Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

drivers/RawSerial.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16 #include "drivers/RawSerial.h"
dkato 0:f782d9c66c49 17 #include "platform/mbed_wait_api.h"
dkato 0:f782d9c66c49 18 #include <cstdarg>
dkato 0:f782d9c66c49 19
dkato 0:f782d9c66c49 20 #if DEVICE_SERIAL
dkato 0:f782d9c66c49 21
dkato 0:f782d9c66c49 22 #define STRING_STACK_LIMIT 120
dkato 0:f782d9c66c49 23
dkato 0:f782d9c66c49 24 namespace mbed {
dkato 0:f782d9c66c49 25
dkato 0:f782d9c66c49 26 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud) {
dkato 0:f782d9c66c49 27 // No lock needed in the constructor
dkato 0:f782d9c66c49 28 }
dkato 0:f782d9c66c49 29
dkato 0:f782d9c66c49 30 int RawSerial::getc() {
dkato 0:f782d9c66c49 31 lock();
dkato 0:f782d9c66c49 32 int ret = _base_getc();
dkato 0:f782d9c66c49 33 unlock();
dkato 0:f782d9c66c49 34 return ret;
dkato 0:f782d9c66c49 35 }
dkato 0:f782d9c66c49 36
dkato 0:f782d9c66c49 37 int RawSerial::putc(int c) {
dkato 0:f782d9c66c49 38 lock();
dkato 0:f782d9c66c49 39 int ret = _base_putc(c);
dkato 0:f782d9c66c49 40 unlock();
dkato 0:f782d9c66c49 41 return ret;
dkato 0:f782d9c66c49 42 }
dkato 0:f782d9c66c49 43
dkato 0:f782d9c66c49 44 int RawSerial::puts(const char *str) {
dkato 0:f782d9c66c49 45 lock();
dkato 0:f782d9c66c49 46 while (*str)
dkato 0:f782d9c66c49 47 putc(*str ++);
dkato 0:f782d9c66c49 48 unlock();
dkato 0:f782d9c66c49 49 return 0;
dkato 0:f782d9c66c49 50 }
dkato 0:f782d9c66c49 51
dkato 0:f782d9c66c49 52 // Experimental support for printf in RawSerial. No Stream inheritance
dkato 0:f782d9c66c49 53 // means we can't call printf() directly, so we use sprintf() instead.
dkato 0:f782d9c66c49 54 // We only call malloc() for the sprintf() buffer if the buffer
dkato 0:f782d9c66c49 55 // length is above a certain threshold, otherwise we use just the stack.
dkato 0:f782d9c66c49 56 int RawSerial::printf(const char *format, ...) {
dkato 0:f782d9c66c49 57 lock();
dkato 0:f782d9c66c49 58 std::va_list arg;
dkato 0:f782d9c66c49 59 va_start(arg, format);
dkato 0:f782d9c66c49 60 // ARMCC microlib does not properly handle a size of 0.
dkato 0:f782d9c66c49 61 // As a workaround supply a dummy buffer with a size of 1.
dkato 0:f782d9c66c49 62 char dummy_buf[1];
dkato 0:f782d9c66c49 63 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
dkato 0:f782d9c66c49 64 if (len < STRING_STACK_LIMIT) {
dkato 0:f782d9c66c49 65 char temp[STRING_STACK_LIMIT];
dkato 0:f782d9c66c49 66 vsprintf(temp, format, arg);
dkato 0:f782d9c66c49 67 puts(temp);
dkato 0:f782d9c66c49 68 } else {
dkato 0:f782d9c66c49 69 char *temp = new char[len + 1];
dkato 0:f782d9c66c49 70 vsprintf(temp, format, arg);
dkato 0:f782d9c66c49 71 puts(temp);
dkato 0:f782d9c66c49 72 delete[] temp;
dkato 0:f782d9c66c49 73 }
dkato 0:f782d9c66c49 74 va_end(arg);
dkato 0:f782d9c66c49 75 unlock();
dkato 0:f782d9c66c49 76 return len;
dkato 0:f782d9c66c49 77 }
dkato 0:f782d9c66c49 78
dkato 0:f782d9c66c49 79 /** Acquire exclusive access to this serial port
dkato 0:f782d9c66c49 80 */
dkato 0:f782d9c66c49 81 void RawSerial::lock() {
dkato 0:f782d9c66c49 82 // No lock used - external synchronization required
dkato 0:f782d9c66c49 83 }
dkato 0:f782d9c66c49 84
dkato 0:f782d9c66c49 85 /** Release exclusive access to this serial port
dkato 0:f782d9c66c49 86 */
dkato 0:f782d9c66c49 87 void RawSerial::unlock() {
dkato 0:f782d9c66c49 88 // No lock used - external synchronization required
dkato 0:f782d9c66c49 89 }
dkato 0:f782d9c66c49 90
dkato 0:f782d9c66c49 91 } // namespace mbed
dkato 0:f782d9c66c49 92
dkato 0:f782d9c66c49 93 #endif