emWin upgrade     Trade-In program     Web shop
Flag icon Head office Germany
Flag icon US office

ISO 9001 certified

PIC18, Microchip

embOS for PIC18 was developed for and with Microchip's compiler version 3.32 and supports all memory models offered by this compiler. It comes with easy to use start projects for Microchip's MPLAB workbench.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
RAM usage per task control block 21 bytes
RAM usage per resource semaphore 7 bytes
RAM usage per counting semaphore 4 bytes
RAM usage per mailbox 11 bytes
RAM usage per software timer 10 bytes
RAM usage event 10 bytes
Min. stack-size per task (RAM) 90 bytes
Context switch time 27.4 µs, independent of number of tasks
Interrupt latency time Zero
Kernel CPU usage/TICK Less than .2% of total calculation time at 1000 interrupts/second (1ms TICK)
Basic time unit (TICK) Typ. 1 ms, min. 20 µs (50 kHz interrupt frequency)
Max. no. of tasks Unlimited (by available RAM only)
Max. no. of mailboxes Unlimited (by available RAM only)
Max. no. of semaphores 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 PIC18 CPU running at 10MHz.

Board support packages

embOS comes with lots of ready to go start projects and support packages for various PIC18 CPUs and starterboards.

CPU Eval board
Microchip PIC18F87J11 Microchip Explorer 2 - PIC18
Microchip PIC18F8722 Microchip Explorer 2 - PIC18