BA / Mbed OS BaBoRo_test2

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mbed-os/drivers/RawSerial.cpp@0:02dd72d1d465, 2018-04-24 (annotated)

Committer:
borlanic
Date:
Tue Apr 24 11:45:18 2018 +0000
Revision:
0:02dd72d1d465
BaBoRo_test2 - backup 1

Who changed what in which revision?

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borlanic 0:02dd72d1d465 1 /* mbed Microcontroller Library
borlanic 0:02dd72d1d465 2 * Copyright (c) 2006-2013 ARM Limited
borlanic 0:02dd72d1d465 3 *
borlanic 0:02dd72d1d465 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:02dd72d1d465 5 * you may not use this file except in compliance with the License.
borlanic 0:02dd72d1d465 6 * You may obtain a copy of the License at
borlanic 0:02dd72d1d465 7 *
borlanic 0:02dd72d1d465 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:02dd72d1d465 9 *
borlanic 0:02dd72d1d465 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:02dd72d1d465 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:02dd72d1d465 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:02dd72d1d465 13 * See the License for the specific language governing permissions and
borlanic 0:02dd72d1d465 14 * limitations under the License.
borlanic 0:02dd72d1d465 15 */
borlanic 0:02dd72d1d465 16 #include "drivers/RawSerial.h"
borlanic 0:02dd72d1d465 17 #include "platform/mbed_wait_api.h"
borlanic 0:02dd72d1d465 18 #include <stdio.h>
borlanic 0:02dd72d1d465 19 #include <cstdarg>
borlanic 0:02dd72d1d465 20
borlanic 0:02dd72d1d465 21
borlanic 0:02dd72d1d465 22 #if DEVICE_SERIAL
borlanic 0:02dd72d1d465 23
borlanic 0:02dd72d1d465 24 #define STRING_STACK_LIMIT 120
borlanic 0:02dd72d1d465 25
borlanic 0:02dd72d1d465 26 namespace mbed {
borlanic 0:02dd72d1d465 27
borlanic 0:02dd72d1d465 28 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud) {
borlanic 0:02dd72d1d465 29 // No lock needed in the constructor
borlanic 0:02dd72d1d465 30 }
borlanic 0:02dd72d1d465 31
borlanic 0:02dd72d1d465 32 int RawSerial::getc() {
borlanic 0:02dd72d1d465 33 lock();
borlanic 0:02dd72d1d465 34 int ret = _base_getc();
borlanic 0:02dd72d1d465 35 unlock();
borlanic 0:02dd72d1d465 36 return ret;
borlanic 0:02dd72d1d465 37 }
borlanic 0:02dd72d1d465 38
borlanic 0:02dd72d1d465 39 int RawSerial::putc(int c) {
borlanic 0:02dd72d1d465 40 lock();
borlanic 0:02dd72d1d465 41 int ret = _base_putc(c);
borlanic 0:02dd72d1d465 42 unlock();
borlanic 0:02dd72d1d465 43 return ret;
borlanic 0:02dd72d1d465 44 }
borlanic 0:02dd72d1d465 45
borlanic 0:02dd72d1d465 46 int RawSerial::puts(const char *str) {
borlanic 0:02dd72d1d465 47 lock();
borlanic 0:02dd72d1d465 48 while (*str)
borlanic 0:02dd72d1d465 49 putc(*str ++);
borlanic 0:02dd72d1d465 50 unlock();
borlanic 0:02dd72d1d465 51 return 0;
borlanic 0:02dd72d1d465 52 }
borlanic 0:02dd72d1d465 53
borlanic 0:02dd72d1d465 54 // Experimental support for printf in RawSerial. No Stream inheritance
borlanic 0:02dd72d1d465 55 // means we can't call printf() directly, so we use sprintf() instead.
borlanic 0:02dd72d1d465 56 // We only call malloc() for the sprintf() buffer if the buffer
borlanic 0:02dd72d1d465 57 // length is above a certain threshold, otherwise we use just the stack.
borlanic 0:02dd72d1d465 58 int RawSerial::printf(const char *format, ...) {
borlanic 0:02dd72d1d465 59 lock();
borlanic 0:02dd72d1d465 60 std::va_list arg;
borlanic 0:02dd72d1d465 61 va_start(arg, format);
borlanic 0:02dd72d1d465 62 // ARMCC microlib does not properly handle a size of 0.
borlanic 0:02dd72d1d465 63 // As a workaround supply a dummy buffer with a size of 1.
borlanic 0:02dd72d1d465 64 char dummy_buf[1];
borlanic 0:02dd72d1d465 65 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
borlanic 0:02dd72d1d465 66 if (len < STRING_STACK_LIMIT) {
borlanic 0:02dd72d1d465 67 char temp[STRING_STACK_LIMIT];
borlanic 0:02dd72d1d465 68 vsprintf(temp, format, arg);
borlanic 0:02dd72d1d465 69 puts(temp);
borlanic 0:02dd72d1d465 70 } else {
borlanic 0:02dd72d1d465 71 char *temp = new char[len + 1];
borlanic 0:02dd72d1d465 72 vsprintf(temp, format, arg);
borlanic 0:02dd72d1d465 73 puts(temp);
borlanic 0:02dd72d1d465 74 delete[] temp;
borlanic 0:02dd72d1d465 75 }
borlanic 0:02dd72d1d465 76 va_end(arg);
borlanic 0:02dd72d1d465 77 unlock();
borlanic 0:02dd72d1d465 78 return len;
borlanic 0:02dd72d1d465 79 }
borlanic 0:02dd72d1d465 80
borlanic 0:02dd72d1d465 81 /** Acquire exclusive access to this serial port
borlanic 0:02dd72d1d465 82 */
borlanic 0:02dd72d1d465 83 void RawSerial::lock() {
borlanic 0:02dd72d1d465 84 // No lock used - external synchronization required
borlanic 0:02dd72d1d465 85 }
borlanic 0:02dd72d1d465 86
borlanic 0:02dd72d1d465 87 /** Release exclusive access to this serial port
borlanic 0:02dd72d1d465 88 */
borlanic 0:02dd72d1d465 89 void RawSerial::unlock() {
borlanic 0:02dd72d1d465 90 // No lock used - external synchronization required
borlanic 0:02dd72d1d465 91 }
borlanic 0:02dd72d1d465 92
borlanic 0:02dd72d1d465 93 } // namespace mbed
borlanic 0:02dd72d1d465 94
borlanic 0:02dd72d1d465 95 #endif