i2c read and write ring buffer

controller/ringbuffer.c

@@ -2,18 +2,20 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <stdio.h>
+
 #include "ringbuffer.h"
 
 void _ringBufferIncReader(struct ringBuffer *buf) {
-  buf->reader++;
-  if (buf->reader >= buf->capacity) {
+  buf->reader += buf->blockSize;
+  if (buf->reader >= buf->blocks * buf->blockSize) {
     buf->reader = 0;
   }
 }
 
 void _ringBufferIncWriter(struct ringBuffer *buf) {
-  buf->writer++;
-  if (buf->writer >= buf->capacity) {
+  buf->writer += buf->blockSize;
+  if (buf->writer >= buf->blocks * buf->blockSize) {
     buf->writer = 0;
   }
 
@@ -26,9 +28,10 @@ void _ringBufferIncWriter(struct ringBuffer *buf) {
   }
 }
 
-void ringBufferCreate(int capacity, struct ringBuffer *out) {
-  out->buffer = malloc(capacity * sizeof(uint8_t));
-  out->capacity = capacity;
+void ringBufferCreate(int blocks, size_t blockSize, struct ringBuffer *out) {
+  out->buffer = malloc(blocks * blockSize * sizeof(char));
+  out->blocks = blocks;
+  out->blockSize = blockSize;
   out->reader = 0;
   out->writer = 0;
 }
@@ -37,10 +40,10 @@ void ringBufferDestroy(struct ringBuffer *buf) {
   free(buf->buffer);
 }
 
-int ringBufferRead(struct ringBuffer *buf, uint8_t *out) {
+int ringBufferRead(struct ringBuffer *buf, char *out) {
   if (buf->reader != buf->writer) {
     // we have data to read
-    memcpy(out, &buf->buffer[buf->reader], sizeof(uint8_t));
+    memcpy(out, &buf->buffer[buf->reader], buf->blockSize * sizeof(char));
     _ringBufferIncReader(buf);
     return 0;
   } else {
@@ -49,7 +52,7 @@ int ringBufferRead(struct ringBuffer *buf, uint8_t *out) {
   }
 }
 
-void ringBufferWrite(struct ringBuffer *buf, uint8_t *in) {
-  memcpy(&buf->buffer[buf->writer], in, sizeof(uint8_t));
+void ringBufferWrite(struct ringBuffer *buf, char *in) {
+  memcpy(&buf->buffer[buf->writer], in, buf->blockSize * sizeof(char));
   _ringBufferIncWriter(buf);
 }