Not everyone is familiar with Git, and not everyone wants to use it. Although I think using Git or SVN is something every software engineer today needs to master 
To make it easier for the ‘non-Gitter’ to use the Processor Expert components, they are available now as *.PEupd files as described here. However, the *.PEupd files are just a snapshot, and not the latest and greatest. So how to use the latest component sources and example projects without Git?
gits in a box
Good news for everyone owning the FRDM-K20D50M board: I have extended the FSL_USB_Stack with USB CDC device class support for the K20D50M 
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USB CDC Test Application with the FRDM-K20D50M
Sometimes things take longer than anticipated. And this is definitely the case for my USB MSD Host project where I wanted to use a USB memory stick with the Freedom FRDM-KL25Z board.
Memory Stick attached to the Freedom Board
But finally, I have things working. At least most of the time ….
In “A Shell for the Freedom KL25Z Board” I have presented an application which implements FreeRTOS, LED’s and a shell using the UART on the KL25Z over OpenSDA. So why not adding native USB CDC to the mix? Using both the USB and CDC with the same shell?
So what I have added is that the shell runs on both the SCI (over OpenSDA) and USB CDC (with the KL25Z). For this, the FSL USB CDC software stack is now part of the project:
Shell Project with USB CDC
Checking the download statistics of my Processor Expert components on http://www.steinerberg.com/EmbeddedComponents/, there is a clear winner: FSL_USB_Stack
It has been a while I presented that universal USB CDC component in this blog. The component has received a larger re-architecture, I wanted to support more than just USB CDC. For this, the CDC part is now present in a separate sub-component:
FSL_USB_Stack with Sub-Components
Question: What to do on a rainy Sunday?
Answer: Having fun with USB and the KL25Z Freedom board! .
In “A shell for the Freedom board” I used the UART-to-USB OpenSDA capability of the KL25Z Freedom board: The KL25Z processor uses the OpenSDA K20 microprocessor as Serial-to-USB converter. But this only works because of the P&E OpenSDA USB CDC (Communication Device Class) implementation. If I create my board without OpenSDA, I need a different approach: I want to do USB CDC with the KL25Z 
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USB CDC Device on COM22
The 2012 London Olympics are over. And I had my own special sports event last weekend. Although not part of the Olympics, it is part of the Switzerland Central Mountain Race Championship. This is a series of mountain running challenges. And no, I did not run the race. I love the mountains, and I love hiking in the mountains, but this is definitely for the greatest athletes. Instead to run the race, I have chosen to implement and run the timing system .
Athletes approaching the finish line
I’m a big fan of physical UART/RS-232 ports on boards. So I was somewhat disappointed not to see a serial 9pin connector on the Freedom KL25Z board. But it is perfectly understood that for this price costs are critical, and a serial header or connector is pushing the budget for that board very likely out of the water. Still, I want serial connectivity for my applications.
Freedom Board with RGB LED
The FSL_USB_Stack Processor Expert component (see USB CDC reloaded) has been extended to support USB CDC for the Freescale S08MM128 targeted for medical devices:
Choice of devices
The FSL_USB_Stack Embedded Component presented in “USB CDC, reloaded” has been updated to V1.004 and is available here. I was running into issues if the USB CDC stack had to send out either 16 or 32 bytes of data in the App_Task() function. In that case the data is not sent until the next USB_Class_CDC_Interface_DIC_Send_Data() request.
