Arduino for STM32

Code: Select all

#include <Wire.h>

void scan(void) {
	byte error, address;
	int nDevices;

	Serial.println("Scanning...");
	
	nDevices = 0;
	for(address = 1; address < 127; address++ )
	{
		// The i2c_scanner uses the return value of
		// the Write.endTransmisstion to see if
		// a device did acknowledge to the address.
		Wire.beginTransmission(address);
		error = Wire.endTransmission();
		
		if (error == 0)
		{
			Serial.print("I2C device found at address 0x");
			if (address<16)
				Serial.print("0");
				Serial.print(address,HEX);
				Serial.println("  !");
		
			nDevices++;
		}
		else if (error==4)
		{
			Serial.print("Unknown error at address 0x");
			if (address<16)
				Serial.print("0");
				Serial.println(address,HEX);
		}
		
		digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
	}
	if (nDevices == 0)
		Serial.println("No I2C devices found\n");
	else
		Serial.println("done\n");
}

void setup() {
	Wire.begin(); // initialise the connection
	Serial.begin(115200);
	
	Serial.println("I2C Test");
}

void loop() {
	scan();
	delay(5000);
}