Quality RTOS & Embedded Software

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


USART Control Bug

Posted by fireb1423r on May 27, 2015

Hi, I'm try to write some code to do the control of USART on my SAM3. So I am using freertosusartwritepacket(); and wait for ist return. I set USETXACCESSMUTEX | USERXACCESSMUTEX|WAITTXCOMPLETE. The funktion comes back with STATUSOK and I toogel a gpio pin after that.

But now my problem. the funktion comes back before tx is finisched! So the pin gets toggelt before the tx is finished. I selected 125k Baud. What did i do worng?

USART Control Bug

Posted by rtel on May 27, 2015

Where did the function freertosusartwrite_packet() come from? I don't believe it is something we have supplied, but could be wrong.


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

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

Latest News

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


FreeRTOS and other embedded software careers at AWS.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Espressif ESP32

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

Xilinx Microblaze and Zynq partner