USB-composite device (MSD & CDC)

Discussion around products based on ARM Cortex-A5 core.

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Dieter
Posts: 15
Joined: Mon Sep 16, 2013 7:50 am

USB-composite device (MSD & CDC)

Tue Jul 08, 2014 4:33 pm

Hi,

I have some Problems with USB-devices on SAMA5D36-EK.

First I've made a composite-device MSD & CDC width DMA for USB:
MSD: works
CDC: only works for transmitting, for receiving, there is no DMA-transfer from USB-FIFO to memory, but the count of sendet bytes is shown correct.
If I compile for no DMA, CDC works in both direction, but MSD have some problems.

There are the same problems, if I configure only for CDC or only for MSD.

Thanks,
Dieter

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