提交: 36a744c12ea00a90b1ccf8e169d76a1d6edcb11a - shared_foo (git)

テスト用のあれこれ共用フォルダ

Commit MetaInfo

• 修订版: 36a744c12ea00a90b1ccf8e169d76a1d6edcb11a (tree)
• 时间: 2018-02-28 22:19:13
• 作者: takemasa <suikan@user...>
• Commiter: takemasa

Log Message

Correct initialize processing.

更改概述

• modified: stm32_development/murasaki/murasaki/basefifo.cpp

差异

--- a/stm32_development/murasaki/murasaki/basefifo.cpp
+++ b/stm32_development/murasaki/murasaki/basefifo.cpp
@@ -19,6 +19,13 @@ BaseFifo::BaseFifo(unsigned int buffer_size):
     MURASAKI_ASSERT(size_of_buffer_ != 0);        // very explicit check
     MURASAKI_ASSERT(buffer_ != nullptr);
 
+    // set both pointer same value ( empty buffer ).
+    tail_ = head_ = 0;
+
+    // Clean up buffer.
+    // This is essential to outptu clear data when ReWind() is called at very initial stage.
+    ::memset(buffer_, ' ', size_of_buffer_);
+
 }
 
 
@@ -58,7 +65,7 @@ unsigned int BaseFifo::Put(uint8_t const data[], unsigned int size)
 
         // wrap around the head index;
         if (head_ >= size_of_buffer_)
-            head_ = 0;
+            head_ -= size_of_buffer_;
     }  // end for loop.
 
     return copy_size;
@@ -89,7 +96,7 @@ unsigned int BaseFifo::Get(uint8_t data[], unsigned int size)
 
         // if tail_ reaches the end, wrap around.
         if (tail_ >= size_of_buffer_)
-            tail_ = 0;
+            head_ -= size_of_buffer_;
     }
 
 
@@ -103,7 +110,7 @@ void BaseFifo::ReWind()
 
     // wrap arround;
     if (tail_ >= size_of_buffer_)
-        tail_ = 0;
+        head_ -= size_of_buffer_;
 }
 
 } /* namespace murasaki */