embOS for Altera NIOS 2 CPUs and GNU tools

embOS for Altera NIOS 2 was developed for and with GNU tools. It comes with easy to use start project make files for GNU tools. Software development with JTAG debugger is possible.

Resources and performance data

Memory usage
Kernel size (ROM)	approx. 3000 bytes
Kernel RAM usage	TBD
RAM usage per task control block	TBD
RAM usage per resource semaphore	TBD
RAM usage per counting semaphore	TBD
RAM usage per mailbox	TBD
RAM usage per software timer	TBD
RAM usage event	0 bytes
Min. stack-size per task (RAM)	1200
Timing
Context switch time	TBD
Interrupt latency time	TBD
Kernel CPU usage/TICK	TBD
Basic time unit (TICK)	typ. 1 ms, min. 20 µs (50 kHz interrupt frequency)
Features
Max. no. of tasks	Unlimited (by available RAM only)
Max. no. of mailboxes	unlimited (by available RAM only)
Max. no. of semaphores (resource/binary/counting)	unlimited (by available RAM only)
Max. no. of software timers	unlimited (by available RAM only)
Max. no. of priorities	255
Stack size idle task (RAM)	0(no memory needed)
Nested interrupts	permitted
Task switches from within ISR	possible

Absolute values given above were measured with embOS release build on an NIOS Stratix CPU running at 50MHz.

embOSView offers system analysis during runtime

embOSView with NIOS 32 CPU

Available Emulators

GDB debugger with JTAG support

Additional information

Release Notes embOS NIOS for GNU tools