1. Hardware [kembali]
2. Rangkaian Simulasi [kembali]
4. Listing [kembali]
//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
}
}
5. Analisa [kembali]
Mengapa LED pada percobaan tidak hidup?
Dikarenakan adanya masalah yang terjadi saat mentransfer data dari master ke slave yang mana master dapat mengirim data akan tetapi slave tidak dapat menerima data hal ini ditunjukkan pada indikator TX Master hidup sedangkan indikator RX Slave mati
6. Vidio [kembali]
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