62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
// Wire Master Reader
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// by Nicholas Zambetti <http://www.zambetti.com>
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// Demonstrates use of the Wire library
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// Reads data from an I2C/TWI slave device
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// Refer to the "Wire Slave Sender" example for use with this
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// Created 29 March 2006
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// This example code is in the public domain.
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#include <Wire.h>
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void setup()
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{
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Wire.begin(); // join i2c bus (address optional for master)
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Serial.begin(9600); // start serial for output
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writeMCP(0x6F, 0x01, 0x30); //Minutes
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writeMCP(0x6F, 0x02, 0x12); //Hora
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writeMCP(0x6F, 0x03, 0x03); //Day
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writeMCP(0x6F, 0x04, 0x26); //Date
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writeMCP(0x6F, 0x05, 0x06); //Month
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writeMCP(0x6F, 0x06, 0x13); //Year
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writeMCP(0x6F, 0x00, 0x45 | 0x80); //Year
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}
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byte readMCP(int deviceaddress, byte address ) {
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Wire.beginTransmission(deviceaddress);
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Wire.write(address);
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Wire.endTransmission();
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Wire.requestFrom(deviceaddress, 1);
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unsigned long time = millis();
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while (!Wire.available()) if ((millis() - time)>500) return 0x1F;
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return Wire.read();
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}
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void writeMCP(int deviceaddress, byte address, byte time ) {
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Wire.beginTransmission(deviceaddress);
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Wire.write(address);
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Wire.write(time);
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Wire.endTransmission();
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delay(100);
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}
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void loop()
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{
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Serial.println(readMCP(0x6F, 0x00)&0x7F, HEX);
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//Serial.println(F_CPU);
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delay(1000);
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// Wire.beginTransmission(4); // transmit to device #4
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// Wire.write("x is "); // sends five bytes
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// Wire.write(x); // sends one byte
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// Wire.endTransmission(); // stop transmitting
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//
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// x++;
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// delay(500);
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}
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