modified ringbuffer

ringbuf_small.c

@@ -14,7 +14,7 @@
  * PUT AND GET ARE NOT REENTRANT!
  */
 
-void ringbuf_init(ringbuf_t *rb, char* buf, int size){
+void ringbuf_init(ringbuf_t *rb, uint16_t * buf, uint8_t size){
     rb->startptr = buf;
     rb->size = size;
     rb->readpos = 0;
@@ -24,7 +24,7 @@ void ringbuf_init(ringbuf_t *rb, char* buf, int size){
 /* pushes a value onto the ringbuffer
  * returns 0 on success, 1 on buffer full
  */
-uint8_t ringbuf_put(ringbuf_t *rb, uint8_t value){
+uint8_t ringbuf_put(ringbuf_t *rb, uint16_t value){
     // calculate next ptr pos
     uint8_t next = rb->writepos + 1;
     if(next >= rb->size){
@@ -41,10 +41,10 @@ uint8_t ringbuf_put(ringbuf_t *rb, uint8_t value){
 }
 
 /* gets a value from the ringbuffer
- * returns value on success, -1 on buffer empty
+ * returns 0 on success, -1 on buffer empty
  */
-int16_t ringbuf_get(ringbuf_t *rb){
+int8_t ringbuf_get(ringbuf_t *rb, uint16_t* data){
-    uint8_t value;
+    //uint16_t value;
     uint8_t next;
     // calculate next ptr pos
     next = rb->readpos + 1;
@@ -55,12 +55,14 @@ int16_t ringbuf_get(ringbuf_t *rb){
     if(rb->readpos == rb->writepos){
         return(-1);
     }
-    value = *(rb->startptr + rb->readpos);
+    *data = *(rb->startptr + rb->readpos);
     rb->readpos = next;
-    return(value);
+    return(0);
 }
 
 
 
 
 
+
+

ringbuf_small.h

@@ -4,15 +4,15 @@
 #include <stdint.h>
 
 typedef struct {
-    char* startptr;
+    uint16_t* startptr;
-    uint8_t size;
+    uint16_t size;
-    uint8_t readpos;
+    uint16_t readpos;
-    uint8_t writepos;
+    uint16_t writepos;
 } ringbuf_t;
 
 
-void ringbuf_init(ringbuf_t* rb, char* buf, int size);
+void ringbuf_init(ringbuf_t* rb, uint16_t* buf, uint8_t size);
-uint8_t ringbuf_put(ringbuf_t *rb, uint8_t value);
+uint8_t ringbuf_put(ringbuf_t *rb, uint16_t value);
-int16_t ringbuf_get(ringbuf_t *rb);
+int8_t ringbuf_get(ringbuf_t *rb, uint16_t* data);
 
 #endif