Tutorial for FRDM-KL25Z: Touch sensing demo featuring FreeMaster visualization tool

FreescaleTools_and_Software — Fri, 08 Oct 2021 05:33:19 GMT

Current Revision posted to Documents by FreescaleTools_and_Software on 10/8/2021 5:33:19 AM

This tutorial was extracted from Pavel Sadek post on the Freescale Community https://community.freescale.com/docs/DOC-95001 with his agreement.

Hi everyone!

I have made a simple touch sensing demo for KL25z Freedom board for fast user friendly test using OpenSDA MSD bootloader (default combined application in Open SDA when you receive the Freedom - Mass Storage Device and serial port).

Demo changes the brightness of red led populated on the board and communicate with FreeMaster visualization tool over embedded virtual serial port of Open SDA connection.

Touch sensing application is controlled by TSS (touch sensing software). For more information about touch sensing and download of TSS go to www.freescale.com/tss

The visualization output has 2 separate scope windows:

one showing signals captured from electrodes of slider
another one showing position of finger on a slider

The operation is really simple:

just drag and drop the attached *.s19 file into your device using MSD bootloader (as other precompiled projects for Freedom board)
open the *.pmp file that is associated with FreeMASTER
choose the correct COM port at speed of 38400 kbps and
start communication

The demo was built with CodeWarrior 10.4 using TSS library 3.0.1 embedded as Processor Expert component. The source code can be provided if there will be an interest.

There is no need to configure MAP file for FreeMaster communication, application uses so called TSA table - it is position independent this way.

If you are not familiar with FreeMASTER or not have it installed in your PC - go to www.freescale.com/freemaster to read more and download the free installer, install it and you are good to run the demo.

There are two independent snapshots below, showing the response to my finger movement along the slider

Enjoy!

and keep in touch

Attachments:

community.element14.com/.../Freedom_5F00_KL25z-_2800_using-TSA-table_2900_.zip
community.element14.com/.../simple_5F00_FMSTR.pmp.zip
community.element14.com/.../Freedom_5F00_KL25z.s19.zip
community.element14.com/.../MSD_2D00_FRDM_2D00_KL25Z_5F00_Pemicro_5F00_v109.zip

Tags: 32bit, touch, cortex-m0+, freescale, freedom_board, Cortex-M, kinetis, cortex, freemaster, frdm-kl25z, kinetis-l, cortex-m0, arm, freedom