Diff: SerialPipe.cpp

Revision:

9:e7a5959ffae1

Child:

11:b084552b03fe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SerialPipe.cpp	Sun Nov 10 16:39:42 2013 +0000
@@ -0,0 +1,98 @@
+#pragma once 
+
+#include "SerialPipe.h"
+
+SerialPipe::SerialPipe(PinName tx, PinName rx, int rxSize, int txSize, const char* name) 
+    : Serial(tx,rx,name), _pipeRx(rxSize), _pipeTx(txSize)
+{
+    attach(this, &SerialPipe::rxIrqBuf, RxIrq);
+    attach(this, &SerialPipe::txIrqBuf, TxIrq);
+}
+
+SerialPipe::~SerialPipe(void)
+{
+    attach(NULL, RxIrq);
+    attach(NULL, TxIrq);
+}
+
+// tx channel
+int SerialPipe::put(const char* b, int s, bool t)    
+{ 
+    int c = 0;
+    while (s && t)
+    {
+        c += _pipeTx.put(b, s, false);
+        b ++;
+        s --;
+        // give a chance to start tx
+        __disable_irq();
+        txIrqBuf();
+        __enable_irq();
+    }
+    return c;
+}
+
+void SerialPipe::txIrqBuf(void)
+{
+    while (serial_writable(&_serial) && _pipeTx.readable())
+        serial_putc(&_serial, _pipeTx.getc());
+}
+
+// rx channel
+int SerialPipe::readable(void)                      
+{ 
+    return _pipeRx.readable(); 
+} 
+
+int SerialPipe::getc(void)                          
+{ 
+    return _pipeRx.getc(); 
+} 
+
+int SerialPipe::get(char* b, int s, bool t) 
+{ 
+    return _pipeRx.get(b,s,t); 
+}
+
+void SerialPipe::rxIrqBuf(void)
+{
+    while (serial_readable(&_serial))
+    {
+        char ch = serial_getc(&_serial);
+        if (_pipeRx.writeable())
+            _pipeRx.putc(ch);
+        else 
+            /* overflow */;
+    }
+}
+
+// -----------------------------------------------------------------------
+
+SerialPipeEx::SerialPipeEx(PinName tx, PinName rx, int rxSize, int txSize, const char* name) 
+    : SerialPipe(tx,rx,rxSize,txSize,name)
+{}
+
+int SerialPipeEx::getLine(char* b, int s)
+{
+    int o = 0;
+    int i = 0;
+    int l = _pipeRx.start();
+    while ((i < l) && (o < s))
+    {
+        int t = _pipeRx.next();
+        i ++;
+        if (t == '\r')     // terminate commands with carriage return
+        {
+             _pipeRx.done();
+             return o;          // if enter send the zero char
+        }
+        else if (t == '\n')     // skip/filter new line 
+             /* skip */;
+        else if (t != '\b')     // normal char (no backspace)
+            b[o++] = t;
+        else if (o > 0)         // backspace
+            o --;               // remove it
+    }
+    o = 0;
+    return WAIT;
+}