Diff: MODSERIAL.cpp

Revision:

0:f57cdee9f527

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MODSERIAL.cpp	Fri Sep 07 08:40:24 2018 +0000
@@ -0,0 +1,137 @@
+/*
+    Copyright (c) 2010 Andy Kirkham
+ 
+    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.
+    
+    @file          MODSERIAL.h 
+    @purpose       Extends Serial to provide fully buffered IO
+    @version       1.6
+    @date          Nov 2010
+    @author        Andy Kirkham    
+*/
+
+#include "MODSERIAL.h"
+#include "MACROS.h"
+
+namespace AjK {
+
+MODSERIAL::MODSERIAL( PinName tx, PinName rx, const char* name ) : Serial( tx, rx, name )
+{
+    init( MODSERIAL_DEFAULT_TX_BUFFER_SIZE, MODSERIAL_DEFAULT_RX_BUFFER_SIZE, rx );
+}
+
+MODSERIAL::MODSERIAL( PinName tx, PinName rx, int bufferSize, const char* name ) : Serial( tx, rx, name )
+{
+    init( bufferSize, bufferSize, rx );
+}
+
+MODSERIAL::MODSERIAL( PinName tx, PinName rx, int txSize, int rxSize, const char* name ) : Serial( tx, rx, name )
+{
+    init( txSize, rxSize, rx );
+}
+
+MODSERIAL::~MODSERIAL()
+{
+    disableIrq();
+    if ( buffer[0] != NULL) free((char *)buffer[0] );
+    if ( buffer[1] != NULL) free((char *)buffer[1] );    
+}
+
+bool 
+MODSERIAL::txBufferFull( void ) 
+{ 
+    return MODSERIAL_TX_BUFFER_FULL; 
+}
+
+bool 
+MODSERIAL::rxBufferFull( void ) 
+{ 
+    return MODSERIAL_RX_BUFFER_FULL; 
+}
+
+bool 
+MODSERIAL::txBufferEmpty( void ) 
+{ 
+    return MODSERIAL_TX_BUFFER_EMPTY; 
+}
+
+bool 
+MODSERIAL::rxBufferEmpty( void ) 
+{ 
+    return MODSERIAL_RX_BUFFER_EMPTY; 
+}
+
+bool 
+MODSERIAL::txIsBusy( void ) 
+{ 
+    return ( _LSR & ( 3UL << 5 ) == 0 ) ? true : false; 
+} 
+
+void
+MODSERIAL::disableIrq( void )
+{
+
+#ifdef __LPC11UXX_H__
+    NVIC_DisableIRQ( UART_IRQn );
+#else
+    switch( _serial.index ) {
+        case 0:   NVIC_DisableIRQ( UART0_IRQn ); break;
+        case 1:   NVIC_DisableIRQ( UART1_IRQn ); break;
+        case 2:   NVIC_DisableIRQ( UART2_IRQn ); break;
+        case 3:   NVIC_DisableIRQ( UART3_IRQn ); break;
+    }
+#endif
+}
+
+void
+MODSERIAL::enableIrq(void)
+{
+#ifdef __LPC11UXX_H__
+    NVIC_EnableIRQ( UART_IRQn );
+#else
+    switch( _serial.index ) {
+        case 0:   NVIC_EnableIRQ( UART0_IRQn ); break;
+        case 1:   NVIC_EnableIRQ( UART1_IRQn ); break;
+        case 2:   NVIC_EnableIRQ( UART2_IRQn ); break;
+        case 3:   NVIC_EnableIRQ( UART3_IRQn ); break;
+    }
+#endif
+}
+
+int 
+MODSERIAL::rxDiscardLastChar( void )
+{
+    // This function can only be called indirectly from
+    // an rxCallback function. Therefore, we know we 
+    // just placed a char into the buffer.
+    char c = buffer[RxIrq][buffer_in[RxIrq]];
+    
+    if (buffer_count[RxIrq]) {        
+        buffer_count[RxIrq]--;
+        buffer_in[RxIrq]--;
+        if (buffer_in[RxIrq] < 0) {
+            buffer_in[RxIrq] = buffer_size[RxIrq] - 1;
+        }
+    }
+    
+    return (int)c;
+}
+
+
+}; // namespace AjK ends