Chau Vo / mbed-dev

mbed library sources. Supersedes mbed-src. RTC working even after reset

Fork of mbed-dev by mbed official

common/RawSerial.cpp@148:161ebc35dc3a, 2016-09-28 (annotated)

Committer:
olympux
Date:
Wed Sep 28 20:59:47 2016 +0000
Revision:
148:161ebc35dc3a
Parent:
144:ef7eb2e8f9f7 
RTC working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "RawSerial.h"
<> 144:ef7eb2e8f9f7 17 #include "wait_api.h"
<> 144:ef7eb2e8f9f7 18 #include <cstdarg>
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 #if DEVICE_SERIAL
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 #define STRING_STACK_LIMIT 120
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 namespace mbed {
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
<> 144:ef7eb2e8f9f7 27 // No lock needed in the constructor
<> 144:ef7eb2e8f9f7 28 }
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 int RawSerial::getc() {
<> 144:ef7eb2e8f9f7 31 lock();
<> 144:ef7eb2e8f9f7 32 int ret = _base_getc();
<> 144:ef7eb2e8f9f7 33 unlock();
<> 144:ef7eb2e8f9f7 34 return ret;
<> 144:ef7eb2e8f9f7 35 }
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 int RawSerial::putc(int c) {
<> 144:ef7eb2e8f9f7 38 lock();
<> 144:ef7eb2e8f9f7 39 int ret = _base_putc(c);
<> 144:ef7eb2e8f9f7 40 unlock();
<> 144:ef7eb2e8f9f7 41 return ret;
<> 144:ef7eb2e8f9f7 42 }
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 int RawSerial::puts(const char *str) {
<> 144:ef7eb2e8f9f7 45 lock();
<> 144:ef7eb2e8f9f7 46 while (*str)
<> 144:ef7eb2e8f9f7 47 putc(*str ++);
<> 144:ef7eb2e8f9f7 48 unlock();
<> 144:ef7eb2e8f9f7 49 return 0;
<> 144:ef7eb2e8f9f7 50 }
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 // Experimental support for printf in RawSerial. No Stream inheritance
<> 144:ef7eb2e8f9f7 53 // means we can't call printf() directly, so we use sprintf() instead.
<> 144:ef7eb2e8f9f7 54 // We only call malloc() for the sprintf() buffer if the buffer
<> 144:ef7eb2e8f9f7 55 // length is above a certain threshold, otherwise we use just the stack.
<> 144:ef7eb2e8f9f7 56 int RawSerial::printf(const char *format, ...) {
<> 144:ef7eb2e8f9f7 57 lock();
<> 144:ef7eb2e8f9f7 58 std::va_list arg;
<> 144:ef7eb2e8f9f7 59 va_start(arg, format);
<> 144:ef7eb2e8f9f7 60 // ARMCC microlib does not properly handle a size of 0.
<> 144:ef7eb2e8f9f7 61 // As a workaround supply a dummy buffer with a size of 1.
<> 144:ef7eb2e8f9f7 62 char dummy_buf[1];
<> 144:ef7eb2e8f9f7 63 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
<> 144:ef7eb2e8f9f7 64 if (len < STRING_STACK_LIMIT) {
<> 144:ef7eb2e8f9f7 65 char temp[STRING_STACK_LIMIT];
<> 144:ef7eb2e8f9f7 66 vsprintf(temp, format, arg);
<> 144:ef7eb2e8f9f7 67 puts(temp);
<> 144:ef7eb2e8f9f7 68 } else {
<> 144:ef7eb2e8f9f7 69 char *temp = new char[len + 1];
<> 144:ef7eb2e8f9f7 70 vsprintf(temp, format, arg);
<> 144:ef7eb2e8f9f7 71 puts(temp);
<> 144:ef7eb2e8f9f7 72 delete[] temp;
<> 144:ef7eb2e8f9f7 73 }
<> 144:ef7eb2e8f9f7 74 va_end(arg);
<> 144:ef7eb2e8f9f7 75 unlock();
<> 144:ef7eb2e8f9f7 76 return len;
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 /** Acquire exclusive access to this serial port
<> 144:ef7eb2e8f9f7 80 */
<> 144:ef7eb2e8f9f7 81 void RawSerial::lock() {
<> 144:ef7eb2e8f9f7 82 // No lock used - external synchronization required
<> 144:ef7eb2e8f9f7 83 }
<> 144:ef7eb2e8f9f7 84
<> 144:ef7eb2e8f9f7 85 /** Release exclusive access to this serial port
<> 144:ef7eb2e8f9f7 86 */
<> 144:ef7eb2e8f9f7 87 void RawSerial::unlock() {
<> 144:ef7eb2e8f9f7 88 // No lock used - external synchronization required
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 } // namespace mbed
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 #endif