ISR_TX.cpp

00001 /*
00002     Copyright (c) 2010 Andy Kirkham
00003 
00004     Permission is hereby granted, free of charge, to any person obtaining a copy
00005     of this software and associated documentation files (the "Software"), to deal
00006     in the Software without restriction, including without limitation the rights
00007     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008     copies of the Software, and to permit persons to whom the Software is
00009     furnished to do so, subject to the following conditions:
00010 
00011     The above copyright notice and this permission notice shall be included in
00012     all copies or substantial portions of the Software.
00013 
00014     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020     THE SOFTWARE.
00021 */
00022 
00023 #include "MODSERIAL.h"
00024 #include "MACROS.h"
00025 
00026 namespace AjK
00027 {
00028 
00029 void MODSERIAL::isr_tx(bool doCallback)
00030 { 
00031     if (TX_IRQ_ENABLED || MODSERIAL_TX_BUFFER_FULL ) {
00032         if (! _base || buffer_size[TxIrq] == 0 || buffer[TxIrq] == (char *)NULL) {
00033             _isr[TxIrq].call(&this->callbackInfo);
00034             return;
00035         }
00036 
00037         while (! MODSERIAL_TX_BUFFER_EMPTY && MODSERIAL_WRITABLE ) {
00038             MODSERIAL_WRITE_REG = txc = (uint8_t)(buffer[TxIrq][buffer_out[TxIrq]]);
00039             buffer_count[TxIrq]--;
00040             buffer_out[TxIrq]++;
00041             if (buffer_out[TxIrq] >= buffer_size[TxIrq]) {
00042                 buffer_out[TxIrq] = 0;
00043             }
00044             if (doCallback) _isr[TxIrq].call(&this->callbackInfo);
00045         }
00046 
00047         if ( MODSERIAL_TX_BUFFER_EMPTY ) {
00048             DISABLE_TX_IRQ;
00049             _isr[TxEmpty].call(&this->callbackInfo);
00050         }
00051 }
00052 }
00053 }; // namespace AjK ends
00054 
00055 
00056