From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ormund Williams To: ecos Subject: Re: [ECOS] Problems building stand-alone gdb stub for ARM AEB Date: Wed, 04 Oct 2000 10:30:00 -0000 Message-id: <39DB6970.6BA6C737@brainlink.com> References: X-SW-Source: 2000-10/msg00026.html Gary Thomas wrote: > > On 04-Oct-2000 Ormund Williams wrote: > > Framing errors are my problem. Seems like a hardware problem, so I'll > > work on that next. Has any body seen this problem? > > > > Notice that when you connect, the host will be sending you a string of > 6 characters or so at full speed. If the target device does not have > buffering or isn't quick enough, then this will surely cause framing > errors when running at speed. The UART on the ARM AEB has no FIFO so each character must be read before the next arrives, if that fails the Over-run flag is set in the Line Status Register. This I have tested by inserting a delay. The problem I'm seeing though, is the Frame error flag is set. This only happens with some character sequences, from that I am concluding that the board is malfunctioning, I am going to try a different one, I'll let you know how it goes. PS: There's no need to cc me since I'm subscribed to the list. Thanks -- Ormund