Issue integrating the u8g2 library in to project

giuliomoro

the thing is that when you provide your own main() function, then all the assumptions about a "Bela program" fall apart. The O2O program you started from does no audio processing and is meant to run alongside a "Bela program", for this reason it provides its own main() function.

In your case what you should do is remove the main() function and move its content up to oscReceiver.setup(gLocalPort, parseMessage); to setup() and also provide a render() and cleanup() functions (even if temporarily empty/unused) just like any other Bela C++ program.
If you want to update the display with readings from Trill, then the lines:

    while(!gStop)
    {
        u8g2.clearBuffer();
        positionXsensor = gTouchPosition[0];
        positionYsensor = gTouchPosition[1];

        //drawSensorInputAsBar(u8g2, positionXsensor);
        u8g2.drawBox(positionXsensor, 0, 15, 39);
        u8g2.sendBuffer();
        usleep(10000);
    }

are best run in a dedicated thread (can be created with the usual AuxiliaryTask API).

aaronBelaIssue

Hi Giulimoro,

I have implemented this approach and all seems to be working with example values thank you very much!!

However, something strange has happened to my two touch sensors (one bar one craft). Both are detected but give 0 readings no matter what now. I have tested with the two connectors provided, through a breadboard and without a breadboard, and with the OLED and without. The OLED display still works fine on the i2c bus that the sensor was using too. They return zero values on all of the trill examples also. This was not the case previously. Is there some kind of hardware reset i could try or should I just order a new sensor?

Running i2cdetect -y -r 1 works as normal also and detects them with no issue, I have not changed any of the settings at all.

Thanks very much for all of your help

giuliomoro

aaronBelaIssue They return zero values on all of the trill examples al

Really? Try opening Trill/general-settings with the CRAFT connected, open the Gui, set the mode to raw, do you see all zeros?

giuliomoro

As the sensors are being detected, then it may be that some settings have been left on them and need power cycling. Try power cycling them: remove the VCC pin and reconnect it.

aaronBelaIssue

Still no luck sadly, tried some different VCC connection points too no change

SensorDetails gives this unsure if this is standard

Device type: Bar (1)
Address: 0x20
Firmware version: 3

aaronBelaIssue

Ahhh really sorry for some reason I misspoke. I have one Bar one square. Unsure why I said I had a craft. Completely on me.

But yeah still zeroes coming up when testing any of the bar/Square examples

giuliomoro

Try the general-settings example then , but replace Trill::CRAFT with Trill::BAR or Trill::SQUARE instead, open the Gui, set the mode to raw, do you see all zeros?

aaronBelaIssue

No this one works actually! Shows all bars at 0.500 with touches registering at the correct points

giuliomoro

aaronBelaIssue No this one works actually! Shows all bars at 0.500 with touches registering at the correct points

Can you show us a couple of screenshots?

giuliomoro

What about the Trill/bar-visual example?

aaronBelaIssue

Nothing, just the bar in the GUI without any red dot.

giuliomoro

Any log in the IDE's console?

aaronBelaIssue

Nothing irregular just:

Running project ...
Device type: Bar (1)
Address: 0x20
Firmware version: 3

aaronBelaIssue

With the prescaler set to 3, first photo with touch, second without:

aaronBelaIssue

Further testing has only given these warning logs if they have any importance at all.

make: Warning: File 'libraries/WSServer/build/WSServer.d' has modification time 231205198 s in the future
make: warning: Clock skew detected. Your build may be incomplete.

giuliomoro

The sensor seems to be working just fine from what you are showing us. Can you run this 🇦

#include <Bela.h>
#include <libraries/Trill/Trill.h>

// Trill object declaration
Trill touchSensor;

void loop(void*)
{
	while(!Bela_stopRequested())
	{
		// Read locations from Trill sensor
		touchSensor.readI2C();
		printf("[%d]: ", touchSensor.getNumTouches());
		for(unsigned int i = 0; i <  touchSensor.getNumTouches(); i++) {
			printf("%.2f %.2f, ", touchSensor.touchLocation(i), touchSensor.touchSize(i));
		}
		printf("\n");
		usleep(100000);
	}
}

bool setup(BelaContext *context, void *userData)
{
	// Setup a Trill Bar sensor on i2c bus 1, using the default mode and address
	if(touchSensor.setup(1, Trill::BAR) != 0) {
		fprintf(stderr, "Unable to initialise Trill Bar\n");
		return false;
	}
	touchSensor.printDetails();
	// Set and schedule auxiliary task for reading sensor data from the I2C bus
	Bela_runAuxiliaryTask(loop);
	return true;
}

void render(BelaContext *context, void *userData)
{}
void cleanup(BelaContext *context, void *userData)
{}

Do you see the touches being printed?

aaronBelaIssue

Touches are printed now, but they don't update strangely. If I touch the sensor while the project is starting/being setup it prints correctly.

However, the values won't change when I let go of the sensor. If I dont touch it on startup it starts on 0 and remains on 0.

giuliomoro

Try this:

#include <Bela.h>
#include <libraries/Trill/Trill.h>

// Trill object declaration
Trill touchSensor;

void loop(void*)
{
	while(!Bela_stopRequested())
	{
		// Read locations from Trill sensor
		int ret = touchSensor.readI2C();
		if(ret) {
			static bool printed = false;
			if(!printed)
				fprintf(stderr, "Error while reading\n");
			printed = true;
		} else {
			printf("[%d]: ", touchSensor.getNumTouches());
			for(unsigned int i = 0; i <  touchSensor.getNumTouches(); i++) {
				printf("%.2f %.2f, ", touchSensor.touchLocation(i), touchSensor.touchSize(i));
			}
			printf("\n");
		}
		usleep(100000);
	}
}

bool setup(BelaContext *context, void *userData)
{
	// Setup a Trill Bar sensor on i2c bus 1, using the default mode and address
	if(touchSensor.setup(1, Trill::BAR) != 0) {
		fprintf(stderr, "Unable to initialise Trill Bar\n");
		return false;
	}
	touchSensor.printDetails();
	// Set and schedule auxiliary task for reading sensor data from the I2C bus
	Bela_runAuxiliaryTask(loop);
	return true;
}

void render(BelaContext *context, void *userData)
{}

void cleanup(BelaContext *context, void *userData)
{}

aaronBelaIssue

Recognised but same issue. So strange

giuliomoro

And it doesn't print anything about errors? Can you power cycle the sensor and run this again?

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