Quality RTOS & Embedded Software

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


PIC18 Port : anybody tried with USB f-w?

Posted by Lukasz Sokol on August 8, 2008
Hello Forum,

I've been looking at FreeRTOS and now plan to use it with PIC18F4550 as well as incorporating USB interface (with Microchip supplied USB FS Framework).

What would be the preferred way to 'link' (not in linker meaning - I mean rather 'connect') the two pieces together, so that FreeRTOS tasks can either receive or send USB transmission (take the HID as example - interrupt transfer mode)?

I think it culd be enough just to :
- create a USB xmit task
- another task being a 'HAL' (this and the above is more-or-less what the Microchip framework does - only as single minded program (no OS)
- the user tasks never use the USB xmit directly
- user tasks to HAL, and HAL to xmit connect with queues

So, efectively, having a layered model, the Microchip framework serving as a 'driver'.

Did anybody do something like this ever (use FreeRTOS and USB framework along each other)?

I wish to do it under Microchip MPLAB IDE 8.10, MPLAB C18, MCHPFSUSB 2.1.

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

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

Latest News

Version 10.1.0 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