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Hi Franco,

I'm not sure to understand the problem, could you explain a bit more what you want to achieve??
Do you want to tune the SI570 VFO from Quisk, with a certain IF frequency offset?
Do you want to tune the SI570 via USB or via I2C??

I think such functionality should be implemented in the Quisk hardware file, see the documentation for "ChangeFrequency(self, tune, vfo, source='', band='', event=None)".
I did that with I2C control of the SI570.
For USB control of the SI570 look in the softrock folder, file?hardware_usb.py; but I have no experience with it.

vy 73 de Yves, hb9ewy

Ciao Franco

I can't help you with the USB control of the SI570, I never used that interface.

Below you'll find some sections of my Quisk HW file which were modified to use an 9MHz IF with the 2m Transverter to the 20m band.?
They are ment for inspiration. The radio also has an rotary encoder for tuning (read vie GPIO), so you don't need the related code.
The 2 functions??ChangeFrequency and?ReturnFrequency are the the ones you need to adapt - read Jim's documentation about them.

from Rotary.rotary_class import RotaryEncoder
from pyrpio.i2c import I2C
from pyrpiic.clock.si570 import SI570

??? self.tune_freq = 0??? ??? # keep track of tune frequency by rotary encoder ***
??? self.tuned_extern = 0??? # flag, true indicates that an external tuning is pending, LO must be changed
??? self.if_freq = 8.999*1.0E6??? # IF frequency for use with mixing frontend, depends on filter, for USB
??? self.lo_freq = 0.0??? ??? # frequency of the local oscillator
??? self.lo_div = 8??? ??? # divider of the lo signal

??? # Make instance for si570
??? # Create and open I2C-1 bus
??? self.i2c1 = I2C('/dev/i2c-1')
??? self.i2c1.open()
??? # Create clock
??? self.clock = SI570(self.i2c1, 0x55)

? def ChangeFrequency(self, tx_freq, vfo_freq, source='', band='', event=None):
??? if tx_freq and tx_freq > 0:
????? self.tx_frequency = tx_freq
????? self.tune_freq = tx_freq # keep track of the new tune frequency ***
????? tx = int(tx_freq - self.transverter_offset)
????? if self.band == '2': tx = int(self.if_freq) # *** fix tx frequency for 2m band, on the IF of about 9MHz
????? self.pc2hermes[ 4] = tx >> 24 & 0xff??? ??? # C0 index == 1, C1, C2, C3, C4: Tx freq, MSB in C1
????? self.pc2hermes[ 5] = tx >> 16 & 0xff
????? self.pc2hermes[ 6] = tx >>? 8 & 0xff
????? self.pc2hermes[ 7] = tx?????? & 0xff
????? if self.band == '2': #adjust the LO si570 to the correct frequency from IF frequency to the 20m band
??????? self.lo_freq = self.lo_div * (tx_freq - self.transverter_offset - self.if_freq)
??????? if DEBUG: print("LO freq:", self.lo_freq)
??????? self.clock.set_frequency_smooth(self.lo_freq)? ??? # ---> here the SI570 VFO gets tuned
??? if self.vfo_frequency != vfo_freq:
????? self.vfo_frequency = vfo_freq
????? vfo = int(vfo_freq - self.transverter_offset)
????? self.pc2hermes[ 8] = vfo >> 24 & 0xff??? ??? # C0 index == 2, C1, C2, C3, C4: Rx freq, MSB in C1
????? self.pc2hermes[ 9] = vfo >> 16 & 0xff
????? self.pc2hermes[10] = vfo >>? 8 & 0xff
????? self.pc2hermes[11] = vfo?????? & 0xff
??? if DEBUG >1: print("Change freq Tx", tx_freq, "vfo:", vfo_freq, " ", "tx:", tx)
??? QS.pc_to_hermes(self.pc2hermes)
??? return tx_freq, vfo_freq

?

