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Problems to run USB stack v 4.1.1 msd_mfs_generic demo on FRDM-K20D50M

Question asked by Marco Aurelio P. Coelho on Aug 19, 2015
Latest reply on Aug 24, 2015 by Marco Aurelio P. Coelho



I'm trying to run USB Stack v. 4.1.1 msd_mfs_generic demo on FRDM-K20D50M. This will be reference to develop a USB memory stick Datalogger for my application with this MCU.


Since this demo was developed for TWR-K20D50M, I changed the sci initialization in order to properly configure the SGC and MUX registers and meet Freedom hardware setup and select the correct UART associated with Open SDA CDC.


But it didn't work. Not even Attach event was detected. I still couldn't find where and how the failure ocurred during debugging.


When I run the same demo for TWR-K70 for example, it works perfectly.


Could anybody help me with this issue?


Thanks and regards,


Marco Coelho