MPR121 capacitive touch and Pure Data

Of course!
But Pure data still sees them as one

They bang together
When I touch the 0 of MPR121 both values get printed - when I touch the 1 of MPR121 it's the same.
I should be able to pour sensorValue into an array (but a pd array is not the same as an array in C..)

dywen

> [r sensorValue]
> |
> [print]

---> Did not give a list

what is your C++ code at this point?
Are you sending this?

	        libpd_start_message(8);
                for(int n = 0; n < 8; ++n)
                    libpd_add_float(sensorValue[n]);
		libpd_finish_list("sensorValue");

IMPORTANT: are you sending something else?

yep, it was in setup, not render.
(I had a - bad - reason for that)

Looking better!

Now it needs serious debouncing - I think
Touching once, briefly, gives 100 bangs (or more - who knows)

----> Too many messages have been printed to the console too quickly. Reduce your printing frequency

ok, better - except that sensor 0 - co-bangs with all sensors
(When I touch 1, 3 or 6 - 0 prints bang as well)

There must be another sensorValue disrupting the flow - I tried to make this render.cpp "cleaner" but I got tons of error messages (and bela stopping)

If someone feels like taking out the midi stuff of this render.cpp and finding two renderings of sensorValue - I would appreciate that
https://framabin.org/p/?5d16d77f039d8958#QYF2tXlzMwCrGdw0525a0wGyhfVgd5f2zpvurT7Hr3E=

pfewww
I'm an autodidact - thanks for your patience Guilormo - it was truly great - I have learnt a lot!

hey,

I have a friend who's a crack at C and he had a look at the code of the render.cpp I had
Here's an outline what he proposed:
in the original code, libpd start message is at the beginning of render:

void render(BelaContext *context, void *userData)
{
	int num;
libpd_start_message(8); //get data from all 8 MPR121 pins
	for(int n = 0; n < 8; ++n)
    	libpd_add_float(sensorValue[n]);
    	
libpd_finish_list("sensorValue");
libpd_finish_message("pd", "dsp");

His proposal:
"Try to combine the 'float' and add_float from with the code in render, and put it at the VERY END of render() but inside render, remove the for loop from readMPR121."

    libpd_start_message(8); //get data from all 8 MPR121 pins
    for(int n = 0; n < 8; ++n){
        libpd_add_float(sensorValue[n]);
    }
    libpd_finish_list("sensorValue");
    libpd_finish_message("pd", "dsp");

   libpd_start_message(8); //get data from all 8 MPR121 pins
    for(int n = 0; n < 8; ++n){
        libpd_add_float((float)n);
    }
    libpd_finish_list("sensorIndex");
    libpd_finish_message("pd", "dsp");

OLD read at the end of render.cpp:

void readMPR121(void*)
{
	for(int i = 0; i < NUM_TOUCH_PINS; i++) {
		sensorValue[i] = -(mpr121.filteredData(i) - mpr121.baselineData(i));
		sensorValue[i] -= threshold;
		if(sensorValue[i] < 0)
			sensorValue[i] = 0;
		libpd_float("sensorIndex", (float)i);
		//rt_printf("%d ", sensorIndex[i]); //error: use of undeclared identifier 'sensorIndex'
		libpd_float("sensorValue", (float)sensorValue[i]);
#ifdef DEBUG_MPR121
		rt_printf("%d ", sensorValue[i]); //prints the values of the sensor when DEBUG_MPR121 is define at beginning of programme
#endif
	}
#ifdef DEBUG_MPR121
	rt_printf("\n");
#endif
	
// You can use this to read binary on/off touch state more easily
//rt_printf("Touched: %x\n", mpr121.touched());

-----> NEW read:

void readMPR121(void*){
    for(int i = 0; i < NUM_TOUCH_PINS; i++) {
        sensorValue[i] = -(mpr121.filteredData(i) - mpr121.baselineData(i));
        sensorValue[i] -= threshold;
        if(sensorValue[i] < 0)
            sensorValue[i] = 0;
#ifdef DEBUG_MPR121
        rt_printf("%d ", sensorValue[i]); //prints the values of the sensor when DEBUG_MPR121 is define at beginning of programme
#endif
    }
#ifdef DEBUG_MPR121
    rt_printf("\n");
#endif
   

// You can use this to read binary on/off touch state more easily
//rt_printf("Touched: %x\n", mpr121.touched());
}

It WORKS!

