURST*2,iqfile);
if(nbread>0)
{
for(int i=0;i<nbread/2;i++)
{
if(i%Decimation==0)
{
CIQBuffer[CplxSampleNumber++]=std::complex<float>(IQBuffer[i*2]/32768.0,IQBuffer[i*2+1]/32768.0);
}
}
}
else
{
printf("End of file\n");
if(loop_mode_flag)
fseek ( iqfile , 0 , SEEK_SET );
else
running=false;
}
}
break;
case typeiq_u8:
{
static unsigned char IQBuffer[IQBURST*2];
int nbread=fread(IQBuffer,sizeof(unsigned char),IQBURST*2,iqfile);
if(nbread>0)
{
for(int i=0;i<nbread/2;i++)
{
if(i%Decimation==0)
{
CIQBuffer[CplxSampleNumber++]=std::complex<float>((IQBuffer[i*2]-127.5)/128.0,(IQBuffer[i*2+1]-127.5)/128.0);
}
}
}
else
{
printf("End of file\n");
if(loop_mode_flag)
fseek ( iqfile , 0 , SEEK_SET );
else
running=false;
}
}
break;
case typeiq_float:
{
static float IQBuffer[IQBURST*2];
int nbread=fread(IQBuffer,sizeof(float),IQBURST*2,iqfile);
if(nbread>0)
{
for(int i=0;i<nbread/2;i++)
{
// *-----------------------------------------------------[Patch to introduce IPC handling]-------------------------------------------------------
// * this modification operates only when using the float stream for a minimum intervention into the original sendiq
// * for consistency and transparence it should be propagated to all pipe modes eventually
// *---------------------------------------------------------------------------------------------------------------------------------------------
if (sharedmem_token != 0) {
if (sharedmem->updated==true) {
if (sharedmem->command == 1111) {
iqtest.ModeIQ=MODE_IQ;
printf("MODE_IQ selected\n");
}
if (sharedmem->command == 2222) {
iqtest.ModeIQ=MODE_FREQ_A;
printf("MODE_FREQ_A selected\n");
}
if (sharedmem->command == 3333) {
drivedds=sharedmem->data;
printf("Drive level set (%f)\n",drivedds);
}
if (sharedmem->command == 4444) {
SetFrequency=sharedmem->data;
printf("Frequency set %f\n",SetFrequency);
iqtest.clkgpio::disableclk(4);
iqtest.clkgpio::SetAdvancedPllMode(true);
iqtest.clkgpio::SetCenterFrequency(SetFrequency,SampleRate);
iqtest.clkgpio::SetFrequency(0);
iqtest.clkgpio::enableclk(4);
}
sharedmem->updated=false;
}
}
if (iqtest.ModeIQ==MODE_FREQ_A) { //if into Frequency-Amplitude mode then only drive a constant carrier
IQBuffer[i*2]=10.0; //should be 10 Hz
IQBuffer[i*2+1]=drivedds; //at the defined drive level
}
// *---------------------------------------------------------------------------------------------------------------------------------------------
if(i%Decimation==0)
{
CIQBuffer[CplxSampleNumber++]=std::complex<float>(IQBuffer[i*2],IQBuffer[i*2+1]);
}
}
}
else
{
printf("End of file\n");
if(loop_mode_flag)
fseek ( iqfile , 0 , SEEK_SET );
else
running=false;
}
}
break;
case typeiq_double:
{
static double IQBuffer[IQBURST*2];
int nbread=fread(IQBuffer,sizeof(double),IQBURST*2,iqfile);
//if(nbread==0) continue;
if(nbread>0)
{
for(int i=0;i<nbread/2;i++)
{
if(i%Decimation==0)
{
CIQBuffer[CplxSampleNumber++]=std::complex<float>(IQBuffer[i*2],IQBuffer[i*2+1]);
}
}
}
else
{
printf("End of file\n");
if(loop_mode_flag)
fseek ( iqfile , 0 , SEEK_SET );
else
running=false;
}
}
break;
}
iqtest.SetIQSamples(CIQBuffer,CplxSampleNumber,Harmonic);
}
iqtest.stop();
// *--- Detach and delete shared memory
if (sharedmem_token != 0) {
if (shmdt(pshared) == -1) {
printf("shmdt failed\n");
} else {
if (shmctl(sharedmem_id, IPC_RMID, 0) == -1) {
printf("shmctl(IPC_RMID) failed\n");
}
}
}
// *--- end of shared memory detach
}