diff --git a/firmware/masterchip/Makefile b/firmware/masterchip/Makefile
index c5d5e81..41d1edd 100644
--- a/firmware/masterchip/Makefile
+++ b/firmware/masterchip/Makefile
@@ -3,7 +3,7 @@ include ../Makefile.inc
 
 COMPILE = avr-gcc $(CFLAGS) $(DEFINES)
 
-OBJECTS = usbdrv/usbdrvasm.o usbdrv/usbdrv.o main.o display.o lcd/lcd.o usb.o softtimer.o spi.o spi_proto.o
+OBJECTS = usbdrv/usbdrvasm.o usbdrv/usbdrv.o main.o display.o lcd/lcd.o usb.o softtimer.o spi.o spi_proto.o spi_pointers.o
 
 # symbolic targets:
 all:	firmware.hex
diff --git a/firmware/masterchip/display.h b/firmware/masterchip/display.h
index c085f61..8f433f8 100644
--- a/firmware/masterchip/display.h
+++ b/firmware/masterchip/display.h
@@ -2,8 +2,8 @@
 #define __DISPLAY_H
 
 #include <avr/pgmspace.h>
+#include <stdio.h>
 #include "lcd/lcd.h"
-#include "main.h"
 
 
 #define LCD_CHAR_HALFBAR 0x01
@@ -11,7 +11,7 @@
 #define LCD_CHAR_DEGREE  0x03
 #define LCD_CHAR_BLANK   0x20
 
-extern uint8_t newThermoData1;
+extern uint8_t newThermoData;
 extern uint16_t thermoData[];
 
 
diff --git a/firmware/masterchip/main.c b/firmware/masterchip/main.c
index 0368648..bef4723 100644
--- a/firmware/masterchip/main.c
+++ b/firmware/masterchip/main.c
@@ -1,3 +1,19 @@
+#include <stdint.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include <avr/eeprom.h>
+#include <util/delay.h>
+#include <util/atomic.h>
+#include <stdio.h>
+
+#include "usbdrv/usbdrv.h"
+
+#include "display.h"
+#include "spi.h"
+#include "usb.h"
+#include "softtimer.h"
+
 #include "main.h"
 
 uint8_t newThermoData = 1;
diff --git a/firmware/masterchip/main.h b/firmware/masterchip/main.h
index 0595353..0f442ea 100644
--- a/firmware/masterchip/main.h
+++ b/firmware/masterchip/main.h
@@ -11,23 +11,8 @@
 
 #ifndef __MAIN_H
 #define __MAIN_H
-#include <stdint.h>
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <avr/pgmspace.h>
-#include <avr/eeprom.h>
-#include <util/delay.h>
-#include <util/atomic.h>
-#include <stdio.h>
-
-#include <usbdrv/usbdrv.h>
-
-#include "display.h"
-#include "spi.h"
-#include "usb.h"
 
 #define SOFTTIMERNUMS 4
-#include "softtimer.h"
 
 extern uint8_t newThermoData;
 extern uint16_t thermoData[];
diff --git a/firmware/masterchip/spi_pointers.c b/firmware/masterchip/spi_pointers.c
new file mode 100644
index 0000000..0ee5993
--- /dev/null
+++ b/firmware/masterchip/spi_pointers.c
@@ -0,0 +1,12 @@
+
+// dummy so spi_proto can be shared
+
+#include "spi_pointers.h"
+
+uint16_t *spi_proto_globals8[] = { };
+uint8_t *spi_proto_globals16[] = { };
+funptr_t spi_proto_funcs[] = { };
+
+
+
+
diff --git a/firmware/masterchip/spi_pointers.h b/firmware/masterchip/spi_pointers.h
new file mode 100644
index 0000000..6a52b05
--- /dev/null
+++ b/firmware/masterchip/spi_pointers.h
@@ -0,0 +1,16 @@
+#ifndef __SPI_POINTERS_H
+#define __SPI_POINTERS_H
+// dummy-include so spi_proto can be shared
+
+#include <stdint.h>
+
+typedef void(*funptr_t)();
+
+extern uint16_t *spi_proto_globals8[];
+extern uint8_t *spi_proto_globals16[];
+extern funptr_t spi_proto_funcs[];
+
+
+#endif //__SPI_POINTERS_H
+
+
diff --git a/firmware/masterchip/usb.c b/firmware/masterchip/usb.c
index fc68300..f5ac651 100644
--- a/firmware/masterchip/usb.c
+++ b/firmware/masterchip/usb.c
@@ -1,5 +1,9 @@
+#include <stdint.h>
+#include "usbdrv/usbdrv.h"
+
 #include "main.h"
-#include "spi.h"
+
+
 #include "spi_proto.h"
 #include "usb.h"
 
