KULIAH TEKNIK ELEKTRO: Laporan Akhir 1

saat program dijalankan dan masuk ke komponen arduino MASTER. Selanjutnya, program terus berjalan dalam loop utama, pada saat awal jalannya rangkaian arduino master akan menerima inputan dari dipswitch lalu akan mengirimkannya ke arduino slave. Setelah arduino slave menerima sinyal dari master lalu 7segment akan mendeteksi pin berapa yang sedang berlogika low pada seven segment sehingga 7segment akan menampilkan sesuai inputan yang diberikan pada arduino.

4. FlowChart [Kembali]

a. Listing Program

//Master Arduino
#include<SPI.h> //Library for SPI 
int dip[] = {2,3,4,5,6,7,8,9};
int dipvalue[] = {};
void setup (){
 Serial.begin(9600); //Starts Serial Communication at Baud Rate 115200 
 for(int i = 0; i < 8; i++){
 pinMode(dip[i], INPUT_PULLUP);
 }
 SPI.begin(); //Begins the SPI commnuication
 SPI.setClockDivider(SPI_CLOCK_DIV8); //Sets clock for SPI communication at 8 (16/8=2Mhz)
 digitalWrite(SS,HIGH); // Setting SlaveSelect as HIGH (So master doesnt connnect with 
slave)
}
void loop(void){
 byte Mastersend;
 int x = 1; 
 for(int i = 0; i < 8; i++){
 dipvalue[i] = digitalRead(dip[i]);
 if(dipvalue[i] == LOW){
 x = dip[i];
 }
 }
 digitalWrite(SS, LOW); //Starts communication with Slave connected to master
 Mastersend = x;
 Serial.println(Mastersend); 
 SPI.transfer(Mastersend); //Send the mastersend value to slave also receives value from slave
 delay(1000);
}

//Slave Arduino:
#include<SPI.h>
const int segmentPins[] = {9, 8, 7, 6, 5, 4, 3, 2};
volatile boolean received = false;
volatile byte Slavereceived;
int index;
void setup(){
 Serial.begin(9600);
 for (int i = 0; i < 8; i++) {
 pinMode(segmentPins[i], OUTPUT);
 }
 SPCR |= _BV(SPE); //Turn on SPI in Slave Mode
 SPI.attachInterrupt(); //Interuupt ON is set for SPI commnucation
}
ISR (SPI_STC_vect){ //Inerrrput routine function
 Slavereceived = SPDR; // Value received from master if store in variable slavereceived
 received = true; //Sets received as True 
}
void loop(){
 Serial.println(Slavereceived);
 if(received){//Logic to SET LED ON OR OFF depending upon the value recerived from master 
 displayCharacter(Slavereceived);
 delay(1000);
 }
}
void displayCharacter(int ch) {
 byte patterns[10][7] = {
 {0, 0, 0, 0, 0, 0, 1}, // 0
 {1, 0, 0, 1, 1, 1, 1}, // 1
 {0, 0, 1, 0, 0, 1, 0}, // 2
 {0, 0, 0, 0, 1, 1, 0}, // 3
 {1, 0, 0, 1, 1, 0, 0}, // 4 
 {0, 1, 0, 0, 1, 0, 0}, // 5 
 {0, 1, 0, 0, 0, 0, 0}, // 6
 {0, 0, 0, 1, 1, 1, 1}, // 7
 {0, 0, 0, 0, 0, 0, 0}, // 8
 {0, 0, 0, 0, 1, 0, 0} // 9
 };
if ((ch >= 0 && ch <= 9)) {
 // Get the digit index (0-9) from the character
 int index = ch;
 // Write the pattern to the segment pins
 for (int i = 0; i < 7; i++) {
 digitalWrite(segmentPins[i], patterns[index][i]);
 }
 }
}