Quality RTOS & Embedded Software

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


Starting freeRTOS from a bootloader

Posted by ARMinator on May 17, 2010

My ARM7 board comes with a USB bootloader preloaded in flash. I am able to compile and run applications that are I can burn and invok in/to flash by the bootloader.

My application runs freeRTOS, so I would like freeRTOS to start booting once called by the bootloader. I have modified a demo loader file so the freeRTOS boot.s and the user application are relocated where the bootloader is expecting to load/find the user application. I use the GCC toolchain.

I can see the bootloader invoking the user application, since I can run the blinky tests from the main function. If I let the main function call vTaskStartScheduler then my board will not run any of the freeRTOS task (and will hang).

I added code to blink whenever a tick is announced, but it does not look like I am getting any interrupts. I am thinking the interrupt vectors are not configured properly...

Here are the only modification I made so far from the original demo folder:
- in ld file, changed "flash(rx) : ORIGIN = 0, LENGTH = 380K" to "flash(rx) : ORIGIN = 0x10000, LENGTH = 380K"

Anything else I should have done to configure the interrupts? Or is it a totally different issue I am seeing here?


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

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS v10.2.0 is available for immediate download. MIT licensed, and including RISC-V and ARMv8-M (Cortex-M33) demos.

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

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

Cadence Tensilica Cortes

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