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perseus-sdr.c
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// ------------------------------------------------------------------------------
// Perseus SDR Library Interface
//
// Copyright (c) 2010 Nicolangelo Palermo / IV3NWV
// This file is part of the Perseus SDR Library
//
// The Perseus SDR Library is free software; you can redistribute
// it and/or modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either version
// 2.1 of the License, or (at your option) any later version.
// The Perseus SDR Library 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 Lesser General Public License for more details.
// You should have received a copy of the GNU Lesser General Public
// License along with the Perseus SDR Library;
// if not, see <http://www.gnu.org/licenses/>.
// Creation date: 10 Jan 2010
// Version: 0.1
// Author: Nicolangelo Palermo / IV3NWV
// (nicopal at microtelecom dot it)
// ------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#define __USE_GNU
#if !defined(_WIN32)
#include <dlfcn.h>
#else
#include <windows.h>
#endif
#include "perseus-sdr.h"
#include "perseus-in.h"
#include "fpga_data.h"
#define PERSEUS_MAX_DESCR 8
// local data --------------------------------------------------------
static perseus_descr perseus_list[PERSEUS_MAX_DESCR];
static int perseus_list_entries = 0;
#if !defined(_WIN32)
static pthread_t poll_libusb_thread = { 0 };
#else
static HANDLE poll_libusb_thread = NULL;
#endif
static int poll_libusb_thread_flag = 0;
static int poll_libusb_thread_stop = FALSE;
static char myPath [PATH_MAX+1] = {0};
static char appName[PATH_MAX+1] = {0};
static char appPath[PATH_MAX+1] = {0};
static libusb_context* g_libusb_context = NULL;
// local function decl -----------------------------------------------
#if !defined _WIN32
static void *poll_libusb_thread_fn(void *pparams);
#else
DWORD WINAPI poll_libusb_thread_fn(void *pparams);
#endif
static int perseus_set_presel(perseus_descr *descr, uint8_t presel_flt_id);
// API implementation ------------------------------------------------
void perseus_set_debug(int level)
{
perseus_dbg_level = level;
}
int perseus_init(void)
{
ssize_t i, num_devs, num_perseus = 0;
libusb_device **list;
libusb_device *device;
dbgprintf(3,"perseus_init()");
memset(perseus_list, 0, sizeof(perseus_descr)*PERSEUS_MAX_DESCR);
// try to detect the directory from which the library has been loaded
#if !defined _WIN32
{
Dl_info info;
char sep = '/';
if (dladdr( &perseus_init, &info ) != 0) {
dbgprintf(3,"Executable: %s", info.dli_fname);
strcpy (myPath, info.dli_fname);
}
#elif defined _WIN32
{
char sep = '\\';
if (GetModuleFileName(NULL, myPath, sizeof(myPath)) == 0) {
return errorset(PERSEUS_CANTCREAT, "can't read executable location");
} else {
dbgprintf(3, "EXE: [%s]", myPath);
}
#else
#error "UNKNOWN ENVIRONMENT"
#endif
if (strlen(myPath)) {
char *pos;
pos = strrchr (myPath, sep);
if (pos) {
*pos = '\0';
strcpy (appPath, myPath);
appPath[strlen(myPath)] = sep;
strcpy (appName, pos+1);
}
}
dbgprintf(3, "path: [%s] name: [%s]", appPath, appName);
}
libusb_init(&g_libusb_context);
libusb_set_debug(g_libusb_context, 3 /* LIBUSB_LOG_LEVEL_INFO*/ );
// find all perseus devices
num_devs = libusb_get_device_list(g_libusb_context, &list);
for (i=0;i<num_devs;i++) {
struct libusb_device_descriptor descr;
device = list[i];
libusb_get_device_descriptor (device, &descr);
perseus_list[num_perseus].index = num_perseus;
perseus_list[num_perseus].device = device;
