409e2f3701
The TERMIOS(3) function tcsendbreak() and the IOCTLs TCSBRK and TCSBRKP transmit a serial line Break. Previously NuttX included an extern declaration for tcsendbreak() and defines for TCSBRK and TCSBRKP but none of these were implemented. Attempting to build programs that called tcsendbreak() would fail with a linker error; attempting to use TCSBRK and TCSBRKP would result in an error at runtime. This changeset adds the tcsendbreak() function and handling for TCSBRK and TCSBRKP; tcsendbreak() is implemented in terms of TCSBRK. Both TCSBRK and TCSBRKP are implemented in terms of the BSD-compatible Break IOCTLs TIOCSBRK and TIOCCBRK, which must be provided by the lower half serial driver. Currently, not all lower half serial drivers in NuttX support these IOCTLs. Those that do implement them may need one or more Kconfig options to be set, such as `CONFIG_*_U[S]ART_BREAKS` and, on some architectures, a separate `CONFIG_*_SERIALBRK_BSDCOMPAT`. * drivers/serial/serial.c (uart_tcsendbreak): New function. (uart_ioctl): Implement TCSBRK and TCSBRKP. * libs/libc/termios/lib_tcsendbreak.c (): New file. * libs/libc/termios/Make.defs (CSRCS): Add lib_tcsendbreak.c to the build. Thanks to Xiang Xiao for PR feedback. Co-authored-by: Xiang Xiao <xiaoxiang781216@gmail.com>
34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
############################################################################
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# libs/libc/termios/Make.defs
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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# termios.h support requires file descriptors and that CONFIG_SERIAL_TERMIOS
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# is defined
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# Add the termios C files to the build
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CSRCS += lib_cfspeed.c lib_cfmakeraw.c lib_isatty.c lib_tcflush.c
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CSRCS += lib_tcdrain.c lib_tcflow.c lib_tcgetattr.c lib_tcsetattr.c
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CSRCS += lib_tcsendbreak.c lib_ttyname.c lib_ttynamer.c
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# Add the termios directory to the build
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DEPPATH += --dep-path termios
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VPATH += termios
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