[ECOS] Problems with cyg_io_read

[Amanda Heyward]

Hi Andrew,
     Thanks for the reply. I'm using the anon-cvs, as
that is the only way to get the EB40A working. I
assume that choosing the EB40A template also selects
the drivers from the anon-cvs. my serial port speed is
115200. and I'm not using any flow control.

In my read function, I'm using a cyg_uint8 *array as
the receiving buffer at the application end i.e the
data type cyg_io_read reads into is a cyg_uint8 type.
The sending application from the pc is implemented in
java, and the data type it sends is byte.
Interestingly if I use hyperterminal, and use a chr
array as the receiving buffer, then there is no
problem at all.
could this be the cause of the trouble.

Thanks you very much.

Amanda.
 

--- Andrew Lunn <andrew@lunn.ch> wrote:

> On Thu, Aug 19, 2004 at 02:16:49PM -0700, Amanda
> Heyward wrote:
> > Thanks again Andrew. I'm using the /dev/ser1 to
> open
> > and read. thats beacause I'm using the ttyS0 for
> GDB. 
> > Should I have to set some buffer limit somewhere.
> 
> Hi Amanda
> 
> The defaults should be fine i think. The EB40A uses
> the at91 serial
> driver. This keeps a 128 byte buffer in the driver.
> Are you running
> the serial port at very high speeds? Do you have any
> sort of flow
> control? Are you using anoncvs or eCos 2.0. There
> was a major rewrite
> of the at91 serial driver after eCos 2.0 was
> released. 
> 
>         Andrew
> 
> -- 
> Before posting, please read the FAQ:
> http://ecos.sourceware.org/fom/ecos
> and search the list archive:
> http://ecos.sourceware.org/ml/ecos-discuss
> 
> 



		
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