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Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466
Diff: mbed-os/platform/mbed_poll.h
- Revision:
- 0:8fdf9a60065b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/platform/mbed_poll.h Wed Oct 10 00:33:53 2018 +0000 @@ -0,0 +1,60 @@ +/* mbed Microcontroller Library + * Copyright (c) 2017 ARM Limited + * + * 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. + */ +#ifndef MBED_POLL_H +#define MBED_POLL_H + +#define POLLIN 0x0001 ///< Data may be read without blocking +#define POLLOUT 0x0010 ///< Data may be written without blocking +#define POLLERR 0x1000 ///< An error has occurred on the device or stream +#define POLLHUP 0x2000 ///< The device has been disconnected +#define POLLNVAL 0x4000 ///< The specified file handle value is invalid + +namespace mbed { + +class FileHandle; + +/** \addtogroup platform */ +/** @{*/ +/** + * \defgroup platform_poll poll functions + * @{ + */ + +struct pollfh { + FileHandle *fh; + short events; + short revents; +}; + +/** A mechanism to multiplex input/output over a set of file handles(file descriptors). + * For every file handle provided, poll() examines it for any events registered for that particular + * file handle. + * + * @param fhs an array of PollFh struct carrying a FileHandle and bitmasks of events + * @param nfhs number of file handles + * @param timeout timer value to timeout or -1 for loop forever + * + * @return number of file handles selected (for which revents is non-zero). 0 if timed out with nothing selected. -1 for error. + */ +int poll(pollfh fhs[], unsigned nfhs, int timeout); + +/**@}*/ + +/**@}*/ + +} // namespace mbed + +#endif //MBED_POLL_H