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Full eeprom
#include <EEPROM.h>
#define bt_up A0 #define bt_down A1 #define bt_reset A2
#define buzzer 13
#define MAX7219_Clock 2 #define MAX7219_Chip_Select 3 #define MAX7219_Data_IN 4
long d1=0, d2=0, d3=0, d4=0, d5=0, d6=0, d7=0, d8=0;
int flag1=0, flag2=0, timer=0;
void setup() { // put your setup code here, to run once
pinMode(bt_up, INPUT_PULLUP); pinMode(bt_down, INPUT_PULLUP); pinMode(bt_reset, INPUT_PULLUP);
pinMode(buzzer, OUTPUT);
pinMode(MAX7219_Data_IN, OUTPUT); pinMode(MAX7219_Chip_Select, OUTPUT); pinMode(MAX7219_Clock, OUTPUT); digitalWrite(MAX7219_Clock, HIGH);
delay(200);
//Setup of MAX7219 chip shift(0x0f, 0x00); //display test register - test mode off shift(0x0c, 0x01); //shutdown register - normal operation shift(0x0b, 0x07); //scan limit register - display digits 0 thru 7 shift(0x0a, 0x0f); //intensity register - max brightness shift(0x09, 0xff); //decode mode register - CodeB decode all digits
if(EEPROM.read(0)==0){ }else{WriteEeprom(); EEPROM.write(0,0);} ReadEeprom();
}
void loop() {
if(digitalRead (bt_up) == 0){
if(flag1==0){ flag1=1;
d1=d1+1;
if(d1>9){d1=0; d2=d2+1;}
if(d2>9){d2=0; d3=d3+1;}
if(d3>9){d3=0; d4=d4+1;}
if(d4>9){d4=0; d5=d5+1;}
if(d5>9){d5=0; d6=d6+1;}
if(d6>9){d6=0; d7=d7+1;}
if(d7>9){d7=0; d8=d8+1;}
if(d8>9){d8=0;}
WriteEeprom();
}
}else{flag1=0;}
if(digitalRead (bt_down) == 0){
if(flag2==0){ flag2=1;
d1=d1-1;
if(d1<0){d1=9; d2=d2-1;}
if(d2<0){d2=9; d3=d3-1;}
if(d3<0){d3=9; d4=d4-1;}
if(d4<0){d4=9; d5=d5-1;}
if(d5<0){d5=9; d6=d6-1;}
if(d6<0){d6=9; d7=d7-1;}
if(d7<0){d7=9; d8=d8-1;}
if(d8<0){d8=9;}
WriteEeprom();
}
}else{flag2=0;}
if(digitalRead (bt_reset) == 0){
digitalWrite(buzzer, HIGH);
if(timer<200){timer=timer+1;}
if(timer==200){
d1=0, d2=0, d3=0, d4=0, d5=0, d6=0, d7=0, d8=0;
WriteEeprom();
}
}else{digitalWrite(buzzer, LOW); timer=0;}
shift(0x01, d1); //digit 0 (rightmost digit) data shift(0x02, d2); shift(0x03, d3); shift(0x04, d4); shift(0x05, d5); shift(0x06, d6); shift(0x07, d7); shift(0x08, d8); //digit 7 (leftmost digit) data delay(10); }
void ReadEeprom() { d1=EEPROM.read(1); d2=EEPROM.read(2); d3=EEPROM.read(3); d4=EEPROM.read(4); d5=EEPROM.read(5); d6=EEPROM.read(6); d7=EEPROM.read(7); d8=EEPROM.read(8); }
void WriteEeprom() {
EEPROM.write(1, d1);
EEPROM.write(2, d2);
EEPROM.write(3, d3);
EEPROM.write(4, d4);
EEPROM.write(5, d5);
EEPROM.write(6, d6);
EEPROM.write(7, d7);
EEPROM.write(8, d8);
}
void shift(byte send_to_address, byte send_this_data){ digitalWrite(MAX7219_Chip_Select, LOW); shiftOut(MAX7219_Data_IN, MAX7219_Clock, MSBFIRST, send_to_address); shiftOut(MAX7219_Data_IN, MAX7219_Clock, MSBFIRST, send_this_data); digitalWrite(MAX7219_Chip_Select, HIGH); }
