move all highlevel code into the protocol folder

protocol/master/master.c

@@ -0,0 +1,62 @@
+/*
+ * master.c
+ *
+ *  Created on: 06.12.2018
+ *      Author: julian
+ */
+
+#include "master.h"
+#include "../communication.h"
+
+void on_receive(iface_t * me, byte_t b, void*ptr)
+{
+	master_t * this = (master_t*)(ptr);
+
+	if (this->msg_byte_counter >= 0) {
+		if (this->msg_byte_counter <=8) {
+			static uint16_t temp = 0;
+			if (this->msg_byte_counter%2) {
+				temp |= (b<<7);
+
+				switch(this->msg_byte_counter) {
+				case 1:
+				case 3:
+				case 5:
+					this->buffer[this->chain_len].poti[this->msg_byte_counter/2] = temp;
+					break;
+				case 7:
+					this->buffer[this->chain_len].slider = temp;
+					break;
+				}
+			}else {
+				temp = b&0x7F;
+			}
+		} else {
+			this->buffer[this->chain_len].button = b&0x01;
+		}
+	}
+
+	this->msg_byte_counter++;
+	if (!(this->msg_byte_counter = (this->msg_byte_counter+1)%SLAVE_MESSAGE_LEN)) {
+		this->chain_len++;
+	}
+
+	// decode package
+	if (IS_EOM(b)) {
+		return;
+	}
+
+	// keep communication running
+	me->write(me, 0x00);
+}
+
+void master_init(master_t *master, iface_t * dev)
+{
+	dev->on_read = on_receive;
+	dev->callback_data = master;
+
+	// initialize master values
+	*master = struct {
+		.iface = dev,
+	};
+}

protocol/master/master.h

@@ -0,0 +1,36 @@
+/*
+ * master.h
+ *
+ *  Created on: 06.12.2018
+ *      Author: julian
+ */
+
+#ifndef __DSPLAB_COMMON_MASTER_H__
+#define __DSPLAB_COMMON_MASTER_H__
+
+#include "../slave/slave.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// how many channels we can encounter AT MOST
+#define MAX_CHAIN_LEN 10
+
+// this structure defines one complete chain
+typedef struct {
+	iface_t * iface;
+
+	message_t buffer[MAX_CHAIN_LEN];
+
+	int chain_len;	//< measured chainlength
+	int msg_byte_counter; //< bytecounter of receiver
+} master_t;
+
+void master_init(master_t *master, iface_t * dev);
+
+#ifdef __cplusplus
+} // end extern "C"
+#endif
+
+#endif /* __DSPLAB_COMMON_MASTER_H__ */