?def ReturnFrequency(self):??? # Return the current tuning and VFO frequency
??? if self.tune_freq == 0 or self.tuned_extern == 0:
????? return None, None #frequencies have not changed / start
??? elif self.band == '2':
????? self.lo_freq = self.lo_div * (self.tune_freq - self.transverter_offset - self.if_freq)
????? if DEBUG: print("LO freq:", self.lo_freq)
????? self.clock.set_frequency_smooth(self.lo_freq)?? # ---> here the SI570 VFO gets tuned
????? self.tuned_extern = 0
????? return self.tune_freq, self.vfo_frequency # because tuning by rotary encoder ***
??? elif self.tuned_extern >0 :
????? self.tuned_extern = 0
????? return self.tune_freq, self.vfo_frequency # because tuning by rotary encoder ***
??? else:
????? return None, None

Try to separate the different tasks and proceed and integrate in small steps which could be tested independently. e.g. first implement and test the SI570 control from Python, then?calculate the needed LO frequency and print it out to see whether the LO tracks correctly, etc.

vy 73 de Yves, hb9ewy

Hi Yves and everybody,

I managed it! Indeed I changed two lines in the "hardware_usb.py" file. The QRP2000 signal generator essentially in Quisk connects to the PC via the USB port like Softrock, but in the "hardware_usb.py" file there are two lines containing " * 4 ", and that is where the frequency is multiplied by 4. Removing the * 4 the QRP2000 to generate the frequency 3.5Mhz actually generates 3.5Mhz and not 14Mhz (= 3.5Mhz * 4) anymore.
Then regarding the 10.7Mhz offset, it's trivial as I use the transverter option in the menu of Quisk in "bands" (just like Softrock) and to receive a 3.5Mhz with a 10.7Mhz intermediate frequency I set the offset to "- 10700000".
It's very simple! The terminal command rigctl -vvvvv -m 2509 get_freq was very useful to check the generated frequency.

That's all, thank you! And I hope other QRP2000 owners will be using Quisk!

Franco iz2oos

Hi Franco,

According to Your advice I also tried to change the two instances in the hardware_usb.py? file "* 4" => "* 1" but with no change in the output frequency from my Softrock type of rig, still multiplied by four. The offset worked as expected, though. I am not sure if I got your advice right, please verify my interpretation ! What I am trying to do is to control my Si590 freq generator with some software running under Linux, for Windows the are plenty and in particular, CFGSR in which You can specify whether the output freq is multiplied or not. Something similar for Linux would be nice, but since I have used Quisk with my HermesLite rigs for years, it it a good candidate for me.

73 de Heikki (OH2LZI)

Hi Heikk1,
I still keep all that old stuff around.
in one of the subdirectories there.

#./usbsoftrock --help
./usbsoftrock: invalid option -- '-'
usbsoftrock 1.0
usage: ./usbsoftrock [OPTION] COMMAND

OPTION is one or more of
?-a ????????????????????????????Advanced firmware present
????????????????????????????????i.e. let the firmware calculate registers
?-d ????????????????????????????Enter a mode that listens for commands via UDP.
?-i <address> ??????????????????I2C address in DECIMAL (DEFAULT = 85 (0x55))
?-m <multiplier> ???????????????Multiplication factor for frequency (DEFAULT = 4)
?-p <port num> ?????????????????Port to listen for UDP datagrams (DEFAULT = 19004)
?-s <startup frequency MHz> ????Factory programmed startup frequency (DEFAULT = 56.32)
?-v ????????????????????????????Verbose output (fairly useful)
?-vv ???????????????????????????Even more verbose output (debugging)
?-x <calibrated xtall freq MHz> Corrected XTALL frequency of Si570 device calculated
????????????????????????????????through the use of the calibrate command immediately
????????????????????????????????after startup.
COMMAND is one of
?calibrate (may require -s option)
?getfreq
?getregisters
?interactive
?ptt {on|off}
?set bpf {on|off} ??????????????????????(PE0FKO+TF3LJ+Mobo)
?set bpf_addr <band> <filter> ??????????(PE0FKO >= 15.12+Mobo
?set bpf_point <crossover> <f in MHz> ??(PE0FKO+TF3LJ+Mobo)
?set lpf {on|off} ??????????????????????(TF3LJ+Mobo only)
?set lpf_addr <band> <filter> ??????????????????"
?set lpf_point <crossover> <f in MHz> ??????????"
?set freq <frequency in MHz>
?set si570_addr <i2c address in decimal>
?set si570_multiplier [band] <decimal factor> ?(PE0FKO>=15.12+Mobo)
?set startup <frequency in MHz> ????????(PE0FKO+TF3LJ+Mobo)
?set xtall <frequency in MHz> ??????????(PE0FKO+TF3LJ+Mobo)
?status

?where TF3LJ = Lofturs AtMega168 derivative
???????Mobo ?= Mobo 4.3 Project AT90USB162 Firmware
-------------------------------------------------------------------------------
73 ... Sid.

--
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Senior Staff Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks