/* Linux / Windows program to control the frequency of a si570 synthesizer
ON5GN 6 jan 2012
Under Linux:
-use the linux version of function void si570_sleep(int us)
-compile with
gcc -Wall -o set_si570_freq set_si570_freq.c -lusb -lm
-run with sudo ./set_si570_freq
Under Windows:
-use the windows version of function void si570_sleep(int us)
-compile with mingw
C:\mingw\bin\mingw32-gcc -Wall -o set_si570_freq set_si570_freq.c -lusb -lm
-run with set_si570_freq.exe
*/
#include <stdio.h> /* Standard input/output definitions */
#include <string.h> /* String function definitions */
#include <unistd.h> /* UNIX standard function definitions */
#include <sys/time.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <libusb.h>
#include <QDebug>
#define USB_SUCCESS 0
#define USB_ERROR_NOTFOUND 1
#define USB_ERROR_ACCESS 2
#define USB_ERROR_IO 3
#define VENDOR_NAME "www.obdev.at"
#define PRODUCT_NAME "DG8SAQ-I2C"
#define USBDEV_SHARED_VENDOR 0x16C0 // VOTI VID
#define USBDEV_SHARED_PRODUCT 0x05DC // OBDEV PID
// Use obdev's generic shared VID/PID pair
// following the rules outlined in
// firmware/usbdrv/USBID-License.txt.
#define REQUEST_SET_FREQ_BY_VALUE 0x32
#define MAX_USB_ERR_CNT 6
double freq_parm;
double delay_average;
int from_freq;
int to_freq;
int increment_freq;
int display_freq = -1;
int delay;
static libusb_device_handle * global_si570usb_handle;
void si570_sleep(int us)
{
#if defined (Q_OS_WIN)
::Sleep (us / 1000);
#else
::usleep (us);
#endif
}
double round(double x)
{
int i=x+0.5;
return (double)i;
}
double current_time(void) //for delay measurements
{
struct timeval t;
gettimeofday(&t,NULL);
return 0.000001*t.tv_usec+t.tv_sec;
}
unsigned char Si570usbOpenDevice(libusb_device_handle **device, char *usbSerialID);
void setLongWord( int value, char * bytes);
int setFreqByValue(libusb_device_handle * handle, double frequency);
void sweepa_freq(void);
void sweepm_freq(void);
int set570(double freq_MHz)
{
//###
// qDebug() << "A" << freq_MHz;
// if(freq_MHz != 999.0) return 0;
//###
char * my_usbSerialID = nullptr;
// MAIN MENU DIALOG
if (Si570usbOpenDevice(&global_si570usb_handle, my_usbSerialID) != USB_SUCCESS)
{
return -1;
}
//SET FREQUENCY
if((freq_MHz < 3.45)|(freq_MHz > 866.0)) return -2;
setFreqByValue(global_si570usb_handle,freq_MHz);
return 0;
}
unsigned char Si570usbOpenDevice (libusb_device_handle * * udh, char * usbSerialID)
{
if (*udh) return USB_SUCCESS; // only scan USB devices 1st time
int vendor = USBDEV_SHARED_VENDOR;
char *vendorName = (char *)VENDOR_NAME;
int product = USBDEV_SHARED_PRODUCT;
char *productName = (char *)PRODUCT_NAME;
libusb_device_handle * handle = nullptr;
unsigned char errorCode = USB_ERROR_NOTFOUND;
char buffer[256];
int rc;
if ((rc = libusb_init (nullptr)) < 0) // init default context (safe to repeat)
{
printf ("usb initialization error message %s\n", libusb_error_name (rc));
return errorCode = USB_ERROR_ACCESS;
}
libusb_device * * device_list;
int device_count = libusb_get_device_list (nullptr, &device_list);
if (device_count < 0)
{
puts ("no usb devices");
errorCode = USB_ERROR_NOTFOUND;
}
else
{
for (int i = 0; i < device_count; ++i)
{
libusb_device * device = device_list[i];
libusb_device_descriptor descriptor;
if ((rc = libusb_get_device_descriptor (device, &descriptor)) < 0)
{
