james kain / Mbed 2 deprecated GPS_Incremental

JEK changes enabling proper recording of IMU/GPS datastrams - 02-APR-2013

Dependencies:   mbed

Fork of GPS_Incremental by Dan Matthews

MODSERIAL/GETC.cpp@9:b45feb91ba38, 2013-04-19 (annotated)

Committer:
jekain314
Date:
Fri Apr 19 16:21:27 2013 +0000
Revision:
9:b45feb91ba38
Parent:
0:c746ee34feae 
update to allow better imu gps data collection

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dannyman939 0:c746ee34feae 1 /*
dannyman939 0:c746ee34feae 2 Copyright (c) 2010 Andy Kirkham
dannyman939 0:c746ee34feae 3
dannyman939 0:c746ee34feae 4 Permission is hereby granted, free of charge, to any person obtaining a copy
dannyman939 0:c746ee34feae 5 of this software and associated documentation files (the "Software"), to deal
dannyman939 0:c746ee34feae 6 in the Software without restriction, including without limitation the rights
dannyman939 0:c746ee34feae 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
dannyman939 0:c746ee34feae 8 copies of the Software, and to permit persons to whom the Software is
dannyman939 0:c746ee34feae 9 furnished to do so, subject to the following conditions:
dannyman939 0:c746ee34feae 10
dannyman939 0:c746ee34feae 11 The above copyright notice and this permission notice shall be included in
dannyman939 0:c746ee34feae 12 all copies or substantial portions of the Software.
dannyman939 0:c746ee34feae 13
dannyman939 0:c746ee34feae 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dannyman939 0:c746ee34feae 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dannyman939 0:c746ee34feae 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
dannyman939 0:c746ee34feae 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dannyman939 0:c746ee34feae 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
dannyman939 0:c746ee34feae 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
dannyman939 0:c746ee34feae 20 THE SOFTWARE.
dannyman939 0:c746ee34feae 21 */
dannyman939 0:c746ee34feae 22
dannyman939 0:c746ee34feae 23 #include "MODSERIAL.h"
dannyman939 0:c746ee34feae 24 #include "MACROS.h"
dannyman939 0:c746ee34feae 25
dannyman939 0:c746ee34feae 26 namespace AjK {
dannyman939 0:c746ee34feae 27
dannyman939 0:c746ee34feae 28 int
dannyman939 0:c746ee34feae 29 MODSERIAL::__getc(bool block)
dannyman939 0:c746ee34feae 30 {
dannyman939 0:c746ee34feae 31 // If no buffer is in use fall back to standard RX FIFO usage.
dannyman939 0:c746ee34feae 32 // Note, we must block in this case and ignore bool "block"
dannyman939 0:c746ee34feae 33 // so as to maintain compat with Mbed Serial.
dannyman939 0:c746ee34feae 34 if (buffer_size[RxIrq] == 0 || buffer[RxIrq] == (char *)NULL) {
dannyman939 0:c746ee34feae 35 while(! MODSERIAL_RBR_HAS_DATA ) ;
dannyman939 0:c746ee34feae 36 return (int)(_RBR & 0xFF);
dannyman939 0:c746ee34feae 37 }
dannyman939 0:c746ee34feae 38
dannyman939 0:c746ee34feae 39 if (block) { while ( MODSERIAL_RX_BUFFER_EMPTY ) ; } // Blocks.
dannyman939 0:c746ee34feae 40 else if ( MODSERIAL_RX_BUFFER_EMPTY ) return -1;
dannyman939 0:c746ee34feae 41
dannyman939 0:c746ee34feae 42 int c = buffer[RxIrq][buffer_out[RxIrq]];
dannyman939 0:c746ee34feae 43 buffer_out[RxIrq]++;
dannyman939 0:c746ee34feae 44 if (buffer_out[RxIrq] >= buffer_size[RxIrq]) {
dannyman939 0:c746ee34feae 45 buffer_out[RxIrq] = 0;
dannyman939 0:c746ee34feae 46 }
dannyman939 0:c746ee34feae 47
dannyman939 0:c746ee34feae 48 // If we have made space in the RX Buffer then copy over
dannyman939 0:c746ee34feae 49 // any characters in the RX FIFO that my reside there.
dannyman939 0:c746ee34feae 50 // Temporarily disable the RX IRQ so that we do not re-enter
dannyman939 0:c746ee34feae 51 // it under interrupts.
dannyman939 0:c746ee34feae 52 if ( ! MODSERIAL_RX_BUFFER_FULL ) {
dannyman939 0:c746ee34feae 53 uint32_t ier = _IER;
dannyman939 0:c746ee34feae 54 _IER &= ~(1UL << 0);
dannyman939 0:c746ee34feae 55 isr_rx();
dannyman939 0:c746ee34feae 56 _IER = ier;
dannyman939 0:c746ee34feae 57 }
dannyman939 0:c746ee34feae 58
dannyman939 0:c746ee34feae 59 __disable_irq();
dannyman939 0:c746ee34feae 60 buffer_count[RxIrq]--;
dannyman939 0:c746ee34feae 61 __enable_irq();
dannyman939 0:c746ee34feae 62 return c;
dannyman939 0:c746ee34feae 63 }
dannyman939 0:c746ee34feae 64
dannyman939 0:c746ee34feae 65 }; // namespace AjK ends