Posted on September 03, 2013 at 11:23Hi,
I've been experimenting on USB devices on STM32F4 discovery board. I have a small issue.
From the PC I send multiple messages (bulk_writes) to the USB, and I call 'dcd_ep_tx' within the Data_out function which invokes upon transfer complete interrupt on OUT packets.
The issue is when I do this and later when I read the same endpoint, I can receive around 4~7 packets which I have previously sent to the device. I still could not find the source for this behavior. I'm using the cdc example as the foundation in this application.
Is this due to some sort of a FIFO? If so where is it implemented?
My TX1 FIFO size is 128.
I hope the question is clear.
Thank you in advance.
#stm32f4
