topic Re: Doubt.... in Kinetis Microcontrollers

Doubt....

balusting — Tue, 28 Jan 2014 02:06:59 GMT

Hi every1 I am new to FRDM-KL-25Z , i want to know whether we can use FRDM-KL-25Z for serial port to usb converter using FRDM-KL-25Z

Re: Doubt....

kerbal — Tue, 28 Jan 2014 04:38:06 GMT

The USB data can be shuffled to and from any of the UARTs within your user code.

For any of the UARTs to drive a "serial port" (DB-9/RS-232), you will need additional circuitry to provide the correct voltage and polarity.

Re: Doubt....

Paul_Tian — Tue, 28 Jan 2014 07:41:38 GMT

Hi, Balu

You can use FRDM-KL25Z as a serial port to USB. You can find such a sample project which is use USB to do a serial operation. The path is \KL25Z-SC\Kinetis L Sample Code\kl25_sc\klxx-sc-baremetal\build\iar. Project name is usb_device.

Hope my reply can help you.

Best Regards

Paul

Re: Doubt....

balusting — Tue, 28 Jan 2014 12:15:40 GMT

Am unable to find the path of project u specified . Please could u post the URL of project .

Could u please mention some projects on FRDM-KL-25Z

Thanks for ur reply ...

Re: Doubt....

balusting — Tue, 28 Jan 2014 12:16:49 GMT

Thanks for ur reply . .

Could u please mention some projects on FRDM-KL-25Z

Re: Doubt....

kerbal — Tue, 28 Jan 2014 14:09:02 GMT

P&E Microcomputer Systems

Download the firmware apps and usb drivers
I cannot remember for certain, but you may need to install the usb driver package before being able to access BOOTLOADER.
Put the FRDM into BOOTLOADER by holding down RESET as you plug in the "SDA" USB port. The LED should blink @ ~1Hz
The "SDA_INFO.HTM" file located on BOOTLOADER is the same as the link I posted to the drivers
Drag-and-drop "MSD-DEBUG-FRDM-KL25Z_Pemicro_v114.SDA" from the firmware zip file to BOOTLOADER
Nothing obvious will happen and there is no success dialog
Disconnect and reconnect the FRDM

You've deployed a CDC app to the HOST/DEBUGGER.

If it didn't work, you may need to update BOOTLOADER

Within the firmware zip, there is another zip; unzip it
Repeat 3-7 from above using "BOOTUPDATEAPP_Pemicro_v111.SDA"
Be sure to perform #7
Repeat 3-7 using the "MSD-DEBUG...."
Be sure to perform #7

You've updated BOOTLOADER and deployed a CDC app to the HOST/DEBUGGER.

Your OS should detect two new devices, a MSD and a CDC
The MSD should require no drivers and you should see that "BOOTLOADER" has become "FRDM-KL25Z"
The drivers for the CDC component are on the new "FRDM-KL25Z" drive; point windows to the .INF file to complete installation of the CDC component.
Within device manager, the CDC component will be listed under "Ports"; find the new CDC device and make note of the (COMxx) after its name; COM11, for example
In your favorite terminal program, send data to COMxx and it will route through the debugger chip to the target chip's UART0
Any code you upload to the TARGET can communicate with the USB via UART0

You have a working "USB-to-Serial"

If you deploy a CDC app to the TARGET as well:

You may utilize BOTH USB ports at the same time.
SDA USB is physically wired TARGET UART0 but you may redirect the data anywhere you want via user code
The TARGET USB port can be connected to any UART that isn't 0.
You may exchange data between the two USBs by exchanging data between the two UARTs.

Re: Doubt....

kerbal — Tue, 28 Jan 2014 14:28:24 GMT

You should look into Process Expert. It allows you to configure the TARGET with a drop-down-based GUI rather than hand-coding the bits.

To create the TARGET app:

Create a new KL25Z PEx project
Add USB component
Add serial component
Swap the data however you'd like via user code

There are specific clock settings required for USB to work; a Google of "KL25Z USB Clock PEx" or similar should return a relevant tutorial

I'm willing to bet that PEx comes with a ton of example code, as well.

Re: Doubt....

BlackNight — Tue, 28 Jan 2014 16:03:17 GMT

There are many KL25Z projects available here:

mcuoneclipse/Examples/FRDM-KL25Z at master ·GitHub

Have a look into the readme file in the projects, or here:

MCU on Eclipse | Everything on Eclipse, Microcontrollers and Software