Arduino 通过TCA9548A 或其他IIC扩展实现12个传感器的数据读取？

求助 TCA9548A可以进行级联使用吗

user6186418：

回复 Amy Luo:

你好 我将两个TCA9548A进行级联以后 用端口检索程序检索不到第二片TCA9548A的地址 两片芯片没有问题

/** * TCA9548 I2CScanner.pde — I2C bus scanner for Arduino * * Based on code c. 2009, Tod E. Kurt, http://todbot.com/blog/ * */

#include "Wire.h"extern "C" { #include "utility/twi.h"  // from Wire library, so we can do bus scanning}

#define TCAADDR 0x70

void tcaselect(uint8_t i) {  if (i > 7) return;   Wire.beginTransmission(TCAADDR);  Wire.write(1 << i);  Wire.endTransmission();  }

// standard Arduino setup()void setup(){    while (!Serial);    delay(1000);

    Wire.begin();        Serial.begin(115200);    Serial.println("\nTCAScanner ready!");        for (uint8_t t=0; t<8; t++) {      tcaselect(t);      Serial.print("TCA Port #"); Serial.println(t);

      for (uint8_t addr = 0; addr<=127; addr++) {        if (addr == TCAADDR) continue;              uint8_t data;        if (! twi_writeTo(addr, &data, 0, 1, 1)) {           Serial.print("Found I2C 0x");  Serial.println(addr,HEX);        }      }    }    Serial.println("\ndone");}

void loop() {}