arduino I2C从机接收其他主机写入的数据怎么做呢

armos · 发表于 2022-1-29 00:10:31

下面是和主机读取的代码，写入的话应该怎么做
// Wire Slave Receiver
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Receives data as an I2C/TWI slave device
// Refer to the "Wire Master Writer" example for use with this

// Created 29 March 2006

// This example code is in the public domain.

#include <Wire.h>

int addr = 0;

void setup() {
  Wire.begin(16);             // join i2c bus with address #8
  Wire.onReceive(receiveEvent); // register event
  Wire.onRequest(ggyy);
  Serial.begin(9600);          // start serial for output
}

void loop() {
  delay(100);
}

// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany)
{
  while (1 < Wire.available())
  { // loop through all but the last
char c = Wire.read(); // receive byte as a character
Serial.print("char:");
Serial.print(c,HEX);       // print the character
  }
  addr = Wire.read(); // receive byte as an integer
  Serial.print("int:");
  Serial.println(addr,HEX);       // print the integer
  W
}

void ggyy()
{
//  Wire.write("5653454353453543"); // 送出 6 个char给IC 上的主机
  if(addr == 0x03)
  {
Wire.write(0x35);
  }
if(addr == 0x04)
  {
Wire.write(0x36);
  }
}

arduino I2C从机接收其他主机写入的数据怎么做呢

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