DMA and USB FS

r239955_stm1 · ‎2014-07-21

Posted on July 21, 2014 at 09:42

Hey guys

I would like to know if it's possible to use DMA with USB Full Speed.

I already saw it with USB high speed (provide by ST's examples) but nothing with Full Speed.

I perform transfert data between a PC and MCU and DMA should be increase my throughput. I'm actually at 8Mbits/s.

Thank by advance

maggie · ‎2014-07-21

Posted on July 21, 2014 at 14:51

Search for ''STSW-STM32121'' for firmware and ''UM0424'' for documentation.

STSW-STM32121 is a firmware containing USB Full Speed applications for various STM32 MCUs.

The USB Audio Speaker for STM3210E-EVAL uses DMA 2 Channel 2, if CODEC's I2S mode to be used is circular.

r239955_stm1 · ‎2014-07-21

Posted on July 22, 2014 at 08:50

I'll have a look soon, thank you

JacobV · ‎2017-12-01

Posted on December 02, 2017 at 02:09

Adding for others looking for this functionality:

DMA is not possible in Full Speed for STM32F105xx, STM32F107xx, STM32F2xx and STM32F4xx. It is only available in High Speed.

Section 6.3.5

(DMA mode available only with the USB OTG HS core)