perseus_list[num_perseus].bus = libusb_get_bus_number(device);
perseus_list[num_perseus].devaddr = libusb_get_device_address(device);
dbgprintf(2, "Found device with VID/PID %04X:%04X on BUS%d ADDR%d",
descr.idVendor,
descr.idProduct,
perseus_list[num_perseus].bus,
perseus_list[num_perseus].devaddr);
if (descr.idVendor==PERSEUS_VID) {
if (descr.idProduct==PERSEUS_PID_BLANKEEPROM) {
perseus_list[num_perseus].is_cypress_ezusb = TRUE;
libusb_ref_device(device);
num_perseus++;
}
else
if (descr.idProduct==PERSEUS_PID) {
libusb_ref_device(device);
num_perseus++;
}
}
if (num_perseus==PERSEUS_MAX_DESCR)
break;
}
perseus_list_entries = num_perseus;
libusb_free_device_list(list, 1);
// start the libusb polling thread
if (perseus_list_entries > 0 && poll_libusb_thread_flag == 0) {
poll_libusb_thread_stop = FALSE;
#if !defined _WIN32
if (pthread_create(&poll_libusb_thread, NULL, &poll_libusb_thread_fn, NULL)!= 0) {
#else
HANDLE h =
CreateThread(
/* _In_opt_ LPSECURITY_ATTRIBUTES lpThreadAttributes */ NULL,
/* _In_ SIZE_T dwStackSize*/ 102400,
/* _In_ LPTHREAD_START_ROUTINE lpStartAddress */ poll_libusb_thread_fn,
/* _In_opt_ LPVOID lpParameter *) */ NULL,
/* _In_ DWORD dwCreationFlags */ 0,
/* _Out_opt_ LPDWORD lpThreadId */ NULL
);
poll_libusb_thread = h;
if (h == NULL) {
#endif
return errorset(PERSEUS_CANTCREAT, "can't create poll libusb thread");
} else {
poll_libusb_thread_flag = 1;
}
}
return errornone(perseus_list_entries);
}
int perseus_exit(void)
{
int i;
perseus_descr *descr;
dbgprintf(3,"perseus_exit(): poll_libusb_thread_flag=%d", poll_libusb_thread_flag);
if (poll_libusb_thread_flag != 0) {
poll_libusb_thread_stop = TRUE;
#if !defined _WIN32
pthread_join(poll_libusb_thread, NULL);
#else
WaitForSingleObject ( poll_libusb_thread, INFINITE);
#endif
poll_libusb_thread_flag = 0;
}
for (i = 0; i < perseus_list_entries; i++)
{
descr = &perseus_list[i];
if ((descr != NULL) && (descr->device != NULL)) {
perseus_close(descr);
libusb_unref_device(descr->device); // moved from close()
}
}
libusb_exit(g_libusb_context);
g_libusb_context = NULL;
dbgprintf(5,"after libusb_exit");
perseus_list_entries = 0;
poll_libusb_thread_flag = 0;
poll_libusb_thread_stop = FALSE;
return errornone(0);
}
perseus_descr *perseus_open(int nDev)
{
perseus_descr *descr;
int rc;
int rc1, rc2, rc3;
dbgprintf(3,"perseus_open(%d)",nDev);
if (nDev<0 || nDev>=perseus_list_entries) {
errorset(PERSEUS_INVALIDDEV, "invalid device id %d", nDev);
return NULL;
}
descr = &perseus_list[nDev];
if (descr == NULL) {
errorset(PERSEUS_NULLDESCR, "null descriptor");
return NULL;
}
if (descr->handle!=NULL) {
errorset(PERSEUS_ALREADYOPEN, "device %d already open", nDev);
return NULL;
}
if((rc = libusb_open(descr->device, &descr->handle))!=0) {
errorset(PERSEUS_LIBUSBERR, "libusb_open error %d", rc);
return NULL;
}
if (descr->is_cypress_ezusb) {
// remove any kernel driver for Cypress EzUSB devices
int iface;
for (iface=0;iface<4;iface++)
if (libusb_kernel_driver_active(descr->handle,iface)==1) {
dbgprintf(1,"Detaching kernel driver (interface %d) for device %04X:%04X)",
iface,
PERSEUS_VID,
PERSEUS_PID_BLANKEEPROM);
if (libusb_detach_kernel_driver(descr->handle,iface)!=0)
dbgprintf(1,"Interface %d detach failed",iface);
}
}
if((rc = libusb_set_configuration(descr->handle,1))!=0) {
errorset(PERSEUS_LIBUSBERR, "libusb_set_configuration error %d", rc);
return NULL;
}
if((rc = libusb_claim_interface(descr->handle,0))!=0) {
errorset(PERSEUS_LIBUSBERR, "libusb_claim_interface error %d", rc);
return NULL;
}
