Kev Mann / mbed-dev-OS5_10_4

RTC auf true

drivers/RawSerial.cpp@2:7aab896b1a3b, 2019-03-13 (annotated)

Committer:
kevman
Date:
Wed Mar 13 11:03:24 2019 +0000
Revision:
2:7aab896b1a3b
Parent:
0:38ceb79fef03 
2019-03-13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2006-2013 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 5 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 6 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 9 *
kevman 0:38ceb79fef03 10 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 11 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 13 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 14 * limitations under the License.
kevman 0:38ceb79fef03 15 */
kevman 0:38ceb79fef03 16 #include "drivers/RawSerial.h"
kevman 0:38ceb79fef03 17 #include "platform/mbed_wait_api.h"
kevman 0:38ceb79fef03 18 #include <stdio.h>
kevman 0:38ceb79fef03 19 #include <cstdarg>
kevman 0:38ceb79fef03 20
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 #if DEVICE_SERIAL
kevman 0:38ceb79fef03 23
kevman 0:38ceb79fef03 24 #define STRING_STACK_LIMIT 120
kevman 0:38ceb79fef03 25
kevman 0:38ceb79fef03 26 namespace mbed {
kevman 0:38ceb79fef03 27
kevman 0:38ceb79fef03 28 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud)
kevman 0:38ceb79fef03 29 {
kevman 0:38ceb79fef03 30 // No lock needed in the constructor
kevman 0:38ceb79fef03 31 }
kevman 0:38ceb79fef03 32
kevman 0:38ceb79fef03 33 int RawSerial::getc()
kevman 0:38ceb79fef03 34 {
kevman 0:38ceb79fef03 35 lock();
kevman 0:38ceb79fef03 36 int ret = _base_getc();
kevman 0:38ceb79fef03 37 unlock();
kevman 0:38ceb79fef03 38 return ret;
kevman 0:38ceb79fef03 39 }
kevman 0:38ceb79fef03 40
kevman 0:38ceb79fef03 41 int RawSerial::putc(int c)
kevman 0:38ceb79fef03 42 {
kevman 0:38ceb79fef03 43 lock();
kevman 0:38ceb79fef03 44 int ret = _base_putc(c);
kevman 0:38ceb79fef03 45 unlock();
kevman 0:38ceb79fef03 46 return ret;
kevman 0:38ceb79fef03 47 }
kevman 0:38ceb79fef03 48
kevman 0:38ceb79fef03 49 int RawSerial::puts(const char *str)
kevman 0:38ceb79fef03 50 {
kevman 0:38ceb79fef03 51 lock();
kevman 0:38ceb79fef03 52 while (*str) {
kevman 0:38ceb79fef03 53 putc(*str ++);
kevman 0:38ceb79fef03 54 }
kevman 0:38ceb79fef03 55 unlock();
kevman 0:38ceb79fef03 56 return 0;
kevman 0:38ceb79fef03 57 }
kevman 0:38ceb79fef03 58
kevman 0:38ceb79fef03 59 // Experimental support for printf in RawSerial. No Stream inheritance
kevman 0:38ceb79fef03 60 // means we can't call printf() directly, so we use sprintf() instead.
kevman 0:38ceb79fef03 61 // We only call malloc() for the sprintf() buffer if the buffer
kevman 0:38ceb79fef03 62 // length is above a certain threshold, otherwise we use just the stack.
kevman 0:38ceb79fef03 63 int RawSerial::printf(const char *format, ...)
kevman 0:38ceb79fef03 64 {
kevman 0:38ceb79fef03 65 lock();
kevman 0:38ceb79fef03 66 std::va_list arg;
kevman 0:38ceb79fef03 67 va_start(arg, format);
kevman 0:38ceb79fef03 68 // ARMCC microlib does not properly handle a size of 0.
kevman 0:38ceb79fef03 69 // As a workaround supply a dummy buffer with a size of 1.
kevman 0:38ceb79fef03 70 char dummy_buf[1];
kevman 0:38ceb79fef03 71 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
kevman 0:38ceb79fef03 72 if (len < STRING_STACK_LIMIT) {
kevman 0:38ceb79fef03 73 char temp[STRING_STACK_LIMIT];
kevman 0:38ceb79fef03 74 vsprintf(temp, format, arg);
kevman 0:38ceb79fef03 75 puts(temp);
kevman 0:38ceb79fef03 76 } else {
kevman 0:38ceb79fef03 77 char *temp = new char[len + 1];
kevman 0:38ceb79fef03 78 vsprintf(temp, format, arg);
kevman 0:38ceb79fef03 79 puts(temp);
kevman 0:38ceb79fef03 80 delete[] temp;
kevman 0:38ceb79fef03 81 }
kevman 0:38ceb79fef03 82 va_end(arg);
kevman 0:38ceb79fef03 83 unlock();
kevman 0:38ceb79fef03 84 return len;
kevman 0:38ceb79fef03 85 }
kevman 0:38ceb79fef03 86
kevman 0:38ceb79fef03 87 /** Acquire exclusive access to this serial port
kevman 0:38ceb79fef03 88 */
kevman 0:38ceb79fef03 89 void RawSerial::lock()
kevman 0:38ceb79fef03 90 {
kevman 0:38ceb79fef03 91 // No lock used - external synchronization required
kevman 0:38ceb79fef03 92 }
kevman 0:38ceb79fef03 93
kevman 0:38ceb79fef03 94 /** Release exclusive access to this serial port
kevman 0:38ceb79fef03 95 */
kevman 0:38ceb79fef03 96 void RawSerial::unlock()
kevman 0:38ceb79fef03 97 {
kevman 0:38ceb79fef03 98 // No lock used - external synchronization required
kevman 0:38ceb79fef03 99 }
kevman 0:38ceb79fef03 100
kevman 0:38ceb79fef03 101 } // namespace mbed
kevman 0:38ceb79fef03 102
kevman 0:38ceb79fef03 103 #endif