1 files changed, 30 insertions, 0 deletions
diff --git a/spi_comm/arduino_slave_read/arduino_slave_read.ino b/spi_comm/arduino_slave_read/arduino_slave_read.ino
new file mode 100644
index 0000000..8264ae3
--- /dev/null
+++ b/spi_comm/arduino_slave_read/arduino_slave_read.ino
@@ -0,0 +1,30 @@
+#include<SPI.h>
+
+volatile boolean received;
+volatile byte receivedData;
+
+ISR (SPI_STC_vect)        //Inerrrput routine function 
+{
+  receivedData = SPDR;   // Get the received data from SPDR register
+  received = true;       // Sets received as True 
+}
+
+void setup()
+{
+  Serial.begin(115200);
+
+  pinMode(MISO,OUTPUT);   //Sets MISO as OUTPUT
+  SPCR |= _BV(SPE);       //Turn on SPI in Slave Mode
+  received = false;
+  SPI.attachInterrupt();  //Activate SPI Interuupt 
+}
+
+
+void loop()
+{ 
+  if(received) {                        
+    SPDR = receivedData;    // send back the received data, this is not necessary, only for demo purpose
+    received = false;
+    Serial.print(receivedData, HEX);
+  }
+}