printf ("usb get device descriptor error message %s\n", libusb_error_name (rc));
errorCode = USB_ERROR_ACCESS;
continue;
}
if (vendor == descriptor.idVendor && product == descriptor.idProduct)
{
// now we must open the device to query strings
if ((rc = libusb_open (device, &handle)) < 0)
{
printf ("usb open device error message %s\n", libusb_error_name (rc));
errorCode = USB_ERROR_ACCESS;
continue;
}
if (!vendorName && !productName)
{
break; // good to go
}
if (libusb_get_string_descriptor_ascii (handle, descriptor.iManufacturer
, reinterpret_cast<unsigned char *> (buffer), sizeof buffer) < 0)
{
printf ("usb get vendor name error message %s\n", libusb_error_name (rc));
errorCode = USB_ERROR_IO;
}
else
{
if (!vendorName || !strcmp (buffer, vendorName))
{
if (libusb_get_string_descriptor_ascii (handle, descriptor.iProduct
, reinterpret_cast<unsigned char *> (buffer), sizeof buffer) < 0)
{
printf ("usb get product name error message %s\n", libusb_error_name (rc));
errorCode = USB_ERROR_IO;
}
else
{
if (!productName || !strcmp (buffer, productName))
{
if (libusb_get_string_descriptor_ascii (handle, descriptor.iSerialNumber
, reinterpret_cast<unsigned char *> (buffer), sizeof buffer) < 0)
{
printf ("usb get serial number error message %s\n", libusb_error_name (rc));
errorCode = USB_ERROR_IO;
}
else
{
if (!usbSerialID || !strcmp (buffer, usbSerialID))
{
break; // good to go
}
}
}
}
}
}
libusb_close (handle);
handle = nullptr;
}
}
libusb_free_device_list (device_list, 1);
}
if (handle)
{
errorCode = USB_SUCCESS;
*udh = handle;
}
return errorCode;
}
void setLongWord( int value, char * bytes)
{
bytes[0] = value & 0xff;
bytes[1] = ((value & 0xff00) >> 8) & 0xff;
bytes[2] = ((value & 0xff0000) >> 16) & 0xff;
bytes[3] = ((value & 0xff000000) >> 24) & 0xff;
}
int setFreqByValue(libusb_device_handle * handle, double frequency)
{
// Windows Doc from PE0FKO:
//
// Command 0x32:
// -------------
// Set the oscillator frequency by value. The frequency is formatted in MHz
// as 11.21 bits value.
// The "automatic band pass filter selection", "smooth tune",
// "one side calibration" and the "frequency subtract multiply" are all
// done in this function. (if enabled in the firmware)
//
// Default: None
//
// Parameters:
// requesttype: LIBUSB_ENDPOINT_OUT
// request: 0x32
// value: 0
// index: 0
// bytes: pointer 32 bits integer
// size: 4
//
// Code sample:
// uint32_t iFreq;
// double dFreq;
//
// dFreq = 30.123456; // MHz
// iFreq = (uint32_t)( dFreq * (1UL << 21) )
// r = usbCtrlMsgOUT(0x32, 0, 0, (char *)&iFreq, sizeof(iFreq));
// if (r < 0) Error
//
char buffer[4];
int i2cAddress = 0x55;
int request = REQUEST_SET_FREQ_BY_VALUE;
int value = 0x700 + i2cAddress;
int my_index = 0;
int retval;
int err_cnt;
err_cnt =0;
set_again:;
setLongWord(round(frequency * 2097152.0), buffer); // 2097152=2^21
retval = libusb_control_transfer (
handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_OUT,
request,
value,
my_index,
reinterpret_cast<unsigned char *> (buffer),
sizeof(buffer),
5000);
if (retval != 4) {
err_cnt ++;
if(err_cnt < MAX_USB_ERR_CNT) {
si570_sleep(1000); // delay 1000 microsec
goto set_again;
} else {
printf("Error when setting frequency, returncode=%i\n",retval);
printf("usb error message: %s\n", libusb_error_name (retval));
}
}
return retval;
}