Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


Serial port comunication on PC

Posted by Massimo Faugno on March 5, 2009
I'm trying to use freeRTOS on an old PC with DOS installed.
I am created two tasks:

xTaskCreate( vPLC_Task, "PLC", mainPLC_STACK_SIZE, NULL, tskIDLE_PRIORITY + 10, NULL );
xTaskCreate( vHMI_Task, "HMI", mainHMI_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );

Can I use in "PLC" task the functions "_bios_serialcom" of
"Watcom C" without necessarily creating a driver for the serial port?
Do I need some precaution?
Can I have problems?

Thanks to all

RE: Serial port comunication on PC

Posted by sotd on March 5, 2009
Dont no directly but some openwatcom bios calls leave interrupts enabled so a critical section is not always a possibility.

RE: Serial port comunication on PC

Posted by Massimo Faugno on March 6, 2009
Thanks sotd,
Have you any suggestions to create a little slave application that use
serial port without write driver?
This routine that runs in "PLC" task send data to a master when requested.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

Meet us at Embedded World. Hall 3A-525.

Hear from Richard Barry at Embedded World. Feb 28, 16:00, Hall 4-428.

Video: Watch James Gosling & Richard Barry at re:Invent, Las Vegas 2017.

FreeRTOS kernel V10.0.1 is available for immediate download. Now MIT licensed.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS