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Jan M

To brush up a bit my C++ knowledge and out of curiosity I started to dip my toes into the Min-Devkit.

As a starting project I chose to work on a new implementation of an object to connect to the ENTTEC DMX USB Pro, because it has a simple serial API and offers some interesting possibilities like multithreading, concurrency etc. One object I am working on is called [jam.dmxusbpro].

As part of the project I want to allow only one instance of  [jam.dmxusbpro] to be able to open a serial port to an  ENTTEC DMX USB Pro. 

The way implemented this is by creating a separate device manager class - a singleton - that tracks which devices are opened by which instance of  [jam.dmxusbpro] . That works fine between objects off the same class.

As a second step I am creating another object, called  [jam.dmxusbpro~] that allows to control DMX channels with MSP signals.

However, my approach of using a singleton device manager class only works within instances of the same Max object not between  [jam.dmxusbpro] and   [jam.dmxusbpro~].

Is there a way to share data between different Max objects using the Min-DevKit?

PS: I am working on MacOS and am using the POSIX termios API to open the serial ports.

PPS: Min-DevKit is a great addition!! It got me started very fast and is easily accessible for me who's working more in other languages and has a quite basic experience with C and C++.

To brush up a bit my C++ knowledge and out of curiosity I started to dip my toes into the Min-Devkit.

As a starting project I chose to...

min-devkit-sharing-data-between-objects

Min-DevKit sharing data between objects

Connector

i want to prepare my Laptop and GitHub repository for developing c-externals with Max 8.2 SDK, Visual Studio 2022 and CMAKE 3.23.0 for Max 9.0.4. on Windows 10. Therefor i want to clear some points:

I have cloned the max-sdk in my Max 9 Packages Folder like it is described at 

https://github.com/Cycling74/max-sdk/blob/main/README.md

For developing my own c-externals i want to copy and rename existing source code from the 

 folder as a starting Point for modifying the code for my needs. 

After finishing the external I want to push my own c-external Code to my own private GitHub Repository.

But I don't really know how to implement that because the 

Hope you can help me with thesse Questions!

Hi there,

i want to prepare my Laptop and GitHub repository for developing c-externals with Max 8.2 SDK, Visual Studio 2022 and CMAKE...

handling-github-repositories-for-max-sdk-c-externals

Handling GitHub repositories for max-sdk c-externals

I just started working with the min-devkit a little bit and I am running into a weird crash I don't quite understand (see code snippet below).  I am on Sequoia 15.1.1 on a 2023 M3 using Max 8.6.5.

If I send something out an outlet, starting with a string followed by a single number (e.g. float), that works. Anything else seems to cause a crash.

What I am trying to do is add a string before a list of floats so I can use [route] in max to further process the output.

Furthermore, when I use a string followed by atoms 

No matching member function for call to 'push_back'

referring me to c74_min_outlet.h line 282

 // utility: queue an argument of any type for output
    template <typename argument_type>
    void queue_argument(const argument_type& arg) noexcept
    {
        m_accumulated_output.push_back(arg);
    }


 to add a value to the end of it. However, if I look at the type of m_accumulated_output it is of type 

If I go to c74_min_atom.h it clearly states on line 319 that:

// We don't own the array of atoms, so we cannot do these operations:
    // insert
    // erase
    // push_back
    // push_front
    // pop_front
    // pop_back

I might have a fundamental misunderstanding here, but it looks like that if we deal with atoms we can't use 

, but in queue_argument() from c74_min_outlet.h (line 282) we clearly use .push_back() to try to add something to 

So, long story short: what is the correct way of sending something like:

std::vector<float> data = {....};
std::string routing = "data";

to_outlet.send(routing, data);

so in max I can use [route data] to process the output?

Here are the different ways I have tried to use this and the results:

   // Handle "bang" message
    message<> bang{this, "bang", "Outputs the data.",
        MIN_FUNCTION {

            std::vector<float> entry = {7.4f};
            std::vector<float> entries = {1.0f, 2.0f, 3.0f};
            atoms data(entries.size());
            data = to_atoms(entries);

                //use vector directly => crash
            model.send(entries);  // => crash

            //convert vector to atoms => works
            model.send(data);  // ==> works

            model.send(to_atoms(entries));  // ==> works

                //use string with float => works
            model.send("data", 1.45f); // ==> works

            //use string with atoms (single float) => crash
            model.send("data", to_atoms(entry)); // ==> crash

                //use string with float vector => crash
            model.send("data", entries); // ==> crash

                //use string with atoms (multiple floats) => crash
            model.send("data", data);  // ==> crash

            return {};
        }
    };


I just started working with the min-devkit a little bit and I am running into a weird crash I don't quite understand (see code snippet...

min-devkit-outlet-crash-with-prepended-string

min-devkit outlet crash with prepended string

Is there a way to debug issues (for example: get console logs like we do in web browser) on jweb? It doesn't look as easier to find logs on Max Runtime for anything inside of jweb. Anything on this will be appreciated.

Hi there,

Is there a way to debug issues (for example: get console logs like we do in web browser) on jweb? It doesn't look as easier to...

how-to-debug-jweb-issues

How to debug jweb issues?

pdelges

I'm trying to port my old sfmarkers~ external to ARM and just noticed it doesn't work for AIFF files since some Max versions.

I does work with Max8.1.11 but not with 8.3.3 and later (on intel, 64bits).

As far as I still understand my 20+ years old code,  the call to 

 pointer in the _sndfileinfo structure, even if markers are present in the soundfile.

Did something change in  sndfile_info() between Max8.1 and Max8.3?

I'm trying to port my old sfmarkers~ external to ARM and just noticed it doesn't work for AIFF files since some Max versions.

I does work...

sndfileinfo-in-extsndfileh

sndfile_info() in ext_sndfile.h

Kyle Yan

I'm writing my external object in C hoping to receive any message(even with spaces in it) and transfer the message into one string so that I can do data process in C. I have looked at some chapters in MaxAPI  and did some test. Seems max likes to take the message and transfer into atoms which I do not need. I just need the raw data. Can anyone help? Thanks~

receive-message-as-string

Receive Message as String

Joe Kaplan

I've made such great progress on my externals that I'm ready to try some cross platform support! First step, get Min to build on MacOS. I'm very unfamiliar with MacOS ecosystems, so I was hoping the initial steps here would be easy. That doesn't seem to be the case.

I'm on a MacBook Pro, 2020, Apple M1, maxOS Monterey 12.2.1

* Install Xcode from the Appstore. Done. (whew)

* Go to the Package Manager in Max and install Min-Devkit. Done

* Launch Min-Devkit from Package Manager, click Create a Package, press the big button, enter a name.

min.project: A problem occurred trying to create the new package

So... let's try cloning from github, and following the directions 

* Delete the min-devkit folder that Package Manager installed.

git clone https://github.com/Cycling74/min-devkit.git --recursive. 

Dev Forum