Giải Bích Quế Viên Bôi lần thứ 8 năm 2019 (Trịnh Duy Đồng vô địch P38)

[taipscode]

Thuật toán cũ lạc hậu, ko hứng thú lắm. Mình học ở đâu như thế nào mời giở vài trang trước sẽ thấy.

#include <EEPROM.h>

// these values are saved in EEPROM
const byte EEPROM_ID = 0x99; // used to identify if valid data in EEPROM
byte ledPin = 13; // the number of the LED pin
int interval = 1000; // interval at which to blink (milliseconds)

// variables that do not need to be saved
int ledState = LOW; // ledState used to set the LED
long previousMillis = 0; // will store last time LED was updated

//constants used to identify EEPROM addresses
const int ID_ADDR = 0; // the EEPROM address used to store the ID
const int PIN_ADDR = 1; // the EEPROM address used to store the pin
const int INTERVAL_ADDR = 2; // the EEPROM address used to store the interval

void setup()
{
Serial.begin(9600);
byte id = EEPROM.read(ID_ADDR); // read the first byte from the EEPROM
if( id == EEPROM_ID)
{
// here if the id value read matches the value saved when writing eeprom
Serial.println("Using data from EEPROM");
ledPin = EEPROM.read(PIN_ADDR);
byte hiByte = EEPROM.read(INTERVAL_ADDR);
byte lowByte = EEPROM.read(INTERVAL_ADDR+1);
interval = word(hiByte, lowByte); // see word function in Recipe 3.15
}
else
{
// here if the ID is not found, so write the default data
Serial.println("Writing default data to EEPROM");
EEPROM.write(ID_ADDR,EEPROM_ID); // write the ID to indicate valid data
EEPROM.write(PIN_ADDR, ledPin); // save the pin in eeprom
byte hiByte = highByte(interval);
byte loByte = lowByte(interval);
EEPROM.write(INTERVAL_ADDR, hiByte);
EEPROM.write(INTERVAL_ADDR+1, loByte);

}
Serial.print("Setting pin to ");
Serial.println(ledPin,DEC);
Serial.print("Setting interval to ");
Serial.println(interval);

pinMode(ledPin, OUTPUT);
}

void loop()
{
// this is the same code as the BlinkWithoutDelay example sketch
if (millis() - previousMillis > interval)
{
previousMillis = millis(); // save the last time you blinked the LED
// if the LED is off turn it on and vice versa:
if (ledState == LOW)
ledState = HIGH;
else
ledState = LOW;
digitalWrite(ledPin, ledState); // set LED using value of ledState
}
processSerial();
}

// function to get duration or pin values from Serial Monitor
// value followed by i is interval, p is pin number
int value = 0;

void processSerial()
{
if( Serial.available())
{
char ch = Serial.read();
if(ch >= '0' && ch <= '9') // is this an ascii digit between 0 and 9?
{
value = (value * 10) + (ch - '0'); // yes, accumulate the value
}
else if (ch == 'i') // is this the interval
{
interval = value;
Serial.print("Setting interval to ");
Serial.println(interval);
byte hiByte = highByte(interval);
byte loByte = lowByte(interval);
EEPROM.write(INTERVAL_ADDR, hiByte);
EEPROM.write(INTERVAL_ADDR+1, loByte);
value = 0; // reset to 0 ready for the next sequence of digits
}
else if (ch == 'p') // is this the pin number
{
ledPin = value;
Serial.print("Setting pin to ");
Serial.println(ledPin,DEC);
pinMode(ledPin, OUTPUT);
EEPROM.write(PIN_ADDR, ledPin); // save the pin in eeprom
value = 0; // reset to 0 ready for the next sequence of digits
}
}
}


Bác có biết code này là gì hem ,biết thì bàn tiếp ,còn không thì tui không tiếp bác nữa ...

(Lập trình robot mừ bác chê là lạc hậu thì tui chả biết cái gì là mới nữa ...)