diff --git a/firmware/scaling.c b/firmware/calibrate.c
similarity index 100%
rename from firmware/scaling.c
rename to firmware/calibrate.c
diff --git a/firmware/scaling.h b/firmware/calibrate.h
similarity index 100%
rename from firmware/scaling.h
rename to firmware/calibrate.h
diff --git a/firmware/led.c b/firmware/led.c
index 19b52fa..bd7e5d8 100644
--- a/firmware/led.c
+++ b/firmware/led.c
@@ -1,5 +1,6 @@
 #include "config.h"
 #include "led.h"
+#include "timer.h"
 
 int16_t __led_pattern;
 
@@ -33,7 +34,7 @@ void led_init(void)
 }
 
 /* Set a pattern (8-bit binary pattern). */
-void led_pattern(int8_t pattern)
+void led_pattern(uint8_t pattern)
 {
 	__led_pattern = pattern;
 }
diff --git a/firmware/led.h b/firmware/led.h
index f64d6ef..d5e1e66 100644
--- a/firmware/led.h
+++ b/firmware/led.h
@@ -10,7 +10,7 @@ extern int16_t __led_pattern;
 void led_init(void);
 
 /* Set a pattern (8-bit binary pattern). */
-void led_pattern(int8_t pattern);
+void led_pattern(uint8_t pattern);
 
 static inline void led_on(void)
 {
diff --git a/firmware/mode_debug.c b/firmware/mode_debug.c
index 70d502e..07ebb79 100644
--- a/firmware/mode_debug.c
+++ b/firmware/mode_debug.c
@@ -5,7 +5,7 @@
 #include "timer.h"
 #include <stdio.h>
 #include <math.h>
-#include "scaling.h"
+#include "calibrate.h"
 #include "util.h"
 #include "led.h"
 #include "mode.h"
@@ -18,6 +18,8 @@ static int zero_adc = 0;
 
 void TISR_HANDLER(7)
 {
+#pragma warn FIXME
+#if 0
 	int16_t v;
 	float dac_current, i;
 
@@ -37,6 +39,7 @@ void TISR_HANDLER(7)
 		dac = current_to_dac(dac_current);
 		dac_write(dac);
 	}
+#endif
 }
 
 void sweep(void)
@@ -74,7 +77,7 @@ void run_debug(void)
 	timer_setup_16bit(7, TIMER_RATE, 1);
 	timer_set_priority(7, 6);
 
-	led_pattern(0x10101010);
+	led_pattern(0b10101010);
 
 	uart1_put_string("Zoom NILM Debug\r\n");
 
diff --git a/firmware/mode_normal.c b/firmware/mode_normal.c
index 87a6eaf..96d8f31 100644
--- a/firmware/mode_normal.c
+++ b/firmware/mode_normal.c
@@ -6,9 +6,10 @@
 #include "timer.h"
 #include <stdio.h>
 #include <math.h>
-#include "scaling.h"
+#include "calibrate.h"
 #include "util.h"
 #include "mode.h"
+#include "led.h"
 #include "zoom.h"
 
 int send_data = 0;
@@ -50,6 +51,8 @@ void TISR_HANDLER(5)
 	}
 
 	/* Convert ADC value to current */
+#pragma xxx
+#if 0
 	i = adc12_to_current(v);
 
 #if 0
@@ -68,6 +71,7 @@ void TISR_HANDLER(5)
 
 	/* Now send it out */
 	dac_cmd = current_to_dac(dac_current);
+#endif
 	dac_write(dac_cmd);
 
 	LATAbits.LATA9 = 0;
diff --git a/firmware/zoom.c b/firmware/zoom.c
index b5b5c09..c1b2d74 100644
--- a/firmware/zoom.c
+++ b/firmware/zoom.c
@@ -8,20 +8,6 @@
 #include "led.h"
 #include "mode.h"
 #include "zoom.h"
-#include "scaling.h"
-
-void degauss(void)
-{
-	return;
-#if 0
-	dac_write(65535); /* max */
-	msleep(25);
-	dac_write(0);     /* min */
-	msleep(25);
-	dac_write(32768); /* middle */
-	msleep(25);
-#endif
-}
 
 int main(void)
 {
@@ -34,7 +20,6 @@ int main(void)
 	/* debug output */
 	TRISAbits.TRISA9 = 0;
 
-	scaling_init();
 	adcext_init();
 	dac_init();
 	dac_write(32768);
diff --git a/firmware/zoom.mcp b/firmware/zoom.mcp
index d729993..cc4bccf 100644
--- a/firmware/zoom.mcp
+++ b/firmware/zoom.mcp
@@ -50,10 +50,10 @@ file_004=dac.c
 file_005=timer.c
 file_006=adcext.c
 file_007=adc.c
-file_008=scaling.c
-file_009=led.c
-file_010=mode_debug.c
-file_011=mode_normal.c
+file_008=led.c
+file_009=mode_debug.c
+file_010=mode_normal.c
+file_011=calibrate.c
 file_012=config.h
 file_013=uart.h
 file_014=util.h
@@ -61,10 +61,10 @@ file_015=dac.h
 file_016=timer.h
 file_017=adcext.h
 file_018=adc.h
-file_019=scaling.h
-file_020=led.h
-file_021=mode.h
-file_022=zoom.h
+file_019=led.h
+file_020=mode.h
+file_021=zoom.h
+file_022=calibrate.h
 file_023=p33fj256gp710.gld
 [SUITE_INFO]
 suite_guid={479DDE59-4D56-455E-855E-FFF59A3DB57E}