Real-time, ultra-low-latency audio and sensor processing system for BeagleBone Black
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Detect All I2C Devices

This example is a handy utility which will identify all connected I2C devices and print information on them to the console.

When the program runs it will print the address and sensor type of all the Trill sensors you currently have connected to the I2C bus.

This is particularly useful if you are unsure of the address of the sensor after changing it via the solder bridges on the back. This example will also give you a total count of the amount of Trill sensors connected to Bela.

NOTE: as this example scans several addresses on the i2c bus it could cause non-Trill peripherals connected to it to malfunction.

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#include <Bela.h>
#include <libraries/Trill/Trill.h>
bool setup(BelaContext *context, void *userData)
unsigned int i2cBus = 1;
printf("Trill devices detected on bus %d\n", i2cBus);
printf("Address | Type\n");
unsigned int total = 0;
for(uint8_t n = 0x20; n <= 0x50; ++n) {
Trill::Device device = Trill::probe(i2cBus, n);
if(device != Trill::NONE) {
printf("%#4x (%3d) | %s\n", n, n, Trill::getNameFromDevice(device).c_str());
printf("Total: %d devices\n", total);
return true;
void render(BelaContext *context, void *userData)
// we do not actually need to do any audio processing in this program, so as soon as it starts , we stop it
void cleanup(BelaContext *context, void *userData)