[Tinyos Core WG] RE: Small gotcha in UartStream interface

[Phil Buonadonna]

There's yet another issue:

What is the *default* state of the ReceiveInterrupt for the purpose of
signalling the receivedByte event?  Enabled or Disabled?  

The code that presently exists assumes it's *enabled*?  Is this intentional?
The interface docs should reflect this if so.

pb

 

> -----Original Message-----
> From: Phil Buonadonna 
> Sent: Friday, October 20, 2006 1:37 PM
> To: TinyOS Core WG
> Subject: Small gotcha in UartStream interface
> 
> One of the objective of using UartStream was to enable DMA 
> based data transfers. 
> 
> However the 'receivedByte()' event conflicts with the ability 
> to use DMA based receives.  Specifically, there's no way to 
> grab each individual byte if a DMA is in progress.
> 
> I think the fix is just to change the 'semantics' of this 
> functionality so that it CAN'T be used in conjuction with the 
> receive() call.  
> 
> Thoughts?
> 
> pb
>