tca9548 i2cscanner arduino

1/**
2 * TCA9548 I2CScanner.ino -- I2C bus scanner for Arduino
3 *
4 * Based on https://playground.arduino.cc/Main/I2cScanner/
5 *
6 */
7
8#include "Wire.h"
9
10#define TCAADDR 0x70
11
12void tcaselect(uint8_t i) {
13  if (i > 7) return;
14 
15  Wire.beginTransmission(TCAADDR);
16  Wire.write(1 << i);
17  Wire.endTransmission();  
18}
19
20
21// standard Arduino setup()
22void setup()
23{
24    while (!Serial);
25    delay(1000);
26
27    Wire.begin();
28    
29    Serial.begin(115200);
30    Serial.println("\nTCAScanner ready!");
31    
32    for (uint8_t t=0; t<8; t++) {
33      tcaselect(t);
34      Serial.print("TCA Port #"); Serial.println(t);
35
36      for (uint8_t addr = 0; addr<=127; addr++) {
37        if (addr == TCAADDR) continue;
38
39        Wire.beginTransmission(addr);
40        if (!Wire.endTransmission()) {
41          Serial.print("Found I2C 0x");  Serial.println(addr,HEX);
42        }
43      }
44    }
45    Serial.println("\ndone");
46}
47
48void loop() 
49{
50}