KOMUNIKASI SPI
1. Kondisi [Kembali]
Ubah button menjadi saklar SPST
2. Gambar Rangkaian Simulasi [Kembali]
Listing Program
MASTER
#include<SPI.h> //Library for SPI
#define LED 7
#define ipbutton 2
int buttonvalue;
int x;
void setup (void) {
Serial.begin(115200); //Starts Serial Communication at Baud Rate 115200
pinMode(ipbutton,INPUT); //Sets pin 2 as input
pinMode(LED,OUTPUT); //Sets pin 7 as Output
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,Mastereceive;
buttonvalue = digitalRead(ipbutton); //Reads the status of the pin 2
if(buttonvalue == HIGH) //Logic for Setting x value (To be sent to slave) depending upon input from pin 2
{
x = 0;
}
else
{
x = 1;
}
digitalWrite(SS, LOW); //Starts communication with Slave connected to master
Mastersend = x;
Mastereceive=SPI.transfer(Mastersend); //Send the mastersend value to slave also receives value from slave
if(Mastereceive == 1) //Logic for setting the LED output depending upon value received from slave
{
digitalWrite(LED,HIGH); //Sets pin 7 HIGH
Serial.println("Master LED ON");
}
else
{
digitalWrite(LED,LOW); //Sets pin 7 LOW
Serial.println("Master LED OFF");
}
delay(100);
}
SLAVE
//SPI SLAVE (ARDUINO)
//SPI COMMUNICATION BETWEEN TWO ARDUINO
//CIRCUIT DIGEST
//Pramoth.T
#include<SPI.h>
#define LEDpin 7
#define buttonpin 2
volatile boolean received;
volatile byte Slavereceived,Slavesend;
int buttonvalue;
int x;
void setup() {
Serial.begin(115200);
pinMode(buttonpin,INPUT); // Setting pin 2 as INPUT
pinMode(LEDpin,OUTPUT); // Setting pin 7 as OUTPUT
pinMode(MISO,OUTPUT); //Sets MISO as OUTPUT (Have to Send data to Master IN
SPCR |= _BV(SPE); //Turn on SPI in Slave Mode
received = false;
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()
{ if(received) //Logic to SET LED ON OR OFF depending upon the value recerived from master
{
if (Slavereceived==1)
{
digitalWrite(LEDpin,HIGH); //Sets pin 7 as HIGH LED ON
Serial.println("Slave LED OFF");
}
else
{
digitalWrite(LEDpin,LOW); //Sets pin 7 as LOW LED OFF
Serial.println("Slave LED ON");
}
buttonvalue = digitalRead(buttonpin); // Reads the status of the pin 2
if (buttonvalue == HIGH) //Logic to set the value of x to send to master
{
x=0;
}
else
{
x=1;
}
Slavesend=x;
SPDR = Slavesend; //Sends the x value to master via SPDR
delay(100);
}
}
3. Video Simulasi [Kembali]
4. Prinsip Kerja Rangkaian [Kembali]
Rangkaian diatas menggunakan beberapa komponen utama seperti arduino uno, saklar SPST, LED, dan resistor. Pada komunikasi SPI ini memiliki 4 buah pin yang akan dihubungkan pada masing-masing arduino. Pin-pin yang terhubung berupa pin SS pada pin 10, MOSI pada pin 11, MISO pada pin 12, dan SCK pada pin 13. Prinsip kerja rangkaian ini yaitu saklar pada master akan mempengaruhi LED pada slave dan begitu juga sebaliknya. Ketika saklar pada master dibuka maka akan terjadi aktif keadaan MOSI yaitu master akan mengirim sinyal dan slave akan menerima sinyal sehingga LED pada slave akan aktif. Ketika saklar pada slave dibuka maka akan terjadi aktif keadaan MISO yaitu slave akan mengirim sinyal dan master akan menerima sinyal sehingga LED pada master akan aktif.
5. Link Download [Kembali]
- HTML klik disini
- Simulasi Proteus klik disini
- Listing Program klik disini
- Video klik disini
- Datasheet Arduino UNO klik disini
- Library Arduino UNO klik disini
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