As of August 2020 the site you are on (wiki.newae.com) is deprecated, and content is now at rtfm.newae.com.

Changes

Jump to: navigation, search

Adding Modules/Parameters

4,765 bytes added, 13:09, 1 May 2018
Changed header levels
==Adding New Modules==
In the new CW software plugin architecture, all plugin modules are scanned during the tool inializationinitialization, so new modules functionalities can be added by just dropping its file inside the files inside its respective folder:
* chipwhisperer/software/chipwhisperer/common/results
* chipwhisperer/software/chipwhisperer/analyzer/preprocessing
* chipwhisperer/software/chipwhisperer/analyzer/scripts
* and some of its the above subfolders.
These paths are checked both inside the tool's root directory (where the tool is installed), and in the Project Folder (default is ~/chipwhisperer_projects), allowing the usage of custom modules without the requirement of being system administer. The CW tools scan these directories looking for classes that inherits from the ''Plugin '' class (a marker interface actually) in each public file module (that do not start doesn't begin with "_"). '''IMPORTANT''': Accessing "Help->List Enabled/Disabled Plugins" in the tool's menu you'll find a list with all modules it tried to load. In case of any problem, you can check in the table the error message and its details. It should be easier to visuallise if you copy and paste the cell cotent to a text editor (example: notepad). These folders usually have a file called basic''base.py '' or _basic''_base.py. These files have '' that contains the base class to all modules plugins in these directories. Ex.:
<pre>
</pre>
==Adding parametersParameters==
Another important thing, is the Parameter architecture. It is Parameters are used to allow easy access and manipulation of all object's main attibutes and actions. All parameters can be accessed statically anywhere in the code throught the Parameter class. It means that if you want to set/get any parameter, you can do it easily adding the follow lines to your code:
<pre>
from chipwhisperer.common.utils.parameter import Parameter
</pre>
The easiest way to add parameters to your class, is to make it ''Parameterized '' (extending this class). It is an abstract class that declares a public interface and implements two manipulation methods to create/get the Parameters parameters and find it. As a general rule, you just need to: * import the ''Parameterized '' class: from chipwhisperer.common.utils.parameter import Parameterized* make your class extend it(no construtor call is needed here since the idea is to use it as an interface to avoid the problems with multiple inheritance - i.e.: the diamont one)
* define a _name and a _description
* register it if it is not readily accessible through a higher parameter hierarchy: self.getParams().register()
* and call self.getParams().addChildren([...]) The getParams() method does four things: * create a new Parameter if it doesn't exist; * create a group called _name; * create a child description parameter with the specified _description label; * return a reference to the parent group parameter. Search is performed using the findParam([fullpath]) method.
The method getParams() whild do four things: create a new Parameter if it doesn't exist; create a group called _name; create a child description parameter with the specified _description; and return a reference to the group parameter. Search in the parameters can be performed using the findParam([fullpath]) method.Each parameter stores the data internally or externally , using a set/get (pair - usefull to retrieve dynamic data). In this case, the @setupSetParam(nameOrPath) decorator should be used in the set method in order to syncronize the GUI when the method is called directly without using the parameter value changesclass.
More information about the Parameterized and the Parameter class can be found in its docstrings.
Basic exempleexample:
<pre>
self.getParams().addChildren([
{'name':'Save Raw Results', 'type':'bool', 'get':self.getEnabled, 'set':self.setEnabled}, # With value saved externally
{'name':'Symbol', 'type':'list', 'values':['o', 's', 't', 'd', '+'], 'value':'o'}, # With value saved internally
])
 
self.findParam("Symbol").setValue('t')
s = self.findParam("Symbol").getValue() # s = 't'
def getEnabled(self):
@setupSetParam("Save Raw Results")
def setEnabled(self, enabled):
self._enabled = enabled</pre> === What to tweak? === ==== acq_patterns ====Has the modules that generate the keys. If you want to generate custom key or plaintext sequences, or read it from a file, this is the place to go. ==== auxiliary ====Usefull if you want to execute something before, during or after the capture. Exemple ([http://newae.com/forum/viewtopic.php?f=7&t=202#p1026 provided by GABRIEL_F]): import logging import time from chipwhisperer.capture.auxiliary._base import AuxiliaryTemplate from chipwhisperer.common.api.CWCoreAPI import CWCoreAPI from chipwhisperer.common.utils import util, timer class SerialBeforeArm(AuxiliaryTemplate):     <nowiki>'''</nowiki>      This auxillary module allows for serial data to be sent to the target     during the capture process i.e., before and after arming the scope     and after the trace has recorded. This enables the ability for the     scope to trigger on serial communication that need to start after a     reset but before the scope is armed and after.          Compare to SimpleSerial send Go Command.          TODO:     Parser to chop up multiple commands sent in single string seperated by     whitespace. Modify to iterate over returned lists.     Uses non-blocking sleep methods poached from ResetCW1173Read.     <br> Gabe 25-NOV-16     <nowiki>'''</nowiki>        _name = "Send Serial During Capture"<br>     def __init__(self):         AuxiliaryTemplate.__init__(self)         self.getParams().addChildren([             {'name':'Pre-Arm Message', 'type':'str', 'key':'prearmmssg', 'value':''},''             {'name':'Post-Arm Message', 'type':'str', 'key':'postarmmssg', 'value':''},''             {'name':'Post-Capture Message', 'type':'str', 'key':'postcapmssg', 'value':''},''             {'name':'Delay (Pre-Message)' , 'type':'int',  'key':'predelay',  'limits':(0, 10E3), 'value':0, 'suffix':' ms'},             {'name':'Delay (Post-Message)', 'type':'int',  'key':'postdelay', 'limits':(0, 10E3), 'value':0, 'suffix':' ms'},             {'name':'Test Reset', 'type':'action', 'action':self.testSend}         ])     def traceArm(self):         """Before arming the scope, send some serial messages and wait"""         string = self.findParam('prearmmssg').getValue()         self.sendSerial(string)     def traceArmPost(self):         """After arming the scope, send some serial message and wait"""         string = self.findParam('postarmmssg').getValue()         self.sendSerial(string)     def traceDone(self):         """After the trace is captured, send some serial messages and wait"""         string = self.findParam('postcapmssg').getValue()         self.sendSerial(string)     def sendSerial(self, string):         """Send a string!"""         if string is None or len(string) == 0:             return         dly = self.findParam('predelay').getValue()         if dly > 0:             self.nonblockingSleep(dly / 1000.0)         CWCoreAPI.getInstance().getTarget().ser.write(string)                  dly = self.findParam('postdelay').getValue()         if dly > 0:             self.nonblockingSleep(dly / 1000.0)     def nonblockingSleep_done(self):         self._sleeping = False     def nonblockingSleep(self, stime):         """Sleep for given number of seconds (~50mS resolution), but don't block GUI while we do it"""         timer.Timer.singleShot(stime * 1000, self.nonblockingSleep_done)         self._sleeping = True         while(self._sleeping):             time.sleep(0.01)             util.updateUI()     def testSend(self, _=None):         self.sendSerial('Hello')

Navigation menu