diff --git a/include/at91_pitc.h b/include/at91_pitc.h
index 2763d3f..286a722 100644
--- a/include/at91_pitc.h
+++ b/include/at91_pitc.h
@@ -17,7 +17,6 @@ struct pitc_timer {
 };
 
 void pitc_schedule_timer(struct pitc_timer *timer);
-struct pitc_timer * alloc_pitc_timer(uint32_t interval, uint32_t (*func)(struct pitc_timer *), void *privdata);
 
 uint32_t pitc_get_ticks(void);
 void at91_pitc_init(void);
diff --git a/main.c b/main.c
index 476eaa9..e6fd27f 100644
--- a/main.c
+++ b/main.c
@@ -51,6 +51,11 @@ static uint32_t pitc_test(struct pitc_timer *timer)
 	return PITC_RESTART_TIMER;
 }
 
+static struct pitc_timer pitc_test_timer = {
+	.interval = 1,
+	.func = &pitc_test,
+};
+
 int main(void)
 {
 	/* LED outputs */
@@ -78,14 +83,13 @@ int main(void)
 	at91_twi_init();
 
 	/* usb */
-	at91_udp_init();
-
-	struct pitc_timer *pitc_test_timer = alloc_pitc_timer(1, &pitc_test, NULL);
-	pitc_schedule_timer(pitc_test_timer);
+//	at91_udp_init();
 
 	printf("static alloc: %5ld bytes\n\r", static_alloc_used());
 
 	at91_twi_test();
 
+	pitc_schedule_timer(&pitc_test_timer);
+
 	while (1);
 }
diff --git a/src/at91_adc.c b/src/at91_adc.c
index 0b93721..84b558c 100644
--- a/src/at91_adc.c
+++ b/src/at91_adc.c
@@ -44,6 +44,11 @@ static uint32_t adc_trigger(struct pitc_timer *timer)
 	return PITC_RESTART_TIMER;
 }
 
+static struct pitc_timer adc_timer = {
+	.interval = 100,
+	.func = &adc_trigger,
+};
+
 void at91_adc_test_init(void)
 {
 	/* enable ADC clock */
@@ -83,16 +88,5 @@ void at91_adc_test_init(void)
 	aic->AIC_SVR[AT91C_ID_ADC] = (uint32_t)at91_adc_isr;
 	aic->AIC_IECR = (1<<AT91C_ID_ADC);
 
-	/* schedule trigger */
-	struct pitc_timer *adc_timer = alloc_pitc_timer(100, &adc_trigger, NULL);
-	pitc_schedule_timer(adc_timer);
-}
-
-void at91_adc_printresults(void)
-{
-	uint8_t i;
-	for (i = 0; i < ARRAY_SIZE(adc_result); i++)
-		printf("%x:0x%03X ", i, adc_result[i]);
-
-	printf("\n");
+	pitc_schedule_timer(&adc_timer);
 }
diff --git a/src/at91_pitc.c b/src/at91_pitc.c
index f554268..95faddf 100644
--- a/src/at91_pitc.c
+++ b/src/at91_pitc.c
@@ -20,7 +20,6 @@
 #include "at91_pitc.h"
 #include "at91_sysc.h"
 #include "board.h"
-#include "memalloc.h"
 
 /* PIV is 20bit -> min. 3Hz @48MHz MCK */
 #define HZ_TO_PIV(HZ) (MCK / (16 * HZ))
@@ -28,16 +27,6 @@
 static LIST_HEAD(timer_list);
 volatile static uint32_t pitc_ticks;
 
-struct pitc_timer * alloc_pitc_timer(uint32_t interval, uint32_t (*func)(struct pitc_timer *), void *privdata)
-{
-	struct pitc_timer *timer = static_alloc(sizeof(struct pitc_timer));
-	timer->interval = interval;
-	timer->func = func;
-	timer->privdata = privdata;
-
-	return timer;
-}
-
 void pitc_schedule_timer(struct pitc_timer *timer)
 {
 	timer->nextrun = timer->interval + pitc_ticks;
diff --git a/src/memalloc.c b/src/memalloc.c
index 3976762..4d6afde 100644
--- a/src/memalloc.c
+++ b/src/memalloc.c
@@ -88,6 +88,8 @@ static struct memchunk * alloc_add(uint32_t size)
 {
 	size = ALIGN(size);
 
+	printf("alloc_add(%ld)\n\r", size);
+
 	/* struct at begin of memory block */
 	struct memchunk *newblock = static_alloc(size);
 
diff --git a/src/telemetrie.c b/src/telemetrie.c
index cf784e7..4df776c 100644
--- a/src/telemetrie.c
+++ b/src/telemetrie.c
@@ -32,6 +32,7 @@ extern struct tdc_value _tdc_value_table_end;
 /* max. 8x 32 = 256 variables */
 static uint32_t tdc_varmap[8];
 
+/* array of devices, that are used to reach address X */
 static struct comm_device *routing_table[8];
 
 /*