NuMaker Transfer data UART to Ethernet
Fork of Serial-to-Ethernet by
Diff: BufferSerial/MyUnbufferedSerial.cpp
- Revision:
- 6:014b1a469aed
diff -r b079098a3f0b -r 014b1a469aed BufferSerial/MyUnbufferedSerial.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BufferSerial/MyUnbufferedSerial.cpp Tue Mar 02 10:09:10 2021 +0800 @@ -0,0 +1,128 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2019 ARM Limited + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "MyUnbufferedSerial.h" +#if (MBED_MAJOR_VERSION >= 6) +#if DEVICE_SERIAL + +#include "platform/mbed_critical.h" + +namespace mbed { + +MyUnbufferedSerial::MyUnbufferedSerial( + PinName tx, + PinName rx, + int baud +) : SerialBase(tx, rx, baud) +{ + // No lock needed in the constructor +} + +MyUnbufferedSerial::MyUnbufferedSerial( + const serial_pinmap_t &static_pinmap, int baud +) : SerialBase(static_pinmap, baud) +{ + // No lock needed in the constructor +} + +ssize_t MyUnbufferedSerial::write(const void *buffer, size_t size) +{ + const unsigned char *buf = static_cast<const unsigned char *>(buffer); + + if (size == 0) { + return 0; + } + + bool lock_api = !core_util_in_critical_section(); + + if (lock_api) { + lock(); + } + + for (size_t i = 0; i < size; i++) { + _base_putc(buf[i]); + } + + if (lock_api) { + unlock(); + } + + return size; +} + +ssize_t MyUnbufferedSerial::read(void *buffer, size_t size) +{ + unsigned char *buf = static_cast<unsigned char *>(buffer); + + if (size == 0) { + return 0; + } + + lock(); + + buf[0] = _base_getc(); + + unlock(); + + return 1; +} + +short MyUnbufferedSerial::poll(short events) const +{ + short revents = 0; + if ( + (events & POLLIN) + && (const_cast <MyUnbufferedSerial *>(this))->SerialBase::readable() + ) { + revents |= POLLIN; + } + if ( + (events & POLLOUT) + && (const_cast <MyUnbufferedSerial *>(this))->SerialBase::writeable() + ) { + revents |= POLLOUT; + } + return revents; +} + +int MyUnbufferedSerial::enable_input(bool enabled) +{ + SerialBase::enable_input(enabled); + + return 0; +} + +int MyUnbufferedSerial::enable_output(bool enabled) +{ + SerialBase::enable_output(enabled); + + return 0; +} + +#if DEVICE_SERIAL_FC +void MyUnbufferedSerial::set_flow_control(Flow type, PinName flow1, PinName flow2) +{ + lock(); + SerialBase::set_flow_control(type, flow1, flow2); + unlock(); +} +#endif // DEVICE_SERIAL_FC + +} // namespace mbed + +#endif // #if DEVICE_SERIAL +#endif // (MBED_MAJOR_VERSION >= 6 ) \ No newline at end of file