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




Loading

Semaphore doesn't wait for blocktime

Posted by chaabanemalki on February 18, 2015

Hello,

I have a semaphore that at some point returns pdFALSE (0) immediately without waiting for the defined blocked time.

This is how my code looks like

~~~~~~ while ( condition ) { // Send DATA1 if (xSemaphoreTake( GSMRdy2SndbSemphore, FTP_TO ) == pdPASS ) { // Treat response;

}

} ~~~~~~

FTPTO is TickTypet type. and is initialized before starting the scheduler .

First I send DATA1, so the semaphore wait "FTPTO" seconds before returning pdFALSE. The code will send again DATA1 and the semaphore at this point will return 0 immediately without waiting FTPTO ? I'm not sure what might be the issue here ?

I'm using PIC32MX port and FreeRTOS V8.0.0. Below is the trace log view of the weird behavior I described above

Image and video hosting by TinyPic

Regards


Semaphore doesn't wait for blocktime

Posted by rtel on February 18, 2015

How is the trace log being generated? Are you using trace macros? If so, what is the behaviour if you remove the trace macros - the same or different? (by remove I mean don't define them so they get defined away to nothing an don't generate any code)

Regards.


Semaphore doesn't wait for blocktime

Posted by chaabanemalki on February 19, 2015

I use FreeRTOS+Trace library to generate this trace log. I'll try to disable it and try to see what would happen.


[ 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