Quality RTOS & Embedded Software

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


Which portISR should be used for ARM 9.

Posted by Ozzy Smith on November 14, 2012

I am starting a new port for an ARM9 Nucleus OS project to a FreeRTOS project. I am using the Rowley tools. Which portable folder should I use as a template?

\CrossWorks Projects\FreeRTOSV7.2.0\FreeRTOS\Source\portable\GCC\ARM7_LPC2000


\CrossWorks Projects\FreeRTOSV7.2.0\FreeRTOS\Source\portable\GCC\ARM7_LPC23xx

The seems the same with different names.. The LPC23xx usign Premptive as a naming convention will the other does not. They both seem to have the same code.



RE: Which portISR should be used for ARM 9.

Posted by Richard on November 14, 2012
While the ARM7 and ARM9 are very different in the hardware, to the kernel they look very similar if not the same. You could therefore use any of the ARM7 ports as a starting point. You will have to change the code that configures the timer to create a tick interrupt, and the code that handles the interrupt controller, as these differ across parts, but the rest should remain the same.

There is an ARM9 port, but probably only in the portable/iar directory, rather than the GCC directory.


[ 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