if((rc = libusb_set_interface_alt_setting(descr->handle,0,0))!=0) {
errorset(PERSEUS_LIBUSBERR, "libusb_set_interface_alt_setting error %d", rc);
return NULL;
}
rc1 = libusb_clear_halt(descr->handle, PERSEUS_EP_CMD);
rc2 = libusb_clear_halt(descr->handle, PERSEUS_EP_STATUS);
rc3 = libusb_clear_halt(descr->handle, PERSEUS_EP_DATAIN);
descr->is_preserie = FALSE;
if (rc1 == 0 && rc2 == 0 && rc3 == 0)
descr->firmware_downloaded = TRUE;
else
descr->firmware_downloaded = FALSE;
descr->fpga_configured = FALSE;
descr->adc_clk_freq = PERSEUS_ADC_CLK_FREQ;
return errornone(descr);
}
int perseus_close(perseus_descr *descr)
{
int rc;
dbgprintf(3,"perseus_close(%p)",descr);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errornone(0);
if (descr->firmware_downloaded)
perseus_fx2_shutdown(descr->handle);
dbgprintf(3,"releasing interface...");
rc = libusb_release_interface(descr->handle,0);
if (rc<0) {
dbgprintf(3,"libusb_release_interface rc =%d",rc);
}
else {
dbgprintf(3,"done");
}
// AM 20141112
// need to decrement the reference counter in order to completely free
// libusb-1.0 internal resources
//libusb_unref_device(descr->device); // do it at exit time else you are not able to open again
dbgprintf(3,"closing device handle...");
libusb_close(descr->handle);
descr->handle=NULL;
return errornone(0);
}
int perseus_firmware_download(perseus_descr *descr, char *fname)
{
int rc;
ssize_t i, num_devs;
libusb_device **list;
libusb_device *device;
int bus, devaddr;
int index;
dbgprintf(3,"perseus_firmware_download(%p,%s)",descr,(fname?fname:"Null"));
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded == TRUE) {
descr->presel_flt_id = PERSEUS_FLT_UNDEF;
dbgprintf(3,"Firmware found !!!! Reading device eeprom...");
if (perseus_fx2_read_eeprom(descr->handle,
PERSEUS_EEPROMADR_PRODID,
&descr->product_id,
sizeof(eeprom_prodid))<0)
return errorset(PERSEUS_EEPROMREAD, "failed to read device eeprom");
dbgprintf(3,"read eeprom successful");
if (descr->product_id.prodcode!=PERSEUS_PRODCODE) {
descr->is_preserie = TRUE;
dbgprintf(3,"Pre-production unit found");
}
return errornone(0);
}
dbgprintf(3,"perseus_firmware_download(%p,%s)",descr,(fname?fname:"Null"));
descr->firmware_downloaded = FALSE;
descr->fpga_configured = FALSE;
if (fname==NULL) {
if ((rc=perseus_fx2_download_std_firmware(descr->handle))<0)
return rc;
}
else
return errorset(PERSEUS_FNNOTAVAIL, "Firmware download from files not implemented");
dbgprintf(3,"done");
perseus_close(descr);
dbgprintf(3,"re-enumerating usb devices, please wait...");
sleep(4);
index = descr->index; // get our index in the perseus descriptor list
// scan usb devices after reenumeration
// we assume that the device we have programmed is the last on list
// in the same bus as it was prior to reenumeration
perseus_list[index].device = NULL;
num_devs = libusb_get_device_list(NULL, &list);
for (i=0;i<num_devs;i++) {
struct libusb_device_descriptor usbdescr;
device = list[i];
libusb_get_device_descriptor (device, &usbdescr);
bus = libusb_get_bus_number(device);
devaddr = libusb_get_device_address(device);
dbgprintf(2, "Found device with VID/PID %04X:%04X on BUS%d ADDR%d",
usbdescr.idVendor,
usbdescr.idProduct,
bus,
devaddr);
if (bus == perseus_list[index].bus)
if (usbdescr.idVendor==PERSEUS_VID && usbdescr.idProduct==PERSEUS_PID) {
dbgprintf(2, "Perseus found on BUS%d ADDR%d after re-enumeration", bus, devaddr);
perseus_list[index].device = device; // update usb device descriptor
perseus_list[index].devaddr = devaddr; // and address
