TP 3 Mikro 2019



1. Kondisi [kembali]
Percobaan 2    : SPI 
Kondisi 12    : Ganti Led menjadi Buzzer, buatlah kondisi awal buzzer mati, lalu hidup dengan delay1000 ms

2. Rangkaian Simulasi [kembali]


3. Flowchart [kembali]



4. Listing Program [kembali]
//MASTER
#include  <SPI.h>

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. Video [kembali]


6. Link Download [kembali]
Video [Download]
Rangkaian [Download]
Koding : Master [download] ; Slave [Download]
HTML [Download]



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