35 lines
513 B
Arduino
35 lines
513 B
Arduino
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#include <Wire.h>
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#define SLAVE_ADDRESS 0x20
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byte reTxData;
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volatile bool flag = false;
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void setup()
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{
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Wire.setClock(1000000);
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Serial.begin(9600);
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Wire.onReceive(receiveEvent);
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Wire.onRequest(sendEvent);
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Wire.begin(SLAVE_ADDRESS);
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}
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void loop()
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{
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if (flag == true)
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{
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Serial.print("Data received from Master: ");
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Serial.println(reTxData);
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flag = false;
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}
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}
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void receiveEvent(int numBytes)
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{
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reTxData = Wire.read();
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flag = true;
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}
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void sendEvent()
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{
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Wire.write(reTxData);
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}
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