On 6 September 2013 07:54, Antony Pavlov <antonynpav...@gmail.com> wrote: > On Thu, 5 Sep 2013 19:17:50 +0100 > Peter Maydell <peter.mayd...@linaro.org> wrote: >> Does this UART really not have a FIFO? > > There is no public documentation on Digic chips. > Only Canon's engineers know something about Digic's FIFO (if it exists :).
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? If the real firmware uses this for anything remotely serious (ie for more than trivial and default-disabled debug info) it probably does have a FIFO. However, let's assume it doesn't for now. -- PMM
