查看Noduino I2C Scan的源代码

== 代码示例 ==

<source lang=cpp>
#include "noduino.h"

void setup()
{
	serial_begin(115200);
	wire_begin();
}

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

	serial_printf("I2C Scanning...\r\n");

	nDevices = 0;
	for (address = 1; address < 127; address++) {
		// The i2c_scanner uses the return value of
		// the wire_endTransmisstion to see if
		// a device did acknowledge to the address.
		wire_beginTransmission(address);
		error = wire_endTransmission();

		if (error == 0) {
			serial_printf("I2C device found at address 0x%02X\r\n", address);
			nDevices++;
		} else if (error == 4) {
			serial_printf("Unknow error at address 0x%02X\r\n", address);
		}
	}
	if (nDevices == 0)
		serial_printf("No I2C devices found\r\n");
	else
		serial_printf("done\r\n");

	delay(25*1000);
}
</source>


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