Maxim nexpaq / nexpaq_dev

Preliminary main mbed library for nexpaq development

hal/common/RawSerial.cpp@0:6c56fb4bc5f0, 2016-11-04 (annotated)

Committer:
nexpaq
Date:
Fri Nov 04 20:27:58 2016 +0000
Revision:
0:6c56fb4bc5f0
Moving to library for sharing updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 0:6c56fb4bc5f0 1 /* mbed Microcontroller Library
nexpaq 0:6c56fb4bc5f0 2 * Copyright (c) 2006-2013 ARM Limited
nexpaq 0:6c56fb4bc5f0 3 *
nexpaq 0:6c56fb4bc5f0 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 0:6c56fb4bc5f0 5 * you may not use this file except in compliance with the License.
nexpaq 0:6c56fb4bc5f0 6 * You may obtain a copy of the License at
nexpaq 0:6c56fb4bc5f0 7 *
nexpaq 0:6c56fb4bc5f0 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 0:6c56fb4bc5f0 9 *
nexpaq 0:6c56fb4bc5f0 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 0:6c56fb4bc5f0 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 0:6c56fb4bc5f0 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 0:6c56fb4bc5f0 13 * See the License for the specific language governing permissions and
nexpaq 0:6c56fb4bc5f0 14 * limitations under the License.
nexpaq 0:6c56fb4bc5f0 15 */
nexpaq 0:6c56fb4bc5f0 16 #include "RawSerial.h"
nexpaq 0:6c56fb4bc5f0 17 #include "wait_api.h"
nexpaq 0:6c56fb4bc5f0 18 #include <cstdarg>
nexpaq 0:6c56fb4bc5f0 19
nexpaq 0:6c56fb4bc5f0 20 #if DEVICE_SERIAL
nexpaq 0:6c56fb4bc5f0 21
nexpaq 0:6c56fb4bc5f0 22 #define STRING_STACK_LIMIT 120
nexpaq 0:6c56fb4bc5f0 23
nexpaq 0:6c56fb4bc5f0 24 namespace mbed {
nexpaq 0:6c56fb4bc5f0 25
nexpaq 0:6c56fb4bc5f0 26 RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
nexpaq 0:6c56fb4bc5f0 27 // No lock needed in the constructor
nexpaq 0:6c56fb4bc5f0 28 }
nexpaq 0:6c56fb4bc5f0 29
nexpaq 0:6c56fb4bc5f0 30 int RawSerial::getc() {
nexpaq 0:6c56fb4bc5f0 31 lock();
nexpaq 0:6c56fb4bc5f0 32 int ret = _base_getc();
nexpaq 0:6c56fb4bc5f0 33 unlock();
nexpaq 0:6c56fb4bc5f0 34 return ret;
nexpaq 0:6c56fb4bc5f0 35 }
nexpaq 0:6c56fb4bc5f0 36
nexpaq 0:6c56fb4bc5f0 37 int RawSerial::putc(int c) {
nexpaq 0:6c56fb4bc5f0 38 lock();
nexpaq 0:6c56fb4bc5f0 39 int ret = _base_putc(c);
nexpaq 0:6c56fb4bc5f0 40 unlock();
nexpaq 0:6c56fb4bc5f0 41 return ret;
nexpaq 0:6c56fb4bc5f0 42 }
nexpaq 0:6c56fb4bc5f0 43
nexpaq 0:6c56fb4bc5f0 44 int RawSerial::puts(const char *str) {
nexpaq 0:6c56fb4bc5f0 45 lock();
nexpaq 0:6c56fb4bc5f0 46 while (*str)
nexpaq 0:6c56fb4bc5f0 47 putc(*str ++);
nexpaq 0:6c56fb4bc5f0 48 unlock();
nexpaq 0:6c56fb4bc5f0 49 return 0;
nexpaq 0:6c56fb4bc5f0 50 }
nexpaq 0:6c56fb4bc5f0 51
nexpaq 0:6c56fb4bc5f0 52 // Experimental support for printf in RawSerial. No Stream inheritance
nexpaq 0:6c56fb4bc5f0 53 // means we can't call printf() directly, so we use sprintf() instead.
nexpaq 0:6c56fb4bc5f0 54 // We only call malloc() for the sprintf() buffer if the buffer
nexpaq 0:6c56fb4bc5f0 55 // length is above a certain threshold, otherwise we use just the stack.
nexpaq 0:6c56fb4bc5f0 56 int RawSerial::printf(const char *format, ...) {
nexpaq 0:6c56fb4bc5f0 57 lock();
nexpaq 0:6c56fb4bc5f0 58 std::va_list arg;
nexpaq 0:6c56fb4bc5f0 59 va_start(arg, format);
nexpaq 0:6c56fb4bc5f0 60 // ARMCC microlib does not properly handle a size of 0.
nexpaq 0:6c56fb4bc5f0 61 // As a workaround supply a dummy buffer with a size of 1.
nexpaq 0:6c56fb4bc5f0 62 char dummy_buf[1];
nexpaq 0:6c56fb4bc5f0 63 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
nexpaq 0:6c56fb4bc5f0 64 if (len < STRING_STACK_LIMIT) {
nexpaq 0:6c56fb4bc5f0 65 char temp[STRING_STACK_LIMIT];
nexpaq 0:6c56fb4bc5f0 66 vsprintf(temp, format, arg);
nexpaq 0:6c56fb4bc5f0 67 puts(temp);
nexpaq 0:6c56fb4bc5f0 68 } else {
nexpaq 0:6c56fb4bc5f0 69 char *temp = new char[len + 1];
nexpaq 0:6c56fb4bc5f0 70 vsprintf(temp, format, arg);
nexpaq 0:6c56fb4bc5f0 71 puts(temp);
nexpaq 0:6c56fb4bc5f0 72 delete[] temp;
nexpaq 0:6c56fb4bc5f0 73 }
nexpaq 0:6c56fb4bc5f0 74 va_end(arg);
nexpaq 0:6c56fb4bc5f0 75 unlock();
nexpaq 0:6c56fb4bc5f0 76 return len;
nexpaq 0:6c56fb4bc5f0 77 }
nexpaq 0:6c56fb4bc5f0 78
nexpaq 0:6c56fb4bc5f0 79 /** Acquire exclusive access to this serial port
nexpaq 0:6c56fb4bc5f0 80 */
nexpaq 0:6c56fb4bc5f0 81 void RawSerial::lock() {
nexpaq 0:6c56fb4bc5f0 82 // No lock used - external synchronization required
nexpaq 0:6c56fb4bc5f0 83 }
nexpaq 0:6c56fb4bc5f0 84
nexpaq 0:6c56fb4bc5f0 85 /** Release exclusive access to this serial port
nexpaq 0:6c56fb4bc5f0 86 */
nexpaq 0:6c56fb4bc5f0 87 void RawSerial::unlock() {
nexpaq 0:6c56fb4bc5f0 88 // No lock used - external synchronization required
nexpaq 0:6c56fb4bc5f0 89 }
nexpaq 0:6c56fb4bc5f0 90
nexpaq 0:6c56fb4bc5f0 91 } // namespace mbed
nexpaq 0:6c56fb4bc5f0 92
nexpaq 0:6c56fb4bc5f0 93 #endif