Using dma in uart driver

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Using dma in uart driver

418 Views
arisav
Contributor III

Hi 

We are using cyclic dma in our uart driver (modified imx-uart.c) and ocassionally there seems to have data loss in receive side. Is it possible to use dma without RTS/CTS handshaking?

Common transfer characteristics are:


kernel version:3.14.28
Baud Rate: 1000000
Handshaking:None
Using Cyclic DMA

Best Regards 

Ari

Labels (2)
1 Reply

137 Views
Yuri
NXP TechSupport
NXP TechSupport

Hello,

 

   To avoid data lost  RTS / CTS handshaking must be used.

Have a great day,

Yuri

 

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