Comments (10)
bernhard-thiele
commented on July 25, 2024
Don't understand it either. Seems to be a wrong error message by Dymola. However, stating that a Real signal is discrete is optional. So it should be no problem to just go without the "discrete" prefix.
from modelica_devicedrivers.
tbeu
commented on July 25, 2024
@HansOlsson I add you here to have a look at the translation error and if the behavior is expected to be right in general. For easy reproduction add in file Modelica_DeviceDrivers/Blocks/Interfaces.mo discrete to variable dummy of the two connectors.
Hopefully you can give some feedback. Thank you for your collaboration.
from modelica_devicedrivers.
HansOlsson
commented on July 25, 2024
The error message is correct, and stating that a Real signal is discrete is not optional.
Discrete for a real signal does not say that it is discrete - it states that it is discrete and assigned in a when-loop.
4.4.4 Component Variability Prefixes discrete, parameter, constant
...
If a Real variable is declared with the prefix discrete it must in a simulation model be assigned in a when-clause, either by an assignment or an equation. The variable assigned in a when-clause may not be defined in a sub-component of model or block specialized class. [This is to keep the property of balanced models.]
A Real variable assigned in a when-clause is a discrete-time variable, even though it was not declared with the prefix discrete. A Real variable not assigned in any when-clause and without any type prefix is a continuous-time variable.
from modelica_devicedrivers.
tbeu
commented on July 25, 2024
Thus to make it right for the connectors the connect equations should be in a when-clause?
from modelica_devicedrivers.
tbeu
commented on July 25, 2024
Or can we have the discrete only at the PackageOut connector?
from modelica_devicedrivers.
HansOlsson
commented on July 25, 2024
Cannot put connect-equations in when-clauses:
9.3 Restrictions of Connections and Connectors
The connect-equations (and the special functions for overdetermined connectors) may only be used in equations and may not be used inside if-equations with non-parametric condition, or in when-equations.
I haven't checked if only having discrete at outputs would be correct if assigned in the models.
However, having 'discrete' at the Interface-level for outputs means that you cannot build hierarchical models using the interface, which seems like a big restriction.
from modelica_devicedrivers.
tbeu
commented on July 25, 2024
Thanks, Hans!
The reason I asked and I applied this discrete patch is the following: In new SimulationX 3.7 this (and more) example models give now translation warnings. It is likely that the messages are wrong but I tried to get rid of them which turned out to be not successful.
Warning In Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_UDP
The structure of the initial equation system is singular.Equations are missing.
getInteger.pkgIn.dummy:
| getFloat.pkgOut.dummy[1] t--> getFloat.pkgOut.dummy[1]=getInteger.pkgIn.dummy;
There is no unique solution for the variable getInteger.pkgIn.dummy. If applicable, add a fixed initial value, initial equation or initial assignment.
There is no start attribute of state getInteger.pkgIn.dummy. It is set to 0.
from modelica_devicedrivers.
tbeu
commented on July 25, 2024
The follwing patches that set pkgIn.dummy.start and pkgIn.dummy.fixed attributes seem to resolve these warnings.
Modelica_DeviceDrivers/Blocks/Packaging/SerialPackager.mo | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Modelica_DeviceDrivers/Blocks/Packaging/SerialPackager.mo b/Modelica_DeviceDrivers/Blocks/Packaging/SerialPackager.mo
index 36a4928..501bd9d 100644
--- a/Modelica_DeviceDrivers/Blocks/Packaging/SerialPackager.mo
+++ b/Modelica_DeviceDrivers/Blocks/Packaging/SerialPackager.mo
@@ -6,7 +6,7 @@ package SerialPackager "Blocks for constructing packages"
partial block PartialSerialPackager
parameter Integer nu(min=0,max=1) = 0 "Output connector size"
annotation(Dialog(connectorSizing=true), HideResult=true);
- Interfaces.PackageIn pkgIn annotation (Placement(transformation(
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true)) annotation (Placement(transformation(
extent={{-20,-20},{20,20}},
rotation=180,
origin={0,108}))); Modelica_DeviceDrivers/Blocks/Communication.mo | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/Modelica_DeviceDrivers/Blocks/Communication.mo b/Modelica_DeviceDrivers/Blocks/Communication.mo
index 3528517..7aa0631 100644
--- a/Modelica_DeviceDrivers/Blocks/Communication.mo
+++ b/Modelica_DeviceDrivers/Blocks/Communication.mo
