TCA9548A I2C Multiplexer

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TCA9548A I2C Multiplexer

產品貨號：368031001119
區號：
品牌：Adafruit
原廠貨號：2717

滿千免運優惠(限郵寄和超商純取貨) on order

本賣場無實體店面，無提供自取服務，敬請見諒。 on order

NT$350

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Description

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Description

你找到了完美的 I2C 感測器，這個晶片有一個固定的 I2C 地址，根據我對 I2C 的了解，你不可能有兩個設備在相同的 SDA/SCL 引腳上具有相同的地址！如果您沒有這款超酷的 TCA9548A 1 對 8 I2C 多路復用器，您會的！
最後，一種將多達 8 個相同地址的 I2C 設備連接到一個微控制器的方法 - 該多路復用器充當看門人，使用您的命令將命令傳送到選定的一組 I2C 引腳。
使用它相當簡單：多路復用器本身位於 I2C 地址 0x70（但可以從 0x70 調整到 0x77），您只需將具有所需多路復用輸出編號的單個字節寫入該端口，然後 bam - 任何未來的 I2C 數據包將被發送到該端口。理論上，您可以在 0x70-0x77 地址中的每一個上擁有 8 個這樣的多路復用器，以便控制相同 I2C 尋址部分的 64 個。
像所有 Adafruit 突破一樣，我們將這款出色的放在突破上，這樣您就可以在帶有電容器、上拉和下拉的麵包板上使用它，使用變得更簡單。需要一些接頭，一旦焊接，您就可以將其插入無焊麵包板。晶片本身符合 3V 和 5V 標準，因此您可以將其用於任何邏輯電平。

重量：1.8g
可選擇的 I2C 地址 0x70-0x77
產品尺寸：30.6mm x 17.6mm x 2.7mm

如何查詢I2C位址

操作流程

STEP 1. 將欲查詢的模組連接至Arduino UNO（附圖為腳位參考，實際請比對商品標示接線）

STEP 2. 開啟Arduino IDE並新增檔案

STEP 3. 貼入教學下方的範例文件，並上傳到Arduino UNO，即會開始掃描I2C位址

STEP 4. 開啟序列埠監控視窗，即可取得I2C位址

I2C掃描範例程式

    / ---------------------------------------------------------------- / 
  // Arduino I2C Scanner 
  // Re-writed by Arbi Abdul Jabbaar 
  // Using Arduino IDE 1.8.7 
  // Using GY-87 module for the target 
  // Tested on 10 September 2019 
  // This sketch tests the standard 7-bit addresses 
  // Devices with higher bit address might not be seen properly. 
  / ---------------------------------------------------------------- / 
    
  #include  //include Wire.h library 
    
  void setup() 
  { 
   Wire.begin(); // Wire communication begin 
   Serial.begin(9600); // The baudrate of Serial monitor is set in 9600 
   while (!Serial); // Waiting for Serial Monitor 
   Serial.println("\nI2C Scanner"); 
  } 
    
  void loop() 
  { 
   byte error, address; //variable for error and I2C 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); 
   } 
   } 
   if (nDevices == 0) 
   Serial.println("No I2C devices found\n"); 
   else 
   Serial.println("done\n"); 
    
   delay(5000); // wait 5 seconds for the next I2C scan 
  } 

 

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TCA9548A I2C Multiplexer x 1

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	/ ---------------------------------------------------------------- /
	// Arduino I2C Scanner
	// Re-writed by Arbi Abdul Jabbaar
	// Using Arduino IDE 1.8.7
	// Using GY-87 module for the target
	// Tested on 10 September 2019
	// This sketch tests the standard 7-bit addresses
	// Devices with higher bit address might not be seen properly.
	/ ---------------------------------------------------------------- /

	#include //include Wire.h library

	void setup()
	{
	Wire.begin(); // Wire communication begin
	Serial.begin(9600); // The baudrate of Serial monitor is set in 9600
	while (!Serial); // Waiting for Serial Monitor
	Serial.println("\nI2C Scanner");
	}

	void loop()
	{
	byte error, address; //variable for error and I2C 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);
	}
	}
	if (nDevices == 0)
	Serial.println("No I2C devices found\n");
	else
	Serial.println("done\n");

	delay(5000); // wait 5 seconds for the next I2C scan
	}

TCA9548A I2C Multiplexer

操作流程

I2C掃描範例程式

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