<h2>Tuxgraphics Digital DC Power Supply Unit</h2>
+Software for version the version 3 hardware.
<pre>
-Compile the software and program the microcontroller:
+Compiling the software and programming
+the microcontroller (atmega8 or atmega8a):
+==========================================
1) edit and adapt the file hardware_settings.h
(calibration and selection of the right hardware type).
+ You can as well just copy one of the pre-set versions
+ on top of hardware_settings.h.
+ Example: cp hardware_settings.h-22V hardware_settings.h
2) load and compile:
make
This should result in the following settings:
-avrdude: Device signature = 0x1e9307
-avrdude: safemode: lfuse reads as A4
-avrdude: safemode: hfuse reads as D9
+ Device signature = 0x1e9307
+ lfuse reads as A4
+ hfuse reads as D9
Fuse Low Byte details
CKSEL1 Select Clock source = 0
CKSEL0 Select Clock source = 0
-The make fuse needs to be done only once
-unless you change the Atmega8 chip. make/make load
+The "make fuse" needs to be done only once
+unless you change the Atmega8/Atmega8a chip. make/make load
need to be repeated everytime you change something
in the software (e.g update of hardware_settings.h).
The poweresupply must be powered up during programming
-but nothing should be connected to the output. Make
+but nothing should be connected on the output. Make
sure that you do not accidently press any button
during the programming (loading the software into the uC).
case you do not need to use this batch file.
winsetfuse.bat -- set fuse bytes using avrdude, may also use
- some other means of loading the softare. In that
+ some other means of changing the fuse bytes. In that
case you do not need to use this batch file.
Calibration
All of the control logic is implemented in software. This
saves a lot of parts compared to conventional lab-power
-supplies. This means it is cheaper, easier to build and
+supplies and means it is cheaper, easier to build and
offers more functionallity.
Note however that this means also that the short circuit
-protection is implemented in software. So be careful when
+protection is implemented in software. Be careful when
you change something in the software. If the microcontroller
is not running properly due to a software fault then there
might not be any short circuit protection.
-
The software is prepared for 2 versions:
- 0-22V 0-2.5A
- 0-30V 0-2A
range than any of the two version then you can just
modify the file hardware_settings.h.
+Remote control from your PC
+===========================
The unit can be controlled remotely from a computer using
a USB serial interface. An add-on card is available from
http://shop.tuxgraphics.org which offers galvanic separation
port : Virtual com port (e.g /dev/ttyUSB1 or /dev/ttyUSB0
or COM5 under windows or ... whatever port the
- virtual com-port maps to)
- Under linux or Mac you can use the command dmesg
- after you have plugged in the USB cable to see to
- which com-port/device the new virtual com port maps to.
-
+ virtual com-port maps to)
+ Under linux or Mac you can use the command dmesg
+ after you have plugged in the USB cable to see to
+ which com-port/device the new virtual com port maps to.
+
baudrate : 9600
parity : none
flowcontrol: none
</pre>
<br>
<img src=screenshot-cmd-interface.gif>
-<br>
-<br>
-At shop.tuxgraphics.org you can get an optically insulated
-USB to serial interface add-on kit such that your computer
-is galvanically separated from the power supply but still able
-to give commands. This enables you as well to use two power supplies
-to provide positive and negative supply voltages for e.g. an operational amplifier.
-
<br>
<br>
<pre>
+Controling the power supply with scriptable commands
+====================================================
You can control the digital power supply by commands. A number
of commands are provided for this purpose. They are at the moment
-available for Linux and Mac:
+available for Linux, Mac and Windows:
-ddcp-script-ttyinit - initialize the COM port
+ddcp-script-ttyinit - initialize the COM port (run this once at
+ at the beginning)
ddcp-script-getval - get current values (same as you see on the LCD)
ddcp-script-setval - send a command to the power supply
-ddcp-script-example.sh - an example shell script showing how to use
+ddcp-script-example.sh - an example unix shell script showing how to use
the above commands
+To compile the ddcp-script commands under linux and on the mac
+use the command:
+
+make ddcp-script
+
+The windows versions of those commands are available in the
+sub-directory "ddcp-script-windows". The windows versions
+are compiled in that sub-directory with the command:
+
+make
+
+Pre-compiled binaries are available for winXP.
+
-------------------------------------------------------------------
Copyright: GPL V2
Author: Guido Socher
-------------------------------------------------------------------
Change history:
digitaldcpower-0.6.0 -- 2010-05-22 first version of the new power V3.
- This version is made for a new type of hardware
- and will not run on any previous hardware version.
+ This version is made for a new type of hardware
+ and will not run on any previous hardware version.
digitaldcpower-0.6.1 -- 2010-06-06 Number conversion to display string
- improved.
- -- Basic uart interface prompt, no remote control yet
+ improved.
+ Basic uart interface prompt, no remote control yet
digitaldcpower-0.6.2 -- 2010-06-26 Full UART command interface
+
digitaldcpower-0.6.3 -- 2010-07-03 Accelerate UART command polling to
- not loose characters when copied/pasted at high speed.
- Line editing with backspace if terminal supports it.
- Set BOD (brown out detector enable) fuse.
- Script interface (ddcp-script)
-
+ not loose characters when copied/pasted at high speed.
+ Line editing with backspace if terminal supports it.
+ Set BOD (brown out detector enable) fuse.
+ Script interface (ddcp-script)
+digitaldcpower-0.6.4 -- 2010-07-11 added ddcp-script interface
+ commands for windows.
-------------------------------------------------------------------
+ vim: set sw=8 ts=8 si et :
</pre>
projects / digitaldcpower / blobdiff