perseus_list[index].is_cypress_ezusb = FALSE; // it's a PERSEUS_PID
}
}
if (perseus_list[index].device==NULL) {
// we could not find it
libusb_free_device_list(list, 1);
return errorset(PERSEUS_DEVNOTFOUND, "failed to find device");
}
// free all descriptor but our
libusb_ref_device(perseus_list[index].device);
// AM20141112
// libusb_free_device_list moved after the open
// as per http://libusb.sourceforge.net/api-1.0/group__dev.html#details//
//libusb_free_device_list(list, 1);
dbgprintf(3,"Please wait...");
dbgprintf(3,"try to open the device after re-enumeration...");
// reopen our device
if (perseus_open(descr->index)==NULL)
return errorset(PERSEUS_LIBUSBERR, "perseus_open error %d, reopening.", rc);
libusb_free_device_list(list, 1);
dbgprintf(3,"open successful");
descr->firmware_downloaded = TRUE;
descr->presel_flt_id = PERSEUS_FLT_UNDEF;
dbgprintf(3,"reading device eeprom...");
if (perseus_fx2_read_eeprom(descr->handle,
PERSEUS_EEPROMADR_PRODID,
&descr->product_id,
sizeof(eeprom_prodid))<0)
return errorset(PERSEUS_EEPROMREAD, "failed to read device eeprom");
dbgprintf(3,"read eeprom successful");
if (descr->product_id.prodcode!=PERSEUS_PRODCODE) {
descr->is_preserie = TRUE;
dbgprintf(3,"Pre-production unit found");
}
return errornone(0);
}
int perseus_get_product_id(perseus_descr *descr, eeprom_prodid *prodid)
{
dbgprintf(3,"perseus_get_product_id(%p,...)",descr);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (prodid==NULL)
return errorset(PERSEUS_NULLDESCR, "null eeprom_prodid pointer");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
memcpy(prodid, &descr->product_id, sizeof(eeprom_prodid));
return errornone(0);
}
int perseus_set_attenuator(perseus_descr *descr, uint8_t atten_id)
{
int rc;
dbgprintf(3,"perseus_set_attenuator(%p,%d)",descr, atten_id);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->is_preserie)
atten_id ^= PERSEUS_ATT_30DB;
descr->frontendctl = (atten_id<<4)|(descr->frontendctl&0x0F);
if ((rc=perseus_fx2_set_porte(descr->handle, descr->frontendctl))<0)
return rc;
return errornone(0);
}
int perseus_set_adc(perseus_descr *descr, int enableDither, int enablePreamp)
{
int rc;
dbgprintf(3,"perseus_set_adc(%p,%d,%d)",descr, enableDither, enablePreamp);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->fpga_configured==FALSE)
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured");
if (enableDither)
descr->sioctl.ctl |=PERSEUS_SIO_DITHER;
else
descr->sioctl.ctl &=~PERSEUS_SIO_DITHER;
if (enablePreamp)
descr->sioctl.ctl |=PERSEUS_SIO_GAINHIGH;
else
descr->sioctl.ctl &=~PERSEUS_SIO_GAINHIGH;
if ((rc=perseus_fx2_sio(descr->handle, &descr->sioctl, NULL))<0)
return rc;
return errornone(0);
}
int perseus_set_ddc_center_freq(perseus_descr *descr, double center_freq_hz, int enablePresel)
{
uint8_t presel_flt_id;
int rc;
dbgprintf(3,"perseus_set_ddc_center_freq(%p,%.3f,%d)",descr, center_freq_hz, enablePresel);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->fpga_configured==FALSE)
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured");
if (center_freq_hz<PERSEUS_DDC_FREQ_MIN || center_freq_hz>PERSEUS_DDC_FREQ_MAX)
return errorset(PERSEUS_ERRPARAM,
"center_freq not in the range [%d..%d]",
PERSEUS_DDC_FREQ_MIN,
PERSEUS_DDC_FREQ_MAX);
// Compute and set the value of the frequency register of the
// Perseus 32 bit phase accumulator with the usual formula:
// FREG = (Flo/Fclk)*(2^32)
descr->sioctl.freg = (uint32_t)(center_freq_hz/descr->adc_clk_freq*4.294967296E9);
if ((rc=perseus_fx2_sio(descr->handle, &descr->sioctl, NULL))<0)
return rc;
