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

STM32F107 CAN message handling from two separate CAN busses

Posted by dawgster on July 27, 2016

Hello! Currently I'm trying to handle the incoming messages from two CAN busses, with a handler for each bus. I have adapted some existing code to make those handlers run only once a semaphore is freed when a CAN interrupt is triggered. However the code guarded by the semaphores does unfortunatly not execute. Since I am very new to freertos i would appreciate your input on my code. I am using libopencm3. I have uploaded to relevant code here: https://github.com/dawg91/CanInterruptHandling with SystemStatus.c containing the handlers and interrupt routines and can_handling.c the initialization of the can busses. Thank you very much for your time!


STM32F107 CAN message handling from two separate CAN busses

Posted by rtel on July 27, 2016

First, are you sure the CAN drivers are working when you use them in a driver that is not using FreeRTOS. That would always be the first step. How you configure the CAN buses is outside the scope of the FreeRTOS forum though.

Second, there is nothing that immediately stands out as being wrong in the use of your semaphore, but it does appear that you have two tasks which are blocking on the same semaphore - is that the case? The semaphore will only unblock one of the tasks (the highest priority task if the tasks have different priorities, or the task that has been blocked the longest if both tasks have the same priority).


[ 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