Specifications

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Software

CMX-Scheduler™ for dsPIC

DSC Devices

CMX-Scheduler is the result of a special collaboration

between CMX and Microchip. Available in object code

only, CMX-Scheduler is available for FREE to

embedded systems designers using the dsPIC

digital

signal controllers. CMX-Scheduler is specially

designed for developers whose designs do not require

a full blown RTOS and/or who are wondering if a kernel

might help their application. The perfect entry-level

kernel, CMX-Scheduler is intuitive to use and easy to

implement.

CMX-Scheduler offers many growth paths for future

designs. User applications developed with the

CMX-Scheduler kernel are upwardly compatible with

the popular CMX-Tiny+™ or CMX-RTX™ RTOSes.

CMX-Scheduler also is tightly integrated with the

unique CMX-MicroNet™ TCP/IP stack for those

applications that require networking connectivity.

CMX-Scheduler software and documentation is

delivered in electronic format and is freely licensed for

unlimited product usage on the dsPIC DSC devices.

Features

• FREE for use on any dsPIC DSC device

• Easy to learn and use

• Truly preemptive kernel

• Supports up to five tasks

• Fast performance

• Free bug fixes and updates

• No royalties on shipped products

• Compatible with CMX-Tiny+ and CMX-RTX

• Complete electronic documentation

• Integrated with CMX-MicroNet for optional

networking connectivity

CMX-Scheduler Specifications for

dsPIC

DSC Products

• All CMX Functions: 972 bytes

• CMX Initialize Module: 153 bytes

• CMX Assembly Module: 567 bytes

• RAM, Each Task Control Block: 11 bytes

• Flash, Each Task Control Block: 5 bytes:

- Min. Context Switch: 81 cycles

(starting a task)

- 102 cycles (resuming a task)

• CMX functions are contained in a library, thus

reducing code size, if not referenced

Functionality

• K_Task_Create – creates a task

• K_Task_Start – starts a task

• K_Task_Wake – wakes a task

• K_Task_Wait – has a task wait with/without a

time-out

• K_Task_Kill – Deletes a task

• K_Task_Coop_Sched – performs a cooperative

task switch

• K_Event_Wait – waits on an event

• K_Event_Signal – signals an event from a task

• K_Event_Signal – signals an event from an

interrupt

Ordering Information:

SW300030 CMX-Scheduler™ for dsPIC

DSC Devices (Free download: www.cmx.com/microchip)

DS51439

“CMX-Scheduler

™

for dsPIC

DSC Devices Product Overview”

(Available at: www.microchip.com)