// Set preselection filter accordingly to the tuning freq
if (enablePresel==FALSE)
presel_flt_id = PERSEUS_FLT_WB;
else
if (center_freq_hz<PERSEUS_FLT_1_FC)
presel_flt_id = PERSEUS_FLT_1;
else if (center_freq_hz<PERSEUS_FLT_2_FC)
presel_flt_id = PERSEUS_FLT_2;
else if (center_freq_hz<PERSEUS_FLT_3_FC)
presel_flt_id = PERSEUS_FLT_3;
else if (center_freq_hz<PERSEUS_FLT_3_FC)
presel_flt_id = PERSEUS_FLT_3;
else if (center_freq_hz<PERSEUS_FLT_4_FC)
presel_flt_id = PERSEUS_FLT_4;
else if (center_freq_hz<PERSEUS_FLT_5_FC)
presel_flt_id = PERSEUS_FLT_5;
else if (center_freq_hz<PERSEUS_FLT_6_FC)
presel_flt_id = PERSEUS_FLT_6;
else if (center_freq_hz<PERSEUS_FLT_7_FC)
presel_flt_id = PERSEUS_FLT_7;
else if (center_freq_hz<PERSEUS_FLT_8_FC)
presel_flt_id = PERSEUS_FLT_8;
else if (center_freq_hz<PERSEUS_FLT_9_FC)
presel_flt_id = PERSEUS_FLT_9;
else if (center_freq_hz<PERSEUS_FLT_10_FC)
presel_flt_id = PERSEUS_FLT_10;
else
presel_flt_id = PERSEUS_FLT_WB;
return perseus_set_presel(descr, presel_flt_id);
}
static int perseus_set_presel(perseus_descr *descr, uint8_t presel_flt_id)
{
int rc;
if (presel_flt_id==descr->presel_flt_id)
return errornone(0);
descr->frontendctl = (descr->frontendctl&0xF0)|(presel_flt_id&0x0F);
if ((rc=perseus_fx2_set_porte(descr->handle, descr->frontendctl))<0)
return rc;
descr->presel_flt_id = presel_flt_id;
return errornone(0);
}
int perseus_start_async_input(perseus_descr *descr,
uint32_t buffersize,
perseus_input_callback callback,
void *cb_extra)
{
int rc, maxps;
dbgprintf(3,"perseus_start_async_input(%p,%d,...)",descr, buffersize);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->fpga_configured==FALSE)
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured");
if (descr->input_queue.transfer_queue!=NULL)
return errorset(PERSEUS_ASYNCSTARTED, "async input already started");
if (buffersize>16320)
return errorset(PERSEUS_ERRPARAM, "max libusb bulk buffer size is 16320 bytes");
maxps = libusb_get_max_packet_size (descr->device, PERSEUS_EP_DATAIN);
dbgprintf(3,"Max packet size on endpoint 0x%02x: %d", PERSEUS_EP_DATAIN, maxps);
switch (maxps) {
case 512:
if ((buffersize%6144)!=0)
return errorset(PERSEUS_BUFFERSIZE, "buffer size should be an integer multiple of 6144 bytes (1024 I/Q samples)");
break;
case 510:
if ((buffersize%510)!=0)
return errorset(PERSEUS_BUFFERSIZE, "buffer size should be an integer multiple of 510 bytes (85 IQ samples)");
break;
default:
return errorset(PERSEUS_ERRPARAM, "Unexpected max packet size: %d", maxps);
}
// create and submit the data in transfer queue
if ((rc=perseus_input_queue_create(&descr->input_queue, 8, descr->handle, buffersize, callback, cb_extra))<0)
dbgprintf(0,"input transfer queue creation failed");
// enable FPGA fifo
descr->sioctl.ctl |=PERSEUS_SIO_FIFOEN;
if ((rc=perseus_fx2_sio(descr->handle, &descr->sioctl, NULL))<0)
dbgprintf(0,"FPGA fifo enable failed");
return errornone(0);
}
int perseus_stop_async_input(perseus_descr *descr)
{
int rc;
double elapsed;
perseus_input_queue *queue = &descr->input_queue;
dbgprintf(3,"perseus_stop_async_input(%p)",descr);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->input_queue.transfer_queue == NULL) {
return errorset(PERSEUS_ASYNCSTARTED, "async input not started");
}
// cancel the input transfer queue
if ((rc=perseus_input_queue_cancel(&descr->input_queue))<0)
dbgprintf(0,"datain transfer queue cancel failed");
// wait for queue cancel to complete
while (perseus_input_queue_completed(queue)==FALSE) {
usleep(1000);
}
// print some statistics...
