From c46db07f2668801914bb0a6656a0a64e6d30da42 Mon Sep 17 00:00:00 2001
From: Michael Moon <triffid.hunter@gmail.com>
Date: Sun, 12 Sep 2010 12:33:12 +1000
Subject: [PATCH] separate ringbuffers no longer necessary as pointed out by
 jakepoz

---
 ringbuffer.c | 88 ----------------------------------------------------
 ringbuffer.h | 33 --------------------
 serial.c     |  3 +-
 3 files changed, 2 insertions(+), 122 deletions(-)
 delete mode 100644 ringbuffer.c
 delete mode 100644 ringbuffer.h

diff --git a/ringbuffer.c b/ringbuffer.c
deleted file mode 100644
index 2f2636e..0000000
--- a/ringbuffer.c
+++ /dev/null
@@ -1,88 +0,0 @@
-#include	"ringbuffer.h"
-
-RB_BITS _rb_mod(RB_BITS num, RB_BITS denom)
-{
-	for (; num >= denom; num -= denom);
-	return num;
-}
-
-void ringbuffer_init(ringbuffer *buf, RB_BITS bufsize)
-{
-	buf->read_pointer = 0;
-	buf->write_pointer = 0;
-	buf->size = bufsize - sizeof(ringbuffer);
-}
-
-RB_BITS ringbuffer_canread(ringbuffer *buf)
-{
-	return _rb_mod(buf->size + buf->write_pointer - buf->read_pointer, buf->size);
-}
-
-RB_BITS ringbuffer_canwrite(ringbuffer *buf)
-{
-	return _rb_mod(buf->size + buf->size + buf->read_pointer - buf->write_pointer - 1, buf->size);
-}
-
-uint8_t ringbuffer_readchar(ringbuffer *buf)
-{
-	uint8_t r = 0;
-	if (ringbuffer_canread(buf))
-	{
-		r = buf->data[buf->read_pointer];
-		buf->read_pointer = _rb_mod(buf->read_pointer + 1, buf->size);
-	}
-	return r;
-}
-
-void ringbuffer_writechar(ringbuffer *buf, uint8_t data)
-{
-	if (ringbuffer_canwrite(buf))
-	{
-		buf->data[buf->write_pointer] = data;
-		buf->write_pointer = _rb_mod(buf->write_pointer + 1, buf->size);
-	}
-}
-
-uint8_t ringbuffer_peekchar(ringbuffer *buf, RB_BITS index)
-{
-	return buf->data[_rb_mod(buf->read_pointer + index, buf->size)];
-}
-
-RB_BITS ringbuffer_readblock(ringbuffer *buf, uint8_t *newbuf, RB_BITS size)
-{
-	RB_BITS nc, i;
-	uint8_t *rp, *ms;
-	if ((nc = ringbuffer_canread(buf)) < size)
-		size = nc;
-	if (size)
-	{
-		for (i = 0, rp = ((uint8_t *) buf->data + buf->read_pointer), ms = ((uint8_t *) buf->data + buf->size); i < size; i++, rp++)
-		{
-			if (rp >= ms)
-				rp = (uint8_t *) buf->data;
-			newbuf[i] = *rp;
-		}
-		buf->read_pointer = rp - buf->data;
-	}
-	return size;
-}
-
-RB_BITS ringbuffer_writeblock(ringbuffer *buf, uint8_t *data, RB_BITS size)
-{
-	RB_BITS nc, i;
-	uint8_t	*wp, *ms;
-
-	if ((nc = ringbuffer_canwrite(buf)) < size)
-		size = nc;
-	if (size)
-	{
-		for (i = 0, wp = (uint8_t *) (buf->write_pointer + buf->data), ms = (uint8_t *) (buf->data + buf->size); i < size; i++, wp++)
-		{
-			if (wp >= ms)
-				wp = (uint8_t *) buf->data;
-			*wp = data[i];
-		}
-		buf->write_pointer = wp - buf->data;
-	}
-	return size;
-}
diff --git a/ringbuffer.h b/ringbuffer.h
deleted file mode 100644
index a5dd28c..0000000
--- a/ringbuffer.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef	_RINGBUFFER_H
-#define	_RINGBUFFER_H
-
-#include	<stdint.h>
-#include	<avr/interrupt.h>
-
-// ringbuffer head/tail/length precision. change to uint16_t if you want a buffer bigger than 250 bytes or so
-#define	RB_BITS	uint8_t
-
-typedef struct {
-	volatile RB_BITS		read_pointer;
-	volatile RB_BITS		write_pointer;
-	volatile RB_BITS		size;
-	volatile uint8_t		data[];
-} ringbuffer;
-
-// initialize a ringbuffer
-void ringbuffer_init(ringbuffer *buf, RB_BITS bufsize);
-
-// return how many bytes can be read or written
-RB_BITS ringbuffer_canread(ringbuffer *buf);
-RB_BITS ringbuffer_canwrite(ringbuffer *buf);
-
-// read bytes
-uint8_t ringbuffer_readchar(ringbuffer *buf);
-uint8_t ringbuffer_peekchar(ringbuffer *buf, RB_BITS index);
-RB_BITS ringbuffer_readblock(ringbuffer *buf, uint8_t *newbuf, RB_BITS size);
-
-// write bytes
-void ringbuffer_writechar(ringbuffer *buf, uint8_t data);
-RB_BITS ringbuffer_writeblock(ringbuffer *buf, uint8_t *data, RB_BITS size);
-
-#endif	/* _RINGBUFFER_H */
diff --git a/serial.c b/serial.c
index 4141dfb..732fb2f 100644
--- a/serial.c
+++ b/serial.c
@@ -1,6 +1,7 @@
 #include	"serial.h"
 
-#include	"ringbuffer.h"
+#include	<avr/interrupt.h>
+
 #include	"arduino.h"
 
 #define		BUFSIZE			64