Diff: CBuffer_SRAM.h

Revision:

1:5a261b6a88af

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CBuffer_SRAM.h	Fri Mar 08 14:00:38 2013 +0000
@@ -0,0 +1,65 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+/*
+ * Modified by 2013 Hiroshi Suga, MIT License
+ */
+
+#ifndef CIRCBUFFER_H_
+#define CIRCBUFFER_H_
+
+#define WINDOW_SIZE 64
+#define WINDOW_MASK 0x3f
+
+#include "SerRAM.h"
+
+class CircBuffer {
+public:
+    CircBuffer(int length);
+
+    bool isFull();
+
+    bool isEmpty();
+
+    bool queue(char k);
+    
+    void flush();
+    
+
+    uint32_t available();
+
+    uint32_t use();
+
+    bool dequeue(char * c);
+
+    void dump();
+
+private:
+    volatile uint32_t write;
+    volatile uint32_t read;
+    uint32_t size;
+    char buf_w[WINDOW_SIZE];
+    char buf_r[WINDOW_SIZE];
+
+    SerRAM * _ram;
+    uint32_t ram_addr;
+    uint32_t ram_w, ram_r;
+    
+    static int xalloc(int size);
+};
+
+#endif