elapsed = 1.0E-6 *(queue->stop.tv_usec-queue->start.tv_usec) +
queue->stop.tv_sec-queue->start.tv_sec;
dbgprintf(3, "Elapsed time: %f s - kSamples read: %ld - Rate: %.1f kS/s\n", elapsed,
queue->bytes_received/6000, 1.0*queue->bytes_received/elapsed/6000);
// free the input transfer queue
if ((rc=perseus_input_queue_free(queue))<0)
dbgprintf(0,"datain transfer queue free failed");
// Disable the FPGA fifo
descr->sioctl.ctl &=~PERSEUS_SIO_FIFOEN;
if ((rc=perseus_fx2_sio(descr->handle, &descr->sioctl, NULL))<0)
dbgprintf(0,"FPGA fifo disable failed");
return errornone(0);
}
#if !defined _WIN32
static void *poll_libusb_thread_fn(void *pparams)
#else
DWORD WINAPI poll_libusb_thread_fn(void *pparams)
#endif
{
#if !defined _WIN32
int maxpri, rc;
#endif
dbgprintf(3,"poll libusb thread started...");
#if !defined _WIN32
if ((maxpri = sched_get_priority_max(SCHED_FIFO))>=0) {
struct sched_param sparam;
dbgprintf(3,"setting thread priority to %d...", maxpri);
sparam.sched_priority = maxpri;
rc = pthread_setschedparam(poll_libusb_thread, SCHED_FIFO, &sparam);
if (rc<0) {
dbgprintf(0,"pthread_setschedparam failed. rc=%d",rc);
}
else {
dbgprintf(3,"done");
}
}
#else
#endif
// handle libusb events until perseus_exit is called
while (poll_libusb_thread_stop==FALSE) {
static struct timeval tv;
tv.tv_sec = 1, tv.tv_usec = 0;
libusb_handle_events_timeout(g_libusb_context, &tv);
}
dbgprintf(3,"poll libusb thread terminating...");
return 0;
}
static int getFpgaFile (int xsr)
{
unsigned int i;
//const char *fn = 0;
int prev = 0;
int index = -1;
int vs = nFpgaImages;
for (i=0; i<vs; ++i) {
if ( xsr > fpgaImgTbl[i].speed) {
if ( i < (vs-1)) {
prev = fpgaImgTbl[i].speed;
continue;
} else {
//fn = fpgaImgTbl[i].name;
index = i;
break;
}
} else {
int m = (fpgaImgTbl[i].speed + prev) / 2;
if (xsr <= m) {
if (i==0) {
return i;
} else {
return i-1;
}
} else
return i;
}
}
return index;
}
int perseus_get_sampling_rates (perseus_descr *descr, int *buf, unsigned int size)
{
if (size > 0) {
unsigned int i, j;
for (i=0; i < size; ++i) { buf[i] = 0; }
for (i=0,j=0; i< nFpgaImages; ++i) {
if (j < size) {
buf[j++] = fpgaImgTbl[i].speed;
} else {
return errorset (PERSEUS_BUFFERSIZE, "Insufficient buffer size");
}
}
return errornone(0);
} else {
return errorset (PERSEUS_ERRPARAM, "Zero lenght buffer");
}
}
int perseus_set_sampling_rate(perseus_descr *descr, int new_sample_rate)
{
int index;
dbgprintf(3,"perseus_set_sampling_rate(%p,%d)",descr, new_sample_rate);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
index = getFpgaFile (new_sample_rate);
if ( index >= 0 ) {
if (perseus_fx2_fpga_config_sr(descr->handle, fpgaImgTbl[index].speed) < 0) {
dbgprintf(0,"fpga configuration error\n");
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured: error in perseus_set_sampling_rate. [%d]", index);
