Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training



Posted by Joe on April 5, 2007
Hi @all,

I am using the Arm7-port with a lpc2290 uC from NXP.
I coded a message-passing framework with allocated buffers which adresses are passed with the message-queuing mechanism. But when i am calling the QueueSendFromISR during an interrupt, may be from an receive buffer indication of an uart-driver, i am not able do detect whether the buffer was sent or not because the QueueSendFromISR does not provide an error when the queue is full and the message was not sent during the ISR routine. But i dont't free the buffer after that error my memory will get a leakage.

does anybody have an solution for that problem ?


RE: SendQueueFromISR

Posted by Nobody/Anonymous on April 7, 2007
You could either define a function to check if the queue is full first (don't use the standard function as this uses critical sections)

int iIsQueueFullFromISR( xQueueHandle xQueue )
return ( pxQueue->uxMessagesWaiting == pxQueue->uxLength );

Or add another parameter to the queue send from isr function to return an error code.

RE: SendQueueFromISR

Posted by Joe on April 9, 2007
thanks for the proposal,

actually i use the uxQueueMessagesWaiting function to get the catually queued members and to compare it with the max number, but if you mean that i must not use this mechanism i will check your proposed way


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

Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.

Free TCP/IP and file system demos for the RTOS

Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

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

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

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

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists