SPI Dice Roll

Solving Approach

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Code

/*Paste your code here*/
#include <SPI.h>

#define PushButton   5
#define SS   9


void setup() {
  pinMode(PushButton, INPUT_PULLUP); // push button
  Serial.begin(9600);
  Serial.println("=== SPI DICE ROLL - MASTER ===");
  
  SPI.begin();
  SPI.setDataMode(SPI_MODE0);
       
 // pinMode(MOSI, OUTPUT);  // Set MISO as OUTPUT to send data to the master
  // pinMode(MISO, INPUT);  // Set MISO as OUTPUT to send data to the master
  // pinMode(SCK, OUTPUT);  // 
  pinMode(SS, OUTPUT);  // 
  digitalWrite(SS, HIGH);
}
void loop() {
   int receivedNumber = 5;
   bool but_val = digitalRead(PushButton);
   
   // Check if button is pressed
   if(but_val == 0)
   {
    // Debounce delay
    delay(50);
    // select the slave
    digitalWrite(SS, LOW);
    delayMicroseconds(10);      // Small delay for slave to detect
    receivedNumber = SPI.transfer(0x00);
    delayMicroseconds(10);
    digitalWrite(SS, HIGH); // deselect slave
   
    Serial.print("you rolled a : ");
    Serial.println(receivedNumber);
   }

 // Small delay before next roll
    delay(1000);
  
}

Output

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Screenshot of Serial Terminal 

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