Arthur Ganger / Mbed 2 deprecated Talking_Braille_SMS

A talking braille-input text message device!!

Dependencies:   Braille_In PinDetect mbed

MODSERIAL/GETC.cpp@1:4e1b66d0799f, 2012-10-12 (annotated)

Committer:
aganger3
Date:
Fri Oct 12 18:05:42 2012 +0000
Revision:
1:4e1b66d0799f
Parent:
0:c79379695e18 
Changed title in comment;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aganger3 0:c79379695e18 1 /*
aganger3 0:c79379695e18 2 Copyright (c) 2010 Andy Kirkham
aganger3 0:c79379695e18 3
aganger3 0:c79379695e18 4 Permission is hereby granted, free of charge, to any person obtaining a copy
aganger3 0:c79379695e18 5 of this software and associated documentation files (the "Software"), to deal
aganger3 0:c79379695e18 6 in the Software without restriction, including without limitation the rights
aganger3 0:c79379695e18 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
aganger3 0:c79379695e18 8 copies of the Software, and to permit persons to whom the Software is
aganger3 0:c79379695e18 9 furnished to do so, subject to the following conditions:
aganger3 0:c79379695e18 10
aganger3 0:c79379695e18 11 The above copyright notice and this permission notice shall be included in
aganger3 0:c79379695e18 12 all copies or substantial portions of the Software.
aganger3 0:c79379695e18 13
aganger3 0:c79379695e18 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
aganger3 0:c79379695e18 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
aganger3 0:c79379695e18 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
aganger3 0:c79379695e18 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
aganger3 0:c79379695e18 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
aganger3 0:c79379695e18 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
aganger3 0:c79379695e18 20 THE SOFTWARE.
aganger3 0:c79379695e18 21 */
aganger3 0:c79379695e18 22
aganger3 0:c79379695e18 23 #include "MODSERIAL.h"
aganger3 0:c79379695e18 24 #include "MACROS.h"
aganger3 0:c79379695e18 25
aganger3 0:c79379695e18 26 namespace AjK {
aganger3 0:c79379695e18 27
aganger3 0:c79379695e18 28 int
aganger3 0:c79379695e18 29 MODSERIAL::__getc(bool block)
aganger3 0:c79379695e18 30 {
aganger3 0:c79379695e18 31 // If no buffer is in use fall back to standard RX FIFO usage.
aganger3 0:c79379695e18 32 // Note, we must block in this case and ignore bool "block"
aganger3 0:c79379695e18 33 // so as to maintain compat with Mbed Serial.
aganger3 0:c79379695e18 34 if (buffer_size[RxIrq] == 0 || buffer[RxIrq] == (char *)NULL) {
aganger3 0:c79379695e18 35 while(! MODSERIAL_RBR_HAS_DATA ) ;
aganger3 0:c79379695e18 36 return (int)(_RBR & 0xFF);
aganger3 0:c79379695e18 37 }
aganger3 0:c79379695e18 38
aganger3 0:c79379695e18 39 if (block) { while ( MODSERIAL_RX_BUFFER_EMPTY ) ; } // Blocks.
aganger3 0:c79379695e18 40 else if ( MODSERIAL_RX_BUFFER_EMPTY ) return -1;
aganger3 0:c79379695e18 41
aganger3 0:c79379695e18 42 int c = buffer[RxIrq][buffer_out[RxIrq]];
aganger3 0:c79379695e18 43 buffer_out[RxIrq]++;
aganger3 0:c79379695e18 44 if (buffer_out[RxIrq] >= buffer_size[RxIrq]) {
aganger3 0:c79379695e18 45 buffer_out[RxIrq] = 0;
aganger3 0:c79379695e18 46 }
aganger3 0:c79379695e18 47
aganger3 0:c79379695e18 48 // If we have made space in the RX Buffer then copy over
aganger3 0:c79379695e18 49 // any characters in the RX FIFO that my reside there.
aganger3 0:c79379695e18 50 // Temporarily disable the RX IRQ so that we do not re-enter
aganger3 0:c79379695e18 51 // it under interrupts.
aganger3 0:c79379695e18 52 if ( ! MODSERIAL_RX_BUFFER_FULL ) {
aganger3 0:c79379695e18 53 uint32_t ier = _IER;
aganger3 0:c79379695e18 54 _IER &= ~(1UL << 0);
aganger3 0:c79379695e18 55 isr_rx();
aganger3 0:c79379695e18 56 _IER = ier;
aganger3 0:c79379695e18 57 }
aganger3 0:c79379695e18 58
aganger3 0:c79379695e18 59 buffer_count[RxIrq]--;
aganger3 0:c79379695e18 60 return c;
aganger3 0:c79379695e18 61 }
aganger3 0:c79379695e18 62
aganger3 0:c79379695e18 63 }; // namespace AjK ends