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


pic32mx440 timer interrupt issue

Posted by Toni on March 27, 2012
Hi All,
I'm working with a simple self made board with a pic32mx440f512h.
I started with a simple project defining 2 tasks (working with gpios).

Calling the vTaskStartScheduler, the second defined task runs just once, then the system hangs.
I've observed that, on the timer interrupt, the code jumps to vector 0 instead of vector 4.

Currently I've modified the xPortStartScheduler function (port.c) adding the following line at the very beginnig:


to enable the multivector mode.

Is that "fix" OK?


RE: pic32mx440 timer interrupt issue

Posted by Richard on March 28, 2012
I'm not sure, without digging the manual out, but the official demo does it by making a call to the Microchip library as follows:



RE: pic32mx440 timer interrupt issue

Posted by Toni on March 28, 2012
You're right, official demo uses the INTEnableSystemMultiVectoredInt().

And it also works for me.

Anyway I don't understand (I'm just a beginner) why this interrupt controller configuration is left to the user whereas the OS functions define all the other stuffs (like timer vector).

Many thanks.


[ 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