DFU Bootloader

[kp2309]

Can I get the source code for DFU bootloader for K40. First I want to use it in tower kit and then in our board.

Please correct me if I am wrong: DFU(Device firmware upgrade) bootloader is the one in which K40 will act as Host and will scan for devices being connected to USB port. Once the device is enumerated it will use file system to read the executable from device connected and dump it in flash/EEPROM. On next power cycle or any event it will run new application

Is my understanding about DFU bootloader is right? If yes please help me get the source code.

Thanks in advance

-KP

[mnorman · Accepted solution]

KP,

USB DFU is used to upgrade the firmware of the USB device, not the host.  

USB DFU spec:

http://www.usb.org/developers/devclass_docs/DFU_1.1.pdf

You can find the application note for using the DFU software provided by Freescale for Kinetis here:

http://cache.freescale.com/files/microcontrollers/doc/app_note/AN4370.pdf

The software that goes with the app note is here:

http://www.freescale.com/webapp/sps/download/license.jsp?colCode=AN4370SW&location=null&fpsp=1&Paren...

I hope that helps. 

-mnorman