[PLUG] com port in guest to usb in host (virtual box)
Denis Heidtmann
denis.heidtmann at gmail.com
Sun Dec 10 00:34:43 UTC 2017
Some progress. I executed "sigrok-cli --driver
mastech-mas345:conn=/dev/ttyUSB0 --samples 10" forgetting that the meter
was not plugged into the adapter--got "sr: serial: Didn't find a valid
packet (read 0 bytes).
No devices found." Plugged in the meter, then got no response, but exactly
10 seconds delay 'till the prompt returned. And the default data rate is
1/sec. So it seems something was listening for the 10 samples. But if the
samples were acquired I do not know where they went. I was expecting they
would appear in the terminal.
Clues?
-Denis
On Wed, Dec 6, 2017 at 11:25 PM, Russell Senior <russell at personaltelco.net>
wrote:
> There is an example on the wiki page:
>
> https://sigrok.org/wiki/MASTECH_MAS345
>
> that says:
>
> sigrok-cli --driver mastech-mas345:conn=/dev/ttyUSB0 --samples 10
>
> I would try that. That might or might not be the right serial device
> (i.e. ttyUSB0)... check dmesg, unplug/replug your cable and check
> again, if necessary.
>
> On Wed, Dec 6, 2017 at 9:14 PM, Denis Heidtmann
> <denis.heidtmann at gmail.com> wrote:
> > I agree completely. I have downloaded sigrok-cli. Now I have to try to
> > understand how to use it. (I feel a bit overwhelmed.)
> > Where do I put the driver? Is output/input with respect to the external
> > device or the software? I assume the device, judging by the longer list
> of
> > output formats. What is the protocol? Do I need to know, or will the
> > driver decide?
> >
> > sigrok-cli -V
> > sigrok-cli 0.5.0
> >
> > Using libsigrok 0.3.0 (lib version 2:0:0).
> > Using libsigrokdecode 0.3.0 (lib version 2:0:0).
> >
> > Supported hardware drivers:
> > .
> > .
> > .
> > mastech-mas345 MASTECH MAS345
> > .
> > .
> > .
> > Supported input formats:
> > binary Raw binary
> > chronovu-la8 ChronoVu LA8
> > csv Comma-separated values (CSV)
> > vcd Value Change Dump
> > wav WAV file
> >
> > Supported output formats:
> > analog Analog data
> > ascii ASCII
> > binary Raw binary
> > bits Bits
> > chronovu-la8 ChronoVu LA8
> > csv Comma-separated values (CSV)
> > gnuplot Gnuplot
> > hex Hexadecimal
> > ols OpenBench Logic Sniffer
> > vcd Value Change Dump (VCD)
> >
> > Supported protocol decoders:
> > avr_isp AVR In-System Programming
> > can Controller Area Network
> > dcf77 DCF77 time protocol
> > ds1307 Dallas DS1307
> > edid Extended Display Identification Data
> > guess_bitrate Guess bitrate/baudrate
> > i2c Inter-Integrated Circuit
> > i2cdemux I²C demultiplexer
> > i2cfilter I²C filter
> > i2s Integrated Interchip Sound
> > ir_nec IR NEC
> > ir_rc5 IR RC-5
> > jtag Joint Test Action Group (IEEE 1149.1)
> > jtag_stm32 Joint Test Action Group / ST STM32
> > lm75 National LM75
> > lpc Low-Pin-Count
> > maxim_ds28ea00 Maxim DS28EA00 1-Wire digital thermometer
> > midi Musical Instrument Digital Interface
> > mlx90614 Melexis MLX90614
> > mx25lxx05d Macronix MX25Lxx05D
> > mxc6225xu MEMSIC MXC6225XU
> > nunchuk Nintendo Wii Nunchuk
> > onewire_link 1-Wire serial communication bus (link layer)
> > onewire_network 1-Wire serial communication bus (network layer)
> > pan1321 Panasonic PAN1321
> > parallel Parallel sync bus
> > rgb_led_spi RGB LED string decoder (SPI)
> > rtc8564 Epson RTC-8564 JE/NB
> > sdcard_spi Secure Digital card (SPI mode)
> > spi Serial Peripheral Interface
> > tlc5620 Texas Instruments TLC5620
> > uart Universal Asynchronous Receiver/Transmitter
> > usb_packet Universal Serial Bus (LS/FS) packet
> > usb_signalling Universal Serial Bus (LS/FS) signalling
> > xfp 10 Gigabit Small Form Factor Pluggable Module
> (XFP)
> > z80 Zilog Z80 CPU
> >
> >
> > On Wed, Dec 6, 2017 at 3:17 PM, Russell Senior <
> russell at personaltelco.net>
> > wrote:
> >
> >> The sigrok route is probably a better investment of your time than a
> >> vendor-software horror show, imho.
> >>
> >> On Wed, Dec 6, 2017 at 3:02 PM, Denis Heidtmann
> >> <denis.heidtmann at gmail.com> wrote:
> >> > here is the link:
> >> >
> >> > https://sigrok.org/wiki/Multimeter_ICs#Metex_14-byte_ASCII
> >> >
> >> > I would need to study it and educate myself on how to make use of it.
> >> >
> >> > -Denis
> >> >
> >> > On Wed, Dec 6, 2017 at 2:29 PM, Denis Heidtmann <
> >> denis.heidtmann at gmail.com>
> >> > wrote:
> >> >
> >> >> I have found this:
> >> >> Protocol
> >> >>
> >> >> The protocol is (partially) documented in the vendor software's
> "Help"
> >> >> window (seems to apply to MAS343, MAS344, and MAS345; the M9803R
> >> protocol
> >> >> is different).
> >> >>
> >> >> See Multimeter_ICs#Metex_14-byte_ASCII for the DMM IC protocol.
> >> >>
> >> >> I looked in the software's help window, but with the sw I have there
> is
> >> no
> >> >> discussion of protocol. Maybe the note above is referring to other
> >> >> software. The MAS344 is not a current instrument.
> >> >>
> >> >>
> >> >> On Wed, Dec 6, 2017 at 2:15 PM, Russell Senior <
> >> russell at personaltelco.net>
> >> >> wrote:
> >> >>
> >> >>> Have you googled at all about the protocol? You might be able to
> just
> >> >>> talk ASCII at it from Linux and get what you need.
> >> >>>
> >> >>> On Wed, Dec 6, 2017 at 1:22 PM, Denis Heidtmann
> >> >>> <denis.heidtmann at gmail.com> wrote:
> >> >>> > I want to use a DMM with a serial connection. The sw for the DMM
> is
> >> for
> >> >>> > windows. It runs under Win2k (guest) on the desktop which has a
> >> serial
> >> >>> > port. Is it possible to get it to run under Win2k (guest) on the
> >> >>> laptop
> >> >>> > which does not have a serial port? I purchased a Sabrent usb to
> >> serial
> >> >>> > adapter that I hoped to use for this.
> >> >>> >
> >> >>> > I expect the problem is that I cannot get VB to pass the virtual
> com
> >> >>> port
> >> >>> > data from the guest to the usb port in the host (ubuntu). If
> this is
> >> >>> > impossible or too difficult to be practical I will pursue linux sw
> >> for
> >> >>> the
> >> >>> > DMM, although I may run into a similar problem. The DMM is
> Mastech
> >> >>> MAS-344.
> >> >>> >
> >> >>> > Thanks for any clues.
> >> >>> >
> >> >>> > -Denis
> >> >>> > _______________________________________________
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> >> >>
> >> >>
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