}
} else {
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured: sampling rate not found");
}
descr->fpga_configured = TRUE;
dbgprintf(3,"fpga config successfull");
return errornone(0);
}
int perseus_set_sampling_rate_n(perseus_descr *descr, unsigned int nso)
{
dbgprintf(3,"perseus_set_sampling_rate_n(%p,%d)",descr, nso);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
//
// Compute the size of the vector
int vs = nFpgaImages;
if (nso >= vs) {
return errorset (PERSEUS_ERRPARAM, "Invalid index in vector");
} else {
return perseus_set_sampling_rate(descr, fpgaImgTbl[nso].speed);
}
}
//
// Static data for attenuation fromn numerical value in dB to constants conversion
//
typedef struct _atten {
int id;
int valInDb;
} AttenuatorValues ;
static AttenuatorValues av [] = {
{ PERSEUS_ATT_0DB , 0 } ,
{ PERSEUS_ATT_10DB, 10 } ,
{ PERSEUS_ATT_20DB, 20 } ,
{ PERSEUS_ATT_30DB, 30 } ,
} ;
int perseus_set_attenuator_in_db (perseus_descr *descr, int new_level_in_db)
{
int i;
dbgprintf(3,"perseus_set_attenuator_in_db(%p,%d)",descr, new_level_in_db);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->fpga_configured==FALSE)
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured");
for (i=0; i< (sizeof(av)/sizeof(av[0])); ++i)
if (new_level_in_db == av[i].valInDb) {
return perseus_set_attenuator(descr, av[i].id);
}
return errorset(PERSEUS_ATTERROR, "set attenuator error, bad value: %d", new_level_in_db);
}
int perseus_get_attenuator_values (perseus_descr *descr, int *buf, unsigned int size)
{
if (size > 0) {
unsigned int i, j;
for (i=0; i < size; ++i) { buf[i] = -1; }
for (i=0,j=0; i< (sizeof(av)/sizeof(av[0])); ++i) {
if (j < size) {
buf[j++] = av[i].valInDb;
} else {
return errorset (PERSEUS_BUFFERSIZE, "Insufficient buffer size");
}
}
return errornone(0);
} else {
return errorset (PERSEUS_ERRPARAM, "Zero lenght buffer");
}
}
int perseus_set_attenuator_n (perseus_descr *descr, int nlo)
{
dbgprintf(3,"perseus_set_attenuator_n(%p,%d)",descr, nlo);
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (descr->firmware_downloaded==FALSE)
return errorset(PERSEUS_FWNOTLOADED, "firmware not loaded");
if (descr->fpga_configured==FALSE)
return errorset(PERSEUS_FPGANOTCFGD, "FPGA not configured");
//
// Compute the size of the vector
int vs = (sizeof(av)/sizeof(av[0]));
if (nlo >= vs) {
return errorset (PERSEUS_ERRPARAM, "Invalid index in vector");
} else {
if (perseus_set_attenuator(descr, av[nlo].id) < 0) {
return errorset(PERSEUS_ATTERROR, "set attenuator error");
} else {
return errornone(0);
}
}
}
int perseus_is_preserie(perseus_descr *descr, int *flag)
{
if (descr==NULL)
return errorset(PERSEUS_NULLDESCR, "null descriptor");
if (descr->handle==NULL)
return errorset(PERSEUS_DEVNOTOPEN, "device not open");
if (flag) *flag = descr->is_preserie;
if (descr->is_preserie)