mirror of https://github.com/ARMmbed/mbed-os.git
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "RawSerial.h"
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#include "wait_api.h"
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#include <cstdarg>
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#if DEVICE_SERIAL
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#define STRING_STACK_LIMIT 120
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namespace mbed {
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RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
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}
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int RawSerial::getc() {
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return _base_getc();
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}
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int RawSerial::putc(int c) {
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return _base_putc(c);
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}
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int RawSerial::puts(const char *str) {
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while (*str)
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putc(*str ++);
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return 0;
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}
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// Experimental support for printf in RawSerial. No Stream inheritance
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// means we can't call printf() directly, so we use sprintf() instead.
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// We only call malloc() for the sprintf() buffer if the buffer
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// length is above a certain threshold, otherwise we use just the stack.
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int RawSerial::printf(const char *format, ...) {
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std::va_list arg;
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va_start(arg, format);
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int len = vsnprintf(NULL, 0, format, arg);
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if (len < STRING_STACK_LIMIT) {
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char temp[STRING_STACK_LIMIT];
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vsprintf(temp, format, arg);
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puts(temp);
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} else {
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char *temp = new char[len + 1];
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vsprintf(temp, format, arg);
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puts(temp);
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delete[] temp;
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}
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va_end(arg);
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return len;
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}
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} // namespace mbed
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#endif
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