Also with the little piece of handwoven e-textile (80% polyester, 20%stainless steel)

(image is green because of curtains - heatwave)

Latest render.cpp is here - it desperately needs a clean-up.
https://framabin.org/p/?79ecd118364dce6a#PgFmcFomCItZkIJRkx5azj8hnZuxZs4f76OEgMIOefk=
(you need javascript to decrypt)

End of August - beginning of September I will write about this in full detail and post the project.

giuliomoro dywen remove the for loop from readMPR121."

hmm:

giuliomoro proper way is to move the message sending to the render() function.

I guess that "move" here was the key word, also

Yes, indeed
(I removed the old code and put in the new one ;-)

giuliomoro IMPORTANT: are you sending something else?

I meant exactly: are you still sending to it from the other thread (that is, readMPR121()).

Honestly, I don't know
With the code on Midi - this render.cpp is too hard to read for me (I'm a linguist/artist - who did a quarter of a moog on coding - time money and parenthood limiting me at this moment from doing more)

dywen "Try to combine the 'float' and add_float from with the code in render, a

that would not work (libpd_float() and libpd_add_float() cannot be combined), and in fact it is not what you have done.

dywen

libpd_start_message(8); //get data from all 8 MPR121 pins
for(int n = 0; n < 8; ++n){
libpd_add_float(sensorValue[n]);
}
libpd_finish_list("sensorValue");
libpd_finish_message("pd", "dsp");
libpd_start_message(8); //get data from all 8 MPR121 pins
for(int n = 0; n < 8; ++n){
libpd_add_float((float)n);
}
libpd_finish_list("sensorIndex");
libpd_finish_message("pd", "dsp");if("undefined"!==typeof hljs)hljs.ha();else if("undefined"===typeof hljsLoading){hljsLoading=1;var a=document.getElementsByTagName("head")[0],e=document.createElement("link");e.type="text/css";e.rel="stylesheet";e.href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/styles/default.min.css";a.appendChild(e);e=document.createElement("script");e.type="text/javascript";e.onload=function(){var d={},f=0;hljs.hb=function(b){b.removeAttribute("data-hljs");var c=b.innerHTML;c in d?b.innerHTML=d[c]7<++f&&(d={},f=0),hljs.highlightBlock(b.firstChild),d[c]=b.innerHTML)};hljs.ha=function(){for(var b=document.querySelectorAll("pre[data-hljs]"),c=b.length;0<chljs.hb(b.item(--c))};hljs._ha()};e.async=!0;e.src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/highlight.min.js";a.appendChild(e)}

You don't really need to send the sensorIndex at this point, you can just assume that the elements of the list are in order. So you don't need the second message.

libpd_finish_message("pd", "dsp");if("undefined"!==typeof hljs)hljs.ha();else if("undefined"===typeof hljsLoading){hljsLoading=1;var a=document.getElementsByTagName("head")[0],e=document.createElement("link");e.type="text/css";e.rel="stylesheet";e.href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/styles/default.min.css";a.appendChild(e);e=document.createElement("script");e.type="text/javascript";e.onload=function(){var d={},f=0;hljs.hb=function(b){b.removeAttribute("data-hljs");var c=b.innerHTML;c in d?b.innerHTML=d[c]7<++f&&(d={},f=0),hljs.highlightBlock(b.firstChild),d[c]=b.innerHTML)};hljs.ha=function(){for(var b=document.querySelectorAll("pre[data-hljs]"),c=b.length;0<chljs.hb(b.item(--c))};hljs._ha()};e.async=!0;e.src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/highlight.min.js";a.appendChild(e)}
This line does nothing and should be removed.

So, after removing this line and the useless "sensorIndex" message, you end up with exactly this:

giuliomoro libpd_start_message(8);
for(int n = 0; n < 8; ++n)
libpd_add_float(sensorValue[n]);
libpd_finish_list("sensorValue");

which I sent you a few days ago.

True, but I did not know what to remove :-/
So I was conservative on deletion. I am over my head on this job (I never estimated it would become so complex to be able to have several audio files playing simultaneously)

dywen d put it at the VERY END of render()

This would work, but it adds one block of latency with respect to having it at the beginning of render().

Ok! nose back to the grind stone!
By the way I really like the responsiveness & console feedback of the Bela Ide whilst editing render.cpp