diff --git a/firmware/shared/spi.c b/firmware/shared/spi.c
index 1474d84..eea1448 100644
--- a/firmware/shared/spi.c
+++ b/firmware/shared/spi.c
@@ -74,15 +74,17 @@ void spi_init(){
 
 
 
-#ifdef SPI_MASTER
 void spi_mst_start_packet(){
+#ifdef SPI_MASTER
 	SPI_SSOUT &= ~(_BV(SPI_SS_PIN));
+#endif
 }
 
 void spi_mst_end_packet(){
+#ifdef SPI_MASTER
 	SPI_SSOUT |= _BV(SPI_SS_PIN);
+#endif
 }
-#endif //SPI_MASTER
 
 #define SPI_WAIT while(SPSR & _BV(SPIF)){;}
 
diff --git a/firmware/shared/spi_proto.h b/firmware/shared/spi_proto.h
index 7ff1be8..a9736b1 100644
--- a/firmware/shared/spi_proto.h
+++ b/firmware/shared/spi_proto.h
@@ -23,11 +23,12 @@ void call_func(uint8_t number);
 /***** MASTER END *****/
 /***** SLAVE *****/
 
-typedef void(*funptr_t)();
-
+/*
 extern uint16_t *spi_proto_globals8[];
 extern uint8_t *spi_proto_globals16[];
 extern funptr_t spi_proto_funcs[];
+*/
+#include "spi_pointers.h"
 
 uint8_t spi_proto_needswrite(uint8_t opcode);
 uint16_t spi_proto_handlewrite(uint8_t opcode, uint8_t addr);
diff --git a/firmware/slavechip/Makefile b/firmware/slavechip/Makefile
index c59e510..aff2bd3 100644
--- a/firmware/slavechip/Makefile
+++ b/firmware/slavechip/Makefile
@@ -2,7 +2,7 @@ include ../Makefile.inc
 
 COMPILE = avr-gcc $(CFLAGS) $(DEFINES)
 
-OBJECTS = main.o mcp_adc.o i2c_simple.o softtimer.o spi_proto.o spi.o
+OBJECTS = main.o mcp_adc.o i2c_simple.o softtimer.o spi_proto.o spi.o spi_pointers.o
 
 # symbolic targets:
 all:	firmware.hex
diff --git a/firmware/slavechip/spi_pointers.c b/firmware/slavechip/spi_pointers.c
new file mode 100644
index 0000000..f2835a2
--- /dev/null
+++ b/firmware/slavechip/spi_pointers.c
@@ -0,0 +1,17 @@
+
+#include "spi_pointers.h"
+#include "main.h"
+
+uint16_t *spi_proto_globals8[] = {
+                                  &foo
+                                 };
+uint8_t *spi_proto_globals16[] = {
+                                  &bar
+                                 };
+funptr_t spi_proto_funcs[] = {
+                             &baz
+                             };
+
+
+
+
diff --git a/firmware/slavechip/spi_pointers.h b/firmware/slavechip/spi_pointers.h
new file mode 100644
index 0000000..dd33677
--- /dev/null
+++ b/firmware/slavechip/spi_pointers.h
@@ -0,0 +1,15 @@
+#ifndef __SPI_POINTERS_H
+#define __SPI_POINTERS_H
+
+#include <stdint.h>
+
+typedef void(*funptr_t)();
+
+extern uint16_t *spi_proto_globals8[];
+extern uint8_t *spi_proto_globals16[];
+extern funptr_t spi_proto_funcs[];
+
+
+#endif //__SPI_POINTERS_H
+
+