From 3141c7a8589de99a288fb435bba632f7c50d8197 Mon Sep 17 00:00:00 2001
From: Lukas Loidold <lloidold@irs.uni-stuttgart.de>
Date: Wed, 22 Apr 2020 10:35:58 +0200
Subject: [PATCH] IO specialized for SPI

---
 main.cpp | 35 ++++++++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 9 deletions(-)

diff --git a/main.cpp b/main.cpp
index 4a2ce87..22f6c56 100644
--- a/main.cpp
+++ b/main.cpp
@@ -11,8 +11,8 @@
 #include "arduino_core/ArduinoCore-avr/libraries/SPI/src/SPI.h"
 
 //Define which port to use for the SPI Chip Select
-#define CS_PORT PORTC
-#define CS_DDR DDRC
+#define CS_PORT PORTB
+#define CS_DDR DDRB
 
 #define RING_BUFFER_SIZE 100
 #define MAX_PACKET_LENGTH 100
@@ -47,11 +47,21 @@ void sendData(uint8_t *data, size_t len) {
 }
 
 void transferSPI(uint8_t address, uint8_t *data, size_t datalen) {
-	SPI.beginTransaction(SPISettings(14000000, MSBFIRST, SPI_MODE3));
-	CS_PORT = ~address;
-	SPI.transfer(data, datalen);
+	SPI.beginTransaction(SPISettings(100000, MSBFIRST, SPI_MODE3));
+	//CS_PORT = ~address;
+	digitalWrite(10, LOW);
+	//included
+    for (size_t i = 0; i < datalen; i++)
+    {
+    	Serial.print("SentData is: ");Serial.println(data[i]);
+        data[i] = SPI.transfer(data[i]);
+        Serial.print("Back from n-1 ");Serial.println(data[i]);
+
+    }
+	//SPI.transfer(data, datalen);
 	delay(100);
-	CS_PORT = 0xff;
+	digitalWrite(10, HIGH);
+	//CS_PORT = 0xff;
 	SPI.endTransaction();
 
 }
@@ -159,10 +169,17 @@ void serialEvent() {
 }
 
 void setup() {
-	CS_DDR = 0xff;
-	CS_PORT = 0xff;
+	//CS_DDR = 0xff;
+	//CS_PORT = 0xff;
+
+	//CS_DDR |= (1<<);
+	//CS_PORT |= (1<<PB2);
 	Serial.begin(9600);
-	SPI.begin();
+	pinMode(MOSI, OUTPUT);
+	pinMode(SCK, OUTPUT);
+	pinMode(MISO, INPUT);
+	pinMode(10, OUTPUT);
+	digitalWrite(10,HIGH);
 }
 
 void loop() {