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Free real-time operating system designed for microcontrollers
Free, extremely simple, amazingly tiny and very fast real-time operating system (RTOS) designed for deeply embedded applications.
Target: ARM Cortex-M, STM8.
It was inspired by the concept of a state machine. Procedure executed by the task (task state) doesn't have to be noreturn-type. It will be executed into an infinite loop. There's a dedicated function for immediate change the task state.
Super lightweight task scheduler aimed at 8 bit AVR ATmega micro-controllers (perfect for Arduino), although it can easily be used on other hardware like Microchip PIC.
It uses simple round-robin scheduling so no priority levels can be set. You choose the time interval by calling dispatchTick(), this is usually in a timer interrupt.
Range for number of tasks: 0 to 255 tasks
Range for delay: 0 to 65535 ticks
Each task only uses 5 byte of RAM. The one task LED blink example only uses 5 bytes of RAM and 476 bytes of program memory for the whole program.
A simple Embedded System Framework that allows rapid development of applications build for AVR family. System is based on a super-loop architecture with check and skip (no-wait) flag event driver system.
Supports:
UART, SysTick Timer, ADC, SPI, EEPROM, PWM.
Also supports: Xilinx FPGA configuration, FPGA SSI interface, smart card reader etc.
Libcfu is a library of tools that I have found useful, particularly when developing multithreaded software. It includes a hash table, a linked list, self-extending strings, a config file parser, a simpletimer, a thread queue, and command-line parser.
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