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https://github.com/tio/tio.git
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ee46686fb6
Many modern RS-485 serial devices such as the ones from FTDI already operate in RS-485 mode by default and will work with tio out of the box. However, there are some RS-232/485 devices which need to be switched from e.g. RS-232 to RS-485 mode to operate accordingly on the physical level. This commit implements the switching mechanism and interface required to enable RS-485 mode. It only works on Linux and with serial devices which use device drivers that support the Linux RS-485 control interface. The RS-485 feature is detailed via the following options: --rs-485 Enable RS-485 mode --rs-485-config <config> Set RS-485 configuration Set the RS-485 configuration using the following key or key value pair format in the configuration field: RTS_ON_SEND=value Set logical level (0 or 1) for RTS pin when sending RTS_AFTER_SEND=value Set logical level (0 or 1) for RTS pin after sending RTS_DELAY_BEFORE_SEND=value Set RTS delay (ms) before sending RTS_DELAY_AFTER_SEND=value Set RTS delay (ms) after sending RX_DURING_TX Receive data even while sending data If defining more than one key or key value pair, they must be comma separated. Example use: $ tio /dev/ttyUSB0 --rs-485 --rs-r485-config=RTS_DELAY_AFTER_SEND=50,RX_DURING_TX
82 lines
1.7 KiB
Meson
82 lines
1.7 KiB
Meson
project('tio', 'c',
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version : '2.0',
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license : [ 'GPL-2'],
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meson_version : '>= 0.53.2',
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default_options : [ 'warning_level=2', 'buildtype=release', 'c_std=gnu99' ]
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)
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# The tag date of the project_version(), update when the version bumps.
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version_date = '2022-07-23'
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# Test for dynamic baudrate configuration interface
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compiler = meson.get_compiler('c')
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enable_setspeed2 = false
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enable_iossiospeed = false
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if host_machine.system() != 'darwin'
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if compiler.check_header('asm-generic/ioctls.h')
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enable_setspeed2 = compiler.has_header_symbol('asm-generic/ioctls.h', 'TCGETS2')
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endif
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else
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if compiler.check_header('IOKit/serial/ioss.h')
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enable_iossiospeed = compiler.has_header_symbol('IOKit/serial/ioss.h', 'IOSSIOSPEED')
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endif
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endif
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# Test for supported baudrates
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test_baudrates = [
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0,
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50,
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75,
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110,
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134,
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150,
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200,
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300,
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600,
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1200,
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1800,
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2400,
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4800,
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7200,
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9600,
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14400,
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19200,
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28800,
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38400,
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57600,
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76800,
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115200,
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230400,
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460800,
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500000,
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576000,
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921600,
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1000000,
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1152000,
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1500000,
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2000000,
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2500000,
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3000000,
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3500000,
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4000000 ]
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baudrates = ''
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baudrate_cases = ''
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foreach rate : test_baudrates
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baudrate = rate.to_string()
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value = compiler.get_define('B' + baudrate, prefix: '#include <termios.h>')
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if value != ''
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baudrates = baudrates + baudrate + ' '
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baudrate_cases = baudrate_cases + ' case ' + baudrate + ': baudrate = B' + baudrate + '; break;'
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endif
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endforeach
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# Test for RS-485 support on Linux
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if host_machine.system() == 'linux'
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if compiler.check_header('linux/serial.h')
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enable_rs485 = compiler.has_header_symbol('sys/ioctl.h', 'TIOCSRS485')
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endif
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endif
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subdir('src')
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subdir('man')
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