# USETYPES with le\_tty **URL:** \ **Category:** Uncategorized\ **Created:** [April 29, 2021, 7:24am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735 "2021-04-29T07:24:43Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![shommersom](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@shommersom](https://forum.legato.io/u/shommersom)\ **Post date:** [April 29, 2021, 7:24am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/1 "2021-04-29T07:24:43Z")
Hello I’m trying to create a layer over the le\_tty api but would like to use the Flowcontrol etc. defines. However when using ```nohighlight USETYPES le_tty; ``` I get the following error when attempting to generate the stub file: `IOError: [Errno 2] No such file or directory: u'le_tty.api'` Is this just not possible or am i doing something wrong? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [April 29, 2021, 8:21am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/2 "2021-04-29T08:21:53Z")
Can you attach your project here ---
**Author:** ![shommersom](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@shommersom](https://forum.legato.io/u/shommersom)\ **Post date:** [April 29, 2021, 8:57am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/3 "2021-04-29T08:57:35Z")
I’ve recreated the problem with a simplified solution: [UartTestProgram.zip](https://forum.legato.io/uploads/short-url/fSLwMt68uthe4xJY7zwVmXkTxxL.zip) (6.3 KB) I’m using Visual Studio Code and am selecting the ‘Legato: Generate API stub files’, then select the ‘uart.api’ then select ‘components/uart’ as the output folder. And then the following error is generated: ```auto > Executing task: ifgen --gen-server-stub /home/user/test/interfaces/uart.api --output-dir /home/user/test/components/uart < Traceback (most recent call last): File "/home/user/test/leaf-data/SWI-WP77/wp77-legato/bin/ifgen", line 364, in Main() File "/home/user/test/leaf-data/SWI-WP77/wp77-legato/bin/ifgen", line 259, in Main interface = interfaceParser.ParseCode(args.interfaceFile, importDirs, args.namePrefix) File "/home/user/.leaf/wp77-legato_19.11.2-202005290653/framework/tools/ifgen/interfaceParser.py", line 3049, in ParseCode iface = parser.apiDocument() File "/home/user/.leaf/wp77-legato_19.11.2-202005290653/framework/tools/ifgen/interfaceParser.py", line 2639, in apiDocument self.usetypesStmt() File "/home/user/.leaf/wp77-legato_19.11.2-202005290653/framework/tools/ifgen/interfaceParser.py", line 2492, in usetypesStmt self.iface.imports[basename] = ParseCode(fullFilename, self.searchPath) File "/home/user/.leaf/wp77-legato_19.11.2-202005290653/framework/tools/ifgen/interfaceParser.py", line 3036, in ParseCode fileStream = ANTLRFileStream(apiPath, 'utf-8') File "/home/user/.leaf/wp77-legato_19.11.2-202005290653/framework/tools/ifgen/antlr3/streams.py", line 544, in __init__ fp = codecs.open(fileName, 'rb', encoding) File "/usr/lib/python2.7/codecs.py", line 898, in open file = __builtin__.open(filename, mode, buffering) IOError: [Errno 2] No such file or directory: u'le_tty.api' The terminal process "/bin/bash '-c', 'ifgen --gen-server-stub /home/user/test/interfaces/uart.api --output-dir /home/user/test/components/uart'" terminated with exit code: 1. Terminal will be reused by tasks, press any key to close it. ``` ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [April 29, 2021, 9:15am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/4 "2021-04-29T09:15:26Z")
I don’t see this “le\_tty.api” in the legato source code, where do you find this file? ---
**Author:** ![shommersom](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@shommersom](https://forum.legato.io/u/shommersom)\ **Post date:** [April 29, 2021, 9:19am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/5 "2021-04-29T09:19:29Z")
I’m trying to include [tty API - Legato Docs](https://docs.legato.io/20_08/c_tty.html) the tty api from Legato ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [April 29, 2021, 9:28am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/6 "2021-04-29T09:28:12Z")
you can try this test app which will use those tty API > **[legato-af/apps/test/atServices/atServerIntegrationTest at master ·...](https://github.com/legatoproject/legato-af/tree/master/apps/test/atServices/atServerIntegrationTest)** > > master/apps/test/atServices/atServerIntegrationTest ---
**Author:** ![shommersom](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@shommersom](https://forum.legato.io/u/shommersom)\ **Post date:** [April 29, 2021, 9:48am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/7 "2021-04-29T09:48:23Z")
I think you misunderstand what it is I’m trying to do. I can use the tty api in my c code no problem. I however wish to make an api where someone can connect to one serial port from different applications/components and give them the option to change (amongst other things) the baudrate. To support this I want to make sure that the .api function uses the correct tty\_Speed\_t enumeration. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [April 29, 2021, 9:55am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/8 "2021-04-29T09:55:23Z")
then you need to make your own api file as i don’t see such “le\_tty.api” in the legato source code ---
**Author:** ![shommersom](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@shommersom](https://forum.legato.io/u/shommersom)\ **Post date:** [April 29, 2021, 10:00am UTC](https://forum.legato.io/t/usetypes-with-le-tty/5735/9 "2021-04-29T10:00:20Z")
That’s what i was afraid off, I was hoping to be able to reuse the tty\_Speed\_t enum in my .api file. But I’ll add this to my .api file instead and use that. ```auto ENUM Speed { SPEED_0 = 0, SPEED_50, SPEED_75, SPEED_110, SPEED_134, SPEED_150, SPEED_200, SPEED_300, SPEED_600, SPEED_1200, SPEED_1800, SPEED_2400, SPEED_4800, SPEED_9600, SPEED_19200, SPEED_38400, SPEED_57600, SPEED_115200, SPEED_230400, SPEED_460800, SPEED_500000, SPEED_576000, SPEED_921600, SPEED_1000000, SPEED_1152000, SPEED_1500000, SPEED_2000000, SPEED_2500000, SPEED_3000000, SPEED_3500000, SPEED_4000000 }; ``` And hope that this enum doesn’t change between versions should i update my Legato version. thanks for the information!