1. Foto Hardware dan Diagram Blok [Kembali]
1. Arduino
2. DIP switch
3. 7-segment
4.. Jumper
5. Breadboard
2. Prosedur Percobaan [Kembali]
- Rangkai semua komponen
- Buat program di aplikasi arduino IDE
- Setelah selesai masukkan program ke arduino
- Jalankan program pada simulasi dan cobakan dengan modul
Rangkaian percobaan 2 menggunakan protokol komunikasi SPI, yang ditandai dengan peenggunaan pin MISO, MOSI, SCLK, dan SS. Pin-pin arduino tersebut dihubungkan dengan pin yang sama dengan yang ada pada arduino kedua. Percobaan ini terdiri dari arduino master yang terhubung dengan DIP switch (sebagai input) dan arduino slave terhubung dengan 7-segment (sebagai output)
7-segment akan menampilkan:
- angka 1: jika semua switch off
- no pin arduino (yang terhubung dengan switch yang on) : jika hanya satu witch on
- no pin terbesar arduino: jika lebih dari satu witch on
4. Flowchart dan Listing Program [Kembali]
//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]);
}
}
}
7-segment akan menampilkan:
- angka 1: jika semua switch off
- no pin arduino (yang terhubung dengan switch yang on) : jika hanya satu witch on
- no pin terbesar arduino: jika lebih dari satu witch on
- HTML↠ klik disini
- Video Percobaan↠ klik disini
- Datasheet Arduino UNO ↠ klik disini
- Datasheet LCD ↠ klik disini
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