Instrument control package: Difference between revisions

Jump to navigation Jump to search
m
→‎Windows (cygwin): Avoid deprecated "source" tags.
m (→‎Windows (cygwin): Avoid deprecated "source" tags.)
(15 intermediate revisions by 6 users not shown)
Line 17: Line 17:
! i2c
! i2c
| bgcolor="green" | v0.1.0 || -                        || -                        || bgcolor="skyblue" | stalled || -  
| bgcolor="green" | v0.1.0 || -                        || -                        || bgcolor="skyblue" | stalled || -  
|-
! spi
| bgcolor="green" | v0.6.0 || -                        || -                        || -                          || -
|-
|-
! TCP
! TCP
Line 40: Line 43:
{{Code|Check for interface support|<syntaxhighlight lang="octave" style="font-size:13px">
{{Code|Check for interface support|<syntaxhighlight lang="octave" style="font-size:13px">
pkg load instrument-control
pkg load instrument-control
supportedinterfaces = instrhwinfo().SupportedInterfaces


if (exist("serial") == 3)
if ! isempty(strfind (supportedinterfaces , "serial"))
     disp("Serial: Supported")
     disp("Serial: Supported")
else
else
Line 48: Line 52:


#similarly with:
#similarly with:
#exist("parallel") == 3
# ! isempty(strfind (supportedinterfaces , "parallel"))
#exist("i2c") == 3
# ! isempty(strfind (supportedinterfaces , "i2c"))
</syntaxhighlight>}}
</syntaxhighlight>}}


Line 63: Line 67:
To be able to use GPIB on windows, the linux-gpib library needs to be 'faked'. This can be done by copying the following script and run it in a bash-terminal.
To be able to use GPIB on windows, the linux-gpib library needs to be 'faked'. This can be done by copying the following script and run it in a bash-terminal.


<source lang="bash">
<syntaxhighlight lang="bash">
#!/bin/bash
#!/bin/bash
# fake_linux_gpib.sh, Kire Pûdsje, Dec 2017
# fake_linux_gpib.sh, Kire Pûdsje, Dec 2017
Line 73: Line 77:


# set the base for includes and libraries on your system
# set the base for includes and libraries on your system
# it is usally /usr, but on newer windows installs of octave, it will be
# it is usually /usr, but on newer windows installs of octave, it will be
# /mingw64
# /mingw64
INSTALL_BASE=/usr
INSTALL_BASE=/usr
Line 99: Line 103:
#cleanup  
#cleanup  
rm -f ${NI_DEF_FILE}
rm -f ${NI_DEF_FILE}
</source>
</syntaxhighlight>


== MacOS ==
== MacOS ==
Line 106: Line 110:


If rpcgen cannot be build from source, the following error might be obtained:
If rpcgen cannot be build from source, the following error might be obtained:
<syntaxhighlight style="font-size:13px">
<syntaxhighlight lang="text"  style="font-size:13px">
pkg: error running `make' for the instrument-control package.
pkg: error running `make' for the instrument-control package.
error: called from
error: called from
Line 360: Line 364:


== i2c ==
== i2c ==
i2c
Example with a Si7021 i2c breakout board (https://www.sparkfun.com/products/1376) connected to a i2c master interface.
 
To work out the devices available (assuming i2ctools are installed) run the i2cdetect command from a terminal window.
 
<syntaxhighlight lang="bash" style="font-size:13px">
$ i2cdetect -l
i2c-1  i2c            i2c-ch341-usb at bus 002 device 008    I2C adapter
i2c-0  unknown        SMBus I801 adapter at 4000              N/
</syntaxhighlight>
 
In the example case the temperature sensor is connected to the i2c-ch341-usb device, and it is assumed the user has sufficient permissions to access the device.
 
According to the datasheet, the temperature device uses address 0x40, so create a i2c device using the linux device and address:
 
<syntaxhighlight lang="octave" style="font-size:13px">
i2cdev = i2c("/dev/i2c-1", 0x40)
</syntaxhighlight>
 
To read  the temperature, register 0xF3 must be addressed and read (2 bytes of data):
 
<syntaxhighlight lang="octave" style="font-size:13px">
TEMP_MEASURE_NOHOLD = hex2dec("F3");
fwrite (i2cdev, uint8([TEMP_MEASURE_NOHOLD]));
pause (0.02);
data = fread (i2cdev, 3);
</syntaxhighlight>
 
The data must be converted to a deg K value by making  16 bit number of the value and masking out unused bits.
 
<syntaxhighlight lang="octave" style="font-size:13px">
value = uint16(data(1))*256 + uint16(data(2));
value = bitand (value, hex2dec("FFFC"));
temp_Code = double(value);
</syntaxhighlight>
 
Now convert the temperature to degrees C and display:
 
<syntaxhighlight lang="octave" style="font-size:13px">
C = (175.72*temp_Code/65536)-46.85;
printf ("temperature read %f C\n", C);
</syntaxhighlight>


== TCP ==
== TCP ==
Line 455: Line 499:
* Every read or write command opens and closes a new gpib session, since the linux-gpib session pointer is only valid for single command.
* Every read or write command opens and closes a new gpib session, since the linux-gpib session pointer is only valid for single command.


[[Category:Octave Forge]][[Category:Packages]]
== SPI ==
=== Configuring interface ===
SPI currently only works in linux.
 
instrhwinfo will display the avilable devices in the system
 
{{Code|SPI example|<syntaxhighlight lang="octave" style="font-size:13px">
instrhwinfo("spi")
</syntaxhighlight>
}}
 
You will need read/write permissions to the device used.
 
=== Example: basic use ===
Example opening an performing IO on a device /dev/spidev0.0.
{{Code|SPI example|<syntaxhighlight lang="octave" style="font-size:13px">
# open device
spidev = spi("/dev/spidev0.0", 'clockpolarity', 'idlehigh', 'clockphase', 'firstedge')
 
# I/O to device
 
data = writeAndRead (spidev, uint8([0x01 0x00]))
 
# close the device
clear spidev
</syntaxhighlight>
}}
 
 
[[Category:Octave Forge]]

Navigation menu