On Tue, 2011-06-28 at 17:19 +0800, Xiaofan Chen wrote: > On Tue, Jun 28, 2011 at 5:02 PM, Alex Stefan > <[email protected]> wrote: > > Hello, > > > > I am working on implementing a SPI protocol using bit-banging on the > > CBUS interface of a FT232H chip. The purpose would be to program another > > chip's flash memory via USB. > > > > The one I can't figure out is how to correctly time the SPI operations. > > I mean, how can I output a precise clk signal on SCK using bit-banging. > > Why do you need precise clock? And it depends on your definition > of "precise". > > reference: > http://libftdi.141977.n3.nabble.com/Re-libftdi-developer-intra2net-com-is-a-subscribers-only-list-td2682909.html > >
Thank you for your reply. From reading the programming guide of the chip I was living under the impression that it required some very rigid timing in order to program it by SPI. I was wrong as it seems the only timing that matters is the one between the edges of SCK and the data lines. Alex -- libftdi - see http://www.intra2net.com/en/developer/libftdi for details. To unsubscribe send a mail to [email protected]
