On 6 September 2013 14:00, Antony Pavlov <antonynpav...@gmail.com> wrote: > On Fri, 6 Sep 2013 08:25:20 +0100 > Peter Maydell <peter.mayd...@linaro.org> wrote: >> You can deduce its existence though -- does the >> UART let you feed two or three characters to it >> at faster than whatever the serial line speed is >> before it sets the "stop sending me bits" status >> bit, or does it stop after the first? > > No, I can't :) > > How can I check this mysterious "stop sending me bits" status bit? > Do you mean the UART hardware flow control pin?
I meant ST_TX_RDY, but looking again at the docs perhaps I misinterpreted it. Do you really have to do: * write byte to TX register * set TX_RDY bit in status register to get it to send out a byte? I was expecting a more standard UART interface which is typically: * write byte to TX register * if the UART is unable to accept any more bytes (ie FIFO full, or just immediately if no FIFO present) it clears TX_RDY * software has to wait for TX_RDY to be set before writing another byte to TX -- PMM