@@ -63,7 +63,7 @@ provided by the parameter <b>memoryID</b>. If the shared memory partition does n
"Buffer size of shared memory partition in bytes (if not deduced automatically)"
annotation(Dialog(enable=not autoBufferSize, group="Shared memory partition"));
parameter String memoryID="sharedMemory" "ID of the shared memory buffer" annotation(Dialog(group="Shared memory partition"));
- Interfaces.PackageIn pkgIn annotation (Placement(
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true)) annotation (Placement(
transformation(
extent={{-20,20},{20,-20}},
rotation=90,
@@ -157,7 +157,7 @@ provided by the parameter <b>memoryID</b>. If the shared memory partition does n
annotation (Dialog(group="Outgoing data"));
parameter Integer port_send=10002 "Target port of the receiving UDP server"
annotation (Dialog(group="Outgoing data"));
- Interfaces.PackageIn pkgIn annotation (Placement(transformation(
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true)) annotation (Placement(transformation(
extent={{-20,-20},{20,20}},
rotation=270,
origin={-108,0})));
@@ -270,7 +270,7 @@ See <a href=\"modelica://Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackag
"set parity (0 - no parity, 1 - even, 2 - odd)"
annotation (Dialog(group="Outgoing data"));
- Modelica_DeviceDrivers.Blocks.Interfaces.PackageIn pkgIn annotation (
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true)) annotation (
Placement(transformation(
extent={{-20,-20},{20,20}},
rotation=270,
@@ -323,7 +323,7 @@ See <a href=\"modelica://Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackag
"Buffer size of message data in bytes." annotation(Dialog(group="Outgoing data"));
parameter Integer inputBufferSize=16*1024
"Buffer size of message data in bytes." annotation(Dialog(group="Incoming data"));
- Interfaces.PackageIn pkgIn annotation (Placement(transformation(
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true)) annotation (Placement(transformation(
extent={{-20,-20},{20,20}},
rotation=270,
origin={-108,0})));
@@ -472,7 +472,7 @@ See <a href=\"modelica://Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackag
parameter Integer ident(min=0) "Identifier of CAN message (CAN Id)";
parameter Integer dlc(min=0,max=8) = 8
"Data length code (payload of data in bytes, max=8)";
- Modelica_DeviceDrivers.Blocks.Interfaces.PackageIn pkgIn
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true))
annotation (Placement(transformation(extent={{-20,-128},{20,-88}})));
protected
Integer objectNumber;
@@ -703,7 +703,7 @@ See <a href=\"modelica://Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackag
parameter Integer can_id(min=0) "Identifier of CAN message (CAN Id)";
parameter Integer can_dlc(min=0,max=8) = 8
"Data length code (payload of data in bytes, max=8)";
- Modelica_DeviceDrivers.Blocks.Interfaces.PackageIn pkgIn
+ Interfaces.PackageIn pkgIn(dummy(start = 0, fixed = true))
annotation (Placement(transformation(extent={{-20,-20},{20,20}},
rotation=-90,
origin={-108,0})));from modelica_devicedrivers.
tbeu
commented on July 25, 2024
OK, this is now a diferent issue about the not fully specified initial system.
from modelica_devicedrivers.
HansOlsson
commented on July 25, 2024
Adding fixed start-values for inputs does not make sense to me; I noticed there is a different issue about the initial part and will look at that.
from modelica_devicedrivers.
Related Issues (20)
- Communication troubles after several seconds HOT 3
- A spurious byte sent at the end of simulation HOT 6
- A difficulty about serial port communication (this is not a bug report) HOT 1
- Examples in M_DD make use of deprecated block SynchronizeRealtime HOT 1
- RealtimeSynchronize block "clock_nanosleep" error on Linux
- How to handle a telnet-like protocol? HOT 1
- Error in Linux MDD_getTimeMS(...)
- MDDUDPSocket.h: socket failed with error: 10022 HOT 6
- ModelicaUtilities.c includes ModelicaUtilities.h in wrong directory HOT 1
- Serial port change port settings (number of data bits) HOT 10
- Compilation process failed in TestSerialPackager_UDP HOT 1
- Cosimulation using TCP/IP HOT 5
- TCP/IP with OpenModelica? HOT 4
- Struggling with serial port string communication HOT 11
- Not able to understand how to generate generic microcontroller code using the package ? HOT 2
- Component config of variability parameter has binding 'socketCANConfig1[<txMessage1, txMessage1>]' of higher variability continuous. HOT 1
- CLOCK_MONOTONIC not available in -std=c89 HOT 7
- MQTT example cannot compile into C HOT 3
- Support for OPCUA client HOT 4
- Can it generate atomic code like embedded coder in matlab ? HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from modelica_devicedrivers.