Andreas Schwarz <andrea...@web.de> wrote: > daniel.n...@sigicom.com (Daniel Néri) wrote: > > > Andreas Schwarz <andrea...@web.de> writes: > > > > > I'm talking to a MMC in SPI-Mode, and if I don't check TXEPT (or > > > alternatively URXIFG0) it doesn't work reliably! > > > > It's actually pretty simple: UTXIFG gets set when UTXBUF becomes > > empty, i.e. when the data has moved from UTXBUF to the transmitter > > shift register and starts to shift out on the output pin. TXEPT is > > set when UTXBUF *and* the transmitter shift register are empty, i.e. > > after the last bit of the data has been shifted out (and no new data > > has been written to UTXBUF). > > Then I don't understand why it isn't sufficient to test UTXIFG in my > application:
After having a close look at the MMC datasheet again I found out that my initialisation wasn't correct. Now it works of course without TXEPT.
