STM32F415RGT6 Internal DMA configuration support.

[S_Srinath]

Hi,

I am trying to use internal DMA configuration on STM32F415RGT6. Couldn't find the relevant support for enabling the dma and also watching off the dma transmit and receive flag as an Endpoint mode. The STM is operating as an Endpoint device. I am trying to send BULK IN. Existing doesn't have the internal DMA enabled. It is waiting for the entire Data to get transmitted. I need to use DMA for USB to perform parallel data send and resume other operations we have in our application.

[FBL]

Hi @S_Srinath 

Did you make sure to consider data alignment? (by multiple of 4 packet). In fact, internal DMA doesn't allow sending data from non-word aligned addresses.

[S_Srinath]

Hi @FBL,

We tried with 4 bytes aligned packet. We couldn't get the data from the HOST. Our DMA configuration is done on ST which acts like the Device mode. We tried checking the AHB Buss error bit also. I couldn't get any leads over it. It will be helpful if you could share any sample test codes for configuring this internal DMA.

[S_Srinath]

Hi,

Can I get a file which supports the integration similar to this on USB with internal DMA usage.

um1734-stm32cube-usb-device-library-stmicroelectronics.pdf We are trying to use similar example, it is not helping much. Couldn't read the data from Host side. Do we need to share 32bit data while device is in internal DMA mode?.

Can you share any specific example how we can use this internal DMA configuration.

[S_Srinath]

Hi,

Can I get a file which supports the integration similar to this on USB with internal DMA usage.

um1734-stm32cube-usb-device-library-stmicroelectronics.pdf We are trying to use similar example, it is not helping much. Couldn't read the data from Host side. Do we need to share 32bit data while device is in internal DMA mode?.

Can you share any specific example how we can use this internal DMA configuration.