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DAFTAR ISI

1. Hardware

2. Rangkaian Simulasi

3. Flowchart

4. Listing Program

5. Analisa

6. Video Praktikum 

7. Link Download

1. Hardware  [Kembali]

Gambar Button

GambarLED

2. Rangkaian  [Kembali]

3.Flowchart  [Kembali]

4. Listing Program  [Kembali]

MASTER
#include<SPI.h>
#define SLAVE_ADDR 9

bool state, lastState;

int analogPin = 0;
int val = 0;

void setup() {
  pinMode(analogPin, INPUT_PULLUP);
  pinMode(analogPin, OUTPUT);
  pinMode(SS, OUTPUT);
  digitalWrite(SS, HIGH);
  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV8);
}
void loop() {
  state = digitalRead(analogPin);
  if(state != lastState){
  delay(50);
  val = map(analogRead(analogPin), 0, 1023, 255, 1);

  Serial.print(val);
  }
}

SLAVE
#include<SPI.h>
#define SLAVE_ADDR 9

int LED = 13;
int rd;
int br;

void setup() {
  pinMode(LED, OUTPUT);
  SPCR |= _BV(SPE);
  SPI.attachInterrupt();

}
void loop() {
 
  delay(50);
  br = map(rd, 1, 255, 100, 2000);

  digitalWrite(LED, HIGH);
  delay(br);
  digitalWrite(LED, LOW);
  delay(br);

}

5. Analisa  [Kembali]

Buatlah Program menggunakan input potensiometer menggunakan komunikasi SPI

/MASTER

#include <SPI.h>   //Deklarasi library SPI

void setup (void) {
  Serial.begin(115200); //Set baud rate 115200
  digitalWrite(SS, HIGH);
  // disable Slave Select
  SPI.begin ();
  SPI.setClockDivider(SPI_CLOCK_DIV8);  //divide the clock by 8
}

void loop (void) {
  char c;
  digitalWrite(SS, LOW);  //enable Slave Select
  // send test string
  for (const char * p = "Hello, world!\r" ; c = *p; p++)
  {
    SPI.transfer (c);
    Serial.print(c);
  }
  digitalWrite(SS, HIGH); // disable Slave Select
delay(2000);
}

//SLAVE

#include <SPI.h>
char buff [50];
volatile byte indx;
volatile boolean process;

void setup (void) {
  Serial.begin (115200);
  pinMode(MISO, OUTPUT); // have to send on master in so it set as output
  SPCR |= _BV(SPE); // turn on SPI in slave mode
  indx = 0; // buffer empty
  process = false;
  SPI.attachInterrupt(); // turn on interrupt
}


ISR (SPI_STC_vect) // SPI interrupt routine
{
  byte c = SPDR; // read byte from SPI Data Register
  if (indx < sizeof buff) {
    buff [indx++] = c; // save data in the next index in the array buff
    if (c == '\r') //check for the end of the word
      process = true;
  }
}
void loop (void) {
  if (process) {
    process = false; //reset the process
    Serial.println (buff); //print the array on serial monitor
    indx = 0; //reset button to zero
  }
}

Serial Peripheral Interface (SPI) merupakan salah satu mode komunikasi serial synchrounous kecepatan tinggi yang dapat digunakan pada banyak microcontroller, termasuk Arduino. Untuk komunikasi SPI sendiri, membutuhkan paling tidak tiga jalur, yakni MOSI, MISO, dan SCK. Melalui komunikasi ini data dapat saling dikirimkan baik antar microcontroller, maupun antara microcontroller dengan peripheral lainnya yang mendukung komunikasi dengan SPI

1.      

6. Video Praktikum  [Kembali]

7. Link Download  [Kembali]

 Download Listing Program 

 Download Video Praktikum 
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