dyn. memory alloc

include/memalloc.h

@@ -1,9 +1,12 @@
-#ifndef STATIC_ALLOC_H_
+#ifndef MEMALLOC_H_
-#define STATIC_ALLOC_H_
+#define MEMALLOC_H_
 
-void * static_alloc(uint32_t size);
 uint32_t static_alloc_used(void);
-
 uint32_t next_powerof2(uint32_t value);
 
-#endif /*STATIC_ALLOC_H_*/
+void * static_alloc(uint32_t size);
+
+void * alloc(uint32_t size);
+void free(void *p);
+
+#endif /*MEMALLOC_H_*/

main.c

@@ -26,7 +26,7 @@
 #include "at91_twi.h"
 
 #include "at91_tc1.h"
-#include "static_alloc.h"
+#include "memalloc.h"
 
 #include "board.h"
 #include <stdio.h>

src/at91_adc.c

@@ -22,7 +22,6 @@
 #include "AT91SAM7S256.h"
 #include "board.h"
 #include "at91_pitc.h"
-#include "static_alloc.h"
 
 static uint16_t adc_result[4];
 

src/at91_pitc.c

@@ -20,7 +20,7 @@
 #include "at91_pitc.h"
 #include "at91_sysc.h"
 #include "board.h"
-#include "static_alloc.h"
+#include "memalloc.h"
 
 /* PIV is 20bit -> min. 3Hz @48MHz MCK */
 #define HZ_TO_PIV(HZ) (MCK / (16 * HZ))

src/fifo.c

@@ -19,7 +19,7 @@
 #include "AT91SAM7S256.h"
 #include "atomic.h"
 #include "fifo.h"
-#include "static_alloc.h"
+#include "memalloc.h"
 
 #define FIFO_MASK(x) ((x)->size -1)
 
@@ -80,15 +80,15 @@ uint32_t fifo_rxpdc(struct fifo *fifo, AT91S_PDC *pdc, uint16_t maxsize)
 	/* account previous PDC transfer */
 	fifo->in += fifo->pdc_rx;
 
-	uint32_t free = fifo->size - fifo_used(fifo);
+	uint32_t left = fifo->size - fifo_used(fifo);
-	if (free) {
+	if (left) {
 		/* calc pointer for next transfer */
 		uint32_t first_idx = (fifo->in & FIFO_MASK(fifo));
 		pdc->PDC_RPR = (uint32_t)(fifo->buf + first_idx);
 
 		/* check for buffer end -> split transfer */
-		if (first_idx + free <= (fifo->size -1)) {
+		if (first_idx + left <= (fifo->size -1)) {
-			fifo->pdc_rx = free;
+			fifo->pdc_rx = left;
 		} else {
 			fifo->pdc_rx = fifo->size - first_idx;
 		}

src/memalloc.c

@@ -20,8 +20,9 @@
 #include <stdio.h>
 #include "AT91SAM7S256.h"
 #include "board.h"
-#include "static_alloc.h"
+#include "memalloc.h"
 
+// TODO: make generic version and find better place
 #define ALIGN(x) (((x) +3) & ~3)
 
 /* extern symbols, defined in ldscript */
@@ -91,7 +92,7 @@ static struct memchunk * alloc_add(uint32_t size)
 	struct memchunk *newblock = static_alloc(size);
 
 	/* struct at end of memory block */
-	struct memchunk *endblock = (void *)newblock + size - sizeof(struct memchunk);
+	struct memchunk *endblock = (void *)((uint32_t)newblock + size - sizeof(struct memchunk));
 
 	/* link between them */
 	newblock->next = endblock;
@@ -161,7 +162,7 @@ try_next:
 
 	/* if we split the chunk, the remaining piece must be large enough */
 	if (((uint32_t)GET_NEXT(found) - (uint32_t)found) > (size + 2 * sizeof(struct memchunk))) {
-		struct memchunk *end = (void *)found + size;
+		struct memchunk *end = (void *)((uint32_t)found + size);
 		end->next = SET_FLAGS(GET_NEXT(found), 0);
 		found->next = SET_FLAGS(end, FLAG_CHUNKINUSE);
 

src/telemetrie.c

@@ -21,6 +21,7 @@
 #include <string.h>
 #include "board.h"		// ARRAY_SIZE()
 #include "telemetrie.h"
+#include "memalloc.h"
 
 /* extern symbols, defined in ldscript */
 extern struct tdc_value _tdc_value_table;
@@ -60,16 +61,6 @@ int32_t tdc_transmit(uint32_t addr, const uint8_t *data, uint32_t size)
 	return -1;
 }
 
-
-static void * alloc(uint32_t size)
-{
-	return NULL;
-}
-
-static void free(void *p)
-{
-}
-
 /*
 void *blub = NULL;
 func(&blub);