mirror of https://github.com/ARMmbed/mbed-os.git
128 lines
2.6 KiB
C++
128 lines
2.6 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2019 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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 "drivers/UnbufferedSerial.h"
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#if DEVICE_SERIAL
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#include "platform/mbed_critical.h"
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namespace mbed {
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UnbufferedSerial::UnbufferedSerial(
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PinName tx,
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PinName rx,
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int baud
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) : SerialBase(tx, rx, baud)
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{
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// No lock needed in the constructor
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}
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UnbufferedSerial::UnbufferedSerial(
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const serial_pinmap_t &static_pinmap, int baud
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) : SerialBase(static_pinmap, baud)
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{
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// No lock needed in the constructor
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}
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ssize_t UnbufferedSerial::write(const void *buffer, size_t size)
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{
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const unsigned char *buf = static_cast<const unsigned char *>(buffer);
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if (size == 0) {
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return 0;
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}
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bool lock_api = !core_util_in_critical_section();
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if (lock_api) {
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lock();
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}
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for (size_t i = 0; i < size; i++) {
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_base_putc(buf[i]);
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}
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if (lock_api) {
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unlock();
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}
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return size;
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}
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ssize_t UnbufferedSerial::read(void *buffer, size_t size)
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{
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unsigned char *buf = static_cast<unsigned char *>(buffer);
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if (size == 0) {
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return 0;
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}
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lock();
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buf[0] = _base_getc();
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unlock();
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return 1;
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}
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short UnbufferedSerial::poll(short events) const
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{
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short revents = 0;
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if (
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(events & POLLIN)
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&& (const_cast <UnbufferedSerial *>(this))->SerialBase::readable()
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) {
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revents |= POLLIN;
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}
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if (
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(events & POLLOUT)
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&& (const_cast <UnbufferedSerial *>(this))->SerialBase::writeable()
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) {
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revents |= POLLOUT;
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}
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return revents;
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}
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int UnbufferedSerial::enable_input(bool enabled)
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{
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SerialBase::enable_input(enabled);
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return 0;
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}
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int UnbufferedSerial::enable_output(bool enabled)
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{
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SerialBase::enable_output(enabled);
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return 0;
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}
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#if DEVICE_SERIAL_FC
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void UnbufferedSerial::set_flow_control(Flow type, PinName flow1, PinName flow2)
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{
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lock();
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SerialBase::set_flow_control(type, flow1, flow2);
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unlock();
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}
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#endif // DEVICE_SERIAL_FC
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} // namespace mbed
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#endif // #if DEVICE_SERIAL
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