Additional using EDMA for copy time stamp from eCAP HW register in RAM

Could please describe what you want to achieve with more details?

Hi Biser!

I want to receive packets for the UART. Frequency of receiving packets 5ms. I need to know when receiving of each byte in the packet up to tens of nanoseconds.
For this I set up a UART with EDMA to receive a every byte, and different EDMA channel chained transmission (Timer HVREG -> RAM) after each byte.

I also want to transmit packets to UART. Frequency of packet transmission 5ms asynchronously from receiving packets. I also need to know the end time of packet transmission up to tens of nanoseconds. For this I set up a UART with EDMA as analogous to the receive, but no transmission a every byte, and through hw fifo buffer.

When I begin, and receive and transmit at the same time, the bytes transmitted corrupted. Begins transmitting 0xFF instead of normal characters.

Best regards? Vladimir

What software is this? This forum supports only the TI distributed Linux EZSDK.

My software is based on its  StarterWare_02_0 + drivers programmed by me + sysbios kernel. My driver does not use the operating system objects.

And what about the silicon, hardware?

After all, in the header forum says: "This forum supports technical questions related to silicon, hardware, Linux for the Sitara Processors ..."

Best regards? Vladimir