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FreeRTOS - A FREE RTOS for small embedded real time systems

Royalty free, open source, source code

real time kernel, free development tools, free RTOS scheduler, RTOS free. Source code RTOS ports for MIPS, PIC32, ARM, ARM7, ARM9, Cortex-M3, PIC, PIC18, AVR, MegaAVR, x86, GNU, AMD, H8s, HCS12, RTOS free.

Microcontroller performance comparison, AVR, PIC, x86, etc.

Free RTOS implementation details with source code

FreeRTOS.org^TM Homepage

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FreeRTOS^TM is a portable, open source, mini Real Time Kernel - a free RTOS. This site shows how a complete real time system can be created from a Windows host using quality open source development tools (where available).

Free RTOS kernel
Free development tools (MIPS, ARM7, AMD, AVR and 8051 ports)
Free source code
No royalties
Sample pre-configured complete real time solutions
Cross development from a standard Windows host
Demo applications for selected single board computers

Latest info:

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FreeRTOS.org^TM V4.0.4 now available: Introduces an STR9 ARM9 port with embedded WEB server demo.
FreeRTOS.org^TM V4.0.3 now available: Adds IAR support for ARM Cortex-M3.
New support packages: Professional development and support packages are now available.

The FreeRTOS.org V4.0.x download includes pre-configured demo applications for Luminary Micros new ARM Cortex-M3 based LM3S102 microcontroller. The LM3S10x is the first commercially available Cortex-M3 microcontroller, and FreeRTOS.org is the first Cortex-M3 real time kernel available for production silicon! See the press release here.

In addition FreeRTOS.org V4.0.0 introduces co-routines - a new feature especially suited to RAM constrained embedded systems.

Existing ports:

Luminary Micro LM3S10x ARM Cortex-M3 based microcontrollers using both ARM Keil (RVDS) and GCC.
ST Microelectronics STR71x (ARM7), STR9 (ARM9) (STR711F, STR712F, etc.).
LPC2106, LPC2124 and LPC2129 (ARM7). Includes I2C driver source code. Demo's for Olimex and Keil hardware.
Renesas H8S2329 (Hitachi H8/S) with an EDK2329 demo.
Atmel AT91SAM7 family (AT91SAM7X256, AT91SAM7X128, AT91SAM7S32, AT91SAM7S64, AT91SAM7S128, AT91SAM7S256). Includes USB driver source code for the IAR Kickstart, plus uIP and lwIP embedded TCP/IP stack demos.
AT91FR40008 with an Embest ATEB40X demo.
MSP430 with a Softbaugh demo including LCD driver. MSPGCC and Rowley CrossWorks tools are supported.
HCS12 (MC9S12C32 small memory model and MC9S12DP256B banked memory model)
Cygnal 8051 / 8052
Microchip PICMicro (PIC18)
Atmel AVR (MegaAVR) with an STK500 demo.
RDC8822 Microcontroller (AMD embedded 186 clone) with demo for the Flashlite 186 SBC.
PC [running on top of FreeDOS or other DOS]
ColdFire - note this port is unsupported
Zilog Z80 (eZ80 Acclaim!) - note this port is unsupported
Xilinx Microblaze soft processor core running on a Virtex4 FPGA.
Tern Inc Ethernet Engine controller.
More microcontroller, development tools and single board computer ports here soon! Please contact me if you are interested in any other ports and are willing to supply a development kit for the purpose. C167, etc.

A demo application targeted for a particular single board computer is included for each port.

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