I am working on K70 MCU on a custom board with MQX 4.0.0 and CW 5. I have implemented the SD card as Mass storage with the help of freescale examples. Now the problem I am facing is that slow data transfer rate between PC and device(~100kbps on windows and very slow on MAC pc). In order to improve the speed I tried to enable the USB HIGH SPEED mode in MQX 4.0.0 ( by defining HIGH_SPEED_DEVICE as 1 in usb_descripter.c ) but the code goes to despatch.s when I connected device to PC via USB. Please let me know how I can enable USB HIGH SPEED mode in MQX 4.0.0 without going to MQX 4.1. Because I found some difficulties while porting the code to 4.1, since have changed some bsp files.
I'd appreciate any information, thoughts, or ideas on how to implement this in MQX 4.0.